diff options
Diffstat (limited to 'src/parsers/latexparser.cxx')
| -rw-r--r-- | src/parsers/latexparser.cxx | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/src/parsers/latexparser.cxx b/src/parsers/latexparser.cxx new file mode 100644 index 0000000..5ffe3fd --- /dev/null +++ b/src/parsers/latexparser.cxx @@ -0,0 +1,223 @@ +#include <cstdlib> +#include <cstring> +#include <cstdio> +#include <ctype.h> + +#include "../hunspell/csutil.hxx" +#include "latexparser.hxx" + +#ifndef W32 +using namespace std; +#endif + +static struct { + const 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 }, + { { "\\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 }, + { { "\\eqref", NULL } , 1 }, + { { "\\vskip", NULL } , 1 }, + { { "\\vglue", NULL } , 1 }, + { { "\'\'", NULL } , 1 } +}; + +#define PATTERN_LEN (sizeof(PATTERN) / sizeof(PATTERN[0])) + +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; + const 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; + int apostrophe; + 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 + apostrophe = 0; + if (! is_wordchar(line[actual] + head) || + (line[actual][head] == '\'' && line[actual][head+1] == '\'' && ++apostrophe)) { + state = 0; + char * t = alloc_token(token, &head); + if (apostrophe) head += 2; + 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; + } + } +} |