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// Scintilla source code edit control
/** @file LexAsm.cxx
** Lexer for Assembler, just for the MASM syntax
** Written by The Black Horus
** Enhancements and NASM stuff by Kein-Hong Man, 2003-10
** SCE_ASM_COMMENTBLOCK and SCE_ASM_CHARACTER are for future GNU as colouring
**/
// Copyright 1998-2003 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 == '.' ||
ch == '%' || ch == '@' || ch == '$' || ch == '?');
}
static inline bool IsAsmOperator(char ch) {
if (isalnum(ch))
return false;
// '.' left out as it is used to make up numbers
if (ch == '*' || ch == '/' || ch == '-' || ch == '+' ||
ch == '(' || ch == ')' || ch == '=' || ch == '^' ||
ch == '[' || ch == ']' || ch == '<' || ch == '&' ||
ch == '>' || ch == ',' || ch == '|' || ch == '~' ||
ch == '%' || ch == ':')
return true;
return false;
}
static void ColouriseAsmDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
Accessor &styler) {
WordList &cpuInstruction = *keywordlists[0];
WordList &mathInstruction = *keywordlists[1];
WordList ®isters = *keywordlists[2];
WordList &directive = *keywordlists[3];
WordList &directiveOperand = *keywordlists[4];
WordList &extInstruction = *keywordlists[5];
// Do not leak onto next line
if (initStyle == SCE_ASM_STRINGEOL)
initStyle = SCE_ASM_DEFAULT;
StyleContext sc(startPos, length, initStyle, styler);
for (; sc.More(); sc.Forward())
{
// Prevent SCE_ASM_STRINGEOL from leaking back to previous line
if (sc.atLineStart && (sc.state == SCE_ASM_STRING)) {
sc.SetState(SCE_ASM_STRING);
} else if (sc.atLineStart && (sc.state == SCE_ASM_CHARACTER)) {
sc.SetState(SCE_ASM_CHARACTER);
}
// 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_ASM_OPERATOR) {
if (!IsAsmOperator(static_cast<char>(sc.ch))) {
sc.SetState(SCE_ASM_DEFAULT);
}
}else if (sc.state == SCE_ASM_NUMBER) {
if (!IsAWordChar(sc.ch)) {
sc.SetState(SCE_ASM_DEFAULT);
}
} else if (sc.state == SCE_ASM_IDENTIFIER) {
if (!IsAWordChar(sc.ch) ) {
char s[100];
sc.GetCurrentLowered(s, sizeof(s));
if (cpuInstruction.InList(s)) {
sc.ChangeState(SCE_ASM_CPUINSTRUCTION);
} else if (mathInstruction.InList(s)) {
sc.ChangeState(SCE_ASM_MATHINSTRUCTION);
} else if (registers.InList(s)) {
sc.ChangeState(SCE_ASM_REGISTER);
} else if (directive.InList(s)) {
sc.ChangeState(SCE_ASM_DIRECTIVE);
} else if (directiveOperand.InList(s)) {
sc.ChangeState(SCE_ASM_DIRECTIVEOPERAND);
} else if (extInstruction.InList(s)) {
sc.ChangeState(SCE_ASM_EXTINSTRUCTION);
}
sc.SetState(SCE_ASM_DEFAULT);
}
}
else if (sc.state == SCE_ASM_COMMENT ) {
if (sc.atLineEnd) {
sc.SetState(SCE_ASM_DEFAULT);
}
} else if (sc.state == SCE_ASM_STRING) {
if (sc.ch == '\\') {
if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
sc.Forward();
}
} else if (sc.ch == '\"') {
sc.ForwardSetState(SCE_ASM_DEFAULT);
} else if (sc.atLineEnd) {
sc.ChangeState(SCE_ASM_STRINGEOL);
sc.ForwardSetState(SCE_ASM_DEFAULT);
}
} else if (sc.state == SCE_ASM_CHARACTER) {
if (sc.ch == '\\') {
if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
sc.Forward();
}
} else if (sc.ch == '\'') {
sc.ForwardSetState(SCE_ASM_DEFAULT);
} else if (sc.atLineEnd) {
sc.ChangeState(SCE_ASM_STRINGEOL);
sc.ForwardSetState(SCE_ASM_DEFAULT);
}
}
// Determine if a new state should be entered.
if (sc.state == SCE_ASM_DEFAULT) {
if (sc.ch == ';'){
sc.SetState(SCE_ASM_COMMENT);
} else if (isdigit(sc.ch) || (sc.ch == '.' && isdigit(sc.chNext))) {
sc.SetState(SCE_ASM_NUMBER);
} else if (IsAWordStart(sc.ch)) {
sc.SetState(SCE_ASM_IDENTIFIER);
} else if (sc.ch == '\"') {
sc.SetState(SCE_ASM_STRING);
} else if (sc.ch == '\'') {
sc.SetState(SCE_ASM_CHARACTER);
} else if (IsAsmOperator(static_cast<char>(sc.ch))) {
sc.SetState(SCE_ASM_OPERATOR);
}
}
}
sc.Complete();
}
static const char * const asmWordListDesc[] = {
"CPU instructions",
"FPU instructions",
"Registers",
"Directives",
"Directive operands",
"Extended instructions",
0
};
LexerModule lmAsm(SCLEX_ASM, ColouriseAsmDoc, "asm", 0, asmWordListDesc);
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