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/*
** Copyright (C) 2001-2004 Erik de Castro Lopo <erikd@mega-nerd.com>
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU Lesser General Public License as published by
** the Free Software Foundation; either version 2.1 of the License, or
** (at your option) any later version.
**
** This program 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 Lesser General Public License for more details.
**
** You should have received a copy of the GNU Lesser General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "sfconfig.h"
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "sndfile.h"
#include "common.h"
#define STRINGS_DEBUG 0
#if STRINGS_DEBUG
static void hexdump (void *data, int len) ;
#endif
int
psf_store_string (SF_PRIVATE *psf, int str_type, const char *str)
{ static char lsf_name [] = PACKAGE "-" VERSION ;
static char bracket_name [] = " (" PACKAGE "-" VERSION ")" ;
int k, str_len, len_remaining, str_flags ;
if (str == NULL)
return SFE_STR_BAD_STRING ;
str_len = strlen (str) ;
/* A few extra checks for write mode. */
if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
{ if ((psf->str_flags & SF_STR_ALLOW_START) == 0)
return SFE_STR_NO_SUPPORT ;
if ((psf->str_flags & SF_STR_ALLOW_END) == 0)
return SFE_STR_NO_SUPPORT ;
/* Only allow zero length strings for software. */
if (str_type != SF_STR_SOFTWARE && str_len == 0)
return SFE_STR_BAD_STRING ;
} ;
/* Determine flags */
str_flags = SF_STR_LOCATE_START ;
if (psf->have_written)
{ if ((psf->str_flags & SF_STR_ALLOW_END) == 0)
return SFE_STR_NO_ADD_END ;
str_flags = SF_STR_LOCATE_END ;
} ;
/* Find next free slot in table. */
for (k = 0 ; k < SF_MAX_STRINGS ; k++)
if (psf->strings [k].type == 0)
break ;
/* More sanity checking. */
if (k >= SF_MAX_STRINGS)
return SFE_STR_MAX_COUNT ;
if (k == 0 && psf->str_end != NULL)
{ psf_log_printf (psf, "SFE_STR_WEIRD : k == 0 && psf->str_end != NULL\n") ;
return SFE_STR_WEIRD ;
} ;
if (k != 0 && psf->str_end == NULL)
{ psf_log_printf (psf, "SFE_STR_WEIRD : k != 0 && psf->str_end == NULL\n") ;
return SFE_STR_WEIRD ;
} ;
/* Special case for the first string. */
if (k == 0)
psf->str_end = psf->str_storage ;
#if STRINGS_DEBUG
psf_log_printf (psf, "str_storage : %X\n", (int) psf->str_storage) ;
psf_log_printf (psf, "str_end : %X\n", (int) psf->str_end) ;
psf_log_printf (psf, "sizeof (str_storage) : %d\n", SIGNED_SIZEOF (psf->str_storage)) ;
#endif
len_remaining = SIGNED_SIZEOF (psf->str_storage) - (psf->str_end - psf->str_storage) ;
if (len_remaining < str_len + 2)
return SFE_STR_MAX_DATA ;
switch (str_type)
{ case SF_STR_SOFTWARE :
/* In write mode, want to append libsndfile-version to string. */
if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
{ psf->strings [k].type = str_type ;
psf->strings [k].str = psf->str_end ;
psf->strings [k].flags = str_flags ;
memcpy (psf->str_end, str, str_len + 1) ;
psf->str_end += str_len ;
/*
** If the supplied string does not already contain a
** libsndfile-X.Y.Z component, then add it.
*/
if (strstr (str, PACKAGE) == NULL && len_remaining > (int) (strlen (bracket_name) + str_len + 2))
{ if (strlen (str) == 0)
strncat (psf->str_end, lsf_name, len_remaining) ;
else
strncat (psf->str_end, bracket_name, len_remaining) ;
psf->str_end += strlen (psf->str_end) ;
} ;
/* Plus one to catch string terminator. */
psf->str_end += 1 ;
break ;
} ;
/* Fall though if not write mode. */
case SF_STR_TITLE :
case SF_STR_COPYRIGHT :
case SF_STR_ARTIST :
case SF_STR_COMMENT :
case SF_STR_DATE :
psf->strings [k].type = str_type ;
psf->strings [k].str = psf->str_end ;
psf->strings [k].flags = str_flags ;
/* Plus one to catch string terminator. */
memcpy (psf->str_end, str, str_len + 1) ;
psf->str_end += str_len + 1 ;
break ;
default :
return SFE_STR_BAD_TYPE ;
} ;
psf->str_flags |= (psf->have_written) ? SF_STR_LOCATE_END : SF_STR_LOCATE_START ;
#if STRINGS_DEBUG
hexdump (psf->str_storage, 300) ;
#endif
return 0 ;
} /* psf_store_string */
int
psf_set_string (SF_PRIVATE *psf, int str_type, const char *str)
{ if (psf->mode == SFM_READ)
return SFE_STR_NOT_WRITE ;
return psf_store_string (psf, str_type, str) ;
} /* psf_set_string */
const char*
psf_get_string (SF_PRIVATE *psf, int str_type)
{ int k ;
for (k = 0 ; k < SF_MAX_STRINGS ; k++)
if (str_type == psf->strings [k].type)
return psf->strings [k].str ;
return NULL ;
} /* psf_get_string */
#if STRINGS_DEBUG
#include <ctype.h>
static void
hexdump (void *data, int len)
{ unsigned char *ptr ;
int k ;
ptr = data ;
puts ("---------------------------------------------------------") ;
while (len >= 16)
{ for (k = 0 ; k < 16 ; k++)
printf ("%02X ", ptr [k] & 0xFF) ;
printf (" ") ;
for (k = 0 ; k < 16 ; k++)
printf ("%c", isprint (ptr [k]) ? ptr [k] : '.') ;
puts ("") ;
ptr += 16 ;
len -= 16 ;
} ;
} /* hexdump */
#endif
/*
** Do not edit or modify anything in this comment block.
** The arch-tag line is a file identity tag for the GNU Arch
** revision control system.
**
** arch-tag: 04393aa1-9389-46fe-baf2-58a7bd544fd6
*/
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