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/*
* $Id: latex.c 5540 2011-02-06 18:25:10Z frlan $
*
* Copyright (c) 2000-2001, Jérôme Plût
* Copyright (c) 2006, Enrico Tröger
*
* This source code is released for free distribution under the terms of the
* GNU General Public License.
*
* This module contains functions for generating tags for source files
* for the TeX formatting system.
*/
/*
* INCLUDE FILES
*/
#include "general.h" /* must always come first */
#include <ctype.h>
#include <string.h>
#include "parse.h"
#include "read.h"
#include "vstring.h"
/*
* DATA DEFINITIONS
*/
typedef enum {
K_COMMAND,
K_ENVIRONMENT,
K_SECTION,
K_SUBSECTION,
K_SUBSUBSECTION,
K_CHAPTER,
K_LABEL
} TeXKind;
static kindOption TeXKinds[] = {
{ TRUE, 'f', "function", "command definitions" },
{ TRUE, 'c', "class", "environment definitions" },
{ TRUE, 'm', "member", "labels, sections and bibliography" },
{ TRUE, 'd', "macro", "subsections" },
{ TRUE, 'v', "variable", "subsubsections" },
{ TRUE, 'n', "namespace", "chapters"},
{ TRUE, 's', "struct", "labels and bibliography" }
};
#define TEX_BRACES (1<<0)
#define TEX_BSLASH (1<<1)
#define TEX_LABEL (1<<2)
/*
* FUNCTION DEFINITIONS
*/
static int getWord(const char * ref, const char **ptr)
{
const char *p = *ptr;
while ((*ref != '\0') && (*p != '\0') && (*ref == *p))
ref++, p++;
if (*ref)
return FALSE;
if (*p == '*') /* to allow something like \section*{foobar} */
p++;
*ptr = p;
return TRUE;
}
static void createTag(int flags, TeXKind kind, const char * l)
{
vString *name = vStringNew ();
while ((*l == ' '))
l++;
if (flags & (TEX_BRACES | TEX_LABEL))
{
if (*l == '[')
{
while (*l != ']')
{
if (*l == '\0')
goto no_tag;
l++;
}
l++; /* skip the closing square bracket */
}
if (*l != '{')
goto no_tag;
l++;
}
if (flags & TEX_BSLASH)
{
if ((*(l++)) != '\\')
goto no_tag;
}
if (flags & TEX_LABEL)
{
do
{
vStringPut(name, (int) *l);
++l;
} while ((*l != '\0') && (*l != '}'));
vStringTerminate(name);
if (name->buffer[0] != '}')
makeSimpleTag(name, TeXKinds, kind);
}
else if (isalpha((int) *l) || *l == '@')
{
do
{
vStringPut (name, (int) *l);
++l;
} while (isalpha((int) *l) || *l == '@');
vStringTerminate(name);
makeSimpleTag(name, TeXKinds, kind);
}
else
{
vStringPut(name, (int) *l);
vStringTerminate(name);
makeSimpleTag(name, TeXKinds, kind);
}
no_tag:
vStringDelete(name);
}
static void findTeXTags(void)
{
const char *line;
while ((line = (const char*)fileReadLine()) != NULL)
{
const char *cp = line;
/*int escaped = 0;*/
for (; *cp != '\0'; cp++)
{
if (*cp == '%')
break;
if (*cp == '\\')
{
cp++;
/* \newcommand{\command} */
if (getWord("newcommand", &cp)
|| getWord("providecommand", &cp)
|| getWord("renewcommand", &cp)
)
{
createTag (TEX_BRACES|TEX_BSLASH, K_COMMAND, cp);
continue;
}
/* \DeclareMathOperator{\command} */
else if (getWord("DeclareMathOperator", &cp))
{
if (*cp == '*')
cp++;
createTag(TEX_BRACES|TEX_BSLASH, K_COMMAND, cp);
continue;
}
/* \def\command */
else if (getWord("def", &cp))
{
createTag(TEX_BSLASH, K_COMMAND, cp);
continue;
}
/* \newenvironment{name} */
else if ( getWord("newenvironment", &cp)
|| getWord("newtheorem", &cp)
|| getWord("begin", &cp)
)
{
createTag(TEX_BRACES, K_ENVIRONMENT, cp);
continue;
}
/* \bibitem[label]{key} */
else if (getWord("bibitem", &cp))
{
while (*cp == ' ')
cp++;
if (*(cp++) != '[')
break;
while ((*cp != '\0') && (*cp != ']'))
cp++;
if (*(cp++) != ']')
break;
createTag(TEX_LABEL, K_LABEL, cp);
continue;
}
/* \label{key} */
else if (getWord("label", &cp))
{
createTag(TEX_LABEL, K_LABEL, cp);
continue;
}
/* \section{key} */
else if (getWord("section", &cp))
{
createTag(TEX_LABEL, K_SECTION, cp);
continue;
}
/* \subsection{key} */
else if (getWord("subsection", &cp))
{
createTag(TEX_LABEL, K_SUBSECTION, cp);
continue;
}
/* \subsubsection{key} */
else if (getWord("subsubsection", &cp))
{
createTag(TEX_LABEL, K_SUBSUBSECTION, cp);
continue;
}
/* \chapter{key} */
else if (getWord("chapter", &cp))
{
createTag(TEX_LABEL, K_CHAPTER, cp);
continue;
}
}
}
}
}
extern parserDefinition* LaTeXParser (void)
{
static const char *const extensions [] = { "tex", "sty", "idx", NULL };
parserDefinition * def = parserNew ("LaTeX");
def->kinds = TeXKinds;
def->kindCount = KIND_COUNT (TeXKinds);
def->extensions = extensions;
def->parser = findTeXTags;
return def;
}
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