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ZoneBuilder/Documents/Scintilla/LexForth.cxx

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// Scintilla source code edit control
/** @file LexCrontab.cxx
** Lexer to use with extended crontab files used by a powerful
** Windows scheduler/event monitor/automation manager nnCron.
** (http://nemtsev.eserv.ru/)
**/
// Copyright 1998-2001 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 "KeyWords.h"
#include "Scintilla.h"
#include "SciLexer.h"
#ifdef SCI_NAMESPACE
using namespace Scintilla;
#endif
bool is_whitespace(int ch){
return ch == '\n' || ch == '\r' || ch == '\t' || ch == ' ';
}
bool is_blank(int ch){
return ch == '\t' || ch == ' ';
}
//#define FORTH_DEBUG
#ifdef FORTH_DEBUG
static FILE *f_debug;
#define log(x) fputs(f_debug,x);
#else
#define log(x)
#endif
#define STATE_LOCALE
#define BL ' '
static Accessor *st;
static int cur_pos,pos1,pos2,pos0,lengthDoc;
char *buffer;
char getChar(bool is_bl){
char ch=st->SafeGetCharAt(cur_pos);
if(is_bl) if(is_whitespace(ch)) ch=BL;
return ch;
}
char getCharBL(){
char ch=st->SafeGetCharAt(cur_pos);
return ch;
}
bool is_eol(char ch){
return ch=='\n' || ch=='\r';
}
int parse(char ch, bool skip_eol){
// pos1 - start pos of word
// pos2 - pos after of word
// pos0 - start pos
char c=0;
int len;
bool is_bl=ch==BL;
pos0=pos1=pos2=cur_pos;
for(;cur_pos<lengthDoc && (c=getChar(is_bl))==ch; cur_pos++){
if(is_eol(c) && !skip_eol){
pos2=pos1;
return 0;
}
}
pos1=cur_pos;
pos2=pos1;
if(cur_pos==lengthDoc) return 0;
for(len=0;cur_pos<lengthDoc && (c=getChar(is_bl))!=ch; cur_pos++){
if(is_eol(c) && !skip_eol) break;
pos2++;
buffer[len++]=c;
}
if(c==ch) pos2--;
buffer[len]='\0';
#ifdef FORTH_DEBUG
fprintf(f_debug,"parse: %c %s\n",ch,buffer);
#endif
return len;
}
bool _is_number(char *s,int base){
for(;*s;s++){
int digit=((int)*s)-(int)'0';
#ifdef FORTH_DEBUG
fprintf(f_debug,"digit: %c %d\n",*s,digit);
#endif
if(digit>9 && base>10) digit-=7;
if(digit<0) return false;
if(digit>=base) return false;
}
return true;
}
bool is_number(char *s){
if(strncmp(s,"0x",2)==0) return _is_number(s+2,16);
return _is_number(s,10);
}
static void ColouriseForthDoc(unsigned int startPos, int length, int, WordList *keywordLists[], Accessor &styler)
{
st=&styler;
cur_pos=startPos;
lengthDoc = startPos + length;
buffer = new char[length];
#ifdef FORTH_DEBUG
f_debug=fopen("c:\\sci.log","at");
#endif
WordList &control = *keywordLists[0];
WordList &keyword = *keywordLists[1];
WordList &defword = *keywordLists[2];
WordList &preword1 = *keywordLists[3];
WordList &preword2 = *keywordLists[4];
WordList &strings = *keywordLists[5];
// go through all provided text segment
// using the hand-written state machine shown below
styler.StartAt(startPos);
styler.StartSegment(startPos);
while(parse(BL,true)!=0){
if(pos0!=pos1){
styler.ColourTo(pos0,SCE_FORTH_DEFAULT);
styler.ColourTo(pos1-1,SCE_FORTH_DEFAULT);
}
if(strcmp("\\",buffer)==0){
styler.ColourTo(pos1,SCE_FORTH_COMMENT);
parse(1,false);
styler.ColourTo(pos2,SCE_FORTH_COMMENT);
}else if(strcmp("(",buffer)==0){
styler.ColourTo(pos1,SCE_FORTH_COMMENT);
parse(')',true);
if(cur_pos<lengthDoc) cur_pos++;
styler.ColourTo(cur_pos,SCE_FORTH_COMMENT);
}else if(strcmp("[",buffer)==0){
styler.ColourTo(pos1,SCE_FORTH_STRING);
parse(']',true);
if(cur_pos<lengthDoc) cur_pos++;
styler.ColourTo(cur_pos,SCE_FORTH_STRING);
}else if(strcmp("{",buffer)==0){
styler.ColourTo(pos1,SCE_FORTH_LOCALE);
parse('}',false);
if(cur_pos<lengthDoc) cur_pos++;
styler.ColourTo(cur_pos,SCE_FORTH_LOCALE);
}else if(strings.InList(buffer)) {
styler.ColourTo(pos1,SCE_FORTH_STRING);
parse('"',false);
if(cur_pos<lengthDoc) cur_pos++;
styler.ColourTo(cur_pos,SCE_FORTH_STRING);
}else if(control.InList(buffer)) {
styler.ColourTo(pos1,SCE_FORTH_CONTROL);
styler.ColourTo(pos2,SCE_FORTH_CONTROL);
}else if(keyword.InList(buffer)) {
styler.ColourTo(pos1,SCE_FORTH_KEYWORD);
styler.ColourTo(pos2,SCE_FORTH_KEYWORD);
}else if(defword.InList(buffer)) {
styler.ColourTo(pos1,SCE_FORTH_KEYWORD);
styler.ColourTo(pos2,SCE_FORTH_KEYWORD);
parse(BL,false);
styler.ColourTo(pos1-1,SCE_FORTH_DEFAULT);
styler.ColourTo(pos1,SCE_FORTH_DEFWORD);
styler.ColourTo(pos2,SCE_FORTH_DEFWORD);
}else if(preword1.InList(buffer)) {
styler.ColourTo(pos1,SCE_FORTH_PREWORD1);
parse(BL,false);
styler.ColourTo(pos2,SCE_FORTH_PREWORD1);
}else if(preword2.InList(buffer)) {
styler.ColourTo(pos1,SCE_FORTH_PREWORD2);
parse(BL,false);
styler.ColourTo(pos2,SCE_FORTH_PREWORD2);
parse(BL,false);
styler.ColourTo(pos1,SCE_FORTH_STRING);
styler.ColourTo(pos2,SCE_FORTH_STRING);
}else if(is_number(buffer)){
styler.ColourTo(pos1,SCE_FORTH_NUMBER);
styler.ColourTo(pos2,SCE_FORTH_NUMBER);
}
}
#ifdef FORTH_DEBUG
fclose(f_debug);
#endif
delete []buffer;
return;
/*
if(control.InList(buffer)) {
styler.ColourTo(i,SCE_FORTH_CONTROL);
} else if(keyword.InList(buffer)) {
styler.ColourTo(i-1,SCE_FORTH_KEYWORD );
} else if(defword.InList(buffer)) {
styler.ColourTo(i-1,SCE_FORTH_DEFWORD );
// prev_state=SCE_FORTH_DEFWORD
} else if(preword1.InList(buffer)) {
styler.ColourTo(i-1,SCE_FORTH_PREWORD1 );
// state=SCE_FORTH_PREWORD1;
} else if(preword2.InList(buffer)) {
styler.ColourTo(i-1,SCE_FORTH_PREWORD2 );
} else {
styler.ColourTo(i-1,SCE_FORTH_DEFAULT);
}
*/
/*
chPrev=' ';
for (int i = startPos; i < lengthDoc; i++) {
char ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
if(i!=startPos) chPrev=styler.SafeGetCharAt(i - 1);
if (styler.IsLeadByte(ch)) {
chNext = styler.SafeGetCharAt(i + 2);
i++;
continue;
}
#ifdef FORTH_DEBUG
fprintf(f_debug,"%c %d ",ch,state);
#endif
switch(state) {
case SCE_FORTH_DEFAULT:
if(is_whitespace(ch)) {
// whitespace is simply ignored here...
styler.ColourTo(i,SCE_FORTH_DEFAULT);
break;
} else if( ch == '\\' && is_blank(chNext)) {
// signals the start of an one line comment...
state = SCE_FORTH_COMMENT;
styler.ColourTo(i,SCE_FORTH_COMMENT);
} else if( is_whitespace(chPrev) && ch == '(' && is_whitespace(chNext)) {
// signals the start of a plain comment...
state = SCE_FORTH_COMMENT_ML;
styler.ColourTo(i,SCE_FORTH_COMMENT_ML);
} else if( isdigit(ch) ) {
// signals the start of a number
bufferCount = 0;
buffer[bufferCount++] = ch;
state = SCE_FORTH_NUMBER;
} else if( !is_whitespace(ch)) {
// signals the start of an identifier
bufferCount = 0;
buffer[bufferCount++] = ch;
state = SCE_FORTH_IDENTIFIER;
} else {
// style it the default style..
styler.ColourTo(i,SCE_FORTH_DEFAULT);
}
break;
case SCE_FORTH_COMMENT:
// if we find a newline here,
// we simply go to default state
// else continue to work on it...
if( ch == '\n' || ch == '\r' ) {
state = SCE_FORTH_DEFAULT;
} else {
styler.ColourTo(i,SCE_FORTH_COMMENT);
}
break;
case SCE_FORTH_COMMENT_ML:
if( ch == ')') {
state = SCE_FORTH_DEFAULT;
} else {
styler.ColourTo(i+1,SCE_FORTH_COMMENT_ML);
}
break;
case SCE_FORTH_IDENTIFIER:
// stay in CONF_IDENTIFIER state until we find a non-alphanumeric
if( !is_whitespace(ch) ) {
buffer[bufferCount++] = ch;
} else {
state = SCE_FORTH_DEFAULT;
buffer[bufferCount] = '\0';
#ifdef FORTH_DEBUG
fprintf(f_debug,"\nid %s\n",buffer);
#endif
// check if the buffer contains a keyword,
// and highlight it if it is a keyword...
// switch(prev_state)
// case SCE_FORTH_DEFAULT:
if(control.InList(buffer)) {
styler.ColourTo(i,SCE_FORTH_CONTROL);
} else if(keyword.InList(buffer)) {
styler.ColourTo(i-1,SCE_FORTH_KEYWORD );
} else if(defword.InList(buffer)) {
styler.ColourTo(i-1,SCE_FORTH_DEFWORD );
// prev_state=SCE_FORTH_DEFWORD
} else if(preword1.InList(buffer)) {
styler.ColourTo(i-1,SCE_FORTH_PREWORD1 );
// state=SCE_FORTH_PREWORD1;
} else if(preword2.InList(buffer)) {
styler.ColourTo(i-1,SCE_FORTH_PREWORD2 );
} else {
styler.ColourTo(i-1,SCE_FORTH_DEFAULT);
}
// break;
// case
// push back the faulty character
chNext = styler[i--];
}
break;
case SCE_FORTH_NUMBER:
// stay in CONF_NUMBER state until we find a non-numeric
if( isdigit(ch) ) {
buffer[bufferCount++] = ch;
} else {
state = SCE_FORTH_DEFAULT;
buffer[bufferCount] = '\0';
// Colourize here... (normal number)
styler.ColourTo(i-1,SCE_FORTH_NUMBER);
// push back a character
chNext = styler[i--];
}
break;
}
}
#ifdef FORTH_DEBUG
fclose(f_debug);
#endif
delete []buffer;
*/
}
static void FoldForthDoc(unsigned int, int, int, WordList *[],
Accessor &) {
}
static const char * const forthWordLists[] = {
"control keywords",
"keywords",
"definition words",
"prewords with one argument",
"prewords with two arguments",
"string definition keywords",
0,
};
LexerModule lmForth(SCLEX_FORTH, ColouriseForthDoc, "forth",FoldForthDoc,forthWordLists);
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