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/*
** Copyright (C) 2001-2011 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)
{ char new_str [128] ;
size_t len_remaining, str_len ;
int k, str_flags ;
if (str == NULL)
return SFE_STR_BAD_STRING ;
str_len = strlen (str) ;
/* A few extra checks for write mode. */
if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
{ if ((psf->str_flags & SF_STR_ALLOW_START) == 0)
return SFE_STR_NO_SUPPORT ;
if (psf->have_written && (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 ;
} ;
/* Find the next free slot in table. */
for (k = 0 ; k < SF_MAX_STRINGS ; k++)
{ /* If we find a matching entry clear it. */
if (psf->strings [k].type == str_type)
psf->strings [k].type = -1 ;
if (psf->strings [k].type == 0)
break ;
} ;
/* Determine flags */
str_flags = SF_STR_LOCATE_START ;
if (psf->file.mode == SFM_RDWR || psf->have_written)
{ if ((psf->str_flags & SF_STR_ALLOW_END) == 0)
return SFE_STR_NO_ADD_END ;
str_flags = SF_STR_LOCATE_END ;
} ;
/* 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 ;
switch (str_type)
{ case SF_STR_SOFTWARE :
/* In write mode, want to append libsndfile-version to string. */
if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
{ if (strstr (str, PACKAGE) == NULL)
{ /*
** If the supplied string does not already contain a
** libsndfile-X.Y.Z component, then add it.
*/
if (strlen (str) == 0)
snprintf (new_str, sizeof (new_str), "%s-%s", PACKAGE, VERSION) ;
else
snprintf (new_str, sizeof (new_str), "%s (%s-%s)", str, PACKAGE, VERSION) ;
}
else
snprintf (new_str, sizeof (new_str), "%s", str) ;
str = new_str ;
} ;
break ;
case SF_STR_TITLE :
case SF_STR_COPYRIGHT :
case SF_STR_ARTIST :
case SF_STR_COMMENT :
case SF_STR_DATE :
case SF_STR_ALBUM :
case SF_STR_LICENSE :
case SF_STR_TRACKNUMBER :
case SF_STR_GENRE :
break ;
default :
psf_log_printf (psf, "%s : SFE_STR_BAD_TYPE\n", __func__) ;
return SFE_STR_BAD_TYPE ;
} ;
str_len = strlen (str) ;
len_remaining = SIGNED_SIZEOF (psf->str_storage) - (psf->str_end - psf->str_storage) ;
if (len_remaining < str_len + 2)
return SFE_STR_MAX_DATA ;
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) ;
/* Plus one to catch string terminator. */
psf->str_end += str_len + 1 ;
psf->str_flags |= str_flags ;
#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)) ;
psf_log_printf (psf, "used : %d\n", (int ) (psf->str_end - psf->str_storage)) ;
psf_log_printf (psf, "remaining : %d\n", SIGNED_SIZEOF (psf->str_storage) - (psf->str_end - psf->str_storage)) ;
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->file.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 */
int
psf_location_string_count (const SF_PRIVATE * psf, int location)
{ int k, count = 0 ;
for (k = 0 ; k < SF_MAX_STRINGS ; k++)
if (psf->strings [k].type > 0 && psf->strings [k].flags & location)
count ++ ;
return count ;
} /* psf_location_string_count */
/*==============================================================================
*/
#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", psf_isprint (ptr [k]) ? ptr [k] : '.') ;
puts ("") ;
ptr += 16 ;
len -= 16 ;
} ;
} /* hexdump */
#endif
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