diff options
Diffstat (limited to 'jni/libsndfile/strings.c')
| -rw-r--r-- | jni/libsndfile/strings.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/jni/libsndfile/strings.c b/jni/libsndfile/strings.c new file mode 100644 index 0000000..29e18a1 --- /dev/null +++ b/jni/libsndfile/strings.c @@ -0,0 +1,166 @@ +/* +** Copyright (C) 2001-2016 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 <stdio.h> +#include <string.h> +#include <math.h> + +#include "common.h" +#include "sfconfig.h" +#include "sndfile.h" + +#define STRINGS_DEBUG 0 + +int +psf_store_string (SF_PRIVATE *psf, int str_type, const char *str) +{ char new_str [128] ; + size_t 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->strings.flags & SF_STR_ALLOW_START) == 0) + return SFE_STR_NO_SUPPORT ; + if (psf->have_written && (psf->strings.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.data [k].type == str_type) + psf->strings.data [k].type = -1 ; + + if (psf->strings.data [k].type == 0) + break ; + } ; + + /* Determine flags */ + str_flags = SF_STR_LOCATE_START ; + if (psf->file.mode == SFM_RDWR || psf->have_written) + { if ((psf->strings.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->strings.storage_used != 0) + { psf_log_printf (psf, "SFE_STR_WEIRD : k == 0 && psf->strings.storage_used != 0\n") ; + return SFE_STR_WEIRD ; + } ; + + if (k != 0 && psf->strings.storage_used == 0) + { psf_log_printf (psf, "SFE_STR_WEIRD : k != 0 && psf->strings.storage_used == 0\n") ; + return SFE_STR_WEIRD ; + } ; + + /* Special case for the first string. */ + if (k == 0) + psf->strings.storage_used = 0 ; + + switch (str_type) + { + 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 : + return SFE_STR_BAD_TYPE ; + }; + + /* Plus one to catch string terminator. */ + str_len = strlen (str) + 1 ; + + if (psf->strings.storage_used + str_len + 1 > psf->strings.storage_len) + { char * temp = psf->strings.storage ; + size_t newlen = 2 * psf->strings.storage_len + str_len + 1 ; + + newlen = newlen < 256 ? 256 : newlen ; + + if ((psf->strings.storage = realloc (temp, newlen)) == NULL) + { psf->strings.storage = temp ; + return SFE_MALLOC_FAILED ; + } ; + + psf->strings.storage_len = newlen ; + } ; + + psf->strings.data [k].type = str_type ; + psf->strings.data [k].offset = psf->strings.storage_used ; + psf->strings.data [k].flags = str_flags ; + + memcpy (psf->strings.storage + psf->strings.storage_used, str, str_len) ; + psf->strings.storage_used += str_len ; + + psf->strings.flags |= str_flags ; + +#if STRINGS_DEBUG + printf ("storage_used : %zd / %zd\n", psf->strings.storage_used, psf->strings.storage_len) ; + psf_hexdump (psf->strings.storage, psf->strings.storage_used) ; +#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.data [k].type) + return psf->strings.storage + psf->strings.data [k].offset ; + + 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.data [k].type > 0 && psf->strings.data [k].flags & location) + count ++ ; + + return count ; +} /* psf_location_string_count */ |