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/*
This file is part of libextractor.
(C) 2002, 2003, 2004, 2009 Vidyut Samanta and Christian Grothoff
libextractor is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 2, or (at your
option) any later version.
libextractor is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with libextractor; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include "platform.h"
#include "extractor.h"
#include <ctype.h>
static char *
stndup (const char *str, size_t n)
{
char *tmp;
tmp = malloc (n + 1);
if (tmp == NULL)
return NULL;
tmp[n] = '\0';
memcpy (tmp, str, n);
return tmp;
}
static int
addKeyword (enum EXTRACTOR_MetaType type,
char *keyword,
EXTRACTOR_MetaDataProcessor proc,
void *proc_cls)
{
int ret;
if (keyword == NULL)
return 0;
if (strlen (keyword) == 0)
{
free (keyword);
return 0;
}
if ((keyword[0] == '\"') && (keyword[strlen (keyword) - 1] == '\"'))
{
char *tmp;
keyword[strlen (keyword) - 1] = '\0';
tmp = strdup (&keyword[1]);
free (keyword);
if (tmp == NULL)
return 0;
keyword = tmp;
}
if (strlen (keyword) == 0)
{
free (keyword);
return 0;
}
ret = proc (proc_cls,
"man",
type,
EXTRACTOR_METAFORMAT_UTF8,
"text/plain",
keyword,
strlen (keyword)+1);
free (keyword);
return ret;
}
static void
NEXT (size_t * end, const char *buf, const size_t size)
{
int quot;
quot = 0;
while ((*end < size) && (((quot & 1) != 0) || ((buf[*end] != ' '))))
{
if (buf[*end] == '\"')
quot++;
(*end)++;
}
if ((quot & 1) == 1)
(*end) = size + 1;
}
/**
* How many bytes do we actually try to scan? (from the beginning
* of the file).
*/
#define MAX_READ (16 * 1024)
#define ADD(t,s) do { if (0 != addKeyword (t, s, proc, proc_cls)) return 1; } while (0)
int
EXTRACTOR_man_extract (const char *buf,
size_t size,
EXTRACTOR_MetaDataProcessor proc,
void *proc_cls,
const char *options)
{
int pos;
size_t xsize;
const size_t xlen = strlen (".TH ");
if (size > MAX_READ)
size = MAX_READ;
pos = 0;
if (size < xlen)
return 0;
while ((pos < size - xlen) &&
((0 != strncmp (".TH ",
&buf[pos],
xlen)) || ((pos != 0) && (buf[pos - 1] != '\n'))))
{
if (!isgraph ((unsigned char) buf[pos]) &&
!isspace ((unsigned char) buf[pos]))
return 0;
pos++;
}
xsize = pos;
while ((xsize < size) && (buf[xsize] != '\n'))
xsize++;
size = xsize;
if (0 == strncmp (".TH ", &buf[pos], xlen))
{
size_t end;
pos += xlen;
end = pos;
NEXT (&end, buf, size);
if (end > size)
return 0;
if (end - pos > 0)
{
ADD (EXTRACTOR_METATYPE_TITLE, stndup (&buf[pos], end - pos));
pos = end + 1;
}
if (pos >= size)
return 0;
end = pos;
NEXT (&end, buf, size);
if (end > size)
return 0;
if (buf[pos] == '\"')
pos++;
if ((end - pos >= 1) && (end - pos <= 4))
{
switch (buf[pos])
{
case '1':
ADD (EXTRACTOR_METATYPE_SECTION,
strdup (_("Commands")));
break;
case '2':
ADD (EXTRACTOR_METATYPE_SECTION,
strdup (_("System calls")));
break;
case '3':
ADD (EXTRACTOR_METATYPE_SECTION,
strdup (_("Library calls")));
break;
case '4':
ADD (EXTRACTOR_METATYPE_SECTION,
strdup (_("Special files")));
break;
case '5':
ADD (EXTRACTOR_METATYPE_SECTION,
strdup (_("File formats and conventions")));
break;
case '6':
ADD (EXTRACTOR_METATYPE_SECTION,
strdup (_("Games")));
break;
case '7':
ADD (EXTRACTOR_METATYPE_SECTION,
strdup (_("Conventions and miscellaneous")));
break;
case '8':
ADD (EXTRACTOR_METATYPE_SECTION,
strdup (_("System management commands")));
break;
case '9':
ADD (EXTRACTOR_METATYPE_SECTION,
strdup (_("Kernel routines")));
break;
}
pos = end + 1;
}
end = pos;
NEXT (&end, buf, size);
if (end > size)
return 0;
if (end - pos > 0)
{
ADD (EXTRACTOR_METATYPE_MODIFICATION_DATE, stndup (&buf[pos], end - pos));
pos = end + 1;
}
end = pos;
NEXT (&end, buf, size);
if (end > size)
return 0;
if (end - pos > 0)
{
ADD (EXTRACTOR_METATYPE_SOURCE,
stndup (&buf[pos], end - pos));
pos = end + 1;
}
end = pos;
NEXT (&end, buf, size);
if (end > size)
return 0;
if (end - pos > 0)
{
ADD (EXTRACTOR_METATYPE_BOOK_TITLE,
stndup (&buf[pos], end - pos));
pos = end + 1;
}
}
return 0;
}
/* end of man_extractor.c */
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