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Diffstat (limited to 'src/LexCsound.cpp')
| -rw-r--r-- | src/LexCsound.cpp | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/src/LexCsound.cpp b/src/LexCsound.cpp new file mode 100644 index 0000000..27f7b99 --- /dev/null +++ b/src/LexCsound.cpp @@ -0,0 +1,207 @@ +// Scintilla source code edit control +/** @file LexCsound.cxx + ** Lexer for Csound (Orchestra & Score) + ** Written by Georg Ritter - <ritterfuture A T gmail D O T com> + **/ +// Copyright 1998-2003 by Neil Hodgson <neilh@scintilla.org> +// The License.txt file describes the conditions under which this software may be distributed. + +#include <stdlib.h> +#include <string.h> +#include <ctype.h> +#include <stdio.h> +#include <stdarg.h> +#include "Platform.h" + +#include "PropSet.h" +#include "Accessor.h" +#include "StyleContext.h" +#include "KeyWords.h" +#include "Scintilla.h" +#include "SciLexer.h" + + +static inline bool IsAWordChar(const int ch) { + return (ch < 0x80) && (isalnum(ch) || ch == '.' || + ch == '_' || ch == '?'); +} + +static inline bool IsAWordStart(const int ch) { + return (ch < 0x80) && (isalnum(ch) || ch == '_' || ch == '.' || + ch == '%' || ch == '@' || ch == '$' || ch == '?'); +} + +static inline bool IsCsoundOperator(char ch) { + if (isalnum(ch)) + return false; + // '.' left out as it is used to make up numbers + if (ch == '*' || ch == '/' || ch == '-' || ch == '+' || + ch == '(' || ch == ')' || ch == '=' || ch == '^' || + ch == '[' || ch == ']' || ch == '<' || ch == '&' || + ch == '>' || ch == ',' || ch == '|' || ch == '~' || + ch == '%' || ch == ':') + return true; + return false; +} + +static void ColouriseCsoundDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[], + Accessor &styler) { + + WordList &opcode = *keywordlists[0]; + WordList &headerStmt = *keywordlists[1]; + WordList &otherKeyword = *keywordlists[2]; + + // Do not leak onto next line + if (initStyle == SCE_CSOUND_STRINGEOL) + initStyle = SCE_CSOUND_DEFAULT; + + StyleContext sc(startPos, length, initStyle, styler); + + for (; sc.More(); sc.Forward()) + { + // Handle line continuation generically. + if (sc.ch == '\\') { + if (sc.chNext == '\n' || sc.chNext == '\r') { + sc.Forward(); + if (sc.ch == '\r' && sc.chNext == '\n') { + sc.Forward(); + } + continue; + } + } + + // Determine if the current state should terminate. + if (sc.state == SCE_CSOUND_OPERATOR) { + if (!IsCsoundOperator(static_cast<char>(sc.ch))) { + sc.SetState(SCE_CSOUND_DEFAULT); + } + }else if (sc.state == SCE_CSOUND_NUMBER) { + if (!IsAWordChar(sc.ch)) { + sc.SetState(SCE_CSOUND_DEFAULT); + } + } else if (sc.state == SCE_CSOUND_IDENTIFIER) { + if (!IsAWordChar(sc.ch) ) { + char s[100]; + sc.GetCurrent(s, sizeof(s)); + + if (opcode.InList(s)) { + sc.ChangeState(SCE_CSOUND_OPCODE); + } else if (headerStmt.InList(s)) { + sc.ChangeState(SCE_CSOUND_HEADERSTMT); + } else if (otherKeyword.InList(s)) { + sc.ChangeState(SCE_CSOUND_USERKEYWORD); + } else if (s[0] == 'p') { + sc.ChangeState(SCE_CSOUND_PARAM); + } else if (s[0] == 'a') { + sc.ChangeState(SCE_CSOUND_ARATE_VAR); + } else if (s[0] == 'k') { + sc.ChangeState(SCE_CSOUND_KRATE_VAR); + } else if (s[0] == 'i') { // covers both i-rate variables and i-statements + sc.ChangeState(SCE_CSOUND_IRATE_VAR); + } else if (s[0] == 'g') { + sc.ChangeState(SCE_CSOUND_GLOBAL_VAR); + } + sc.SetState(SCE_CSOUND_DEFAULT); + } + } + else if (sc.state == SCE_CSOUND_COMMENT ) { + if (sc.atLineEnd) { + sc.SetState(SCE_CSOUND_DEFAULT); + } + } + else if ((sc.state == SCE_CSOUND_ARATE_VAR) || + (sc.state == SCE_CSOUND_KRATE_VAR) || + (sc.state == SCE_CSOUND_IRATE_VAR)) { + if (!IsAWordChar(sc.ch)) { + sc.SetState(SCE_CSOUND_DEFAULT); + } + } + + // Determine if a new state should be entered. + if (sc.state == SCE_CSOUND_DEFAULT) { + if (sc.ch == ';'){ + sc.SetState(SCE_CSOUND_COMMENT); + } else if (isdigit(sc.ch) || (sc.ch == '.' && isdigit(sc.chNext))) { + sc.SetState(SCE_CSOUND_NUMBER); + } else if (IsAWordStart(sc.ch)) { + sc.SetState(SCE_CSOUND_IDENTIFIER); + } else if (IsCsoundOperator(static_cast<char>(sc.ch))) { + sc.SetState(SCE_CSOUND_OPERATOR); + } else if (sc.ch == 'p') { + sc.SetState(SCE_CSOUND_PARAM); + } else if (sc.ch == 'a') { + sc.SetState(SCE_CSOUND_ARATE_VAR); + } else if (sc.ch == 'k') { + sc.SetState(SCE_CSOUND_KRATE_VAR); + } else if (sc.ch == 'i') { // covers both i-rate variables and i-statements + sc.SetState(SCE_CSOUND_IRATE_VAR); + } else if (sc.ch == 'g') { + sc.SetState(SCE_CSOUND_GLOBAL_VAR); + } + } + } + sc.Complete(); +} + +static void FoldCsoundInstruments(unsigned int startPos, int length, int /* initStyle */, WordList *[], + Accessor &styler) { + unsigned int lengthDoc = startPos + length; + int visibleChars = 0; + int lineCurrent = styler.GetLine(startPos); + int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK; + int levelCurrent = levelPrev; + char chNext = styler[startPos]; + int stylePrev = 0; + int styleNext = styler.StyleAt(startPos); + for (unsigned int i = startPos; i < lengthDoc; i++) { + char ch = chNext; + chNext = styler.SafeGetCharAt(i + 1); + int style = styleNext; + styleNext = styler.StyleAt(i + 1); + bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n'); + if ((stylePrev != SCE_CSOUND_OPCODE) && (style == SCE_CSOUND_OPCODE)) { + char s[20]; + unsigned int j = 0; + while ((j < (sizeof(s) - 1)) && (iswordchar(styler[i + j]))) { + s[j] = styler[i + j]; + j++; + } + s[j] = '\0'; + + if (strcmp(s, "instr") == 0) + levelCurrent++; + if (strcmp(s, "endin") == 0) + levelCurrent--; + } + + if (atEOL) { + int lev = levelPrev; + if (visibleChars == 0) + lev |= SC_FOLDLEVELWHITEFLAG; + if ((levelCurrent > levelPrev) && (visibleChars > 0)) + lev |= SC_FOLDLEVELHEADERFLAG; + if (lev != styler.LevelAt(lineCurrent)) { + styler.SetLevel(lineCurrent, lev); + } + lineCurrent++; + levelPrev = levelCurrent; + visibleChars = 0; + } + if (!isspacechar(ch)) + visibleChars++; + stylePrev = style; + } + // Fill in the real level of the next line, keeping the current flags as they will be filled in later + int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK; + styler.SetLevel(lineCurrent, levelPrev | flagsNext); +} + + +static const char * const csoundWordListDesc[] = { + "Opcodes", + "Header Statements", + "User keywords", + 0 +}; + +LexerModule lmCsound(SCLEX_CSOUND, ColouriseCsoundDoc, "csound", FoldCsoundInstruments, csoundWordListDesc); 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