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bgfx/3rdparty/scintilla/lexers/LexVerilog.cxx
Branimir Karadžić a510b8f347 Added Scintilla imgui.
2015-06-08 17:07:35 -07:00

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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 <string>
#include <vector>
#include <map>
#include <algorithm>
#include "ILexer.h"
#include "Scintilla.h"
#include "SciLexer.h"
#include "WordList.h"
#include "LexAccessor.h"
#include "Accessor.h"
#include "StyleContext.h"
#include "CharacterSet.h"
#include "LexerModule.h"
#include "OptionSet.h"
#include "SubStyles.h"
#ifdef SCI_NAMESPACE
using namespace Scintilla;
#endif
namespace {
// Use an unnamed namespace to protect the functions and classes from name conflicts
struct PPDefinition {
int line;
std::string key;
std::string value;
bool isUndef;
std::string arguments;
PPDefinition(int line_, const std::string &key_, const std::string &value_, bool isUndef_ = false, std::string arguments_="") :
line(line_), key(key_), value(value_), isUndef(isUndef_), arguments(arguments_) {
}
};
class LinePPState {
int state;
int ifTaken;
int level;
bool ValidLevel() const {
return level >= 0 && level < 32;
}
int maskLevel() const {
return 1 << level;
}
public:
LinePPState() : state(0), ifTaken(0), level(-1) {
}
bool IsInactive() const {
return state != 0;
}
bool CurrentIfTaken() const {
return (ifTaken & maskLevel()) != 0;
}
void StartSection(bool on) {
level++;
if (ValidLevel()) {
if (on) {
state &= ~maskLevel();
ifTaken |= maskLevel();
} else {
state |= maskLevel();
ifTaken &= ~maskLevel();
}
}
}
void EndSection() {
if (ValidLevel()) {
state &= ~maskLevel();
ifTaken &= ~maskLevel();
}
level--;
}
void InvertCurrentLevel() {
if (ValidLevel()) {
state ^= maskLevel();
ifTaken |= maskLevel();
}
}
};
// Hold the preprocessor state for each line seen.
// Currently one entry per line but could become sparse with just one entry per preprocessor line.
class PPStates {
std::vector<LinePPState> vlls;
public:
LinePPState ForLine(int line) const {
if ((line > 0) && (vlls.size() > static_cast<size_t>(line))) {
return vlls[line];
} else {
return LinePPState();
}
}
void Add(int line, LinePPState lls) {
vlls.resize(line+1);
vlls[line] = lls;
}
};
// Options used for LexerVerilog
struct OptionsVerilog {
bool foldComment;
bool foldPreprocessor;
bool foldPreprocessorElse;
bool foldCompact;
bool foldAtElse;
bool foldAtModule;
bool trackPreprocessor;
bool updatePreprocessor;
bool portStyling;
bool allUppercaseDocKeyword;
OptionsVerilog() {
foldComment = false;
foldPreprocessor = false;
foldPreprocessorElse = false;
foldCompact = false;
foldAtElse = false;
foldAtModule = false;
// for backwards compatibility, preprocessor functionality is disabled by default
trackPreprocessor = false;
updatePreprocessor = false;
// for backwards compatibility, treat input/output/inout as regular keywords
portStyling = false;
// for backwards compatibility, don't treat all uppercase identifiers as documentation keywords
allUppercaseDocKeyword = false;
}
};
struct OptionSetVerilog : public OptionSet<OptionsVerilog> {
OptionSetVerilog() {
DefineProperty("fold.comment", &OptionsVerilog::foldComment,
"This option enables folding multi-line comments when using the Verilog lexer.");
DefineProperty("fold.preprocessor", &OptionsVerilog::foldPreprocessor,
"This option enables folding preprocessor directives when using the Verilog lexer.");
DefineProperty("fold.compact", &OptionsVerilog::foldCompact);
DefineProperty("fold.at.else", &OptionsVerilog::foldAtElse,
"This option enables folding on the else line of an if statement.");
DefineProperty("fold.verilog.flags", &OptionsVerilog::foldAtModule,
"This option enables folding module definitions. Typically source files "
"contain only one module definition so this option is somewhat useless.");
DefineProperty("lexer.verilog.track.preprocessor", &OptionsVerilog::trackPreprocessor,
"Set to 1 to interpret `if/`else/`endif to grey out code that is not active.");
DefineProperty("lexer.verilog.update.preprocessor", &OptionsVerilog::updatePreprocessor,
"Set to 1 to update preprocessor definitions when `define, `undef, or `undefineall found.");
DefineProperty("lexer.verilog.portstyling", &OptionsVerilog::portStyling,
"Set to 1 to style input, output, and inout ports differently from regular keywords.");
DefineProperty("lexer.verilog.allupperkeywords", &OptionsVerilog::allUppercaseDocKeyword,
"Set to 1 to style identifiers that are all uppercase as documentation keyword.");
DefineProperty("lexer.verilog.fold.preprocessor.else", &OptionsVerilog::foldPreprocessorElse,
"This option enables folding on `else and `elsif preprocessor directives.");
}
};
const char styleSubable[] = {0};
}
class LexerVerilog : public ILexerWithSubStyles {
CharacterSet setWord;
WordList keywords;
WordList keywords2;
WordList keywords3;
WordList keywords4;
WordList keywords5;
WordList ppDefinitions;
PPStates vlls;
std::vector<PPDefinition> ppDefineHistory;
struct SymbolValue {
std::string value;
std::string arguments;
SymbolValue(const std::string &value_="", const std::string &arguments_="") : value(value_), arguments(arguments_) {
}
SymbolValue &operator = (const std::string &value_) {
value = value_;
arguments.clear();
return *this;
}
bool IsMacro() const {
return !arguments.empty();
}
};
typedef std::map<std::string, SymbolValue> SymbolTable;
SymbolTable preprocessorDefinitionsStart;
OptionsVerilog options;
OptionSetVerilog osVerilog;
enum { activeFlag = 0x40 };
SubStyles subStyles;
// states at end of line (EOL) during fold operations:
// foldExternFlag: EOL while parsing an extern function/task declaration terminated by ';'
// foldWaitDisableFlag: EOL while parsing wait or disable statement, terminated by "fork" or '('
// typdefFlag: EOL while parsing typedef statement, terminated by ';'
enum {foldExternFlag = 0x01, foldWaitDisableFlag = 0x02, typedefFlag = 0x04};
// map using line number as key to store fold state information
std::map<int, int> foldState;
public:
LexerVerilog() :
setWord(CharacterSet::setAlphaNum, "._", 0x80, true),
subStyles(styleSubable, 0x80, 0x40, activeFlag) {
}
virtual ~LexerVerilog() {}
int SCI_METHOD Version() const {
return lvSubStyles;
}
void SCI_METHOD Release() {
delete this;
}
const char* SCI_METHOD PropertyNames() {
return osVerilog.PropertyNames();
}
int SCI_METHOD PropertyType(const char* name) {
return osVerilog.PropertyType(name);
}
const char* SCI_METHOD DescribeProperty(const char* name) {
return osVerilog.DescribeProperty(name);
}
int SCI_METHOD PropertySet(const char* key, const char* val) {
return osVerilog.PropertySet(&options, key, val);
}
const char* SCI_METHOD DescribeWordListSets() {
return osVerilog.DescribeWordListSets();
}
int SCI_METHOD WordListSet(int n, const char* wl);
void SCI_METHOD Lex(unsigned int startPos, int length, int initStyle, IDocument *pAccess);
void SCI_METHOD Fold(unsigned int startPos, int length, int initStyle, IDocument *pAccess);
void* SCI_METHOD PrivateCall(int, void*) {
return 0;
}
int SCI_METHOD LineEndTypesSupported() {
return SC_LINE_END_TYPE_UNICODE;
}
int SCI_METHOD AllocateSubStyles(int styleBase, int numberStyles) {
return subStyles.Allocate(styleBase, numberStyles);
}
int SCI_METHOD SubStylesStart(int styleBase) {
return subStyles.Start(styleBase);
}
int SCI_METHOD SubStylesLength(int styleBase) {
return subStyles.Length(styleBase);
}
int SCI_METHOD StyleFromSubStyle(int subStyle) {
int styleBase = subStyles.BaseStyle(MaskActive(subStyle));
int active = subStyle & activeFlag;
return styleBase | active;
}
int SCI_METHOD PrimaryStyleFromStyle(int style) {
return MaskActive(style);
}
void SCI_METHOD FreeSubStyles() {
subStyles.Free();
}
void SCI_METHOD SetIdentifiers(int style, const char *identifiers) {
subStyles.SetIdentifiers(style, identifiers);
}
int SCI_METHOD DistanceToSecondaryStyles() {
return activeFlag;
}
const char * SCI_METHOD GetSubStyleBases() {
return styleSubable;
}
static ILexer* LexerFactoryVerilog() {
return new LexerVerilog();
}
static int MaskActive(int style) {
return style & ~activeFlag;
}
std::vector<std::string> Tokenize(const std::string &expr) const;
};
int SCI_METHOD LexerVerilog::WordListSet(int n, const char *wl) {
WordList *wordListN = 0;
switch (n) {
case 0:
wordListN = &keywords;
break;
case 1:
wordListN = &keywords2;
break;
case 2:
wordListN = &keywords3;
break;
case 3:
wordListN = &keywords4;
break;
case 4:
wordListN = &keywords5;
break;
case 5:
wordListN = &ppDefinitions;
break;
}
int firstModification = -1;
if (wordListN) {
WordList wlNew;
wlNew.Set(wl);
if (*wordListN != wlNew) {
wordListN->Set(wl);
firstModification = 0;
if (n == 5) {
// Rebuild preprocessorDefinitions
preprocessorDefinitionsStart.clear();
for (int nDefinition = 0; nDefinition < ppDefinitions.Length(); nDefinition++) {
const char *cpDefinition = ppDefinitions.WordAt(nDefinition);
const char *cpEquals = strchr(cpDefinition, '=');
if (cpEquals) {
std::string name(cpDefinition, cpEquals - cpDefinition);
std::string val(cpEquals+1);
size_t bracket = name.find('(');
size_t bracketEnd = name.find(')');
if ((bracket != std::string::npos) && (bracketEnd != std::string::npos)) {
// Macro
std::string args = name.substr(bracket + 1, bracketEnd - bracket - 1);
name = name.substr(0, bracket);
preprocessorDefinitionsStart[name] = SymbolValue(val, args);
} else {
preprocessorDefinitionsStart[name] = val;
}
} else {
std::string name(cpDefinition);
std::string val("1");
preprocessorDefinitionsStart[name] = val;
}
}
}
}
}
return firstModification;
}
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 inline bool AllUpperCase(const char *a) {
while (*a) {
if (*a >= 'a' && *a <= 'z') return false;
a++;
}
return true;
}
// Functor used to truncate history
struct After {
int line;
explicit After(int line_) : line(line_) {}
bool operator()(PPDefinition &p) const {
return p.line > line;
}
};
static std::string GetRestOfLine(LexAccessor &styler, int start, bool allowSpace) {
std::string restOfLine;
int i =0;
char ch = styler.SafeGetCharAt(start, '\n');
int endLine = styler.LineEnd(styler.GetLine(start));
while (((start+i) < endLine) && (ch != '\r')) {
char chNext = styler.SafeGetCharAt(start + i + 1, '\n');
if (ch == '/' && (chNext == '/' || chNext == '*'))
break;
if (allowSpace || (ch != ' '))
restOfLine += ch;
i++;
ch = chNext;
}
return restOfLine;
}
static bool IsSpaceOrTab(int ch) {
return ch == ' ' || ch == '\t';
}
void SCI_METHOD LexerVerilog::Lex(unsigned int startPos, int length, int initStyle, IDocument *pAccess)
{
LexAccessor styler(pAccess);
const int kwOther=0, kwDot=0x100, kwInput=0x200, kwOutput=0x300, kwInout=0x400;
int lineState = kwOther;
bool continuationLine = false;
int curLine = styler.GetLine(startPos);
if (curLine > 0) lineState = styler.GetLineState(curLine - 1);
// Do not leak onto next line
if (initStyle == SCE_V_STRINGEOL)
initStyle = SCE_V_DEFAULT;
if ((MaskActive(initStyle) == SCE_V_PREPROCESSOR) ||
(MaskActive(initStyle) == SCE_V_COMMENTLINE) ||
(MaskActive(initStyle) == SCE_V_COMMENTLINEBANG)) {
// Set continuationLine if last character of previous line is '\'
if (curLine > 0) {
int endLinePrevious = styler.LineEnd(curLine - 1);
if (endLinePrevious > 0) {
continuationLine = styler.SafeGetCharAt(endLinePrevious-1) == '\\';
}
}
}
StyleContext sc(startPos, length, initStyle, styler);
LinePPState preproc = vlls.ForLine(curLine);
bool definitionsChanged = false;
// Truncate ppDefineHistory before current line
if (!options.updatePreprocessor)
ppDefineHistory.clear();
std::vector<PPDefinition>::iterator itInvalid = std::find_if(ppDefineHistory.begin(), ppDefineHistory.end(), After(curLine-1));
if (itInvalid != ppDefineHistory.end()) {
ppDefineHistory.erase(itInvalid, ppDefineHistory.end());
definitionsChanged = true;
}
SymbolTable preprocessorDefinitions = preprocessorDefinitionsStart;
for (std::vector<PPDefinition>::iterator itDef = ppDefineHistory.begin(); itDef != ppDefineHistory.end(); ++itDef) {
if (itDef->isUndef)
preprocessorDefinitions.erase(itDef->key);
else
preprocessorDefinitions[itDef->key] = SymbolValue(itDef->value, itDef->arguments);
}
int activitySet = preproc.IsInactive() ? activeFlag : 0;
int lineEndNext = styler.LineEnd(curLine);
bool isEscapedId = false; // true when parsing an escaped Identifier
for (; sc.More(); sc.Forward()) {
if (sc.atLineStart) {
if (sc.state == SCE_V_STRING) {
// Prevent SCE_V_STRINGEOL from leaking back to previous line
sc.SetState(SCE_V_STRING);
}
if ((MaskActive(sc.state) == SCE_V_PREPROCESSOR) && (!continuationLine)) {
sc.SetState(SCE_V_DEFAULT|activitySet);
}
if (preproc.IsInactive()) {
activitySet = activeFlag;
sc.SetState(sc.state | activitySet);
}
}
if (sc.atLineEnd) {
curLine++;
lineEndNext = styler.LineEnd(curLine);
vlls.Add(curLine, preproc);
// Update the line state, so it can be seen by next line
styler.SetLineState(curLine, lineState);
isEscapedId = false; // EOL terminates an escaped Identifier
}
// Handle line continuation generically.
if (sc.ch == '\\') {
if (static_cast<int>((sc.currentPos+1)) >= lineEndNext) {
curLine++;
lineEndNext = styler.LineEnd(curLine);
vlls.Add(curLine, preproc);
// Update the line state, so it can be seen by next line
styler.SetLineState(curLine, lineState);
sc.Forward();
if (sc.ch == '\r' && sc.chNext == '\n') {
// Even in UTF-8, \r and \n are separate
sc.Forward();
}
continuationLine = true;
sc.Forward();
continue;
}
}
// for comment keyword
if (MaskActive(sc.state) == SCE_V_COMMENT_WORD && !IsAWordChar(sc.ch)) {
char s[100];
int state = lineState & 0xff;
sc.GetCurrent(s, sizeof(s));
if (keywords5.InList(s)) {
sc.ChangeState(SCE_V_COMMENT_WORD|activitySet);
} else {
sc.ChangeState(state|activitySet);
}
sc.SetState(state|activitySet);
}
const bool atLineEndBeforeSwitch = sc.atLineEnd;
// Determine if the current state should terminate.
switch (MaskActive(sc.state)) {
case SCE_V_OPERATOR:
sc.SetState(SCE_V_DEFAULT|activitySet);
break;
case SCE_V_NUMBER:
if (!(IsAWordChar(sc.ch) || (sc.ch == '?'))) {
sc.SetState(SCE_V_DEFAULT|activitySet);
}
break;
case SCE_V_IDENTIFIER:
if (!isEscapedId &&(!IsAWordChar(sc.ch) || (sc.ch == '.'))) {
char s[100];
lineState &= 0xff00;
sc.GetCurrent(s, sizeof(s));
if (options.portStyling && (strcmp(s, "input") == 0)) {
lineState = kwInput;
sc.ChangeState(SCE_V_INPUT|activitySet);
} else if (options.portStyling && (strcmp(s, "output") == 0)) {
lineState = kwOutput;
sc.ChangeState(SCE_V_OUTPUT|activitySet);
} else if (options.portStyling && (strcmp(s, "inout") == 0)) {
lineState = kwInout;
sc.ChangeState(SCE_V_INOUT|activitySet);
} else if (lineState == kwInput) {
sc.ChangeState(SCE_V_INPUT|activitySet);
} else if (lineState == kwOutput) {
sc.ChangeState(SCE_V_OUTPUT|activitySet);
} else if (lineState == kwInout) {
sc.ChangeState(SCE_V_INOUT|activitySet);
} else if (lineState == kwDot) {
lineState = kwOther;
if (options.portStyling)
sc.ChangeState(SCE_V_PORT_CONNECT|activitySet);
} else if (keywords.InList(s)) {
sc.ChangeState(SCE_V_WORD|activitySet);
} else if (keywords2.InList(s)) {
sc.ChangeState(SCE_V_WORD2|activitySet);
} else if (keywords3.InList(s)) {
sc.ChangeState(SCE_V_WORD3|activitySet);
} else if (keywords4.InList(s)) {
sc.ChangeState(SCE_V_USER|activitySet);
} else if (options.allUppercaseDocKeyword && AllUpperCase(s)) {
sc.ChangeState(SCE_V_USER|activitySet);
}
sc.SetState(SCE_V_DEFAULT|activitySet);
}
break;
case SCE_V_PREPROCESSOR:
if (!IsAWordChar(sc.ch) || sc.atLineEnd) {
sc.SetState(SCE_V_DEFAULT|activitySet);
}
break;
case SCE_V_COMMENT:
if (sc.Match('*', '/')) {
sc.Forward();
sc.ForwardSetState(SCE_V_DEFAULT|activitySet);
} else if (IsAWordStart(sc.ch)) {
lineState = sc.state | (lineState & 0xff00);
sc.SetState(SCE_V_COMMENT_WORD|activitySet);
}
break;
case SCE_V_COMMENTLINE:
case SCE_V_COMMENTLINEBANG:
if (sc.atLineStart) {
sc.SetState(SCE_V_DEFAULT|activitySet);
} else if (IsAWordStart(sc.ch)) {
lineState = sc.state | (lineState & 0xff00);
sc.SetState(SCE_V_COMMENT_WORD|activitySet);
}
break;
case SCE_V_STRING:
if (sc.ch == '\\') {
if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
sc.Forward();
}
} else if (sc.ch == '\"') {
sc.ForwardSetState(SCE_V_DEFAULT|activitySet);
} else if (sc.atLineEnd) {
sc.ChangeState(SCE_V_STRINGEOL|activitySet);
sc.ForwardSetState(SCE_V_DEFAULT|activitySet);
}
break;
}
if (sc.atLineEnd && !atLineEndBeforeSwitch) {
// State exit processing consumed characters up to end of line.
curLine++;
lineEndNext = styler.LineEnd(curLine);
vlls.Add(curLine, preproc);
// Update the line state, so it can be seen by next line
styler.SetLineState(curLine, lineState);
isEscapedId = false; // EOL terminates an escaped Identifier
}
// Determine if a new state should be entered.
if (MaskActive(sc.state) == SCE_V_DEFAULT) {
if (IsADigit(sc.ch) || (sc.ch == '\'') || (sc.ch == '.' && IsADigit(sc.chNext))) {
sc.SetState(SCE_V_NUMBER|activitySet);
} else if (IsAWordStart(sc.ch)) {
sc.SetState(SCE_V_IDENTIFIER|activitySet);
} else if (sc.Match('/', '*')) {
sc.SetState(SCE_V_COMMENT|activitySet);
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|activitySet);
else
sc.SetState(SCE_V_COMMENTLINE|activitySet);
} else if (sc.ch == '\"') {
sc.SetState(SCE_V_STRING|activitySet);
} else if (sc.ch == '`') {
sc.SetState(SCE_V_PREPROCESSOR|activitySet);
// 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|activitySet);
styler.SetLineState(curLine, lineState);
} else {
if (options.trackPreprocessor) {
if (sc.Match("ifdef") || sc.Match("ifndef")) {
bool isIfDef = sc.Match("ifdef");
int i = isIfDef ? 5 : 6;
std::string restOfLine = GetRestOfLine(styler, sc.currentPos + i + 1, false);
bool foundDef = preprocessorDefinitions.find(restOfLine) != preprocessorDefinitions.end();
preproc.StartSection(isIfDef == foundDef);
} else if (sc.Match("else")) {
if (!preproc.CurrentIfTaken()) {
preproc.InvertCurrentLevel();
activitySet = preproc.IsInactive() ? activeFlag : 0;
if (!activitySet) {
sc.ChangeState(SCE_V_PREPROCESSOR|activitySet);
}
} else if (!preproc.IsInactive()) {
preproc.InvertCurrentLevel();
activitySet = preproc.IsInactive() ? activeFlag : 0;
if (!activitySet) {
sc.ChangeState(SCE_V_PREPROCESSOR|activitySet);
}
}
} else if (sc.Match("elsif")) {
// Ensure only one chosen out of `if .. `elsif .. `elsif .. `else .. `endif
if (!preproc.CurrentIfTaken()) {
// Similar to `ifdef
std::string restOfLine = GetRestOfLine(styler, sc.currentPos + 6, true);
bool ifGood = preprocessorDefinitions.find(restOfLine) != preprocessorDefinitions.end();
if (ifGood) {
preproc.InvertCurrentLevel();
activitySet = preproc.IsInactive() ? activeFlag : 0;
if (!activitySet)
sc.ChangeState(SCE_V_PREPROCESSOR|activitySet);
}
} else if (!preproc.IsInactive()) {
preproc.InvertCurrentLevel();
activitySet = preproc.IsInactive() ? activeFlag : 0;
if (!activitySet)
sc.ChangeState(SCE_V_PREPROCESSOR|activitySet);
}
} else if (sc.Match("endif")) {
preproc.EndSection();
activitySet = preproc.IsInactive() ? activeFlag : 0;
sc.ChangeState(SCE_V_PREPROCESSOR|activitySet);
} else if (sc.Match("define")) {
if (options.updatePreprocessor && !preproc.IsInactive()) {
std::string restOfLine = GetRestOfLine(styler, sc.currentPos + 6, true);
size_t startName = 0;
while ((startName < restOfLine.length()) && IsSpaceOrTab(restOfLine[startName]))
startName++;
size_t endName = startName;
while ((endName < restOfLine.length()) && setWord.Contains(static_cast<unsigned char>(restOfLine[endName])))
endName++;
std::string key = restOfLine.substr(startName, endName-startName);
if ((endName < restOfLine.length()) && (restOfLine.at(endName) == '(')) {
// Macro
size_t endArgs = endName;
while ((endArgs < restOfLine.length()) && (restOfLine[endArgs] != ')'))
endArgs++;
std::string args = restOfLine.substr(endName + 1, endArgs - endName - 1);
size_t startValue = endArgs+1;
while ((startValue < restOfLine.length()) && IsSpaceOrTab(restOfLine[startValue]))
startValue++;
std::string value;
if (startValue < restOfLine.length())
value = restOfLine.substr(startValue);
preprocessorDefinitions[key] = SymbolValue(value, args);
ppDefineHistory.push_back(PPDefinition(curLine, key, value, false, args));
definitionsChanged = true;
} else {
// Value
size_t startValue = endName;
while ((startValue < restOfLine.length()) && IsSpaceOrTab(restOfLine[startValue]))
startValue++;
std::string value = restOfLine.substr(startValue);
preprocessorDefinitions[key] = value;
ppDefineHistory.push_back(PPDefinition(curLine, key, value));
definitionsChanged = true;
}
}
} else if (sc.Match("undefineall")) {
if (options.updatePreprocessor && !preproc.IsInactive()) {
// remove all preprocessor definitions
std::map<std::string, SymbolValue>::iterator itDef;
for(itDef = preprocessorDefinitions.begin(); itDef != preprocessorDefinitions.end(); ++itDef) {
ppDefineHistory.push_back(PPDefinition(curLine, itDef->first, "", true));
}
preprocessorDefinitions.clear();
definitionsChanged = true;
}
} else if (sc.Match("undef")) {
if (options.updatePreprocessor && !preproc.IsInactive()) {
std::string restOfLine = GetRestOfLine(styler, sc.currentPos + 5, true);
std::vector<std::string> tokens = Tokenize(restOfLine);
std::string key;
if (tokens.size() >= 1) {
key = tokens[0];
preprocessorDefinitions.erase(key);
ppDefineHistory.push_back(PPDefinition(curLine, key, "", true));
definitionsChanged = true;
}
}
}
}
}
} else if (sc.ch == '\\') {
// escaped identifier, everything is ok up to whitespace
isEscapedId = true;
sc.SetState(SCE_V_IDENTIFIER|activitySet);
} else if (isoperator(static_cast<char>(sc.ch)) || sc.ch == '@' || sc.ch == '#') {
sc.SetState(SCE_V_OPERATOR|activitySet);
if (sc.ch == '.') lineState = kwDot;
if (sc.ch == ';') lineState = kwOther;
}
}
if (isEscapedId && isspacechar(sc.ch)) {
isEscapedId = false;
}
}
if (definitionsChanged) {
styler.ChangeLexerState(startPos, startPos + length);
}
sc.Complete();
}
static bool IsStreamCommentStyle(int style) {
return style == SCE_V_COMMENT;
}
static bool IsCommentLine(int line, LexAccessor &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 {".
void SCI_METHOD LexerVerilog::Fold(unsigned int startPos, int length, int initStyle, IDocument *pAccess)
{
LexAccessor styler(pAccess);
bool foldAtBrace = 1;
bool foldAtParenthese = 1;
int lineCurrent = styler.GetLine(startPos);
// Move back one line to be compatible with LexerModule::Fold behavior, fixes problem with foldComment behavior
if (lineCurrent > 0) {
lineCurrent--;
int newStartPos = styler.LineStart(lineCurrent);
length += startPos - newStartPos;
startPos = newStartPos;
initStyle = 0;
if (startPos > 0) {
initStyle = styler.StyleAt(startPos - 1);
}
}
unsigned int endPos = startPos + length;
int visibleChars = 0;
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 = MaskActive(styler.StyleAt(startPos));
int style = MaskActive(initStyle);
// restore fold state (if it exists) for prior line
int stateCurrent = 0;
std::map<int,int>::iterator foldStateIterator = foldState.find(lineCurrent-1);
if (foldStateIterator != foldState.end()) {
stateCurrent = foldStateIterator->second;
}
// remove all foldState entries after lineCurrent-1
foldStateIterator = foldState.upper_bound(lineCurrent-1);
if (foldStateIterator != foldState.end()) {
foldState.erase(foldStateIterator, foldState.end());
}
for (unsigned int i = startPos; i < endPos; i++) {
char ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
int stylePrev = style;
style = styleNext;
styleNext = MaskActive(styler.StyleAt(i + 1));
bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
if (options.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 (options.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 (options.foldComment && (style == SCE_V_COMMENTLINE)) {
if ((ch == '/') && (chNext == '/')) {
char chNext2 = styler.SafeGetCharAt(i + 2);
if (chNext2 == '{') {
levelNext++;
} else if (chNext2 == '}') {
levelNext--;
}
}
}
if (options.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")) {
if (options.foldPreprocessorElse) {
// Measure the minimum before a begin to allow
// folding on "end else begin"
if (levelMinCurrent > levelNext) {
levelMinCurrent = levelNext;
}
}
levelNext++;
} else if (options.foldPreprocessorElse && styler.Match(j, "else")) {
levelNext--;
if (levelMinCurrent > levelNext) {
levelMinCurrent = levelNext;
}
levelNext++;
} else if (options.foldPreprocessorElse && styler.Match(j, "elsif")) {
levelNext--;
// Measure the minimum before a begin to allow
// folding on "end else begin"
if (levelMinCurrent > levelNext) {
levelMinCurrent = levelNext;
}
levelNext++;
} else if (styler.Match(j, "endif")) {
levelNext--;
}
}
}
if (style == SCE_V_OPERATOR) {
if (foldAtParenthese) {
if (ch == '(') {
levelNext++;
} else if (ch == ')') {
levelNext--;
}
}
// semicolons terminate external declarations
if (ch == ';') {
// extern and pure virtual declarations terminated by semicolon
if (stateCurrent & foldExternFlag) {
levelNext--;
stateCurrent &= ~foldExternFlag;
}
// wait and disable statements terminated by semicolon
if (stateCurrent & foldWaitDisableFlag) {
stateCurrent &= ~foldWaitDisableFlag;
}
// typedef statements terminated by semicolon
if (stateCurrent & typedefFlag) {
stateCurrent &= ~typedefFlag;
}
}
// wait and disable statements containing '(' will not contain "fork" keyword, special processing is not needed
if (ch == '(') {
if (stateCurrent & foldWaitDisableFlag) {
stateCurrent &= ~foldWaitDisableFlag;
}
}
}
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, "covergroup") ||
styler.Match(j, "function") ||
styler.Match(j, "generate") ||
styler.Match(j, "interface") ||
styler.Match(j, "package") ||
styler.Match(j, "primitive") ||
styler.Match(j, "program") ||
styler.Match(j, "sequence") ||
styler.Match(j, "specify") ||
styler.Match(j, "table") ||
styler.Match(j, "task") ||
(styler.Match(j, "module") && options.foldAtModule)) {
levelNext++;
} else if (styler.Match(j, "begin")) {
// Measure the minimum before a begin to allow
// folding on "end else begin"
if (levelMinCurrent > levelNext) {
levelMinCurrent = levelNext;
}
levelNext++;
} else if (styler.Match(j, "class")) {
// class does not introduce a block when used in a typedef statement
if (!(stateCurrent & typedefFlag))
levelNext++;
} else if (styler.Match(j, "fork")) {
// fork does not introduce a block when used in a wait or disable statement
if (stateCurrent & foldWaitDisableFlag) {
stateCurrent &= ~foldWaitDisableFlag;
} else
levelNext++;
} else if (styler.Match(j, "endcase") ||
styler.Match(j, "endclass") ||
styler.Match(j, "endfunction") ||
styler.Match(j, "endgenerate") ||
styler.Match(j, "endgroup") ||
styler.Match(j, "endinterface") ||
styler.Match(j, "endpackage") ||
styler.Match(j, "endprimitive") ||
styler.Match(j, "endprogram") ||
styler.Match(j, "endsequence") ||
styler.Match(j, "endspecify") ||
styler.Match(j, "endtable") ||
styler.Match(j, "endtask") ||
styler.Match(j, "join") ||
styler.Match(j, "join_any") ||
styler.Match(j, "join_none") ||
(styler.Match(j, "endmodule") && options.foldAtModule) ||
(styler.Match(j, "end") && !IsAWordChar(styler.SafeGetCharAt(j + 3)))) {
levelNext--;
} else if (styler.Match(j, "extern") ||
styler.Match(j, "pure")) {
// extern and pure virtual functions/tasks are terminated by ';' not endfunction/endtask
stateCurrent |= foldExternFlag;
} else if (styler.Match(j, "disable") ||
styler.Match(j, "wait")) {
// fork does not introduce a block when used in a wait or disable statement
stateCurrent |= foldWaitDisableFlag;
} else if (styler.Match(j, "typedef")) {
stateCurrent |= typedefFlag;
}
}
if (atEOL) {
int levelUse = levelCurrent;
if (options.foldAtElse||options.foldPreprocessorElse) {
levelUse = levelMinCurrent;
}
int lev = levelUse | levelNext << 16;
if (visibleChars == 0 && options.foldCompact)
lev |= SC_FOLDLEVELWHITEFLAG;
if (levelUse < levelNext)
lev |= SC_FOLDLEVELHEADERFLAG;
if (stateCurrent) {
foldState[lineCurrent] = stateCurrent;
}
if (lev != styler.LevelAt(lineCurrent)) {
styler.SetLevel(lineCurrent, lev);
}
lineCurrent++;
levelCurrent = levelNext;
levelMinCurrent = levelCurrent;
visibleChars = 0;
}
if (!isspacechar(ch))
visibleChars++;
}
}
std::vector<std::string> LexerVerilog::Tokenize(const std::string &expr) const {
// Break into tokens
std::vector<std::string> tokens;
const char *cp = expr.c_str();
while (*cp) {
std::string word;
if (setWord.Contains(static_cast<unsigned char>(*cp))) {
// Identifiers and numbers
while (setWord.Contains(static_cast<unsigned char>(*cp))) {
word += *cp;
cp++;
}
} else if (IsSpaceOrTab(*cp)) {
while (IsSpaceOrTab(*cp)) {
cp++;
}
continue;
} else {
// Should handle strings, characters, and comments here
word += *cp;
cp++;
}
tokens.push_back(word);
}
return tokens;
}
static const char * const verilogWordLists[] = {
"Primary keywords and identifiers",
"Secondary keywords and identifiers",
"System Tasks",
"User defined tasks and identifiers",
"Documentation comment keywords",
"Preprocessor definitions",
0,
};
LexerModule lmVerilog(SCLEX_VERILOG, LexerVerilog::LexerFactoryVerilog, "verilog", verilogWordLists);
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