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/* $Id$ */
/*
* Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the
* above copyright notice and this permission notice appear in all
* copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include "libmdocml.h"
#include "private.h"
static int rofftok_dashes(const char *);
static int rofftok_special(const char *);
static int rofftok_predef(const char *);
static int rofftok_defined(const char *);
static int
rofftok_defined(const char *buf)
{
if (0 == *buf)
return(-1);
if (0 == *(buf + 1))
return(-1);
if (0 != *(buf + 2))
return(-1);
if (0 == strcmp(buf, ">="))
return(ROFFTok_Ge);
else if (0 == strcmp(buf, "<="))
return(ROFFTok_Le);
else if (0 == strcmp(buf, "Rq"))
return(ROFFTok_Rquote);
else if (0 == strcmp(buf, "Lq"))
return(ROFFTok_Lquote);
else if (0 == strcmp(buf, "ua"))
return(ROFFTok_Uparrow);
else if (0 == strcmp(buf, "aa"))
return(ROFFTok_Acute);
else if (0 == strcmp(buf, "ga"))
return(ROFFTok_Grave);
else if (0 == strcmp(buf, "Pi"))
return(ROFFTok_Pi);
else if (0 == strcmp(buf, "Ne"))
return(ROFFTok_Ne);
else if (0 == strcmp(buf, "Le"))
return(ROFFTok_Le);
else if (0 == strcmp(buf, "Ge"))
return(ROFFTok_Ge);
else if (0 == strcmp(buf, "Lt"))
return(ROFFTok_Lt);
else if (0 == strcmp(buf, "Gt"))
return(ROFFTok_Gt);
else if (0 == strcmp(buf, "Pm"))
return(ROFFTok_Plusmin);
else if (0 == strcmp(buf, "If"))
return(ROFFTok_Infty);
else if (0 == strcmp(buf, "Na"))
return(ROFFTok_Nan);
else if (0 == strcmp(buf, "Ba"))
return(ROFFTok_Bar);
return(-1);
}
static int
rofftok_predef(const char *buf)
{
if (0 == *buf)
return(-1);
if ('(' == *buf)
return(rofftok_defined(++buf));
switch (*buf) {
case ('q'):
return(ROFFTok_Quote);
default:
break;
}
return(-1);
}
static int
rofftok_dashes(const char *buf)
{
if (0 == *buf)
return(-1);
else if (*buf++ != 'e')
return(-1);
if (0 == *buf)
return(-1);
else if (0 != *(buf + 1))
return(-1);
switch (*buf) {
case ('m'):
return(ROFFTok_Em);
case ('n'):
return(ROFFTok_En);
default:
break;
}
return(-1);
}
static int
rofftok_special(const char *buf)
{
if (0 == *buf)
return(-1);
else if (0 != *(buf + 1))
return(-1);
switch (*buf) {
case ('a'):
return(ROFFTok_Sp_A);
case ('b'):
return(ROFFTok_Sp_B);
case ('f'):
return(ROFFTok_Sp_F);
case ('n'):
return(ROFFTok_Sp_N);
case ('r'):
return(ROFFTok_Sp_R);
case ('t'):
return(ROFFTok_Sp_T);
case ('v'):
return(ROFFTok_Sp_V);
default:
break;
}
return(-1);
}
int
rofftok_scan(const char *buf)
{
assert(*buf);
if ('\\' != *buf++)
return(ROFFTok_MAX);
for ( ; *buf; buf++) {
switch (*buf) {
case ('e'):
return(rofftok_special(++buf));
case ('('):
return(rofftok_dashes(++buf));
case (' '):
return(ROFFTok_Space);
case ('&'):
return(ROFFTok_Null);
case ('-'):
return(ROFFTok_Hyphen);
case ('*'):
return(rofftok_predef(++buf));
case ('\\'):
return(ROFFTok_MAX);
default:
break;
}
}
return(-1);
}
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