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geany/scintilla/lexers/LexVerilog.cxx
Enrico Tröger 2c7d37dde4 Update Scintilla to version 2.22. 
Keep Scintilla's directory structure mostly and only remove unused lexers.

For now, this will break the build. The build systems have to be updated as well as scintilla_changes.patch.


git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/branches/unstable@5437 ea778897-0a13-0410-b9d1-a72fbfd435f5
2010-11-24 21:23:05 +00:00

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// 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 <stdio.h>
#include <stdarg.h>
#include <assert.h>
#include <ctype.h>
#include "ILexer.h"
#include "Scintilla.h"
#include "SciLexer.h"
#include "PropSetSimple.h"
#include "WordList.h"
#include "LexAccessor.h"
#include "Accessor.h"
#include "StyleContext.h"
#include "CharacterSet.h"
#include "LexerModule.h"
#ifdef SCI_NAMESPACE
using namespace Scintilla;
#endif
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.atLineStart) {
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;
}
static bool IsCommentLine(int line, Accessor &styler) {
int pos = styler.LineStart(line);
int eolPos = styler.LineStart(line + 1) - 1;
for (int i = pos; i < eolPos; i++) {
char ch = styler[i];
char chNext = styler.SafeGetCharAt(i + 1);
int style = styler.StyleAt(i);
if (ch == '/' && chNext == '/' &&
(style == SCE_V_COMMENTLINE || style == SCE_V_COMMENTLINEBANG)) {
return true;
} else if (!IsASpaceOrTab(ch)) {
return false;
}
}
return false;
}
// 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 && atEOL && IsCommentLine(lineCurrent, styler))
{
if (!IsCommentLine(lineCurrent - 1, styler)
&& IsCommentLine(lineCurrent + 1, styler))
levelNext++;
else if (IsCommentLine(lineCurrent - 1, styler)
&& !IsCommentLine(lineCurrent+1, styler))
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, "generate") ||
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, "endgenerate") ||
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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