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Diffstat (limited to 'kghostview/dscparse.cpp')
| -rw-r--r-- | kghostview/dscparse.cpp | 3432 |
1 files changed, 3432 insertions, 0 deletions
diff --git a/kghostview/dscparse.cpp b/kghostview/dscparse.cpp new file mode 100644 index 00000000..b5d2c3a7 --- /dev/null +++ b/kghostview/dscparse.cpp @@ -0,0 +1,3432 @@ +/* Copyright (C) 2000-2001, Ghostgum Software Pty Ltd. All rights reserved. + + This file is part of GSview. + + This file is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY. No author or distributor accepts responsibility + to anyone for the consequences of using it or for whether it serves any + particular purpose or works at all, unless he says so in writing. Refer + to the GNU General Public Licence for full details. + + Everyone is granted permission to copy, modify and redistribute this + file, but only under the conditions described in the GNU General + Public Licence. A copy of this license is supposed to have been given + to you along with this file so you can know your rights and + responsibilities. It should be in a file named COPYING. Among other + things, the copyright notice and this notice must be preserved on all + copies. +*/ + +/* $Id$ */ + +/* dscparse.c - DSC parser */ + +/* + * This is a DSC parser, based on the DSC 3.0 spec, + * with a few DSC 2.1 additions for page size. + * + * Current limitations: + * %%+ may be used after any comment in the comment or trailer, + * but is currently only supported by + * %%DocumentMedia + * + * DSC 2.1 additions (discontinued in DSC 3.0): + * %%DocumentPaperColors: + * %%DocumentPaperForms: + * %%DocumentPaperSizes: + * %%DocumentPaperWeights: + * %%PaperColor: (ignored) + * %%PaperForm: (ignored) + * %%PaperSize: + * %%PaperWeight: (ignored) + * + * Other additions for defaults or page section + % %%ViewingOrientation: xx xy yx yy +*/ + +#include <stdio.h> /* for sprintf(), not file I/O */ +#include <stdlib.h> +#include <string.h> +#include <ctype.h> + +#define MAXSTR 256 + +#include "dscparse.h" + +/* Macros for comparing string literals + * For maximum speed, the length of the second macro argument is + * computed at compile time. + * THE SECOND MACRO ARGUMENT MUST BE A STRING LITERAL. + */ +#define COMPARE(p,str) (strncmp((const char *)(p), (str), sizeof(str)-1)==0) +#define IS_DSC(line, str) (COMPARE((line), (str))) + +/* Macros for comparing the first one or two characters */ +#define IS_WHITE(ch) (((ch)==' ') || ((ch)=='\t')) +#define IS_EOL(ch) (((ch)=='\r') || ((ch)=='\n')) +#define IS_WHITE_OR_EOL(ch) (IS_WHITE(ch) || IS_EOL(ch)) +#define IS_BLANK(str) (IS_EOL(str[0])) +#define NOT_DSC_LINE(str) (((str)[0]!='%') || ((str)[1]!='%')) + +/* Macros for document offset to start and end of line */ +#define DSC_START(dsc) ((dsc)->data_offset + (dsc)->data_index - (dsc)->line_length) +#define DSC_END(dsc) ((dsc)->data_offset + (dsc)->data_index) + +/* dsc_scan_SECTION() functions return one of + * CDSC_ERROR, CDSC_OK, CDSC_NOTDSC + * or one of the following + */ +/* The line should be passed on to the next section parser. */ +#define CDSC_PROPAGATE 10 + +/* If document is DOS EPS and we haven't read 30 bytes, ask for more. */ +#define CDSC_NEEDMORE 11 + +template<class T> +inline T min (T a, T b) { return a < b ? a : b; } + +/* local prototypes */ +dsc_private void * dsc_memalloc(P2(CDSC *dsc, size_t size)); +dsc_private void dsc_memfree(P2(CDSC*dsc, void *ptr)); +dsc_private CDSC * dsc_init2(P1(CDSC *dsc)); +dsc_private void dsc_reset(P1(CDSC *dsc)); +dsc_private void dsc_section_join(P3(unsigned long begin, unsigned long *pend, unsigned long **pplast)); +dsc_private int dsc_read_line(P1(CDSC *dsc)); +dsc_private int dsc_read_doseps(P1(CDSC *dsc)); +dsc_private char * dsc_alloc_string(P3(CDSC *dsc, const char *str, int len)); +dsc_private char * dsc_add_line(P3(CDSC *dsc, const char *line, unsigned int len)); +dsc_private char * dsc_copy_string(P5(char *str, unsigned int slen, + char *line, unsigned int len, unsigned int *offset)); +dsc_private GSDWORD dsc_get_dword(P1(const unsigned char *buf)); +dsc_private GSWORD dsc_get_word(P1(const unsigned char *buf)); +dsc_private int dsc_get_int(P3(const char *line, unsigned int len, unsigned int *offset)); +dsc_private float dsc_get_real(P3(const char *line, unsigned int len, + unsigned int *offset)); +dsc_private int dsc_stricmp(P2(const char *s, const char *t)); +dsc_private void dsc_unknown(P1(CDSC *dsc)); +dsc_private GSBOOL dsc_is_section(char *line); +dsc_private int dsc_parse_pages(P1(CDSC *dsc)); +dsc_private int dsc_parse_bounding_box(P3(CDSC *dsc, CDSCBBOX** pbbox, int offset)); +dsc_private int dsc_parse_float_bounding_box(P3(CDSC *dsc, CDSCFBBOX** pfbbox, int offset)); +dsc_private int dsc_parse_orientation(P3(CDSC *dsc, unsigned int *porientation, + int offset)); +dsc_private int dsc_parse_order(P1(CDSC *dsc)); +dsc_private int dsc_parse_media(P2(CDSC *dsc, const CDSCMEDIA **page_media)); +dsc_private int dsc_parse_document_media(P1(CDSC *dsc)); +dsc_private int dsc_parse_viewing_orientation(P2(CDSC *dsc, CDSCCTM **pctm)); +dsc_private int dsc_parse_page(P1(CDSC *dsc)); +dsc_private void dsc_save_line(P1(CDSC *dsc)); +dsc_private int dsc_scan_type(P1(CDSC *dsc)); +dsc_private int dsc_scan_comments(P1(CDSC *dsc)); +dsc_private int dsc_scan_preview(P1(CDSC *dsc)); +dsc_private int dsc_scan_defaults(P1(CDSC *dsc)); +dsc_private int dsc_scan_prolog(P1(CDSC *dsc)); +dsc_private int dsc_scan_setup(P1(CDSC *dsc)); +dsc_private int dsc_scan_page(P1(CDSC *dsc)); +dsc_private int dsc_scan_trailer(P1(CDSC *dsc)); +dsc_private int dsc_error(P4(CDSC *dsc, unsigned int explanation, + char *line, unsigned int line_len)); + +/* DSC error reporting */ +dsc_private const int dsc_severity[] = { + CDSC_ERROR_WARN, /* CDSC_MESSAGE_BBOX */ + CDSC_ERROR_WARN, /* CDSC_MESSAGE_EARLY_TRAILER */ + CDSC_ERROR_WARN, /* CDSC_MESSAGE_EARLY_EOF */ + CDSC_ERROR_ERROR, /* CDSC_MESSAGE_PAGE_IN_TRAILER */ + CDSC_ERROR_ERROR, /* CDSC_MESSAGE_PAGE_ORDINAL */ + CDSC_ERROR_ERROR, /* CDSC_MESSAGE_PAGES_WRONG */ + CDSC_ERROR_ERROR, /* CDSC_MESSAGE_EPS_NO_BBOX */ + CDSC_ERROR_ERROR, /* CDSC_MESSAGE_EPS_PAGES */ + CDSC_ERROR_WARN, /* CDSC_MESSAGE_NO_MEDIA */ + CDSC_ERROR_WARN, /* CDSC_MESSAGE_ATEND */ + CDSC_ERROR_INFORM, /* CDSC_MESSAGE_DUP_COMMENT */ + CDSC_ERROR_INFORM, /* CDSC_MESSAGE_DUP_TRAILER */ + CDSC_ERROR_WARN, /* CDSC_MESSAGE_BEGIN_END */ + CDSC_ERROR_INFORM, /* CDSC_MESSAGE_BAD_SECTION */ + CDSC_ERROR_INFORM, /* CDSC_MESSAGE_LONG_LINE */ + CDSC_ERROR_WARN, /* CDSC_MESSAGE_INCORRECT_USAGE */ + 0 +}; + +#define DSC_MAX_ERROR ((sizeof(dsc_severity) / sizeof(int))-2) + +const CDSCMEDIA dsc_known_media[CDSC_KNOWN_MEDIA] = { + /* These sizes taken from Ghostscript gs_statd.ps */ + {"11x17", 792, 1224, 0, NULL, NULL, NULL}, + {"A0", 2380, 3368, 0, NULL, NULL, NULL}, + {"A1", 1684, 2380, 0, NULL, NULL, NULL}, + {"A2", 1190, 1684, 0, NULL, NULL, NULL}, + {"A3", 842, 1190, 0, NULL, NULL, NULL}, + {"A4", 595, 842, 0, NULL, NULL, NULL}, + {"A5", 421, 595, 0, NULL, NULL, NULL}, + {"A6", 297, 421, 0, NULL, NULL, NULL}, + {"A7", 210, 297, 0, NULL, NULL, NULL}, + {"A8", 148, 210, 0, NULL, NULL, NULL}, + {"A9", 105, 148, 0, NULL, NULL, NULL}, + {"A10", 74, 105, 0, NULL, NULL, NULL}, + {"B0", 2836, 4008, 0, NULL, NULL, NULL}, + {"B1", 2004, 2836, 0, NULL, NULL, NULL}, + {"B2", 1418, 2004, 0, NULL, NULL, NULL}, + {"B3", 1002, 1418, 0, NULL, NULL, NULL}, + {"B4", 709, 1002, 0, NULL, NULL, NULL}, /* ISO, but not Adobe standard */ + {"B5", 501, 709, 0, NULL, NULL, NULL}, /* ISO, but not Adobe standard */ + {"B6", 354, 501, 0, NULL, NULL, NULL}, + {"C0", 2600, 3677, 0, NULL, NULL, NULL}, + {"C1", 1837, 2600, 0, NULL, NULL, NULL}, + {"C2", 1298, 1837, 0, NULL, NULL, NULL}, + {"C3", 918, 1298, 0, NULL, NULL, NULL}, + {"C4", 649, 918, 0, NULL, NULL, NULL}, + {"C5", 459, 649, 0, NULL, NULL, NULL}, + {"C6", 323, 459, 0, NULL, NULL, NULL}, + {"Ledger", 1224, 792, 0, NULL, NULL, NULL}, + {"Legal", 612, 1008, 0, NULL, NULL, NULL}, + {"Letter", 612, 792, 0, NULL, NULL, NULL}, + {"Note", 612, 792, 0, NULL, NULL, NULL}, +// ISO and JIS B sizes are different.... + {"jisb0", 2916, 4128, 0, NULL, NULL, NULL}, + {"jisb1", 2064, 2916, 0, NULL, NULL, NULL}, + {"jisb2", 1458, 2064, 0, NULL, NULL, NULL}, + {"jisb3", 1032, 1458, 0, NULL, NULL, NULL}, + {"jisb4", 729, 1032, 0, NULL, NULL, NULL}, + {"jisb5", 516, 729, 0, NULL, NULL, NULL}, + {"jisb6", 363, 516, 0, NULL, NULL, NULL}, +// U.S. CAD standard paper sizes + {"archE", 2592, 3456, 0, NULL, NULL, NULL}, + {"archD", 1728, 2592, 0, NULL, NULL, NULL}, + {"archC", 1296, 1728, 0, NULL, NULL, NULL}, + {"archB", 864, 1296, 0, NULL, NULL, NULL}, + {"archA", 648, 864, 0, NULL, NULL, NULL}, +// Other paper sizes + {"flsa", 612, 936, 0, NULL, NULL, NULL}, /* U.S. foolscap */ + {"flse", 612, 936, 0, NULL, NULL, NULL}, /* European foolscap */ + {"halfletter", 396, 612, 0, NULL, NULL, NULL}, + {NULL, 0, 0, 0, NULL, NULL, NULL} +}; + +/* parser state */ +enum CDSC_SCAN_SECTION { + scan_none = 0, + scan_comments = 1, + scan_pre_preview = 2, + scan_preview = 3, + scan_pre_defaults = 4, + scan_defaults = 5, + scan_pre_prolog = 6, + scan_prolog = 7, + scan_pre_setup = 8, + scan_setup = 9, + scan_pre_pages = 10, + scan_pages = 11, + scan_pre_trailer = 12, + scan_trailer = 13, + scan_eof = 14 +}; + +static const char * const dsc_scan_section_name[15] = { + "Type", "Comments", + "pre-Preview", "Preview", + "pre-Defaults", "Defaults", + "pre-Prolog", "Prolog", + "pre-Setup", "Setup", + "pre-Page", "Page", + "pre-Trailer", "Trailer", + "EOF" +}; + +/******************************************************************/ +/* Public functions */ +/******************************************************************/ + +/* constructor */ +CDSC * +dsc_init(void *caller_data) +{ + CDSC *dsc = (CDSC *)malloc(sizeof(CDSC)); + if (dsc == NULL) + return NULL; + memset(dsc, 0, sizeof(CDSC)); + dsc->caller_data = caller_data; + + return dsc_init2(dsc); +} + +/* constructor, with caller supplied memalloc */ +CDSC * +dsc_init_with_alloc( + void *caller_data, + void *(*memalloc)(size_t size, void *closure_data), + void (*memfree)(void *ptr, void *closure_data), + void *closure_data) +{ + CDSC *dsc = (CDSC *)memalloc(sizeof(CDSC), closure_data); + if (dsc == NULL) + return NULL; + memset(dsc, 0, sizeof(CDSC)); + dsc->caller_data = caller_data; + + dsc->memalloc = memalloc; + dsc->memfree = memfree; + dsc->mem_closure_data = closure_data; + + return dsc_init2(dsc); +} + + + +/* destructor */ +void +dsc_free(CDSC *dsc) +{ + if (dsc == NULL) + return; + dsc_reset(dsc); + dsc_memfree(dsc, dsc); +} + + +/* Tell DSC parser how long document will be, to allow ignoring + * of early %%Trailer and %%EOF. This is optional. + */ +void +dsc_set_length(CDSC *dsc, unsigned long len) +{ + dsc->file_length = len; +} + +/* Process a buffer containing DSC comments and PostScript */ +/* Return value is < 0 for error, >=0 for OK. + * CDSC_ERROR + * CDSC_OK + * CDSC_NOTDSC (DSC will be ignored) + * other values indicate the last DSC comment read + */ +int +dsc_scan_data(CDSC *dsc, const char *data, int length) +{ + int bytes_read; + int code = 0; + + if (dsc == NULL) + return CDSC_ERROR; + + if (dsc->id == CDSC_NOTDSC) + return CDSC_NOTDSC; + dsc->id = CDSC_OK; + if (dsc->eof) + return CDSC_OK; /* ignore */ + + if (length == 0) { + /* EOF, so process what remains */ + dsc->eof = TRUE; + } + + do { + if (dsc->id == CDSC_NOTDSC) + break; + + if (length != 0) { + /* move existing data if needed */ + if (dsc->data_length > CDSC_DATA_LENGTH/2) { + memmove(dsc->data, dsc->data + dsc->data_index, + dsc->data_length - dsc->data_index); + dsc->data_offset += dsc->data_index; + dsc->data_length -= dsc->data_index; + dsc->data_index = 0; + } + /* append to buffer */ + bytes_read = min(length, (int)(CDSC_DATA_LENGTH - dsc->data_length)); + memcpy(dsc->data + dsc->data_length, data, bytes_read); + dsc->data_length += bytes_read; + data += bytes_read; + length -= bytes_read; + } + if (dsc->scan_section == scan_none) { + code = dsc_scan_type(dsc); + if (code == CDSC_NEEDMORE) { + /* need more characters before we can identify type */ + code = CDSC_OK; + break; + } + dsc->id = code; + } + + if (code == CDSC_NOTDSC) { + dsc->id = CDSC_NOTDSC; + break; + } + + while ((code = dsc_read_line(dsc)) > 0) { + if (dsc->id == CDSC_NOTDSC) + break; + if (dsc->doseps_end && + (dsc->data_offset + dsc->data_index > dsc->doseps_end)) { + /* have read past end of DOS EPS PostScript section */ + return CDSC_OK; /* ignore */ + } + if (dsc->eof) + return CDSC_OK; + if (dsc->skip_document) + continue; /* embedded document */ + if (dsc->skip_lines) + continue; /* embedded lines */ + if (IS_DSC(dsc->line, "%%BeginData:")) + continue; + if (IS_DSC(dsc->line, "%%BeginBinary:")) + continue; + if (IS_DSC(dsc->line, "%%EndDocument")) + continue; + if (IS_DSC(dsc->line, "%%EndData")) + continue; + if (IS_DSC(dsc->line, "%%EndBinary")) + continue; + + do { + switch (dsc->scan_section) { + case scan_comments: + code = dsc_scan_comments(dsc); + break; + case scan_pre_preview: + case scan_preview: + code = dsc_scan_preview(dsc); + break; + case scan_pre_defaults: + case scan_defaults: + code = dsc_scan_defaults(dsc); + break; + case scan_pre_prolog: + case scan_prolog: + code = dsc_scan_prolog(dsc); + break; + case scan_pre_setup: + case scan_setup: + code = dsc_scan_setup(dsc); + break; + case scan_pre_pages: + case scan_pages: + code = dsc_scan_page(dsc); + break; + case scan_pre_trailer: + case scan_trailer: + code = dsc_scan_trailer(dsc); + break; + case scan_eof: + code = CDSC_OK; + break; + default: + /* invalid state */ + code = CDSC_ERROR; + } + /* repeat if line is start of next section */ + } while (code == CDSC_PROPAGATE); + + /* if DOS EPS header not complete, ask for more */ + if (code == CDSC_NEEDMORE) { + code = CDSC_OK; + break; + } + if (code == CDSC_NOTDSC) { + dsc->id = CDSC_NOTDSC; + break; + } + } + } while (length != 0); + + return (code < 0) ? code : dsc->id; +} + +/* Tidy up from incorrect DSC comments */ +int +dsc_fixup(CDSC *dsc) +{ + unsigned int i; + char buf[32]; + unsigned long *last; + + if (dsc->id == CDSC_NOTDSC) + return 0; + + /* flush last partial line */ + dsc_scan_data(dsc, NULL, 0); + + /* Fix DSC error: code between %%EndSetup and %%Page */ + if (dsc->page_count && (dsc->page[0].begin != dsc->endsetup) + && (dsc->endsetup != dsc->beginsetup)) { + dsc->endsetup = dsc->page[0].begin; + dsc_debug_print(dsc, "Warning: code included between setup and first page\n"); + } + + /* Last page contained a false trailer, */ + /* so extend last page to start of trailer */ + if (dsc->page_count && (dsc->begintrailer != 0) && + (dsc->page[dsc->page_count-1].end != dsc->begintrailer)) { + dsc_debug_print(dsc, "Ignoring earlier misplaced trailer\n"); + dsc_debug_print(dsc, "and extending last page to start of trailer\n"); + dsc->page[dsc->page_count-1].end = dsc->begintrailer; + } + + /* + * Join up all sections. + * There might be extra code between them, or we might have + * missed including the \n which followed \r. + */ + last = &dsc->endcomments; + dsc_section_join(dsc->beginpreview, &dsc->endpreview, &last); + dsc_section_join(dsc->begindefaults, &dsc->enddefaults, &last); + dsc_section_join(dsc->beginprolog, &dsc->endprolog, &last); + dsc_section_join(dsc->beginsetup, &dsc->endsetup, &last); + for (i=0; i<dsc->page_count; i++) + dsc_section_join(dsc->page[i].begin, &dsc->page[i].end, &last); + if (dsc->begintrailer) + *last = dsc->begintrailer; + + if ((dsc->page_pages == 0) && (dsc->page_count == 1)) { + /* don't flag an error if %%Pages absent but one %%Page found */ + /* adjust incorrect page count */ + dsc->page_pages = dsc->page_count; + } + + /* Warnings and Errors that we can now identify */ + if ((dsc->page_count != dsc->page_pages)) { + int rc = dsc_error(dsc, CDSC_MESSAGE_PAGES_WRONG, NULL, 0); + switch (rc) { + case CDSC_RESPONSE_OK: + /* adjust incorrect page count */ + dsc->page_pages = dsc->page_count; + break; + case CDSC_RESPONSE_CANCEL: + break;; + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + + if (dsc->epsf && (dsc->bbox == (CDSCBBOX *)NULL)) { + /* EPS files MUST include a BoundingBox */ + int rc = dsc_error(dsc, CDSC_MESSAGE_EPS_NO_BBOX, NULL, 0); + switch (rc) { + case CDSC_RESPONSE_OK: + /* Assume that it is EPS */ + break; + case CDSC_RESPONSE_CANCEL: + /* Is NOT an EPS file */ + dsc->epsf = FALSE; + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + + if (dsc->epsf && ((dsc->page_count > 1) || (dsc->page_pages > 1))) { + int rc = dsc_error(dsc, CDSC_MESSAGE_EPS_PAGES, NULL, 0); + switch (rc) { + case CDSC_RESPONSE_OK: + /* Is an EPS file */ + break; + case CDSC_RESPONSE_CANCEL: + /* Is NOT an EPS file */ + dsc->epsf = FALSE; + break; + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + + if ((dsc->media_count == 1) && (dsc->page_media == NULL)) { + /* if one only media was specified, and default page media */ + /* was not specified, assume that default is the only media. */ + dsc->page_media = dsc->media[0]; + } + + if ((dsc->media_count != 0) && (dsc->page_media == NULL)) { + int rc = dsc_error(dsc, CDSC_MESSAGE_NO_MEDIA, NULL, 0); + switch (rc) { + case CDSC_RESPONSE_OK: + /* default media is first listed */ + dsc->page_media = dsc->media[0]; + break; + case CDSC_RESPONSE_CANCEL: + /* No default media */ + break; + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + + /* make sure all pages have a label */ + for (i=0; i<dsc->page_count; i++) { + if (strlen(dsc->page[i].label) == 0) { + sprintf(buf, "%d", i+1); + if ((dsc->page[i].label = dsc_alloc_string(dsc, buf, strlen(buf))) + == (char *)NULL) + return CDSC_ERROR; /* no memory */ + } + } + return CDSC_OK; +} + +/* Install a function to be used for displaying messages about + * DSC errors and warnings, and to request advice from user. + * Installing an error function is optional. + */ +void +dsc_set_error_function(CDSC *dsc, + int (*fn)(P5(void *caller_data, CDSC *dsc, + unsigned int explanation, const char *line, unsigned int line_len))) +{ + dsc->dsc_error_fn = fn; +} + + +/* Install a function for printing debug messages */ +/* This is optional */ +void +dsc_set_debug_function(CDSC *dsc, + void (*debug_fn)(P2(void *caller_data, const char *str))) +{ + dsc->debug_print_fn = debug_fn; +} + +/* Doesn't need to be public for PostScript documents */ +/* Made public so GSview can add pages when processing PDF files */ +int +dsc_add_page(CDSC *dsc, int ordinal, char *label) +{ + dsc->page[dsc->page_count].ordinal = ordinal; + dsc->page[dsc->page_count].label = + dsc_alloc_string(dsc, label, strlen(label)+1); + dsc->page[dsc->page_count].begin = 0; + dsc->page[dsc->page_count].end = 0; + dsc->page[dsc->page_count].orientation = CDSC_ORIENT_UNKNOWN; + dsc->page[dsc->page_count].media = NULL; + dsc->page[dsc->page_count].bbox = NULL; + dsc->page[dsc->page_count].viewing_orientation = NULL; + + dsc->page_count++; + if (dsc->page_count >= dsc->page_chunk_length) { + CDSCPAGE *new_page = (CDSCPAGE *)dsc_memalloc(dsc, + (CDSC_PAGE_CHUNK+dsc->page_count) * sizeof(CDSCPAGE)); + if (new_page == NULL) + return CDSC_ERROR; /* out of memory */ + memcpy(new_page, dsc->page, + dsc->page_count * sizeof(CDSCPAGE)); + dsc_memfree(dsc, dsc->page); + dsc->page= new_page; + dsc->page_chunk_length = CDSC_PAGE_CHUNK+dsc->page_count; + } + return CDSC_OK; +} + +/* Doesn't need to be public for PostScript documents */ +/* Made public so GSview can store PDF MediaBox */ +int +dsc_add_media(CDSC *dsc, CDSCMEDIA *media) +{ + CDSCMEDIA **newmedia_array; + CDSCMEDIA *newmedia; + + /* extend media array */ + newmedia_array = (CDSCMEDIA **)dsc_memalloc(dsc, + (dsc->media_count + 1) * sizeof(CDSCMEDIA *)); + if (newmedia_array == NULL) + return CDSC_ERROR; /* out of memory */ + if (dsc->media != NULL) { + memcpy(newmedia_array, dsc->media, + dsc->media_count * sizeof(CDSCMEDIA *)); + dsc_memfree(dsc, dsc->media); + } + dsc->media = newmedia_array; + + /* allocate new media */ + newmedia = dsc->media[dsc->media_count] = + (CDSCMEDIA *)dsc_memalloc(dsc, sizeof(CDSCMEDIA)); + if (newmedia == NULL) + return CDSC_ERROR; /* out of memory */ + newmedia->name = NULL; + newmedia->width = 595.0; + newmedia->height = 842.0; + newmedia->weight = 80.0; + newmedia->colour = NULL; + newmedia->type = NULL; + newmedia->mediabox = NULL; + + dsc->media_count++; + + if (media->name) { + newmedia->name = dsc_alloc_string(dsc, media->name, + strlen(media->name)); + if (newmedia->name == NULL) + return CDSC_ERROR; /* no memory */ + } + newmedia->width = media->width; + newmedia->height = media->height; + newmedia->weight = media->weight; + if (media->colour) { + newmedia->colour = dsc_alloc_string(dsc, media->colour, + strlen(media->colour)); + if (newmedia->colour == NULL) + return CDSC_ERROR; /* no memory */ + } + if (media->type) { + newmedia->type = dsc_alloc_string(dsc, media->type, + strlen(media->type)); + if (newmedia->type == NULL) + return CDSC_ERROR; /* no memory */ + } + newmedia->mediabox = NULL; + + if (media->mediabox) { + newmedia->mediabox = (CDSCBBOX *)dsc_memalloc(dsc, sizeof(CDSCBBOX)); + if (newmedia->mediabox == NULL) + return CDSC_ERROR; /* no memory */ + *newmedia->mediabox = *media->mediabox; + } + return CDSC_OK; +} + +/* Doesn't need to be public for PostScript documents */ +/* Made public so GSview can store PDF CropBox */ +int +dsc_set_page_bbox(CDSC *dsc, unsigned int page_number, + int llx, int lly, int urx, int ury) +{ + CDSCBBOX *bbox; + if (page_number >= dsc->page_count) + return CDSC_ERROR; + bbox = dsc->page[page_number].bbox; + if (bbox == NULL) + dsc->page[page_number].bbox = bbox = + (CDSCBBOX *)dsc_memalloc(dsc, sizeof(CDSCBBOX)); + if (bbox == NULL) + return CDSC_ERROR; + bbox->llx = llx; + bbox->lly = lly; + bbox->urx = urx; + bbox->ury = ury; + return CDSC_OK; +} + + +/******************************************************************/ +/* Private functions below here. */ +/******************************************************************/ + +dsc_private void * +dsc_memalloc(CDSC *dsc, size_t size) +{ + if (dsc->memalloc) + return dsc->memalloc(size, dsc->mem_closure_data); + return malloc(size); +} + +dsc_private void +dsc_memfree(CDSC*dsc, void *ptr) +{ + if (dsc->memfree) + dsc->memfree(ptr, dsc->mem_closure_data); + else + free(ptr); +} + +/* private constructor */ +dsc_private CDSC * +dsc_init2(CDSC *dsc) +{ + dsc_reset(dsc); + + dsc->string_head = (CDSCSTRING *)dsc_memalloc(dsc, sizeof(CDSCSTRING)); + if (dsc->string_head == NULL) { + dsc_free(dsc); + return NULL; /* no memory */ + } + dsc->string = dsc->string_head; + dsc->string->next = NULL; + dsc->string->data = (char *)dsc_memalloc(dsc, CDSC_STRING_CHUNK); + if (dsc->string->data == NULL) { + dsc_free(dsc); + return NULL; /* no memory */ + } + dsc->string->index = 0; + dsc->string->length = CDSC_STRING_CHUNK; + + dsc->page = (CDSCPAGE *)dsc_memalloc(dsc, CDSC_PAGE_CHUNK * sizeof(CDSCPAGE)); + if (dsc->page == NULL) { + dsc_free(dsc); + return NULL; /* no memory */ + } + dsc->page_chunk_length = CDSC_PAGE_CHUNK; + dsc->page_count = 0; + + dsc->line = NULL; + dsc->data_length = 0; + dsc->data_index = dsc->data_length; + + return dsc; +} + + +dsc_private void +dsc_reset(CDSC *dsc) +{ + unsigned int i; + /* Clear public members */ + dsc->dsc = FALSE; + dsc->ctrld = FALSE; + dsc->pjl = FALSE; + dsc->epsf = FALSE; + dsc->pdf = FALSE; + dsc->epsf = FALSE; + dsc->preview = CDSC_NOPREVIEW; + dsc->dsc_version = NULL; /* stored in dsc->string */ + dsc->language_level = 0; + dsc->document_data = CDSC_DATA_UNKNOWN; + dsc->begincomments = 0; + dsc->endcomments = 0; + dsc->beginpreview = 0; + dsc->endpreview = 0; + dsc->begindefaults = 0; + dsc->enddefaults = 0; + dsc->beginprolog = 0; + dsc->endprolog = 0; + dsc->beginsetup = 0; + dsc->endsetup = 0; + dsc->begintrailer = 0; + dsc->endtrailer = 0; + + for (i=0; i<dsc->page_count; i++) { + /* page media is pointer to an element of media or dsc_known_media */ + /* do not free it. */ + + if (dsc->page[i].bbox) + dsc_memfree(dsc, dsc->page[i].bbox); + if (dsc->page[i].viewing_orientation) + dsc_memfree(dsc, dsc->page[i].viewing_orientation); + } + if (dsc->page) + dsc_memfree(dsc, dsc->page); + dsc->page = NULL; + + dsc->page_count = 0; + dsc->page_pages = 0; + dsc->page_order = CDSC_ORDER_UNKNOWN; + dsc->page_orientation = CDSC_ORIENT_UNKNOWN; + if (dsc->viewing_orientation) + dsc_memfree(dsc, dsc->viewing_orientation); + dsc->viewing_orientation = NULL; + + if (dsc->media) { + for (i=0; i<dsc->media_count; i++) { + if (dsc->media[i]) { + if (dsc->media[i]->mediabox) + dsc_memfree(dsc, dsc->media[i]->mediabox); + dsc_memfree(dsc, dsc->media[i]); + } + } + dsc_memfree(dsc, dsc->media); + } + dsc->media_count = 0; + dsc->media = NULL; + + /* page_media is pointer to an element of media or dsc_known_media */ + /* do not free it. */ + dsc->page_media = NULL; + + if (dsc->bbox) + dsc_memfree(dsc, dsc->bbox); + dsc->bbox = NULL; + if (dsc->page_bbox) + dsc_memfree(dsc, dsc->page_bbox); + dsc->page_bbox = NULL; + if (dsc->doseps) + dsc_memfree(dsc, dsc->doseps); + dsc->doseps = NULL; + + dsc->dsc_title = NULL; + dsc->dsc_creator = NULL; + dsc->dsc_date = NULL; + dsc->dsc_for = NULL; + + + dsc->max_error = DSC_MAX_ERROR; + dsc->severity = dsc_severity; + + /* Clear private members */ + /* Don't touch dsc->caller_data */ + dsc->id = CDSC_OK; + dsc->scan_section = scan_none; + dsc->doseps_end = 0; + dsc->page_chunk_length = 0; + dsc->file_length = 0; + dsc->skip_document = 0; + dsc->skip_bytes = 0; + dsc->skip_lines = 0; + dsc->skip_pjl = 0; + dsc->begin_font_count = 0; + dsc->begin_feature_count = 0; + dsc->begin_resource_count = 0; + dsc->begin_procset_count = 0; + + dsc->data_length = 0; + dsc->data_index = 0; + dsc->data_offset = 0; + + dsc->eof = 0; + + dsc->line = 0; + dsc->line_length = 0; + dsc->eol = 0; + dsc->last_cr = FALSE; + dsc->line_count = 1; + dsc->long_line = FALSE; + memset(dsc->last_line, 0, sizeof(dsc->last_line)); + + dsc->string = dsc->string_head; + while (dsc->string != (CDSCSTRING *)NULL) { + if (dsc->string->data) + dsc_memfree(dsc, dsc->string->data); + dsc->string_head = dsc->string; + dsc->string = dsc->string->next; + dsc_memfree(dsc, dsc->string_head); + } + dsc->string_head = NULL; + dsc->string = NULL; + + /* don't touch caller functions */ + + /* public data */ + if (dsc->hires_bbox) + dsc_memfree(dsc, dsc->hires_bbox); + dsc->hires_bbox = NULL; + if (dsc->crop_box) + dsc_memfree(dsc, dsc->crop_box); + dsc->crop_box = NULL; +} + +/* +* Join up all sections. +* There might be extra code between them, or we might have +* missed including the \n which followed \r. +* begin is the start of this section +* pend is a pointer to the end of this section +* pplast is a pointer to a pointer of the end of the previous section +*/ +dsc_private void +dsc_section_join(unsigned long begin, unsigned long *pend, unsigned long **pplast) +{ + if (begin) + **pplast = begin; + if (*pend > begin) + *pplast = pend; +} + + +/* return value is 0 if no line available, or length of line */ +dsc_private int +dsc_read_line(CDSC *dsc) +{ + char *p, *last; + dsc->line = NULL; + + if (dsc->eof) { + /* return all that remains, even if line incomplete */ + dsc->line = dsc->data + dsc->data_index; + dsc->line_length = dsc->data_length - dsc->data_index; + dsc->data_index = dsc->data_length; + return dsc->line_length; + } + + /* ignore embedded bytes */ + if (dsc->skip_bytes) { + int cnt = min(dsc->skip_bytes, + (int)(dsc->data_length - dsc->data_index)); + dsc->skip_bytes -= cnt; + dsc->data_index += cnt; + if (dsc->skip_bytes != 0) + return 0; + } + + do { + dsc->line = dsc->data + dsc->data_index; + last = dsc->data + dsc->data_length; + if (dsc->data_index == dsc->data_length) { + dsc->line_length = 0; + return 0; + } + if (dsc->eol) { + /* if previous line was complete, increment line count */ + dsc->line_count++; + if (dsc->skip_lines) + dsc->skip_lines--; + } + + /* skip over \n which followed \r */ + if (dsc->last_cr && dsc->line[0] == '\n') { + dsc->data_index++; + dsc->line++; + } + dsc->last_cr = FALSE; + + /* look for EOL */ + dsc->eol = FALSE; + for (p = dsc->line; p < last; p++) { + if (*p == '\r') { + p++; + if ((p<last) && (*p == '\n')) + p++; /* include line feed also */ + else + dsc->last_cr = TRUE; /* we might need to skip \n */ + dsc->eol = TRUE; /* dsc->line is a complete line */ + break; + } + if (*p == '\n') { + p++; + dsc->eol = TRUE; /* dsc->line is a complete line */ + break; + } + if (*p == '\032') { /* MS-DOS Ctrl+Z */ + dsc->eol = TRUE; + } + } + if (dsc->eol == FALSE) { + /* we haven't got a complete line yet */ + if (dsc->data_length - dsc->data_index < sizeof(dsc->data)/2) { + /* buffer is less than half full, ask for some more */ + dsc->line_length = 0; + return 0; + } + } + dsc->data_index += dsc->line_length = (p - dsc->line); + } while (dsc->skip_lines && dsc->line_length); + + if (dsc->line_length == 0) + return 0; + + if ((dsc->line[0]=='%') && (dsc->line[1]=='%')) { + /* handle recursive %%BeginDocument */ + if ((dsc->skip_document) && dsc->line_length && + COMPARE(dsc->line, "%%EndDocument")) { + dsc->skip_document--; + } + + /* handle embedded lines or binary data */ + if (COMPARE(dsc->line, "%%BeginData:")) { + /* %%BeginData: <numberof>[ <type> [ <bytesorlines> ] ] + * <numberof> ::= <uint> (Lines or physical bytes) + * <type> ::= Hex | Binary | ASCII (Type of data) + * <bytesorlines> ::= Bytes | Lines (Read in bytes or lines) + */ + char begindata[MAXSTR+1]; + int cnt; + unsigned int num; + const char *numberof, *bytesorlines; + if ((num = dsc->line_length) >= sizeof(begindata)-1) + num = sizeof(begindata)-1; + + memcpy(begindata, dsc->line, num); + begindata[num] = '\0'; + numberof = strtok(begindata+12, " \r\n"); + strtok(NULL, " \r\n"); /* dump type */ + bytesorlines = strtok(NULL, " \r\n"); + if (bytesorlines == NULL) + bytesorlines = "Bytes"; + + if ( (numberof == NULL) || (bytesorlines == NULL) ) { + /* invalid usage of %%BeginData */ + /* ignore that we ever saw it */ + int rc = dsc_error(dsc, CDSC_MESSAGE_INCORRECT_USAGE, + dsc->line, dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + case CDSC_RESPONSE_CANCEL: + break; + case CDSC_RESPONSE_IGNORE_ALL: + return 0; + } + } + else { + cnt = atoi(numberof); + if (cnt) { + if (bytesorlines && (dsc_stricmp(bytesorlines, "Lines")==0)) { + /* skip cnt lines */ + if (dsc->skip_lines == 0) { + /* we are not already skipping lines */ + dsc->skip_lines = cnt+1; + } + } + else { + /* byte count doesn't includes \n or \r\n */ + /* or \r of %%BeginData: */ + /* skip cnt bytes */ + if (dsc->skip_bytes == 0) { + /* we are not already skipping lines */ + dsc->skip_bytes = cnt; + } + + } + } + } + } + else if (COMPARE(dsc->line, "%%BeginBinary:")) { + /* byte count doesn't includes \n or \r\n or \r of %%BeginBinary:*/ + unsigned long cnt = atoi(dsc->line + 14); + if (dsc->skip_bytes == 0) { + /* we are not already skipping lines */ + dsc->skip_bytes = cnt; + } + } + } + + if ((dsc->line[0]=='%') && (dsc->line[1]=='%') && + COMPARE(dsc->line, "%%BeginDocument:") ) { + /* Skip over embedded document, recursively */ + dsc->skip_document++; + } + + if (!dsc->long_line && (dsc->line_length > DSC_LINE_LENGTH)) { + dsc_error(dsc, CDSC_MESSAGE_LONG_LINE, dsc->line, dsc->line_length); + dsc->long_line = TRUE; + } + + return dsc->line_length; +} + + +/* Save last DSC line, for use with %%+ */ +dsc_private void +dsc_save_line(CDSC *dsc) +{ + int len = min((size_t) sizeof(dsc->last_line), (size_t) dsc->line_length); + memcpy(dsc->last_line, dsc->line, len); +} + +/* display unknown DSC line */ +dsc_private void +dsc_unknown(CDSC *dsc) +{ + if (dsc->debug_print_fn) { + char line[DSC_LINE_LENGTH]; + unsigned int length = min((unsigned)DSC_LINE_LENGTH-1, dsc->line_length); + sprintf(line, "Unknown in %s section at line %d:\n ", + dsc_scan_section_name[dsc->scan_section], dsc->line_count); + dsc_debug_print(dsc, line); + strncpy(line, dsc->line, length); + line[length] = '\0'; + dsc_debug_print(dsc, line); + } +} + + +dsc_private GSBOOL +dsc_is_section(char *line) +{ + if ( !((line[0]=='%') && (line[1]=='%')) ) + return FALSE; + if (IS_DSC(line, "%%BeginPreview")) + return TRUE; + if (IS_DSC(line, "%%BeginDefaults")) + return TRUE; + if (IS_DSC(line, "%%BeginProlog")) + return TRUE; + if (IS_DSC(line, "%%BeginSetup")) + return TRUE; + if (IS_DSC(line, "%%Page:")) + return TRUE; + if (IS_DSC(line, "%%Trailer")) + return TRUE; + if (IS_DSC(line, "%%EOF")) + return TRUE; + return FALSE; +} + + +dsc_private GSDWORD +dsc_get_dword(const unsigned char *buf) +{ + GSDWORD dw; + dw = (GSDWORD)buf[0]; + dw += ((GSDWORD)buf[1])<<8; + dw += ((GSDWORD)buf[2])<<16; + dw += ((GSDWORD)buf[3])<<24; + return dw; +} + +dsc_private GSWORD +dsc_get_word(const unsigned char *buf) +{ + GSWORD w; + w = (GSWORD)buf[0]; + w |= (GSWORD)(buf[1]<<8); + return w; +} + +dsc_private int +dsc_read_doseps(CDSC *dsc) +{ + unsigned char *line = (unsigned char *)dsc->line; + if ((dsc->doseps = (CDSCDOSEPS *)dsc_memalloc(dsc, sizeof(CDSCDOSEPS))) == NULL) + return CDSC_ERROR; /* no memory */ + + dsc->doseps->ps_begin = dsc_get_dword(line+4); + dsc->doseps->ps_length = dsc_get_dword(line+8); + dsc->doseps->wmf_begin = dsc_get_dword(line+12); + dsc->doseps->wmf_length = dsc_get_dword(line+16); + dsc->doseps->tiff_begin = dsc_get_dword(line+20); + dsc->doseps->tiff_length = dsc_get_dword(line+24); + dsc->doseps->checksum = dsc_get_word(line+28); + + dsc->doseps_end = dsc->doseps->ps_begin + dsc->doseps->ps_length; + + /* move data_index backwards to byte after doseps header */ + dsc->data_index -= dsc->line_length - 30; + /* we haven't read a line of PostScript code yet */ + dsc->line_count = 0; + /* skip from current position to start of PostScript section */ + dsc->skip_bytes = dsc->doseps->ps_begin - 30; + + if (dsc->doseps->tiff_begin) + dsc->preview = CDSC_TIFF; + if (dsc->doseps->wmf_begin) + dsc->preview = CDSC_WMF; + + return CDSC_OK; +} + + + +dsc_private int +dsc_parse_pages(CDSC *dsc) +{ + int ip, io; + unsigned int i; + char *p; + int n; + if ((dsc->page_pages != 0) && (dsc->scan_section == scan_comments)) { + int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_COMMENT, dsc->line, + dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + case CDSC_RESPONSE_CANCEL: + return CDSC_OK; /* ignore duplicate comments in header */ + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + if ((dsc->page_pages != 0) && (dsc->scan_section == scan_trailer)) { + int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_TRAILER, dsc->line, + dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + case CDSC_RESPONSE_CANCEL: + break; /* use duplicate comments in header */ + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + + n = IS_DSC(dsc->line, "%%+") ? 3 : 8; + while (IS_WHITE(dsc->line[n])) + n++; + p = dsc->line + n; + if (COMPARE(p, "atend")) { + int rc = dsc_error(dsc, CDSC_MESSAGE_ATEND, dsc->line, dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + /* assume (atend) */ + /* we should mark it as deferred */ + break; + case CDSC_RESPONSE_CANCEL: + /* ignore it */ + break; + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + else if (COMPARE(p, "(atend)")) { + /* do nothing */ + /* we should mark it as deferred */ + } + else { + ip = dsc_get_int(dsc->line+n, dsc->line_length-n, &i); + if (i) { + n+=i; + dsc->page_pages = ip; + io = dsc_get_int(dsc->line+n, dsc->line_length-n, &i); + if (i) { + /* DSC 2 uses extra integer to indicate page order */ + /* DSC 3 uses %%PageOrder: */ + if (dsc->page_order == CDSC_ORDER_UNKNOWN) + switch (io) { + case -1: + dsc->page_order = CDSC_DESCEND; + break; + case 0: + dsc->page_order = CDSC_SPECIAL; + break; + case 1: + dsc->page_order = CDSC_ASCEND; + break; + } + } + } + else { + int rc = dsc_error(dsc, CDSC_MESSAGE_INCORRECT_USAGE, dsc->line, + dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + case CDSC_RESPONSE_CANCEL: + /* ignore it */ + break; + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + } + return CDSC_OK; +} + +dsc_private int +dsc_parse_bounding_box(CDSC *dsc, CDSCBBOX** pbbox, int offset) +{ + unsigned int i, n; + int llx, lly, urx, ury; + float fllx, flly, furx, fury; + char *p; + /* Process first %%BoundingBox: in comments, and last in trailer */ + if ((*pbbox != NULL) && (dsc->scan_section == scan_comments)) { + int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_COMMENT, dsc->line, + dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + case CDSC_RESPONSE_CANCEL: + return CDSC_OK; /* ignore duplicate comments in header */ + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + if ((*pbbox != NULL) && (dsc->scan_section == scan_pages)) { + int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_COMMENT, dsc->line, + dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + case CDSC_RESPONSE_CANCEL: + return CDSC_OK; /* ignore duplicate comments in header */ + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + if ((*pbbox != NULL) && (dsc->scan_section == scan_trailer)) { + int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_TRAILER, dsc->line, + dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + case CDSC_RESPONSE_CANCEL: + break; /* use duplicate comments in trailer */ + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + if (*pbbox != NULL) { + dsc_memfree(dsc, *pbbox); + *pbbox = NULL; + } + + /* should only process first %%BoundingBox: */ + + while (IS_WHITE(dsc->line[offset])) + offset++; + p = dsc->line + offset; + + if (COMPARE(p, "atend")) { + int rc = dsc_error(dsc, CDSC_MESSAGE_ATEND, dsc->line, + dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + /* assume (atend) */ + /* we should mark it as deferred */ + break; + case CDSC_RESPONSE_CANCEL: + /* ignore it */ + break; + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + else if (COMPARE(p, "(atend)")) { + /* do nothing */ + /* we should mark it as deferred */ + } + else { + /* llx = */ lly = urx = ury = 0; + n = offset; + llx = dsc_get_int(dsc->line+n, dsc->line_length-n, &i); + n += i; + if (i) + lly = dsc_get_int(dsc->line+n, dsc->line_length-n, &i); + n += i; + if (i) + urx = dsc_get_int(dsc->line+n, dsc->line_length-n, &i); + n += i; + if (i) + ury = dsc_get_int(dsc->line+n, dsc->line_length-n, &i); + if (i) { + *pbbox = (CDSCBBOX *)dsc_memalloc(dsc, sizeof(CDSCBBOX)); + if (*pbbox == NULL) + return CDSC_ERROR; /* no memory */ + (*pbbox)->llx = llx; + (*pbbox)->lly = lly; + (*pbbox)->urx = urx; + (*pbbox)->ury = ury; + } + else { + int rc = dsc_error(dsc, CDSC_MESSAGE_BBOX, dsc->line, + dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + /* fllx = */ flly = furx = fury = 0.0; + n = offset; + n += i; + fllx = dsc_get_real(dsc->line+n, dsc->line_length-n, &i); + n += i; + if (i) + flly = dsc_get_real(dsc->line+n, dsc->line_length-n, &i); + n += i; + if (i) + furx = dsc_get_real(dsc->line+n, dsc->line_length-n, &i); + n += i; + if (i) + fury = dsc_get_real(dsc->line+n, dsc->line_length-n, &i); + if (i) { + *pbbox = (CDSCBBOX *)dsc_memalloc(dsc, sizeof(CDSCBBOX)); + if (*pbbox == NULL) + return CDSC_ERROR; /* no memory */ + (*pbbox)->llx = (int)fllx; + (*pbbox)->lly = (int)flly; + (*pbbox)->urx = (int)(furx+0.999); + (*pbbox)->ury = (int)(fury+0.999); + } + return CDSC_OK; + case CDSC_RESPONSE_CANCEL: + return CDSC_OK; + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + } + return CDSC_OK; +} + +dsc_private int +dsc_parse_float_bounding_box(CDSC *dsc, CDSCFBBOX** pbbox, int offset) +{ + unsigned int i, n; + float fllx, flly, furx, fury; + char *p; + /* Process first %%HiResBoundingBox: or %%CropBox: in comments, + * and last in trailer. + */ + if ((*pbbox != NULL) && (dsc->scan_section == scan_comments)) { + int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_COMMENT, dsc->line, + dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + case CDSC_RESPONSE_CANCEL: + return CDSC_OK; /* ignore duplicate comments in header */ + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + if ((*pbbox != NULL) && (dsc->scan_section == scan_pages)) { + int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_COMMENT, dsc->line, + dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + case CDSC_RESPONSE_CANCEL: + return CDSC_OK; /* ignore duplicate comments in header */ + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + if ((*pbbox != NULL) && (dsc->scan_section == scan_trailer)) { + int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_TRAILER, dsc->line, + dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + case CDSC_RESPONSE_CANCEL: + break; /* use duplicate comments in trailer */ + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + if (*pbbox != NULL) { + dsc_memfree(dsc, *pbbox); + *pbbox = NULL; + } + + /* should only process first %%BoundingBox: */ + + while (IS_WHITE(dsc->line[offset])) + offset++; + p = dsc->line + offset; + + if (COMPARE(p, "atend")) { + int rc = dsc_error(dsc, CDSC_MESSAGE_ATEND, dsc->line, + dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + /* assume (atend) */ + /* we should mark it as deferred */ + break; + case CDSC_RESPONSE_CANCEL: + /* ignore it */ + break; + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + else if (COMPARE(p, "(atend)")) { + /* do nothing */ + /* we should mark it as deferred */ + } + else { + /* fllx = */ flly = furx = fury = 0.0; + n = offset; + fllx = dsc_get_real(dsc->line+n, dsc->line_length-n, &i); + n += i; + if (i) + flly = dsc_get_real(dsc->line+n, dsc->line_length-n, &i); + n += i; + if (i) + furx = dsc_get_real(dsc->line+n, dsc->line_length-n, &i); + n += i; + if (i) + fury = dsc_get_real(dsc->line+n, dsc->line_length-n, &i); + if (i) { + *pbbox = (CDSCFBBOX *)dsc_memalloc(dsc, sizeof(CDSCFBBOX)); + if (*pbbox == NULL) + return CDSC_ERROR; /* no memory */ + (*pbbox)->fllx = fllx; + (*pbbox)->flly = flly; + (*pbbox)->furx = furx; + (*pbbox)->fury = fury; + } + } + return CDSC_OK; +} + +dsc_private int +dsc_parse_orientation(CDSC *dsc, unsigned int *porientation, int offset) +{ + char *p; + if ((dsc->page_orientation != CDSC_ORIENT_UNKNOWN) && + (dsc->scan_section == scan_comments)) { + int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_COMMENT, dsc->line, + dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + case CDSC_RESPONSE_CANCEL: + return CDSC_OK; /* ignore duplicate comments in header */ + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + if ((dsc->page_orientation != CDSC_ORIENT_UNKNOWN) && + (dsc->scan_section == scan_trailer)) { + int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_TRAILER, dsc->line, + dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + case CDSC_RESPONSE_CANCEL: + break; /* use duplicate comments in header; */ + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + p = dsc->line + offset; + while (IS_WHITE(*p)) + p++; + if (COMPARE(p, "atend")) { + int rc = dsc_error(dsc, CDSC_MESSAGE_ATEND, dsc->line, dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + /* assume (atend) */ + /* we should mark it as deferred */ + break; + case CDSC_RESPONSE_CANCEL: + /* ignore it */ + break; + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + else if (COMPARE(p, "(atend)")) { + /* do nothing */ + /* we should mark it as deferred */ + } + else if (COMPARE(p, "Portrait")) { + *porientation = CDSC_PORTRAIT; + } + else if (COMPARE(p, "Landscape")) { + *porientation = CDSC_LANDSCAPE; + } + else { + dsc_unknown(dsc); + } + return CDSC_OK; +} + +dsc_private int +dsc_parse_order(CDSC *dsc) +{ + char *p; + if ((dsc->page_order != CDSC_ORDER_UNKNOWN) && + (dsc->scan_section == scan_comments)) { + int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_COMMENT, dsc->line, + dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + case CDSC_RESPONSE_CANCEL: + return CDSC_OK; /* ignore duplicate comments in header */ + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + if ((dsc->page_order != CDSC_ORDER_UNKNOWN) && + (dsc->scan_section == scan_trailer)) { + int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_TRAILER, dsc->line, + dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + case CDSC_RESPONSE_CANCEL: + break; /* use duplicate comments in trailer */ + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + + p = dsc->line + (IS_DSC(dsc->line, "%%+") ? 3 : 13); + while (IS_WHITE(*p)) + p++; + if (COMPARE(p, "atend")) { + int rc = dsc_error(dsc, CDSC_MESSAGE_ATEND, dsc->line, + dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + /* assume (atend) */ + /* we should mark it as deferred */ + break; + case CDSC_RESPONSE_CANCEL: + /* ignore it */ + break; + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + else if (COMPARE(p, "(atend)")) { + /* do nothing */ + /* we should mark it as deferred */ + } + else if (COMPARE(p, "Ascend")) { + dsc->page_order = CDSC_ASCEND; + } + else if (COMPARE(p, "Descend")) { + dsc->page_order = CDSC_DESCEND; + } + else if (COMPARE(p, "Special")) { + dsc->page_order = CDSC_SPECIAL; + } + else { + dsc_unknown(dsc); + } + return CDSC_OK; +} + + +dsc_private int +dsc_parse_media(CDSC *dsc, const CDSCMEDIA **page_media) +{ + char media_name[MAXSTR]; + int n = IS_DSC(dsc->line, "%%+") ? 3 : 12; /* %%PageMedia: */ + unsigned int i; + + if (dsc_copy_string(media_name, sizeof(media_name)-1, + dsc->line+n, dsc->line_length-n, NULL)) { + for (i=0; i<dsc->media_count; i++) { + if (dsc->media[i]->name && + (dsc_stricmp(media_name, dsc->media[i]->name) == 0)) { + *page_media = dsc->media[i]; + return CDSC_OK; + } + } + } + dsc_unknown(dsc); + + return CDSC_OK; +} + + +dsc_private int +dsc_parse_document_media(CDSC *dsc) +{ + unsigned int i, n; + CDSCMEDIA lmedia; + GSBOOL blank_line; + + if (IS_DSC(dsc->line, "%%DocumentMedia:")) + n = 16; + else if (IS_DSC(dsc->line, "%%+")) + n = 3; + else + return CDSC_ERROR; /* error */ + + /* check for blank remainder of line */ + blank_line = TRUE; + for (i=n; i<dsc->line_length; i++) { + if (!IS_WHITE_OR_EOL(dsc->line[i])) { + blank_line = FALSE; + break; + } + } + + if (!blank_line) { + char name[MAXSTR]; + char colour[MAXSTR]; + char type[MAXSTR]; + lmedia.name = lmedia.colour = lmedia.type = (char *)NULL; + lmedia.width = lmedia.height = lmedia.weight = 0; + lmedia.mediabox = (CDSCBBOX *)NULL; + lmedia.name = dsc_copy_string(name, sizeof(name)-1, + dsc->line+n, dsc->line_length-n, &i); + n+=i; + if (i) + lmedia.width = dsc_get_real(dsc->line+n, dsc->line_length-n, &i); + n+=i; + if (i) + lmedia.height = dsc_get_real(dsc->line+n, dsc->line_length-n, &i); + n+=i; + if (i) + lmedia.weight = dsc_get_real(dsc->line+n, dsc->line_length-n, &i); + n+=i; + if (i) + lmedia.colour = dsc_copy_string(colour, sizeof(colour)-1, + dsc->line+n, dsc->line_length-n, &i); + n+=i; + if (i) + lmedia.type = dsc_copy_string(type, sizeof(type)-1, + dsc->line+n, dsc->line_length-n, &i); + + if (i==0) + dsc_unknown(dsc); /* we didn't get all fields */ + else { + if (dsc_add_media(dsc, &lmedia)) + return CDSC_ERROR; /* out of memory */ + } + } + return CDSC_OK; +} + +/* viewing orientation is believed to be the first four elements of + * a CTM matrix + */ +dsc_private int +dsc_parse_viewing_orientation(CDSC *dsc, CDSCCTM **pctm) +{ + CDSCCTM ctm; + unsigned int i, n; + + if (*pctm != NULL) { + dsc_memfree(dsc, *pctm); + *pctm = NULL; + } + + n = IS_DSC(dsc->line, "%%+") ? 3 : 21; /* %%ViewingOrientation: */ + while (IS_WHITE(dsc->line[n])) + n++; + + /* ctm.xx = */ ctm.xy = ctm.yx = ctm.yy = 0.0; + ctm.xx = dsc_get_real(dsc->line+n, dsc->line_length-n, &i); + n += i; + if (i) + ctm.xy = dsc_get_real(dsc->line+n, dsc->line_length-n, &i); + n += i; + if (i) + ctm.yx = dsc_get_real(dsc->line+n, dsc->line_length-n, &i); + n += i; + if (i) + ctm.yy = dsc_get_real(dsc->line+n, dsc->line_length-n, &i); + if (i==0) { + dsc_unknown(dsc); /* we didn't get all fields */ + } + else { + *pctm = (CDSCCTM *)dsc_memalloc(dsc, sizeof(CDSCCTM)); + if (*pctm == NULL) + return CDSC_ERROR; /* no memory */ + **pctm = ctm; + } + return CDSC_OK; +} + + +/* This is called before dsc_read_line(), since we may + * need to skip a binary header which contains a new line + * character + */ +dsc_private int +dsc_scan_type(CDSC *dsc) +{ + unsigned char *p; + unsigned char *line = (unsigned char *)(dsc->data + dsc->data_index); + int length = dsc->data_length - dsc->data_index; + + /* Types that should be known: + * DSC + * EPSF + * PJL + any of above + * ^D + any of above + * DOS EPS + * PDF + * non-DSC + */ + + /* First process any non PostScript headers */ + /* At this stage we do not have a complete line */ + + if (length == 0) + return CDSC_NEEDMORE; + + if (dsc->skip_pjl) { + /* skip until first PostScript comment */ + while (length >= 2) { + while (length && !IS_EOL(line[0])) { + /* skip until EOL character */ + line++; + dsc->data_index++; + length--; + } + while ((length >= 2) && IS_EOL(line[0]) && IS_EOL(line[1])) { + /* skip until EOL followed by non-EOL */ + line++; + dsc->data_index++; + length--; + } + if (length < 2) + return CDSC_NEEDMORE; + + if (IS_EOL(line[0]) && line[1]=='%') { + line++; + dsc->data_index++; + length--; + dsc->skip_pjl = FALSE; + break; + } + else { + /* line++; */ + dsc->data_index++; + /* length--; */ + return CDSC_NEEDMORE; + } + } + if (dsc->skip_pjl) + return CDSC_NEEDMORE; + } + + if (length == 0) + return CDSC_NEEDMORE; + + if (line[0] == '\004') { + line++; + dsc->data_index++; + length--; + dsc->ctrld = TRUE; + } + + if (line[0] == '\033') { + /* possibly PJL */ + if (length < 9) + return CDSC_NEEDMORE; + if (COMPARE(line, "\033%-12345X")) { + dsc->skip_pjl = TRUE; /* skip until first PostScript comment */ + dsc->pjl = TRUE; + dsc->data_index += 9; + return dsc_scan_type(dsc); + } + } + + if ((line[0]==0xc5) && (length < 4)) + return CDSC_NEEDMORE; + if ((line[0]==0xc5) && (line[1]==0xd0) && + (line[2]==0xd3) && (line[3]==0xc6) ) { + /* id is "EPSF" with bit 7 set */ + /* read DOS EPS header, then ignore all bytes until the PS section */ + if (length < 30) + return CDSC_NEEDMORE; + dsc->line = (char *)line; + if (dsc_read_doseps(dsc)) + return CDSC_ERROR; + } + else { + if (length < 2) + return CDSC_NEEDMORE; + if ((line[0] == '%') && (line[1] == 'P')) { + if (length < 5) + return CDSC_NEEDMORE; + if (COMPARE(line, "%PDF-")) { + dsc->pdf = TRUE; + dsc->scan_section = scan_comments; + return CDSC_OK; + } + } + } + + /* Finally process PostScript headers */ + + if (dsc_read_line(dsc) <= 0) + return CDSC_NEEDMORE; + + dsc->dsc_version = dsc_add_line(dsc, dsc->line, dsc->line_length); + if (COMPARE(dsc->line, "%!PS-Adobe")) { + dsc->dsc = TRUE; + dsc->begincomments = DSC_START(dsc); + if (dsc->dsc_version == NULL) + return CDSC_ERROR; /* no memory */ + p = (unsigned char *)dsc->line + 14; + while (IS_WHITE(*p)) + p++; + if (COMPARE(p, "EPSF-")) + dsc->epsf = TRUE; + dsc->scan_section = scan_comments; + return CDSC_PSADOBE; + } + if (COMPARE(dsc->line, "%!")) { + dsc->scan_section = scan_comments; + return CDSC_NOTDSC; + } + + dsc->scan_section = scan_comments; + return CDSC_NOTDSC; /* unrecognised */ +} + + + +dsc_private int +dsc_scan_comments(CDSC *dsc) +{ + /* Comments section ends at */ + /* %%EndComments */ + /* another section */ + /* line that does not start with %% */ + /* Save a few important lines */ + + char *line = dsc->line; + GSBOOL continued = FALSE; + dsc->id = CDSC_OK; + if (IS_DSC(line, "%%EndComments")) { + dsc->id = CDSC_ENDCOMMENTS; + dsc->endcomments = DSC_END(dsc); + dsc->scan_section = scan_pre_preview; + return CDSC_OK; + } + else if (IS_DSC(line, "%%BeginComments")) { + /* ignore because we are in this section */ + dsc->id = CDSC_BEGINCOMMENTS; + } + else if (dsc_is_section(line)) { + dsc->endcomments = DSC_START(dsc); + dsc->scan_section = scan_pre_preview; + return CDSC_PROPAGATE; + } + else if (line[0] == '%' && IS_WHITE_OR_EOL(line[1])) { + dsc->endcomments = DSC_START(dsc); + dsc->scan_section = scan_pre_preview; + return CDSC_PROPAGATE; + } + else if (line[0] != '%') { + dsc->id = CDSC_OK; + dsc->endcomments = DSC_START(dsc); + dsc->scan_section = scan_pre_preview; + return CDSC_PROPAGATE; + } + else if (IS_DSC(line, "%%Begin")) { + dsc->endcomments = DSC_START(dsc); + dsc->scan_section = scan_pre_preview; + return CDSC_PROPAGATE; + } + + /* Handle continuation lines. + * To simply processing, we assume that contination lines + * will only occur if repeat parameters are allowed and that + * a complete set of these parameters appears on each line. + * This is more restrictive than the DSC specification, but + * is valid for the DSC comments understood by this parser + * for all documents that we have seen. + */ + if (IS_DSC(line, "%%+")) { + line = dsc->last_line; + continued = TRUE; + } + else + dsc_save_line(dsc); + + if (IS_DSC(line, "%%Pages:")) { + dsc->id = CDSC_PAGES; + if (dsc_parse_pages(dsc) != 0) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%Creator:")) { + dsc->id = CDSC_CREATOR; + dsc->dsc_creator = dsc_add_line(dsc, dsc->line+10, dsc->line_length-10); + if (dsc->dsc_creator==NULL) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%CreationDate:")) { + dsc->id = CDSC_CREATIONDATE; + dsc->dsc_date = dsc_add_line(dsc, dsc->line+15, dsc->line_length-15); + if (dsc->dsc_date==NULL) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%Title:")) { + dsc->id = CDSC_TITLE; + dsc->dsc_title = dsc_add_line(dsc, dsc->line+8, dsc->line_length-8); + if (dsc->dsc_title==NULL) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%For:")) { + dsc->id = CDSC_FOR; + dsc->dsc_for = dsc_add_line(dsc, dsc->line+6, dsc->line_length-6); + if (dsc->dsc_for==NULL) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%LanguageLevel:")) { + unsigned int n = continued ? 3 : 16; + unsigned int i; + int ll; + dsc->id = CDSC_LANGUAGELEVEL; + ll = dsc_get_int(dsc->line+n, dsc->line_length-n, &i); + if (i) { + if ( (ll==1) || (ll==2) || (ll==3) ) + dsc->language_level = ll; + else { + dsc_unknown(dsc); + } + } + else + dsc_unknown(dsc); + } + else if (IS_DSC(line, "%%BoundingBox:")) { + dsc->id = CDSC_BOUNDINGBOX; + if (dsc_parse_bounding_box(dsc, &(dsc->bbox), continued ? 3 : 14)) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%HiResBoundingBox:")) { + dsc->id = CDSC_HIRESBOUNDINGBOX; + if (dsc_parse_float_bounding_box(dsc, &(dsc->hires_bbox), + continued ? 3 : 19)) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%CropBox:")) { + dsc->id = CDSC_CROPBOX; + if (dsc_parse_float_bounding_box(dsc, &(dsc->crop_box), + continued ? 3 : 10)) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%Orientation:")) { + dsc->id = CDSC_ORIENTATION; + if (dsc_parse_orientation(dsc, &(dsc->page_orientation), + continued ? 3 : 14)) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%PageOrder:")) { + dsc->id = CDSC_PAGEORDER; + if (dsc_parse_order(dsc)) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%DocumentMedia:")) { + dsc->id = CDSC_DOCUMENTMEDIA; + if (dsc_parse_document_media(dsc)) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%DocumentPaperSizes:")) { + /* DSC 2.1 */ + unsigned int n = continued ? 3 : 21; + unsigned int count = 0; + unsigned int i = 1; + char name[MAXSTR]; + char *p; + dsc->id = CDSC_DOCUMENTPAPERSIZES; + while (i && (dsc->line[n]!='\r') && (dsc->line[n]!='\n')) { + p = dsc_copy_string(name, sizeof(name)-1, + dsc->line+n, dsc->line_length-n, &i); + if (i && p) { + const CDSCMEDIA *m = dsc_known_media; + if (count >= dsc->media_count) { + /* set some default values */ + CDSCMEDIA lmedia; + lmedia.name = p; + lmedia.width = 595.0; + lmedia.height = 842.0; + lmedia.weight = 80.0; + lmedia.colour = NULL; + lmedia.type = NULL; + lmedia.mediabox = NULL; + if (dsc_add_media(dsc, &lmedia)) + return CDSC_ERROR; + } + else + dsc->media[count]->name = + dsc_alloc_string(dsc, p, strlen(p)); + /* find in list of known media */ + while (m && m->name) { + if (dsc_stricmp(p, m->name)==0) { + dsc->media[count]->width = m->width; + dsc->media[count]->height = m->height; + break; + } + m++; + } + } + n+=i; + count++; + } + } + else if (IS_DSC(line, "%%DocumentPaperForms:")) { + /* DSC 2.1 */ + unsigned int n = continued ? 3 : 21; + unsigned int count = 0; + unsigned int i = 1; + char type[MAXSTR]; + char *p; + dsc->id = CDSC_DOCUMENTPAPERFORMS; + while (i && (dsc->line[n]!='\r') && (dsc->line[n]!='\n')) { + p = dsc_copy_string(type, sizeof(type)-1, + dsc->line+n, dsc->line_length-n, &i); + if (i && p) { + if (count >= dsc->media_count) { + /* set some default values */ + CDSCMEDIA lmedia; + lmedia.name = NULL; + lmedia.width = 595.0; + lmedia.height = 842.0; + lmedia.weight = 80.0; + lmedia.colour = NULL; + lmedia.type = p; + lmedia.mediabox = NULL; + if (dsc_add_media(dsc, &lmedia)) + return CDSC_ERROR; + } + else + dsc->media[count]->type = + dsc_alloc_string(dsc, p, strlen(p)); + } + n+=i; + count++; + } + } + else if (IS_DSC(line, "%%DocumentPaperColors:")) { + /* DSC 2.1 */ + unsigned int n = continued ? 3 : 22; + unsigned int count = 0; + unsigned int i = 1; + char colour[MAXSTR]; + char *p; + dsc->id = CDSC_DOCUMENTPAPERCOLORS; + while (i && (dsc->line[n]!='\r') && (dsc->line[n]!='\n')) { + p = dsc_copy_string(colour, sizeof(colour)-1, + dsc->line+n, dsc->line_length-n, &i); + if (i && p) { + if (count >= dsc->media_count) { + /* set some default values */ + CDSCMEDIA lmedia; + lmedia.name = NULL; + lmedia.width = 595.0; + lmedia.height = 842.0; + lmedia.weight = 80.0; + lmedia.colour = p; + lmedia.type = NULL; + lmedia.mediabox = NULL; + if (dsc_add_media(dsc, &lmedia)) + return CDSC_ERROR; + } + else + dsc->media[count]->colour = + dsc_alloc_string(dsc, p, strlen(p)); + } + n+=i; + count++; + } + } + else if (IS_DSC(line, "%%DocumentPaperWeights:")) { + /* DSC 2.1 */ + unsigned int n = continued ? 3 : 23; + unsigned int count = 0; + unsigned int i = 1; + float w; + dsc->id = CDSC_DOCUMENTPAPERWEIGHTS; + while (i && (dsc->line[n]!='\r') && (dsc->line[n]!='\n')) { + w = dsc_get_real(dsc->line+n, dsc->line_length-n, &i); + if (i) { + if (count >= dsc->media_count) { + /* set some default values */ + CDSCMEDIA lmedia; + lmedia.name = NULL; + lmedia.width = 595.0; + lmedia.height = 842.0; + lmedia.weight = w; + lmedia.colour = NULL; + lmedia.type = NULL; + lmedia.mediabox = NULL; + if (dsc_add_media(dsc, &lmedia)) + return CDSC_ERROR; + } + else + dsc->media[count]->weight = w; + } + n+=i; + count++; + } + } + else if (IS_DSC(line, "%%DocumentData:")) { + unsigned int n = continued ? 3 : 15; + char *p = dsc->line + n; + while (IS_WHITE(*p)) + p++; + dsc->id = CDSC_DOCUMENTDATA; + if (COMPARE(p, "Clean7Bit")) + dsc->document_data = CDSC_CLEAN7BIT; + else if (COMPARE(p, "Clean8Bit")) + dsc->document_data = CDSC_CLEAN8BIT; + else if (COMPARE(p, "Binary")) + dsc->document_data = CDSC_BINARY; + else + dsc_unknown(dsc); + } + else if (IS_DSC(line, "%%Requirements:")) { + dsc->id = CDSC_REQUIREMENTS; + /* ignore */ + } + else if (IS_DSC(line, "%%DocumentNeededFonts:")) { + dsc->id = CDSC_DOCUMENTNEEDEDFONTS; + /* ignore */ + } + else if (IS_DSC(line, "%%DocumentSuppliedFonts:")) { + dsc->id = CDSC_DOCUMENTSUPPLIEDFONTS; + /* ignore */ + } + else if (dsc->line[0] == '%' && IS_WHITE_OR_EOL(dsc->line[1])) { + dsc->id = CDSC_OK; + /* ignore */ + } + else { + dsc->id = CDSC_UNKNOWNDSC; + dsc_unknown(dsc); + } + + dsc->endcomments = DSC_END(dsc); + return CDSC_OK; +} + + +dsc_private int +dsc_scan_preview(CDSC *dsc) +{ + /* Preview section ends at */ + /* %%EndPreview */ + /* another section */ + /* Preview section must start with %%BeginPreview */ + char *line = dsc->line; + dsc->id = CDSC_OK; + + if (dsc->scan_section == scan_pre_preview) { + if (IS_BLANK(line)) + return CDSC_OK; /* ignore blank lines before preview */ + else if (IS_DSC(line, "%%BeginPreview")) { + dsc->id = CDSC_BEGINPREVIEW; + dsc->beginpreview = DSC_START(dsc); + dsc->endpreview = DSC_END(dsc); + dsc->scan_section = scan_preview; + /* Don't mark the preview as EPSI if a DOS EPS header is present */ + if (dsc->preview == CDSC_NOPREVIEW) + dsc->preview = CDSC_EPSI; + return CDSC_OK; + } + else { + dsc->scan_section = scan_pre_defaults; + return CDSC_PROPAGATE; + } + } + + if (IS_DSC(line, "%%BeginPreview")) { + /* ignore because we are in this section */ + } + else if (dsc_is_section(line)) { + dsc->endpreview = DSC_START(dsc); + dsc->scan_section = scan_pre_defaults; + return CDSC_PROPAGATE; + } + else if (IS_DSC(line, "%%EndPreview")) { + dsc->id = CDSC_ENDPREVIEW; + dsc->endpreview = DSC_END(dsc); + dsc->scan_section = scan_pre_defaults; + return CDSC_OK; + } + else if (line[0] == '%' && line[1] != '%') { + /* Ordinary comments are OK */ + } + else { + dsc->id = CDSC_UNKNOWNDSC; + /* DSC comments should not occur in preview */ + dsc_unknown(dsc); + } + + dsc->endpreview = DSC_END(dsc); + return CDSC_OK; +} + +dsc_private int +dsc_scan_defaults(CDSC *dsc) +{ + /* Defaults section ends at */ + /* %%EndDefaults */ + /* another section */ + /* Defaults section must start with %%BeginDefaults */ + char *line = dsc->line; + dsc->id = CDSC_OK; + + if (dsc->scan_section == scan_pre_defaults) { + if (IS_BLANK(line)) + return CDSC_OK; /* ignore blank lines before defaults */ + else if (IS_DSC(line, "%%BeginDefaults")) { + dsc->id = CDSC_BEGINDEFAULTS; + dsc->begindefaults = DSC_START(dsc); + dsc->enddefaults = DSC_END(dsc); + dsc->scan_section = scan_defaults; + return CDSC_OK; + } + else { + dsc->scan_section = scan_pre_prolog; + return CDSC_PROPAGATE; + } + } + + if (NOT_DSC_LINE(line)) { + /* ignore */ + } + else if (IS_DSC(line, "%%BeginPreview")) { + /* ignore because we have already processed this section */ + } + else if (IS_DSC(line, "%%BeginDefaults")) { + /* ignore because we are in this section */ + } + else if (dsc_is_section(line)) { + dsc->enddefaults = DSC_START(dsc); + dsc->scan_section = scan_pre_prolog; + return CDSC_PROPAGATE; + } + else if (IS_DSC(line, "%%EndDefaults")) { + dsc->id = CDSC_ENDDEFAULTS; + dsc->enddefaults = DSC_END(dsc); + dsc->scan_section = scan_pre_prolog; + return CDSC_OK; + } + else if (IS_DSC(line, "%%PageMedia:")) { + dsc->id = CDSC_PAGEMEDIA; + dsc_parse_media(dsc, &dsc->page_media); + } + else if (IS_DSC(line, "%%PageOrientation:")) { + dsc->id = CDSC_PAGEORIENTATION; + /* This can override %%Orientation: */ + if (dsc_parse_orientation(dsc, &(dsc->page_orientation), 18)) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%PageBoundingBox:")) { + dsc->id = CDSC_PAGEBOUNDINGBOX; + if (dsc_parse_bounding_box(dsc, &(dsc->page_bbox), 18)) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%ViewingOrientation:")) { + dsc->id = CDSC_VIEWINGORIENTATION; + if (dsc_parse_viewing_orientation(dsc, &dsc->viewing_orientation)) + return CDSC_ERROR; + } + else { + dsc->id = CDSC_UNKNOWNDSC; + /* All other DSC comments are unknown, but not an error */ + dsc_unknown(dsc); + } + dsc->enddefaults = DSC_END(dsc); + return CDSC_OK; +} + +/* CDSC_RESPONSE_OK and CDSC_RESPONSE_CANCEL mean ignore the + * mismatch (default) */ +dsc_private int +dsc_check_match_prompt(CDSC *dsc, const char *str, int count) +{ + if (count != 0) { + char buf[MAXSTR+MAXSTR] = ""; + if (dsc->line_length < (unsigned int)(sizeof(buf)/2-1)) { + strncpy(buf, dsc->line, dsc->line_length); + buf[dsc->line_length] = '\0'; + } + sprintf(buf+strlen(buf), "\n%%%%Begin%.40s: / %%%%End%.40s\n", str, str); + return dsc_error(dsc, CDSC_MESSAGE_BEGIN_END, buf, strlen(buf)); + } + return CDSC_RESPONSE_CANCEL; +} + +dsc_private int +dsc_check_match_type(CDSC *dsc, const char *str, int count) +{ + if (dsc_check_match_prompt(dsc, str, count) == CDSC_RESPONSE_IGNORE_ALL) + return CDSC_NOTDSC; + return CDSC_OK; +} + +/* complain if Begin/End blocks didn't match */ +/* return non-zero if we should ignore all DSC */ +dsc_private int +dsc_check_match(CDSC *dsc) +{ + int rc = 0; + const char *font = "Font"; + const char *feature = "Feature"; + const char *resource = "Resource"; + const char *procset = "ProcSet"; + + if (!rc) + rc = dsc_check_match_type(dsc, font, dsc->begin_font_count); + if (!rc) + rc = dsc_check_match_type(dsc, feature, dsc->begin_feature_count); + if (!rc) + rc = dsc_check_match_type(dsc, resource, dsc->begin_resource_count); + if (!rc) + rc = dsc_check_match_type(dsc, procset, dsc->begin_procset_count); + + dsc->begin_font_count = 0; + dsc->begin_feature_count = 0; + dsc->begin_resource_count = 0; + dsc->begin_procset_count = 0; + return rc; +} + + +dsc_private int +dsc_scan_prolog(CDSC *dsc) +{ + /* Prolog section ends at */ + /* %%EndProlog */ + /* another section */ + /* Prolog section may start with %%BeginProlog or non-dsc line */ + char *line = dsc->line; + dsc->id = CDSC_OK; + + if (dsc->scan_section == scan_pre_prolog) { + if (dsc_is_section(line) && (!IS_DSC(line, "%%BeginProlog"))) { + dsc->scan_section = scan_pre_setup; + return CDSC_PROPAGATE; + } + dsc->id = CDSC_BEGINPROLOG; + dsc->beginprolog = DSC_START(dsc); + dsc->endprolog = DSC_END(dsc); + dsc->scan_section = scan_prolog; + if (IS_DSC(line, "%%BeginProlog")) + return CDSC_OK; + } + + if (NOT_DSC_LINE(line)) { + /* ignore */ + } + else if (IS_DSC(line, "%%BeginPreview")) { + /* ignore because we have already processed this section */ + } + else if (IS_DSC(line, "%%BeginDefaults")) { + /* ignore because we have already processed this section */ + } + else if (IS_DSC(line, "%%BeginProlog")) { + /* ignore because we are in this section */ + } + else if (dsc_is_section(line)) { + dsc->endprolog = DSC_START(dsc); + dsc->scan_section = scan_pre_setup; + if (dsc_check_match(dsc)) + return CDSC_NOTDSC; + return CDSC_PROPAGATE; + } + else if (IS_DSC(line, "%%EndProlog")) { + dsc->id = CDSC_ENDPROLOG; + dsc->endprolog = DSC_END(dsc); + dsc->scan_section = scan_pre_setup; + if (dsc_check_match(dsc)) + return CDSC_NOTDSC; + return CDSC_OK; + } + else if (IS_DSC(line, "%%BeginFont:")) { + dsc->id = CDSC_BEGINFONT; + /* ignore Begin/EndFont, apart form making sure */ + /* that they are matched. */ + dsc->begin_font_count++; + } + else if (IS_DSC(line, "%%EndFont")) { + dsc->id = CDSC_ENDFONT; + dsc->begin_font_count--; + } + else if (IS_DSC(line, "%%BeginFeature:")) { + dsc->id = CDSC_BEGINFEATURE; + /* ignore Begin/EndFeature, apart form making sure */ + /* that they are matched. */ + dsc->begin_feature_count++; + } + else if (IS_DSC(line, "%%EndFeature")) { + dsc->id = CDSC_ENDFEATURE; + dsc->begin_feature_count--; + } + else if (IS_DSC(line, "%%BeginResource:")) { + dsc->id = CDSC_BEGINRESOURCE; + /* ignore Begin/EndResource, apart form making sure */ + /* that they are matched. */ + dsc->begin_resource_count++; + } + else if (IS_DSC(line, "%%EndResource")) { + dsc->id = CDSC_ENDRESOURCE; + dsc->begin_resource_count--; + } + else if (IS_DSC(line, "%%BeginProcSet:")) { + dsc->id = CDSC_BEGINPROCSET; + /* ignore Begin/EndProcSet, apart form making sure */ + /* that they are matched. */ + dsc->begin_procset_count++; + } + else if (IS_DSC(line, "%%EndProcSet")) { + dsc->id = CDSC_ENDPROCSET; + dsc->begin_procset_count--; + } + else { + /* All other DSC comments are unknown, but not an error */ + dsc->id = CDSC_UNKNOWNDSC; + dsc_unknown(dsc); + } + + dsc->endprolog = DSC_END(dsc); + return CDSC_OK; +} + +dsc_private int +dsc_scan_setup(CDSC *dsc) +{ + /* Setup section ends at */ + /* %%EndSetup */ + /* another section */ + /* Setup section must start with %%BeginSetup */ + + char *line = dsc->line; + dsc->id = CDSC_OK; + + if (dsc->scan_section == scan_pre_setup) { + if (IS_BLANK(line)) + return CDSC_OK; /* ignore blank lines before setup */ + else if (IS_DSC(line, "%%BeginSetup")) { + dsc->id = CDSC_BEGINSETUP; + dsc->beginsetup = DSC_START(dsc); + dsc->endsetup = DSC_END(dsc); + dsc->scan_section = scan_setup; + return CDSC_OK; + } + else { + dsc->scan_section = scan_pre_pages; + return CDSC_PROPAGATE; + } + } + + if (NOT_DSC_LINE(line)) { + /* ignore */ + } + else if (IS_DSC(line, "%%BeginPreview")) { + /* ignore because we have already processed this section */ + } + else if (IS_DSC(line, "%%BeginDefaults")) { + /* ignore because we have already processed this section */ + } + else if (IS_DSC(line, "%%BeginProlog")) { + /* ignore because we have already processed this section */ + } + else if (IS_DSC(line, "%%BeginSetup")) { + /* ignore because we are in this section */ + } + else if (dsc_is_section(line)) { + dsc->endsetup = DSC_START(dsc); + dsc->scan_section = scan_pre_pages; + if (dsc_check_match(dsc)) + return CDSC_NOTDSC; + return CDSC_PROPAGATE; + } + else if (IS_DSC(line, "%%EndSetup")) { + dsc->id = CDSC_ENDSETUP; + dsc->endsetup = DSC_END(dsc); + dsc->scan_section = scan_pre_pages; + if (dsc_check_match(dsc)) + return CDSC_NOTDSC; + return CDSC_OK; + } + else if (IS_DSC(line, "%%BeginFeature:")) { + dsc->id = CDSC_BEGINFEATURE; + /* ignore Begin/EndFeature, apart form making sure */ + /* that they are matched. */ + dsc->begin_feature_count++; + } + else if (IS_DSC(line, "%%EndFeature")) { + dsc->id = CDSC_ENDFEATURE; + dsc->begin_feature_count--; + } + else if (IS_DSC(line, "%%Feature:")) { + dsc->id = CDSC_FEATURE; + /* ignore */ + } + else if (IS_DSC(line, "%%BeginResource:")) { + dsc->id = CDSC_BEGINRESOURCE; + /* ignore Begin/EndResource, apart form making sure */ + /* that they are matched. */ + dsc->begin_resource_count++; + } + else if (IS_DSC(line, "%%EndResource")) { + dsc->id = CDSC_ENDRESOURCE; + dsc->begin_resource_count--; + } + else if (IS_DSC(line, "%%PaperColor:")) { + dsc->id = CDSC_PAPERCOLOR; + /* ignore */ + } + else if (IS_DSC(line, "%%PaperForm:")) { + dsc->id = CDSC_PAPERFORM; + /* ignore */ + } + else if (IS_DSC(line, "%%PaperWeight:")) { + dsc->id = CDSC_PAPERWEIGHT; + /* ignore */ + } + else if (IS_DSC(line, "%%PaperSize:")) { + /* DSC 2.1 */ + GSBOOL found_media = FALSE; + int i; + int n = 12; + char buf[MAXSTR]; + buf[0] = '\0'; + dsc->id = CDSC_PAPERSIZE; + dsc_copy_string(buf, sizeof(buf)-1, dsc->line+n, dsc->line_length-n, + NULL); + for (i=0; i<(int)dsc->media_count; i++) { + if (dsc->media[i] && dsc->media[i]->name && + (dsc_stricmp(buf, dsc->media[i]->name)==0)) { + dsc->page_media = dsc->media[i]; + found_media = TRUE; + break; + } + } + if (!found_media) { + /* It didn't match %%DocumentPaperSizes: */ + /* Try our known media */ + const CDSCMEDIA *m = dsc_known_media; + while (m->name) { + if (dsc_stricmp(buf, m->name)==0) { + dsc->page_media = m; + break; + } + m++; + } + if (m->name == NULL) + dsc_unknown(dsc); + } + } + else { + /* All other DSC comments are unknown, but not an error */ + dsc->id = CDSC_UNKNOWNDSC; + dsc_unknown(dsc); + } + + dsc->endsetup = DSC_END(dsc); + return CDSC_OK; +} + +dsc_private int +dsc_scan_page(CDSC *dsc) +{ + /* Page section ends at */ + /* %%Page */ + /* %%Trailer */ + /* %%EOF */ + char *line = dsc->line; + dsc->id = CDSC_OK; + + if (dsc->scan_section == scan_pre_pages) { + if (IS_DSC(line, "%%Page:")) { + dsc->scan_section = scan_pages; + /* fall through */ + } + else { + /* %%Page: didn't follow %%EndSetup + * Keep reading until reach %%Page or %%Trailer + * and add it to previous section. + */ + unsigned long *last; + if (dsc->endsetup != 0) + last = &dsc->endsetup; + else if (dsc->endprolog != 0) + last = &dsc->endprolog; + else if (dsc->enddefaults != 0) + last = &dsc->enddefaults; + else if (dsc->endpreview != 0) + last = &dsc->endpreview; + else if (dsc->endcomments != 0) + last = &dsc->endcomments; + else + last = &dsc->begincomments; + *last = DSC_START(dsc); + if (IS_DSC(line, "%%Trailer") || IS_DSC(line, "%%EOF")) { + dsc->scan_section = scan_pre_trailer; + return CDSC_PROPAGATE; + } + return CDSC_OK; + } + } + + if (NOT_DSC_LINE(line)) { + /* ignore */ + } + else if (IS_DSC(line, "%%Page:")) { + dsc->id = CDSC_PAGE; + if (dsc->page_count) { + dsc->page[dsc->page_count-1].end = DSC_START(dsc); + if (dsc_check_match(dsc)) + return CDSC_NOTDSC; + } + + if (dsc_parse_page(dsc) != 0) + return CDSC_ERROR; + + return CDSC_OK; + } + else if (IS_DSC(line, "%%BeginPreview")) { + /* ignore because we have already processed this section */ + } + else if (IS_DSC(line, "%%BeginDefaults")) { + /* ignore because we have already processed this section */ + } + else if (IS_DSC(line, "%%BeginProlog")) { + /* ignore because we have already processed this section */ + } + else if (IS_DSC(line, "%%BeginSetup")) { + /* ignore because we have already processed this section */ + } + else if (dsc_is_section(line)) { + if (IS_DSC(line, "%%Trailer")) { + dsc->page[dsc->page_count-1].end = DSC_START(dsc); + if (dsc->file_length) { + if ((!dsc->doseps && + ((DSC_END(dsc) + 32768) < dsc->file_length)) || + ((dsc->doseps) && + ((DSC_END(dsc) + 32768) < dsc->doseps_end))) { + int rc = dsc_error(dsc, CDSC_MESSAGE_EARLY_TRAILER, + dsc->line, dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + /* ignore early trailer */ + break; + case CDSC_RESPONSE_CANCEL: + /* this is the trailer */ + dsc->scan_section = scan_pre_trailer; + if (dsc_check_match(dsc)) + return CDSC_NOTDSC; + return CDSC_PROPAGATE; + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + else { + dsc->scan_section = scan_pre_trailer; + if (dsc_check_match(dsc)) + return CDSC_NOTDSC; + return CDSC_PROPAGATE; + } + } + else { + dsc->scan_section = scan_pre_trailer; + if (dsc_check_match(dsc)) + return CDSC_NOTDSC; + return CDSC_PROPAGATE; + } + } + else if (IS_DSC(line, "%%EOF")) { + dsc->page[dsc->page_count-1].end = DSC_START(dsc); + if (dsc->file_length) { + if ((DSC_END(dsc)+100 < dsc->file_length) || + (dsc->doseps && (DSC_END(dsc) + 100 < dsc->doseps_end))) { + int rc = dsc_error(dsc, CDSC_MESSAGE_EARLY_EOF, + dsc->line, dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + /* %%EOF is wrong, ignore it */ + break; + case CDSC_RESPONSE_CANCEL: + /* %%EOF is correct */ + dsc->scan_section = scan_eof; + dsc->eof = TRUE; + if (dsc_check_match(dsc)) + return CDSC_NOTDSC; + return CDSC_PROPAGATE; + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + } + else { + /* ignore it */ + if (dsc_check_match(dsc)) + return CDSC_NOTDSC; + return CDSC_OK; + } + } + else { + /* Section comment, probably from a badly */ + /* encapsulated EPS file. */ + int rc = dsc_error(dsc, CDSC_MESSAGE_BAD_SECTION, + dsc->line, dsc->line_length); + if (rc == CDSC_RESPONSE_IGNORE_ALL) + return CDSC_NOTDSC; + } + } + else if (IS_DSC(line, "%%PageTrailer")) { + dsc->id = CDSC_PAGETRAILER; + /* ignore */ + } + else if (IS_DSC(line, "%%BeginPageSetup")) { + dsc->id = CDSC_BEGINPAGESETUP; + /* ignore */ + } + else if (IS_DSC(line, "%%EndPageSetup")) { + dsc->id = CDSC_ENDPAGESETUP; + /* ignore */ + } + else if (IS_DSC(line, "%%PageMedia:")) { + dsc->id = CDSC_PAGEMEDIA; + dsc_parse_media(dsc, &(dsc->page[dsc->page_count-1].media)); + } + else if (IS_DSC(line, "%%PaperColor:")) { + dsc->id = CDSC_PAPERCOLOR; + /* ignore */ + } + else if (IS_DSC(line, "%%PaperForm:")) { + dsc->id = CDSC_PAPERFORM; + /* ignore */ + } + else if (IS_DSC(line, "%%PaperWeight:")) { + dsc->id = CDSC_PAPERWEIGHT; + /* ignore */ + } + else if (IS_DSC(line, "%%PaperSize:")) { + /* DSC 2.1 */ + GSBOOL found_media = FALSE; + int i; + int n = 12; + char buf[MAXSTR]; + buf[0] = '\0'; + dsc_copy_string(buf, sizeof(buf)-1, dsc->line+n, + dsc->line_length-n, NULL); + for (i=0; i<(int)dsc->media_count; i++) { + if (dsc->media[i] && dsc->media[i]->name && + (dsc_stricmp(buf, dsc->media[i]->name)==0)) { + dsc->page_media = dsc->media[i]; + found_media = TRUE; + break; + } + } + if (!found_media) { + /* It didn't match %%DocumentPaperSizes: */ + /* Try our known media */ + const CDSCMEDIA *m = dsc_known_media; + while (m->name) { + if (dsc_stricmp(buf, m->name)==0) { + dsc->page[dsc->page_count-1].media = m; + break; + } + m++; + } + if (m->name == NULL) + dsc_unknown(dsc); + } + } + else if (IS_DSC(line, "%%PageOrientation:")) { + dsc->id = CDSC_PAGEORIENTATION; + if (dsc_parse_orientation(dsc, + &(dsc->page[dsc->page_count-1].orientation) ,18)) + return CDSC_NOTDSC; + } + else if (IS_DSC(line, "%%PageBoundingBox:")) { + dsc->id = CDSC_PAGEBOUNDINGBOX; + if (dsc_parse_bounding_box(dsc, &dsc->page[dsc->page_count-1].bbox, 18)) + return CDSC_NOTDSC; + } + else if (IS_DSC(line, "%%ViewingOrientation:")) { + dsc->id = CDSC_VIEWINGORIENTATION; + if (dsc_parse_viewing_orientation(dsc, + &dsc->page[dsc->page_count-1].viewing_orientation)) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%BeginFont:")) { + dsc->id = CDSC_BEGINFONT; + /* ignore Begin/EndFont, apart form making sure */ + /* that they are matched. */ + dsc->begin_font_count++; + } + else if (IS_DSC(line, "%%EndFont")) { + dsc->id = CDSC_BEGINFONT; + dsc->begin_font_count--; + } + else if (IS_DSC(line, "%%BeginFeature:")) { + dsc->id = CDSC_BEGINFEATURE; + /* ignore Begin/EndFeature, apart form making sure */ + /* that they are matched. */ + dsc->begin_feature_count++; + } + else if (IS_DSC(line, "%%EndFeature")) { + dsc->id = CDSC_ENDFEATURE; + dsc->begin_feature_count--; + } + else if (IS_DSC(line, "%%BeginResource:")) { + dsc->id = CDSC_BEGINRESOURCE; + /* ignore Begin/EndResource, apart form making sure */ + /* that they are matched. */ + dsc->begin_resource_count++; + } + else if (IS_DSC(line, "%%EndResource")) { + dsc->id = CDSC_ENDRESOURCE; + dsc->begin_resource_count--; + } + else if (IS_DSC(line, "%%BeginProcSet:")) { + dsc->id = CDSC_BEGINPROCSET; + /* ignore Begin/EndProcSet, apart form making sure */ + /* that they are matched. */ + dsc->begin_procset_count++; + } + else if (IS_DSC(line, "%%EndProcSet")) { + dsc->id = CDSC_ENDPROCSET; + dsc->begin_procset_count--; + } + else if (IS_DSC(line, "%%IncludeFont:")) { + dsc->id = CDSC_INCLUDEFONT; + /* ignore */ + } + else { + /* All other DSC comments are unknown, but not an error */ + dsc->id = CDSC_UNKNOWNDSC; + dsc_unknown(dsc); + } + + dsc->page[dsc->page_count-1].end = DSC_END(dsc); + return CDSC_OK; +} + +/* Valid Trailer comments are + * %%Trailer + * %%EOF + * or the following deferred with (atend) + * %%BoundingBox: + * %%DocumentCustomColors: + * %%DocumentFiles: + * %%DocumentFonts: + * %%DocumentNeededFiles: + * %%DocumentNeededFonts: + * %%DocumentNeededProcSets: + * %%DocumentNeededResources: + * %%DocumentProcSets: + * %%DocumentProcessColors: + * %%DocumentSuppliedFiles: + * %%DocumentSuppliedFonts: + * %%DocumentSuppliedProcSets: + * %%DocumentSuppliedResources: + * %%Orientation: + * %%Pages: + * %%PageOrder: + * + * Our supported subset is + * %%Trailer + * %%EOF + * %%BoundingBox: + * %%Orientation: + * %%Pages: + * %%PageOrder: + * In addition to these, we support + * %%DocumentMedia: + * + * A %%PageTrailer can have the following: + * %%PageBoundingBox: + * %%PageCustomColors: + * %%PageFiles: + * %%PageFonts: + * %%PageOrientation: + * %%PageProcessColors: + * %%PageResources: + */ + +dsc_private int +dsc_scan_trailer(CDSC *dsc) +{ + /* Trailer section start at */ + /* %%Trailer */ + /* and ends at */ + /* %%EOF */ + char *line = dsc->line; + GSBOOL continued = FALSE; + dsc->id = CDSC_OK; + + if (dsc->scan_section == scan_pre_trailer) { + if (IS_DSC(line, "%%Trailer")) { + dsc->id = CDSC_TRAILER; + dsc->begintrailer = DSC_START(dsc); + dsc->endtrailer = DSC_END(dsc); + dsc->scan_section = scan_trailer; + return CDSC_OK; + } + else if (IS_DSC(line, "%%EOF")) { + dsc->id = CDSC_EOF; + dsc->begintrailer = DSC_START(dsc); + dsc->endtrailer = DSC_END(dsc); + dsc->scan_section = scan_trailer; + /* Continue, in case we found %%EOF in an embedded document */ + return CDSC_OK; + } + else { + /* %%Page: didn't follow %%EndSetup + * Keep reading until reach %%Page or %%Trailer + * and add it to setup section + */ + /* append to previous section */ + if (dsc->beginsetup) + dsc->endsetup = DSC_END(dsc); + else if (dsc->beginprolog) + dsc->endprolog = DSC_END(dsc); + else { + /* horribly confused */ + } + return CDSC_OK; + } + } + + /* Handle continuation lines. + * See comment above about our restrictive processing of + * continuation lines + */ + if (IS_DSC(line, "%%+")) { + line = dsc->last_line; + continued = TRUE; + } + else + dsc_save_line(dsc); + + if (NOT_DSC_LINE(line)) { + /* ignore */ + } + else if (IS_DSC(dsc->line, "%%EOF")) { + /* Keep scanning, in case we have a false trailer */ + dsc->id = CDSC_EOF; + } + else if (IS_DSC(dsc->line, "%%Trailer")) { + /* Cope with no pages with code after setup and before trailer. */ + /* Last trailer is the correct one. */ + dsc->id = CDSC_TRAILER; + dsc->begintrailer = DSC_START(dsc); + } + else if (IS_DSC(line, "%%Pages:")) { + dsc->id = CDSC_PAGES; + if (dsc_parse_pages(dsc) != 0) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%BoundingBox:")) { + dsc->id = CDSC_BOUNDINGBOX; + if (dsc_parse_bounding_box(dsc, &(dsc->bbox), continued ? 3 : 14)) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%HiResBoundingBox:")) { + dsc->id = CDSC_HIRESBOUNDINGBOX; + if (dsc_parse_float_bounding_box(dsc, &(dsc->hires_bbox), + continued ? 3 : 19)) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%CropBox:")) { + dsc->id = CDSC_CROPBOX; + if (dsc_parse_float_bounding_box(dsc, &(dsc->crop_box), + continued ? 3 : 10)) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%Orientation:")) { + dsc->id = CDSC_ORIENTATION; + if (dsc_parse_orientation(dsc, &(dsc->page_orientation), continued ? 3 : 14)) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%PageOrder:")) { + dsc->id = CDSC_PAGEORDER; + if (dsc_parse_order(dsc)) + return CDSC_ERROR; + } + else if (IS_DSC(line, "%%DocumentMedia:")) { + dsc->id = CDSC_DOCUMENTMEDIA; + if (dsc_parse_document_media(dsc)) + return CDSC_ERROR; + } + else if (IS_DSC(dsc->line, "%%Page:")) { + /* This should not occur in the trailer, but we might see + * this if a document has been incorrectly embedded. + */ + int rc = dsc_error(dsc, CDSC_MESSAGE_PAGE_IN_TRAILER, + dsc->line, dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + /* Assume that we are really in the previous */ + /* page, not the trailer */ + dsc->scan_section = scan_pre_pages; + if (dsc->page_count) + dsc->page[dsc->page_count-1].end = DSC_START(dsc); + return CDSC_PROPAGATE; /* try again */ + case CDSC_RESPONSE_CANCEL: + /* ignore pages in trailer */ + break; + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + else if (IS_DSC(line, "%%DocumentNeededFonts:")) { + dsc->id = CDSC_DOCUMENTNEEDEDFONTS; + /* ignore */ + } + else if (IS_DSC(line, "%%DocumentSuppliedFonts:")) { + dsc->id = CDSC_DOCUMENTSUPPLIEDFONTS; + /* ignore */ + } + else { + /* All other DSC comments are unknown, but not an error */ + dsc->id = CDSC_UNKNOWNDSC; + dsc_unknown(dsc); + } + + dsc->endtrailer = DSC_END(dsc); + return CDSC_OK; +} + + +dsc_private char * +dsc_alloc_string(CDSC *dsc, const char *str, int len) +{ + char *p; + if (dsc->string_head == NULL) { + dsc->string_head = (CDSCSTRING *)dsc_memalloc(dsc, sizeof(CDSCSTRING)); + if (dsc->string_head == NULL) + return NULL; /* no memory */ + dsc->string = dsc->string_head; + dsc->string->next = NULL; + dsc->string->data = (char *)dsc_memalloc(dsc, CDSC_STRING_CHUNK); + if (dsc->string->data == NULL) { + dsc_reset(dsc); + return NULL; /* no memory */ + } + dsc->string->index = 0; + dsc->string->length = CDSC_STRING_CHUNK; + } + if ( dsc->string->index + len + 1 > dsc->string->length) { + /* allocate another string block */ + CDSCSTRING *newstring = (CDSCSTRING *)dsc_memalloc(dsc, sizeof(CDSCSTRING)); + if (newstring == NULL) { + dsc_debug_print(dsc, "Out of memory\n"); + return NULL; + } + newstring->next = NULL; + newstring->length = 0; + newstring->index = 0; + newstring->data = (char *)dsc_memalloc(dsc, CDSC_STRING_CHUNK); + if (newstring->data == NULL) { + dsc_memfree(dsc, newstring); + dsc_debug_print(dsc, "Out of memory\n"); + return NULL; /* no memory */ + } + newstring->length = CDSC_STRING_CHUNK; + dsc->string->next = newstring; + dsc->string = newstring; + } + if ( dsc->string->index + len + 1 > dsc->string->length) + return NULL; /* failed */ + p = dsc->string->data + dsc->string->index; + memcpy(p, str, len); + *(p+len) = '\0'; + dsc->string->index += len + 1; + return p; +} + +/* store line, ignoring leading spaces */ +dsc_private char * +dsc_add_line(CDSC *dsc, const char *line, unsigned int len) +{ + char *newline; + unsigned int i; + while (len && (IS_WHITE(*line))) { + len--; + line++; + } + newline = dsc_alloc_string(dsc, line, len); + if (newline == NULL) + return NULL; + + for (i=0; i<len; i++) { + if (newline[i] == '\r') { + newline[i]='\0'; + break; + } + if (newline[i] == '\n') { + newline[i]='\0'; + break; + } + } + return newline; +} + + +/* Copy string on line to new allocated string str */ +/* String is always null terminated */ +/* String is no longer than len */ +/* Return pointer to string */ +/* Store number of used characters from line */ +/* Don't copy enclosing () */ +dsc_private char * +dsc_copy_string(char *str, unsigned int slen, char *line, + unsigned int len, unsigned int *offset) +{ + int quoted = FALSE; + int instring=0; + unsigned int newlength = 0; + unsigned int i = 0; + unsigned char ch; + if (len > slen) + len = slen-1; + while ( (i<len) && IS_WHITE(line[i])) + i++; /* skip leading spaces */ + if (line[i]=='(') { + quoted = TRUE; + instring++; + i++; /* don't copy outside () */ + } + while (i < len) { + str[newlength] = ch = line[i]; + i++; + if (quoted) { + if (ch == '(') + instring++; + if (ch == ')') + instring--; + if (instring==0) + break; + } + else if (ch == ' ') + break; + + if (ch == '\r') + break; + if (ch == '\n') + break; + else if ( (ch == '\\') && (i+1 < len) ) { + ch = line[i]; + if ((ch >= '0') && (ch <= '9')) { + /* octal coded character */ + int j = 3; + ch = 0; + while (j && (i < len) && line[i]>='0' && line[i]<='7') { + ch = (unsigned char)((ch<<3) + (line[i]-'0')); + i++; + j--; + } + str[newlength] = ch; + } + else if (ch == '(') { + str[newlength] = ch; + i++; + } + else if (ch == ')') { + str[newlength] = ch; + i++; + } + else if (ch == 'b') { + str[newlength] = '\b'; + i++; + } + else if (ch == 'f') { + str[newlength] = '\b'; + i++; + } + else if (ch == 'n') { + str[newlength] = '\n'; + i++; + } + else if (ch == 'r') { + str[newlength] = '\r'; + i++; + } + else if (ch == 't') { + str[newlength] = '\t'; + i++; + } + else if (ch == '\\') { + str[newlength] = '\\'; + i++; + } + } + newlength++; + } + str[newlength] = '\0'; + if (offset != (unsigned int *)NULL) + *offset = i; + return str; +} + +dsc_private int +dsc_get_int(const char *line, unsigned int len, unsigned int *offset) +{ + char newline[MAXSTR]; + int newlength = 0; + unsigned int i = 0; + unsigned char ch; + + len = min((size_t) len, (size_t) sizeof(newline)-1); + while ((i<len) && IS_WHITE(line[i])) + i++; /* skip leading spaces */ + while (i < len) { + newline[newlength] = ch = line[i]; + if (!(isdigit(ch) || (ch=='-') || (ch=='+'))) + break; /* not part of an integer number */ + i++; + newlength++; + } + while ((i<len) && IS_WHITE(line[i])) + i++; /* skip trailing spaces */ + newline[newlength] = '\0'; + if (offset != (unsigned int *)NULL) + *offset = i; + return atoi(newline); +} + +dsc_private float +dsc_get_real(const char *line, unsigned int len, unsigned int *offset) +{ + char newline[MAXSTR]; + int newlength = 0; + unsigned int i = 0; + unsigned char ch; + + len = min((size_t) len, (size_t) sizeof(newline)-1); + while ((i<len) && IS_WHITE(line[i])) + i++; /* skip leading spaces */ + while (i < len) { + newline[newlength] = ch = line[i]; + if (!(isdigit(ch) || (ch=='.') || (ch=='-') || (ch=='+') + || (ch=='e') || (ch=='E'))) + break; /* not part of a real number */ + i++; + newlength++; + } + while ((i<len) && IS_WHITE(line[i])) + i++; /* skip trailing spaces */ + + newline[newlength] = '\0'; + + if (offset != (unsigned int *)NULL) + *offset = i; + return (float)atof(newline); +} + +dsc_private int +dsc_stricmp(const char *s, const char *t) +{ + while (toupper(*s) == toupper(*t)) { + if (*s == '\0') + return 0; + s++; + t++; + } + return (toupper(*s) - toupper(*t)); +} + + +dsc_private int +dsc_parse_page(CDSC *dsc) +{ + char *p; + unsigned int i; + char page_label[MAXSTR]; + char *pl; + int page_ordinal; + int page_number; + + p = dsc->line + 7; + pl = dsc_copy_string(page_label, sizeof(page_label)-1, p, dsc->line_length-7, &i); + if (pl == NULL) + return CDSC_ERROR; + p += i; + page_ordinal = atoi(p); + + if ( (page_ordinal == 0) || (strlen(page_label) == 0) || + (dsc->page_count && + (page_ordinal != dsc->page[dsc->page_count-1].ordinal+1)) ) { + int rc = dsc_error(dsc, CDSC_MESSAGE_PAGE_ORDINAL, dsc->line, + dsc->line_length); + switch (rc) { + case CDSC_RESPONSE_OK: + /* ignore this page */ + return CDSC_OK; + case CDSC_RESPONSE_CANCEL: + /* accept the page */ + break; + case CDSC_RESPONSE_IGNORE_ALL: + return CDSC_NOTDSC; + } + } + + page_number = dsc->page_count; + dsc_add_page(dsc, page_ordinal, page_label); + dsc->page[page_number].begin = DSC_START(dsc); + dsc->page[page_number].end = DSC_START(dsc); + + if (dsc->page[page_number].label == NULL) + return CDSC_ERROR; /* no memory */ + + return CDSC_OK; +} + + + +/* DSC error reporting */ + +void +dsc_debug_print(CDSC *dsc, const char *str) +{ + if (dsc->debug_print_fn) + dsc->debug_print_fn(dsc->caller_data, str); +} + + +/* Display a message about a problem with the DSC comments. + * + * explanation = an index to to a multiline explanation in dsc_message[] + * line = pointer to the offending DSC line (if any) + * return code = + * CDSC_RESPONSE_OK DSC was wrong, make a guess about what + * was really meant. + * CDSC_RESPONSE_CANCEL Assume DSC was correct, ignore if it + * is misplaced. + * CDSC_RESPONSE_IGNORE_ALL Ignore all DSC. + */ +/* Silent operation. Don't display errors. */ +dsc_private int +dsc_error(CDSC *dsc, unsigned int explanation, + char *line, unsigned int line_len) +{ + /* if error function provided, use it */ + if (dsc->dsc_error_fn) + return dsc->dsc_error_fn(dsc->caller_data, dsc, + explanation, line, line_len); + + /* treat DSC as being correct */ + return CDSC_RESPONSE_CANCEL; +} + + +// vim:sw=4:sts=4:ts=8:noet |