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461 lines
13 KiB
461 lines
13 KiB
// Scintilla source code edit control
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/** @file LexAsm.cxx
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** Lexer for Assembler, just for the MASM syntax
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** Written by The Black Horus
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** Enhancements and NASM stuff by Kein-Hong Man, 2003-10
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** SCE_ASM_COMMENTBLOCK and SCE_ASM_CHARACTER are for future GNU as colouring
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** Converted to lexer object and added further folding features/properties by "Udo Lechner" <dlchnr(at)gmx(dot)net>
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**/
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// Copyright 1998-2003 by Neil Hodgson <neilh@scintilla.org>
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// The License.txt file describes the conditions under which this software may be distributed.
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <assert.h>
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#include <ctype.h>
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#include <string>
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#include <map>
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#include <set>
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#include "ILexer.h"
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#include "Scintilla.h"
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#include "SciLexer.h"
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#include "WordList.h"
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#include "LexAccessor.h"
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#include "StyleContext.h"
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#include "CharacterSet.h"
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#include "LexerModule.h"
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#include "OptionSet.h"
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#ifdef SCI_NAMESPACE
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using namespace Scintilla;
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#endif
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static inline bool IsAWordChar(const int ch) {
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return (ch < 0x80) && (isalnum(ch) || ch == '.' ||
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ch == '_' || ch == '?');
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}
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static inline bool IsAWordStart(const int ch) {
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return (ch < 0x80) && (isalnum(ch) || ch == '_' || ch == '.' ||
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ch == '%' || ch == '@' || ch == '$' || ch == '?');
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}
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static inline bool IsAsmOperator(const int ch) {
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if ((ch < 0x80) && (isalnum(ch)))
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return false;
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// '.' left out as it is used to make up numbers
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if (ch == '*' || ch == '/' || ch == '-' || ch == '+' ||
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ch == '(' || ch == ')' || ch == '=' || ch == '^' ||
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ch == '[' || ch == ']' || ch == '<' || ch == '&' ||
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ch == '>' || ch == ',' || ch == '|' || ch == '~' ||
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ch == '%' || ch == ':')
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return true;
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return false;
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}
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static bool IsStreamCommentStyle(int style) {
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return style == SCE_ASM_COMMENTDIRECTIVE || style == SCE_ASM_COMMENTBLOCK;
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}
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static inline int LowerCase(int c) {
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if (c >= 'A' && c <= 'Z')
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return 'a' + c - 'A';
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return c;
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}
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// An individual named option for use in an OptionSet
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// Options used for LexerAsm
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struct OptionsAsm {
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std::string delimiter;
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bool fold;
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bool foldSyntaxBased;
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bool foldCommentMultiline;
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bool foldCommentExplicit;
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std::string foldExplicitStart;
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std::string foldExplicitEnd;
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bool foldExplicitAnywhere;
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bool foldCompact;
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OptionsAsm() {
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delimiter = "";
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fold = false;
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foldSyntaxBased = true;
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foldCommentMultiline = false;
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foldCommentExplicit = false;
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foldExplicitStart = "";
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foldExplicitEnd = "";
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foldExplicitAnywhere = false;
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foldCompact = true;
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}
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};
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static const char * const asmWordListDesc[] = {
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"CPU instructions",
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"FPU instructions",
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"Registers",
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"Directives",
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"Directive operands",
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"Extended instructions",
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"Directives4Foldstart",
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"Directives4Foldend",
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0
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};
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struct OptionSetAsm : public OptionSet<OptionsAsm> {
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OptionSetAsm() {
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DefineProperty("lexer.asm.comment.delimiter", &OptionsAsm::delimiter,
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"Character used for COMMENT directive's delimiter, replacing the standard \"~\".");
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DefineProperty("fold", &OptionsAsm::fold);
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DefineProperty("fold.asm.syntax.based", &OptionsAsm::foldSyntaxBased,
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"Set this property to 0 to disable syntax based folding.");
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DefineProperty("fold.asm.comment.multiline", &OptionsAsm::foldCommentMultiline,
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"Set this property to 1 to enable folding multi-line comments.");
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DefineProperty("fold.asm.comment.explicit", &OptionsAsm::foldCommentExplicit,
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"This option enables folding explicit fold points when using the Asm lexer. "
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"Explicit fold points allows adding extra folding by placing a ;{ comment at the start and a ;} "
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"at the end of a section that should fold.");
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DefineProperty("fold.asm.explicit.start", &OptionsAsm::foldExplicitStart,
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"The string to use for explicit fold start points, replacing the standard ;{.");
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DefineProperty("fold.asm.explicit.end", &OptionsAsm::foldExplicitEnd,
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"The string to use for explicit fold end points, replacing the standard ;}.");
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DefineProperty("fold.asm.explicit.anywhere", &OptionsAsm::foldExplicitAnywhere,
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"Set this property to 1 to enable explicit fold points anywhere, not just in line comments.");
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DefineProperty("fold.compact", &OptionsAsm::foldCompact);
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DefineWordListSets(asmWordListDesc);
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}
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};
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class LexerAsm : public ILexer {
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WordList cpuInstruction;
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WordList mathInstruction;
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WordList registers;
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WordList directive;
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WordList directiveOperand;
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WordList extInstruction;
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WordList directives4foldstart;
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WordList directives4foldend;
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OptionsAsm options;
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OptionSetAsm osAsm;
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public:
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LexerAsm() {
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}
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virtual ~LexerAsm() {
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}
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void SCI_METHOD Release() {
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delete this;
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}
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int SCI_METHOD Version() const {
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return lvOriginal;
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}
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const char * SCI_METHOD PropertyNames() {
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return osAsm.PropertyNames();
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}
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int SCI_METHOD PropertyType(const char *name) {
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return osAsm.PropertyType(name);
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}
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const char * SCI_METHOD DescribeProperty(const char *name) {
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return osAsm.DescribeProperty(name);
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}
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int SCI_METHOD PropertySet(const char *key, const char *val);
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const char * SCI_METHOD DescribeWordListSets() {
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return osAsm.DescribeWordListSets();
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}
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int SCI_METHOD WordListSet(int n, const char *wl);
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void SCI_METHOD Lex(unsigned int startPos, int length, int initStyle, IDocument *pAccess);
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void SCI_METHOD Fold(unsigned int startPos, int length, int initStyle, IDocument *pAccess);
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void * SCI_METHOD PrivateCall(int, void *) {
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return 0;
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}
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static ILexer *LexerFactoryAsm() {
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return new LexerAsm();
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}
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};
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int SCI_METHOD LexerAsm::PropertySet(const char *key, const char *val) {
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if (osAsm.PropertySet(&options, key, val)) {
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return 0;
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}
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return -1;
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}
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int SCI_METHOD LexerAsm::WordListSet(int n, const char *wl) {
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WordList *wordListN = 0;
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switch (n) {
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case 0:
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wordListN = &cpuInstruction;
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break;
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case 1:
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wordListN = &mathInstruction;
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break;
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case 2:
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wordListN = ®isters;
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break;
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case 3:
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wordListN = &directive;
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break;
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case 4:
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wordListN = &directiveOperand;
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break;
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case 5:
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wordListN = &extInstruction;
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break;
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case 6:
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wordListN = &directives4foldstart;
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break;
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case 7:
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wordListN = &directives4foldend;
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break;
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}
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int firstModification = -1;
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if (wordListN) {
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WordList wlNew;
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wlNew.Set(wl);
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if (*wordListN != wlNew) {
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wordListN->Set(wl);
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firstModification = 0;
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}
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}
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return firstModification;
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}
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void SCI_METHOD LexerAsm::Lex(unsigned int startPos, int length, int initStyle, IDocument *pAccess) {
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LexAccessor styler(pAccess);
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// Do not leak onto next line
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if (initStyle == SCE_ASM_STRINGEOL)
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initStyle = SCE_ASM_DEFAULT;
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StyleContext sc(startPos, length, initStyle, styler);
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for (; sc.More(); sc.Forward())
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{
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// Prevent SCE_ASM_STRINGEOL from leaking back to previous line
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if (sc.atLineStart && (sc.state == SCE_ASM_STRING)) {
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sc.SetState(SCE_ASM_STRING);
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} else if (sc.atLineStart && (sc.state == SCE_ASM_CHARACTER)) {
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sc.SetState(SCE_ASM_CHARACTER);
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}
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// Handle line continuation generically.
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if (sc.ch == '\\') {
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if (sc.chNext == '\n' || sc.chNext == '\r') {
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sc.Forward();
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if (sc.ch == '\r' && sc.chNext == '\n') {
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sc.Forward();
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}
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continue;
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}
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}
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// Determine if the current state should terminate.
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if (sc.state == SCE_ASM_OPERATOR) {
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if (!IsAsmOperator(sc.ch)) {
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sc.SetState(SCE_ASM_DEFAULT);
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}
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} else if (sc.state == SCE_ASM_NUMBER) {
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if (!IsAWordChar(sc.ch)) {
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sc.SetState(SCE_ASM_DEFAULT);
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}
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} else if (sc.state == SCE_ASM_IDENTIFIER) {
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if (!IsAWordChar(sc.ch) ) {
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char s[100];
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sc.GetCurrentLowered(s, sizeof(s));
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bool IsDirective = false;
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if (cpuInstruction.InList(s)) {
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sc.ChangeState(SCE_ASM_CPUINSTRUCTION);
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} else if (mathInstruction.InList(s)) {
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sc.ChangeState(SCE_ASM_MATHINSTRUCTION);
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} else if (registers.InList(s)) {
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sc.ChangeState(SCE_ASM_REGISTER);
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} else if (directive.InList(s)) {
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sc.ChangeState(SCE_ASM_DIRECTIVE);
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IsDirective = true;
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} else if (directiveOperand.InList(s)) {
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sc.ChangeState(SCE_ASM_DIRECTIVEOPERAND);
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} else if (extInstruction.InList(s)) {
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sc.ChangeState(SCE_ASM_EXTINSTRUCTION);
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}
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sc.SetState(SCE_ASM_DEFAULT);
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if (IsDirective && !strcmp(s, "comment")) {
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char delimiter = options.delimiter.empty() ? '~' : options.delimiter.c_str()[0];
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while (IsASpaceOrTab(sc.ch) && !sc.atLineEnd) {
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sc.ForwardSetState(SCE_ASM_DEFAULT);
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}
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if (sc.ch == delimiter) {
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sc.SetState(SCE_ASM_COMMENTDIRECTIVE);
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}
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}
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}
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} else if (sc.state == SCE_ASM_COMMENTDIRECTIVE) {
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char delimiter = options.delimiter.empty() ? '~' : options.delimiter.c_str()[0];
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if (sc.ch == delimiter) {
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while (!sc.atLineEnd) {
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sc.Forward();
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}
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sc.SetState(SCE_ASM_DEFAULT);
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}
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} else if (sc.state == SCE_ASM_COMMENT ) {
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if (sc.atLineEnd) {
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sc.SetState(SCE_ASM_DEFAULT);
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}
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} else if (sc.state == SCE_ASM_STRING) {
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if (sc.ch == '\\') {
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if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
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sc.Forward();
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}
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} else if (sc.ch == '\"') {
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sc.ForwardSetState(SCE_ASM_DEFAULT);
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} else if (sc.atLineEnd) {
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sc.ChangeState(SCE_ASM_STRINGEOL);
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sc.ForwardSetState(SCE_ASM_DEFAULT);
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}
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} else if (sc.state == SCE_ASM_CHARACTER) {
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if (sc.ch == '\\') {
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if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
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sc.Forward();
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}
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} else if (sc.ch == '\'') {
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sc.ForwardSetState(SCE_ASM_DEFAULT);
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} else if (sc.atLineEnd) {
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sc.ChangeState(SCE_ASM_STRINGEOL);
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sc.ForwardSetState(SCE_ASM_DEFAULT);
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}
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}
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// Determine if a new state should be entered.
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if (sc.state == SCE_ASM_DEFAULT) {
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if (sc.ch == ';'){
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sc.SetState(SCE_ASM_COMMENT);
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} else if (isascii(sc.ch) && (isdigit(sc.ch) || (sc.ch == '.' && isascii(sc.chNext) && isdigit(sc.chNext)))) {
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sc.SetState(SCE_ASM_NUMBER);
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} else if (IsAWordStart(sc.ch)) {
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sc.SetState(SCE_ASM_IDENTIFIER);
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} else if (sc.ch == '\"') {
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sc.SetState(SCE_ASM_STRING);
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} else if (sc.ch == '\'') {
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sc.SetState(SCE_ASM_CHARACTER);
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} else if (IsAsmOperator(sc.ch)) {
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sc.SetState(SCE_ASM_OPERATOR);
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}
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}
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}
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sc.Complete();
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}
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// Store both the current line's fold level and the next lines in the
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// level store to make it easy to pick up with each increment
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// and to make it possible to fiddle the current level for "else".
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void SCI_METHOD LexerAsm::Fold(unsigned int startPos, int length, int initStyle, IDocument *pAccess) {
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if (!options.fold)
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return;
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LexAccessor styler(pAccess);
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unsigned int endPos = startPos + length;
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int visibleChars = 0;
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int lineCurrent = styler.GetLine(startPos);
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int levelCurrent = SC_FOLDLEVELBASE;
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if (lineCurrent > 0)
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levelCurrent = styler.LevelAt(lineCurrent-1) >> 16;
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int levelNext = levelCurrent;
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char chNext = styler[startPos];
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int styleNext = styler.StyleAt(startPos);
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int style = initStyle;
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char word[100];
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int wordlen = 0;
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const bool userDefinedFoldMarkers = !options.foldExplicitStart.empty() && !options.foldExplicitEnd.empty();
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for (unsigned int i = startPos; i < endPos; i++) {
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char ch = chNext;
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chNext = styler.SafeGetCharAt(i + 1);
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int stylePrev = style;
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style = styleNext;
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styleNext = styler.StyleAt(i + 1);
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bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
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if (options.foldCommentMultiline && IsStreamCommentStyle(style)) {
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if (!IsStreamCommentStyle(stylePrev)) {
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levelNext++;
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} else if (!IsStreamCommentStyle(styleNext) && !atEOL) {
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// Comments don't end at end of line and the next character may be unstyled.
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levelNext--;
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}
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}
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if (options.foldCommentExplicit && ((style == SCE_ASM_COMMENT) || options.foldExplicitAnywhere)) {
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if (userDefinedFoldMarkers) {
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if (styler.Match(i, options.foldExplicitStart.c_str())) {
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levelNext++;
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} else if (styler.Match(i, options.foldExplicitEnd.c_str())) {
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levelNext--;
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}
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} else {
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if (ch == ';') {
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if (chNext == '{') {
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levelNext++;
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} else if (chNext == '}') {
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levelNext--;
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}
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}
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}
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}
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if (options.foldSyntaxBased && (style == SCE_ASM_DIRECTIVE)) {
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word[wordlen++] = static_cast<char>(LowerCase(ch));
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if (wordlen == 100) { // prevent overflow
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word[0] = '\0';
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wordlen = 1;
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}
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if (styleNext != SCE_ASM_DIRECTIVE) { // reading directive ready
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word[wordlen] = '\0';
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wordlen = 0;
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if (directives4foldstart.InList(word)) {
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levelNext++;
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} else if (directives4foldend.InList(word)){
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levelNext--;
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}
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}
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}
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if (!IsASpace(ch))
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visibleChars++;
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if (atEOL || (i == endPos-1)) {
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int levelUse = levelCurrent;
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int lev = levelUse | levelNext << 16;
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if (visibleChars == 0 && options.foldCompact)
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lev |= SC_FOLDLEVELWHITEFLAG;
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if (levelUse < levelNext)
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lev |= SC_FOLDLEVELHEADERFLAG;
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if (lev != styler.LevelAt(lineCurrent)) {
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styler.SetLevel(lineCurrent, lev);
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}
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lineCurrent++;
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levelCurrent = levelNext;
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if (atEOL && (i == static_cast<unsigned int>(styler.Length()-1))) {
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// There is an empty line at end of file so give it same level and empty
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styler.SetLevel(lineCurrent, (levelCurrent | levelCurrent << 16) | SC_FOLDLEVELWHITEFLAG);
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}
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visibleChars = 0;
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}
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}
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}
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LexerModule lmAsm(SCLEX_ASM, LexerAsm::LexerFactoryAsm, "asm", asmWordListDesc);
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