You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
299 lines
10 KiB
299 lines
10 KiB
// 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);
|
|
|