Aegisub/contrib/hunspell/src/parsers/latexparser.cxx
Amar Takhar 391219ea54 SVN Transition Step 5/7
1. svn mv assdraw csri hunspell lua51 contrib

* See r2749 for full description.

Originally committed to SVN as r2754.
2009-03-08 08:31:41 +00:00

214 lines
5.5 KiB
C++

#include <cstdlib>
#include <cstring>
#include <cstdio>
#include <ctype.h>
#include "../hunspell/csutil.hxx"
#include "latexparser.hxx"
#ifndef W32
using namespace std;
#endif
static struct {
char * pat[2];
int arg;
} PATTERN[] = {
{ { "\\(", "\\)" } , 0 },
{ { "$$", "$$" } , 0 },
{ { "$", "$" } , 0 },
{ { "\\begin{math}", "\\end{math}" } , 0 },
{ { "\\[", "\\]" } , 0 },
{ { "\\begin{displaymath}", "\\end{displaymath}" } , 0 },
{ { "\\begin{equation}", "\\end{equation}" } , 0 },
{ { "\\cite", NULL } , 1 },
{ { "\\nocite", NULL } , 1 },
{ { "\\index", NULL } , 1 },
{ { "\\label", NULL } , 1 },
{ { "\\ref", NULL } , 1 },
{ { "\\pageref", NULL } , 1 },
{ { "\\parbox", NULL } , 1 },
{ { "\\begin{verbatim}", "\\end{verbatim}" } , 0 },
{ { "\\verb+", "+" } , 0 },
{ { "\\verb|", "|" } , 0 },
{ { "\\verb#", "#" } , 0 },
{ { "\\verb*", "*" } , 0 },
{ { "\\documentstyle", "\\begin{document}" } , 0 },
{ { "\\documentclass", "\\begin{document}" } , 0 },
// { { "\\documentclass", NULL } , 1 },
{ { "\\usepackage", NULL } , 1 },
{ { "\\includeonly", NULL } , 1 },
{ { "\\include", NULL } , 1 },
{ { "\\input", NULL } , 1 },
{ { "\\vspace", NULL } , 1 },
{ { "\\setlength", NULL } , 2 },
{ { "\\addtolength", NULL } , 2 },
{ { "\\settowidth", NULL } , 2 },
{ { "\\rule", NULL } , 2 },
{ { "\\hspace", NULL } , 1 } ,
{ { "\\vspace", NULL } , 1 } ,
{ { "\\\\[", "]" } , 0 },
{ { "\\pagebreak[", "]" } , 0 } ,
{ { "\\nopagebreak[", "]" } , 0 } ,
{ { "\\enlargethispage", NULL } , 1 } ,
{ { "\\begin{tabular}", NULL } , 1 } ,
{ { "\\addcontentsline", NULL } , 2 } ,
{ { "\\begin{thebibliography}", NULL } , 1 } ,
{ { "\\bibliography", NULL } , 1 } ,
{ { "\\bibliographystyle", NULL } , 1 } ,
{ { "\\bibitem", NULL } , 1 } ,
{ { "\\begin", NULL } , 1 } ,
{ { "\\end", NULL } , 1 } ,
{ { "\\pagestyle", NULL } , 1 } ,
{ { "\\pagenumbering", NULL } , 1 } ,
{ { "\\thispagestyle", NULL } , 1 } ,
{ { "\\newtheorem", NULL } , 2 },
{ { "\\newcommand", NULL } , 2 },
{ { "\\renewcommand", NULL } , 2 },
{ { "\\setcounter", NULL } , 2 },
{ { "\\addtocounter", NULL } , 1 },
{ { "\\stepcounter", NULL } , 1 },
{ { "\\selectlanguage", NULL } , 1 },
{ { "\\inputencoding", NULL } , 1 },
{ { "\\hyphenation", NULL } , 1 },
{ { "\\definecolor", NULL } , 3 },
{ { "\\color", NULL } , 1 },
{ { "\\textcolor", NULL } , 1 },
{ { "\\pagecolor", NULL } , 1 },
{ { "\\colorbox", NULL } , 2 },
{ { "\\fcolorbox", NULL } , 2 },
{ { "\\declaregraphicsextensions", NULL } , 1 },
{ { "\\psfig", NULL } , 1 },
{ { "\\url", NULL } , 1 }
};
#define PATTERN_LEN (sizeof(PATTERN) / ((sizeof(char *) * 2) + sizeof(int)))
LaTeXParser::LaTeXParser(const char * wordchars)
{
init(wordchars);
}
LaTeXParser::LaTeXParser(unsigned short * wordchars, int len)
{
init(wordchars, len);
}
LaTeXParser::~LaTeXParser()
{
}
int LaTeXParser::look_pattern(int col)
{
for (unsigned int i = 0; i < PATTERN_LEN; i++) {
char * j = line[actual] + head;
char * k = PATTERN[i].pat[col];
if (! k) continue;
while ((*k != '\0') && (tolower(*j) == *k)) {
j++;
k++;
}
if (*k == '\0') return i;
}
return -1;
}
/*
* LaTeXParser
*
* state 0: not wordchar
* state 1: wordchar
* state 2: comments
* state 3: commands
* state 4: commands with arguments
* state 5: % comment
*
*/
char * LaTeXParser::next_token()
{
int i;
int slash = 0;
for (;;) {
// fprintf(stderr,"depth: %d, state: %d, , arg: %d, token: %s\n",depth,state,arg,line[actual]+head);
switch (state)
{
case 0: // non word chars
if ((pattern_num = look_pattern(0)) != -1) {
if (PATTERN[pattern_num].pat[1]) {
state = 2;
} else {
state = 4;
depth = 0;
arg = 0;
opt = 1;
}
head += strlen(PATTERN[pattern_num].pat[0]) - 1;
} else if ((line[actual][head] == '%')) {
state = 5;
} else if (is_wordchar(line[actual] + head)) {
state = 1;
token = head;
} else if (line[actual][head] == '\\') {
if (line[actual][head + 1] == '\\' || // \\ (linebreak)
(line[actual][head + 1] == '$') || // \$ (dollar sign)
(line[actual][head + 1] == '%')) { // \% (percent)
head++;
break;
}
state = 3;
} else if (line[actual][head] == '%') {
if ((head==0) || (line[actual][head - 1] != '\\')) state = 5;
}
break;
case 1: // wordchar
if (! is_wordchar(line[actual] + head)) {
state = 0;
char * t = alloc_token(token, &head);
if (t) return t;
}
break;
case 2: // comment, labels, etc
if (((i = look_pattern(1)) != -1) &&
(strcmp(PATTERN[i].pat[1],PATTERN[pattern_num].pat[1]) == 0)) {
state = 0;
head += strlen(PATTERN[pattern_num].pat[1]) - 1;
}
break;
case 3: // command
if ((tolower(line[actual][head]) < 'a') || (tolower(line[actual][head]) > 'z')) {
state = 0;
head--;
}
break;
case 4: // command with arguments
if (slash && (line[actual][head] != '\0')) {
slash = 0;
head++;
break;
} else if (line[actual][head]=='\\') {
slash = 1;
} else if ((line[actual][head] == '{') ||
((opt) && (line[actual][head] == '['))) {
depth++;
opt = 0;
} else if (line[actual][head] == '}') {
depth--;
if (depth == 0) {
opt = 1;
arg++;
}
if (((depth == 0) && (arg == PATTERN[pattern_num].arg)) ||
(depth < 0) ) {
state = 0; // XXX not handles the last optional arg.
}
} else if (line[actual][head] == ']') depth--;
} // case
if (next_char(line[actual], &head)) {
if (state == 5) state = 0;
return NULL;
}
}
}