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-rwxr-xr-xsrc/LexVerilog.cpp299
1 files changed, 299 insertions, 0 deletions
diff --git a/src/LexVerilog.cpp b/src/LexVerilog.cpp
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--- /dev/null
+++ b/src/LexVerilog.cpp
@@ -0,0 +1,299 @@
+// Scintilla source code edit control
+/** @file LexVerilog.cxx
+ ** Lexer for Verilog.
+ ** Written by Avi Yegudin, based on C++ lexer by Neil Hodgson
+ **/
+// Copyright 1998-2002 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 == '$');
+}
+
+static void ColouriseVerilogDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
+ Accessor &styler) {
+
+ WordList &keywords = *keywordlists[0];
+ WordList &keywords2 = *keywordlists[1];
+ WordList &keywords3 = *keywordlists[2];
+ WordList &keywords4 = *keywordlists[3];
+
+ // Do not leak onto next line
+ if (initStyle == SCE_V_STRINGEOL)
+ initStyle = SCE_V_DEFAULT;
+
+ StyleContext sc(startPos, length, initStyle, styler);
+
+ for (; sc.More(); sc.Forward()) {
+
+ if (sc.atLineStart && (sc.state == SCE_V_STRING)) {
+ // Prevent SCE_V_STRINGEOL from leaking back to previous line
+ sc.SetState(SCE_V_STRING);
+ }
+
+ // 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_V_OPERATOR) {
+ sc.SetState(SCE_V_DEFAULT);
+ } else if (sc.state == SCE_V_NUMBER) {
+ if (!IsAWordChar(sc.ch)) {
+ sc.SetState(SCE_V_DEFAULT);
+ }
+ } else if (sc.state == SCE_V_IDENTIFIER) {
+ if (!IsAWordChar(sc.ch) || (sc.ch == '.')) {
+ char s[100];
+ sc.GetCurrent(s, sizeof(s));
+ if (keywords.InList(s)) {
+ sc.ChangeState(SCE_V_WORD);
+ } else if (keywords2.InList(s)) {
+ sc.ChangeState(SCE_V_WORD2);
+ } else if (keywords3.InList(s)) {
+ sc.ChangeState(SCE_V_WORD3);
+ } else if (keywords4.InList(s)) {
+ sc.ChangeState(SCE_V_USER);
+ }
+ sc.SetState(SCE_V_DEFAULT);
+ }
+ } else if (sc.state == SCE_V_PREPROCESSOR) {
+ if (!IsAWordChar(sc.ch)) {
+ sc.SetState(SCE_V_DEFAULT);
+ }
+ } else if (sc.state == SCE_V_COMMENT) {
+ if (sc.Match('*', '/')) {
+ sc.Forward();
+ sc.ForwardSetState(SCE_V_DEFAULT);
+ }
+ } else if (sc.state == SCE_V_COMMENTLINE || sc.state == SCE_V_COMMENTLINEBANG) {
+ if (sc.atLineEnd) {
+ sc.SetState(SCE_V_DEFAULT);
+ }
+ } else if (sc.state == SCE_V_STRING) {
+ if (sc.ch == '\\') {
+ if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
+ sc.Forward();
+ }
+ } else if (sc.ch == '\"') {
+ sc.ForwardSetState(SCE_V_DEFAULT);
+ } else if (sc.atLineEnd) {
+ sc.ChangeState(SCE_V_STRINGEOL);
+ sc.ForwardSetState(SCE_V_DEFAULT);
+ }
+ }
+
+ // Determine if a new state should be entered.
+ if (sc.state == SCE_V_DEFAULT) {
+ if (IsADigit(sc.ch) || (sc.ch == '\'') || (sc.ch == '.' && IsADigit(sc.chNext))) {
+ sc.SetState(SCE_V_NUMBER);
+ } else if (IsAWordStart(sc.ch)) {
+ sc.SetState(SCE_V_IDENTIFIER);
+ } else if (sc.Match('/', '*')) {
+ sc.SetState(SCE_V_COMMENT);
+ sc.Forward(); // Eat the * so it isn't used for the end of the comment
+ } else if (sc.Match('/', '/')) {
+ if (sc.Match("//!")) // Nice to have a different comment style
+ sc.SetState(SCE_V_COMMENTLINEBANG);
+ else
+ sc.SetState(SCE_V_COMMENTLINE);
+ } else if (sc.ch == '\"') {
+ sc.SetState(SCE_V_STRING);
+ } else if (sc.ch == '`') {
+ sc.SetState(SCE_V_PREPROCESSOR);
+ // Skip whitespace between ` and preprocessor word
+ do {
+ sc.Forward();
+ } while ((sc.ch == ' ' || sc.ch == '\t') && sc.More());
+ if (sc.atLineEnd) {
+ sc.SetState(SCE_V_DEFAULT);
+ }
+ } else if (isoperator(static_cast<char>(sc.ch)) || sc.ch == '@' || sc.ch == '#') {
+ sc.SetState(SCE_V_OPERATOR);
+ }
+ }
+ }
+ sc.Complete();
+}
+
+static bool IsStreamCommentStyle(int style) {
+ return style == SCE_V_COMMENT;
+}
+
+// Store both the current line's fold level and the next lines in the
+// level store to make it easy to pick up with each increment
+// and to make it possible to fiddle the current level for "} else {".
+static void FoldNoBoxVerilogDoc(unsigned int startPos, int length, int initStyle,
+ Accessor &styler) {
+ bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
+ bool foldPreprocessor = styler.GetPropertyInt("fold.preprocessor") != 0;
+ bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
+ bool foldAtElse = styler.GetPropertyInt("fold.at.else", 0) != 0;
+ // Verilog specific folding options:
+ // fold_at_module -
+ // Generally used methodology in verilog code is
+ // one module per file, so folding at module definition is useless.
+ // fold_at_brace/parenthese -
+ // Folding of long port lists can be convenient.
+ bool foldAtModule = styler.GetPropertyInt("fold.verilog.flags", 0) != 0;
+ bool foldAtBrace = 1;
+ bool foldAtParenthese = 1;
+
+ unsigned int endPos = startPos + length;
+ int visibleChars = 0;
+ int lineCurrent = styler.GetLine(startPos);
+ int levelCurrent = SC_FOLDLEVELBASE;
+ if (lineCurrent > 0)
+ levelCurrent = styler.LevelAt(lineCurrent-1) >> 16;
+ int levelMinCurrent = levelCurrent;
+ int levelNext = levelCurrent;
+ char chNext = styler[startPos];
+ int styleNext = styler.StyleAt(startPos);
+ int style = initStyle;
+ for (unsigned int i = startPos; i < endPos; i++) {
+ char ch = chNext;
+ chNext = styler.SafeGetCharAt(i + 1);
+ int stylePrev = style;
+ style = styleNext;
+ styleNext = styler.StyleAt(i + 1);
+ bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
+ if (foldComment && IsStreamCommentStyle(style)) {
+ if (!IsStreamCommentStyle(stylePrev)) {
+ levelNext++;
+ } else if (!IsStreamCommentStyle(styleNext) && !atEOL) {
+ // Comments don't end at end of line and the next character may be unstyled.
+ levelNext--;
+ }
+ }
+ if (foldComment && (style == SCE_V_COMMENTLINE)) {
+ if ((ch == '/') && (chNext == '/')) {
+ char chNext2 = styler.SafeGetCharAt(i + 2);
+ if (chNext2 == '{') {
+ levelNext++;
+ } else if (chNext2 == '}') {
+ levelNext--;
+ }
+ }
+ }
+ if (foldPreprocessor && (style == SCE_V_PREPROCESSOR)) {
+ if (ch == '`') {
+ unsigned int j = i + 1;
+ while ((j < endPos) && IsASpaceOrTab(styler.SafeGetCharAt(j))) {
+ j++;
+ }
+ if (styler.Match(j, "if")) {
+ levelNext++;
+ } else if (styler.Match(j, "end")) {
+ levelNext--;
+ }
+ }
+ }
+ if (style == SCE_V_OPERATOR) {
+ if (foldAtParenthese) {
+ if (ch == '(') {
+ levelNext++;
+ } else if (ch == ')') {
+ levelNext--;
+ }
+ }
+ }
+ if (style == SCE_V_OPERATOR) {
+ if (foldAtBrace) {
+ if (ch == '{') {
+ levelNext++;
+ } else if (ch == '}') {
+ levelNext--;
+ }
+ }
+ }
+ if (style == SCE_V_WORD && stylePrev != SCE_V_WORD) {
+ unsigned int j = i;
+ if (styler.Match(j, "case") ||
+ styler.Match(j, "casex") ||
+ styler.Match(j, "casez") ||
+ styler.Match(j, "function") ||
+ styler.Match(j, "fork") ||
+ styler.Match(j, "table") ||
+ styler.Match(j, "task") ||
+ styler.Match(j, "specify") ||
+ styler.Match(j, "primitive") ||
+ styler.Match(j, "module") && foldAtModule ||
+ styler.Match(j, "begin")) {
+ levelNext++;
+ } else if (styler.Match(j, "endcase") ||
+ styler.Match(j, "endfunction") ||
+ styler.Match(j, "join") ||
+ styler.Match(j, "endtask") ||
+ styler.Match(j, "endtable") ||
+ styler.Match(j, "endspecify") ||
+ styler.Match(j, "endprimitive") ||
+ styler.Match(j, "endmodule") && foldAtModule ||
+ styler.Match(j, "end") && !IsAWordChar(styler.SafeGetCharAt(j+3))) {
+ levelNext--;
+ }
+ }
+ if (atEOL) {
+ int levelUse = levelCurrent;
+ if (foldAtElse) {
+ levelUse = levelMinCurrent;
+ }
+ int lev = levelUse | levelNext << 16;
+ if (visibleChars == 0 && foldCompact)
+ lev |= SC_FOLDLEVELWHITEFLAG;
+ if (levelUse < levelNext)
+ lev |= SC_FOLDLEVELHEADERFLAG;
+ if (lev != styler.LevelAt(lineCurrent)) {
+ styler.SetLevel(lineCurrent, lev);
+ }
+ lineCurrent++;
+ levelCurrent = levelNext;
+ levelMinCurrent = levelCurrent;
+ visibleChars = 0;
+ }
+ if (!isspacechar(ch))
+ visibleChars++;
+ }
+}
+
+static void FoldVerilogDoc(unsigned int startPos, int length, int initStyle, WordList *[],
+ Accessor &styler) {
+ FoldNoBoxVerilogDoc(startPos, length, initStyle, styler);
+}
+
+static const char * const verilogWordLists[] = {
+ "Primary keywords and identifiers",
+ "Secondary keywords and identifiers",
+ "System Tasks",
+ "User defined tasks and identifiers",
+ "Unused",
+ 0,
+ };
+
+
+LexerModule lmVerilog(SCLEX_VERILOG, ColouriseVerilogDoc, "verilog", FoldVerilogDoc, verilogWordLists);
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