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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 *, int *);
static int rofftok_special(const char *, int *);
static int rofftok_predef(const char *, int *);
static int rofftok_defined(const char *, int *);
static int
rofftok_defined(const char *buf, int *i)
{
const char *p;
if (0 == buf[*i])
return(-1);
if (0 == buf[*i + 1])
return(-1);
(*i)++;
p = &buf[(*i)++];
if (0 == memcmp(p, ">=", 2))
return(ROFFTok_Ge);
else if (0 == memcmp(p, "<=", 2))
return(ROFFTok_Le);
else if (0 == memcmp(p, "Rq", 2))
return(ROFFTok_Rquote);
else if (0 == memcmp(p, "Lq", 2))
return(ROFFTok_Lquote);
else if (0 == memcmp(p, "ua", 2))
return(ROFFTok_Uparrow);
else if (0 == memcmp(p, "aa", 2))
return(ROFFTok_Acute);
else if (0 == memcmp(p, "ga", 2))
return(ROFFTok_Grave);
else if (0 == memcmp(p, "Pi", 2))
return(ROFFTok_Pi);
else if (0 == memcmp(p, "Ne", 2))
return(ROFFTok_Ne);
else if (0 == memcmp(p, "Le", 2))
return(ROFFTok_Le);
else if (0 == memcmp(p, "Ge", 2))
return(ROFFTok_Ge);
else if (0 == memcmp(p, "Lt", 2))
return(ROFFTok_Lt);
else if (0 == memcmp(p, "Gt", 2))
return(ROFFTok_Gt);
else if (0 == memcmp(p, "Pm", 2))
return(ROFFTok_Plusmin);
else if (0 == memcmp(p, "If", 2))
return(ROFFTok_Infty);
else if (0 == memcmp(p, "Na", 2))
return(ROFFTok_Nan);
else if (0 == memcmp(p, "Ba", 2))
return(ROFFTok_Bar);
return(-1);
}
static int
rofftok_predef(const char *buf, int *i)
{
if (0 == buf[*i])
return(-1);
if ('(' == buf[*i])
return(rofftok_defined(buf, i));
switch (buf[*i]) {
case ('q'):
return(ROFFTok_Quote);
default:
break;
}
return(-1);
}
static int
rofftok_dashes(const char *buf, int *i)
{
if (0 == buf[*i])
return(-1);
else if (buf[(*i)++] != 'e')
return(-1);
if (0 == buf[*i])
return(-1);
switch (buf[*i]) {
case ('m'):
return(ROFFTok_Em);
case ('n'):
return(ROFFTok_En);
default:
break;
}
return(-1);
}
static int
rofftok_special(const char *buf, int *i)
{
if (0 == buf[*i])
return(ROFFTok_Slash);
switch (buf[*i]) {
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);
case ('0'):
return(ROFFTok_Sp_0);
default:
break;
}
return(-1);
}
int
rofftok_scan(const char *buf, int *i)
{
assert(*buf);
assert(buf[*i] == '\\');
(*i)++;
for ( ; buf[*i]; (*i)++) {
switch (buf[*i]) {
case ('e'):
(*i)++;
return(rofftok_special(buf, i));
case ('('):
(*i)++;
return(rofftok_dashes(buf, i));
case (' '):
return(ROFFTok_Space);
case ('&'):
return(ROFFTok_Null);
case ('-'):
return(ROFFTok_Hyphen);
case ('*'):
(*i)++;
return(rofftok_predef(buf, i));
case ('\\'):
return(ROFFTok_Slash);
default:
break;
}
}
return(-1);
}
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