diff options
Diffstat (limited to 'ext/zip/lib/zip_string.c')
| -rw-r--r-- | ext/zip/lib/zip_string.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/ext/zip/lib/zip_string.c b/ext/zip/lib/zip_string.c new file mode 100644 index 0000000000..4e8709b5f7 --- /dev/null +++ b/ext/zip/lib/zip_string.c @@ -0,0 +1,196 @@ +/* + zip_string.c -- string handling (with encoding) + Copyright (C) 2012 Dieter Baron and Thomas Klausner + + This file is part of libzip, a library to manipulate ZIP archives. + The authors can be contacted at <libzip@nih.at> + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions + are met: + 1. Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + 2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in + the documentation and/or other materials provided with the + distribution. + 3. The names of the authors may not be used to endorse or promote + products derived from this software without specific prior + written permission. + + THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS + OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY + DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER + IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN + IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + + + +#include <stdlib.h> +#include <string.h> + +#include "zipint.h" + + + +zip_uint32_t +_zip_string_crc32(const struct zip_string *s) +{ + zip_uint32_t crc; + + crc = (zip_uint32_t)crc32(0L, Z_NULL, 0); + + if (s != NULL) + crc = (zip_uint32_t)crc32(crc, s->raw, s->length); + + return crc; +} + + + +int +_zip_string_equal(const struct zip_string *a, const struct zip_string *b) +{ + if (a == NULL || b == NULL) + return a == b; + + if (a->length != b->length) + return 0; + + /* TODO: encoding */ + + return (memcmp(a->raw, b->raw, a->length) == 0); +} + + + +void +_zip_string_free(struct zip_string *s) +{ + if (s == NULL) + return; + + free(s->raw); + free(s->converted); + free(s); +} + + + +const zip_uint8_t * +_zip_string_get(struct zip_string *string, zip_uint32_t *lenp, zip_flags_t flags, struct zip_error *error) +{ + static const zip_uint8_t empty[1] = ""; + + if (string == NULL) { + if (lenp) + *lenp = 0; + return empty; + } + + if ((flags & ZIP_FL_ENC_RAW) == 0) { + /* start guessing */ + if (string->encoding == ZIP_ENCODING_UNKNOWN) + _zip_guess_encoding(string, ZIP_ENCODING_UNKNOWN); + + if (((flags & ZIP_FL_ENC_STRICT) + && string->encoding != ZIP_ENCODING_ASCII && string->encoding != ZIP_ENCODING_UTF8_KNOWN) + || (string->encoding == ZIP_ENCODING_CP437)) { + if (string->converted == NULL) { + if ((string->converted=_zip_cp437_to_utf8(string->raw, string->length, + &string->converted_length, error)) == NULL) + return NULL; + } + if (lenp) + *lenp = string->converted_length; + return string->converted; + } + } + + if (lenp) + *lenp = string->length; + return string->raw; +} + + + +zip_uint16_t +_zip_string_length(const struct zip_string *s) +{ + if (s == NULL) + return 0; + + return s->length; +} + + + +struct zip_string * +_zip_string_new(const zip_uint8_t *raw, zip_uint16_t length, zip_flags_t flags, struct zip_error *error) +{ + struct zip_string *s; + enum zip_encoding_type expected_encoding; + + if (length == 0) + return NULL; + + switch (flags & ZIP_FL_ENCODING_ALL) { + case ZIP_FL_ENC_GUESS: + expected_encoding = ZIP_ENCODING_UNKNOWN; + break; + case ZIP_FL_ENC_UTF_8: + expected_encoding = ZIP_ENCODING_UTF8_KNOWN; + break; + case ZIP_FL_ENC_CP437: + expected_encoding = ZIP_ENCODING_CP437; + break; + default: + _zip_error_set(error, ZIP_ER_INVAL, 0); + return NULL; + } + + if ((s=(struct zip_string *)malloc(sizeof(*s))) == NULL) { + _zip_error_set(error, ZIP_ER_MEMORY, 0); + return NULL; + } + + if ((s->raw=(zip_uint8_t *)malloc(length+1)) == NULL) { + free(s); + return NULL; + } + + memcpy(s->raw, raw, length); + s->raw[length] = '\0'; + s->length = length; + s->encoding = ZIP_ENCODING_UNKNOWN; + s->converted = NULL; + s->converted_length = 0; + + if (expected_encoding != ZIP_ENCODING_UNKNOWN) { + if (_zip_guess_encoding(s, expected_encoding) == ZIP_ENCODING_ERROR) { + _zip_string_free(s); + _zip_error_set(error, ZIP_ER_INVAL, 0); + return NULL; + } + } + + return s; +} + + + +void +_zip_string_write(const struct zip_string *s, FILE *f) +{ + if (s == NULL) + return; + + fwrite(s->raw, s->length, 1, f); +} |