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// Scintilla source code edit control
// Encoding: UTF-8
/** @file LexMMIXAL.cxx
** Lexer for MMIX Assembler Language.
** Written by Christoph Hösler <christoph.hoesler@student.uni-tuebingen.de>
** For information about MMIX visit http://www-cs-faculty.stanford.edu/~knuth/mmix.html
**/
// 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 <stdio.h>
#include <stdarg.h>
#include <assert.h>
#include <ctype.h>
#include <string>
#include <string_view>
#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"
using namespace Lexilla;
static inline bool IsAWordChar(const int ch) {
return (ch < 0x80) && (isalnum(ch) || ch == ':' || ch == '_');
}
static inline bool isMMIXALOperator(char ch) {
if (IsASCII(ch) && isalnum(ch))
return false;
if (ch == '+' || ch == '-' || ch == '|' || ch == '^' ||
ch == '*' || ch == '/' ||
ch == '%' || ch == '<' || ch == '>' || ch == '&' ||
ch == '~' || ch == '$' ||
ch == ',' || ch == '(' || ch == ')' ||
ch == '[' || ch == ']')
return true;
return false;
}
static void ColouriseMMIXALDoc(Sci_PositionU startPos, Sci_Position length, int initStyle, WordList *keywordlists[],
Accessor &styler) {
WordList &opcodes = *keywordlists[0];
WordList &special_register = *keywordlists[1];
WordList &predef_symbols = *keywordlists[2];
StyleContext sc(startPos, length, initStyle, styler);
for (; sc.More(); sc.Forward())
{
// No EOL continuation
if (sc.atLineStart) {
if (sc.ch == '@' && sc.chNext == 'i') {
sc.SetState(SCE_MMIXAL_INCLUDE);
} else {
sc.SetState(SCE_MMIXAL_LEADWS);
}
}
// Check if first non whitespace character in line is alphanumeric
if (sc.state == SCE_MMIXAL_LEADWS && !isspace(sc.ch)) { // LEADWS
if(!IsAWordChar(sc.ch)) {
sc.SetState(SCE_MMIXAL_COMMENT);
} else {
if(sc.atLineStart) {
sc.SetState(SCE_MMIXAL_LABEL);
} else {
sc.SetState(SCE_MMIXAL_OPCODE_PRE);
}
}
}
// Determine if the current state should terminate.
if (sc.state == SCE_MMIXAL_OPERATOR) { // OPERATOR
sc.SetState(SCE_MMIXAL_OPERANDS);
} else if (sc.state == SCE_MMIXAL_NUMBER) { // NUMBER
if (!isdigit(sc.ch)) {
if (IsAWordChar(sc.ch)) {
sc.ChangeState(SCE_MMIXAL_REF);
sc.SetState(SCE_MMIXAL_REF);
} else {
sc.SetState(SCE_MMIXAL_OPERANDS);
}
}
} else if (sc.state == SCE_MMIXAL_LABEL) { // LABEL
if (!IsAWordChar(sc.ch) ) {
sc.SetState(SCE_MMIXAL_OPCODE_PRE);
}
} else if (sc.state == SCE_MMIXAL_REF) { // REF
if (!IsAWordChar(sc.ch) ) {
char s0[100];
sc.GetCurrent(s0, sizeof(s0));
const char *s = s0;
if (*s == ':') { // ignore base prefix for match
++s;
}
if (special_register.InList(s)) {
sc.ChangeState(SCE_MMIXAL_REGISTER);
} else if (predef_symbols.InList(s)) {
sc.ChangeState(SCE_MMIXAL_SYMBOL);
}
sc.SetState(SCE_MMIXAL_OPERANDS);
}
} else if (sc.state == SCE_MMIXAL_OPCODE_PRE) { // OPCODE_PRE
if (!isspace(sc.ch)) {
sc.SetState(SCE_MMIXAL_OPCODE);
}
} else if (sc.state == SCE_MMIXAL_OPCODE) { // OPCODE
if (!IsAWordChar(sc.ch) ) {
char s[100];
sc.GetCurrent(s, sizeof(s));
if (opcodes.InList(s)) {
sc.ChangeState(SCE_MMIXAL_OPCODE_VALID);
} else {
sc.ChangeState(SCE_MMIXAL_OPCODE_UNKNOWN);
}
sc.SetState(SCE_MMIXAL_OPCODE_POST);
}
} else if (sc.state == SCE_MMIXAL_STRING) { // STRING
if (sc.ch == '\"') {
sc.ForwardSetState(SCE_MMIXAL_OPERANDS);
} else if (sc.atLineEnd) {
sc.ForwardSetState(SCE_MMIXAL_OPERANDS);
}
} else if (sc.state == SCE_MMIXAL_CHAR) { // CHAR
if (sc.ch == '\'') {
sc.ForwardSetState(SCE_MMIXAL_OPERANDS);
} else if (sc.atLineEnd) {
sc.ForwardSetState(SCE_MMIXAL_OPERANDS);
}
} else if (sc.state == SCE_MMIXAL_REGISTER) { // REGISTER
if (!isdigit(sc.ch)) {
sc.SetState(SCE_MMIXAL_OPERANDS);
}
} else if (sc.state == SCE_MMIXAL_HEX) { // HEX
if (!isxdigit(sc.ch)) {
sc.SetState(SCE_MMIXAL_OPERANDS);
}
}
// Determine if a new state should be entered.
if (sc.state == SCE_MMIXAL_OPCODE_POST || // OPCODE_POST
sc.state == SCE_MMIXAL_OPERANDS) { // OPERANDS
if (sc.state == SCE_MMIXAL_OPERANDS && isspace(sc.ch)) {
sc.SetState(SCE_MMIXAL_COMMENT);
} else if (isdigit(sc.ch)) {
sc.SetState(SCE_MMIXAL_NUMBER);
} else if (IsAWordChar(sc.ch) || sc.Match('@')) {
sc.SetState(SCE_MMIXAL_REF);
} else if (sc.Match('\"')) {
sc.SetState(SCE_MMIXAL_STRING);
} else if (sc.Match('\'')) {
sc.SetState(SCE_MMIXAL_CHAR);
} else if (sc.Match('$')) {
sc.SetState(SCE_MMIXAL_REGISTER);
} else if (sc.Match('#')) {
sc.SetState(SCE_MMIXAL_HEX);
} else if (isMMIXALOperator(static_cast<char>(sc.ch))) {
sc.SetState(SCE_MMIXAL_OPERATOR);
}
}
}
sc.Complete();
}
static const char * const MMIXALWordListDesc[] = {
"Operation Codes",
"Special Register",
"Predefined Symbols",
0
};
LexerModule lmMMIXAL(SCLEX_MMIXAL, ColouriseMMIXALDoc, "mmixal", 0, MMIXALWordListDesc);
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