diff options
Diffstat (limited to 'ext/zip/lib/zip_source_buffer.c')
| -rw-r--r-- | ext/zip/lib/zip_source_buffer.c | 435 |
1 files changed, 0 insertions, 435 deletions
diff --git a/ext/zip/lib/zip_source_buffer.c b/ext/zip/lib/zip_source_buffer.c deleted file mode 100644 index b34017007d..0000000000 --- a/ext/zip/lib/zip_source_buffer.c +++ /dev/null @@ -1,435 +0,0 @@ -/* - zip_source_buffer.c -- create zip data source from buffer - Copyright (c) 1999-2017 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" - -#ifndef WRITE_FRAGMENT_SIZE -#define WRITE_FRAGMENT_SIZE 64*1024 -#endif - -struct buffer { - zip_uint64_t fragment_size; /* size of each fragment */ - - zip_uint8_t **fragments; /* pointers to fragments */ - zip_uint64_t nfragments; /* number of allocated fragments */ - zip_uint64_t fragments_capacity; /* size of fragments (number of pointers) */ - zip_uint64_t size; /* size of data in bytes */ - zip_uint64_t offset; /* current offset */ - int free_data; -}; - -typedef struct buffer buffer_t; - -struct read_data { - zip_error_t error; - time_t mtime; - buffer_t *in; - buffer_t *out; -}; - -static void buffer_free(buffer_t *buffer); -static buffer_t *buffer_new(zip_uint64_t fragment_size); -static buffer_t *buffer_new_read(const void *data, zip_uint64_t length, int free_data); -static buffer_t *buffer_new_write(zip_uint64_t fragment_size); -static zip_int64_t buffer_read(buffer_t *buffer, zip_uint8_t *data, zip_uint64_t length); -static int buffer_seek(buffer_t *buffer, void *data, zip_uint64_t len, zip_error_t *error); -static zip_int64_t buffer_write(buffer_t *buffer, const zip_uint8_t *data, zip_uint64_t length, zip_error_t *); - -static zip_int64_t read_data(void *, void *, zip_uint64_t, zip_source_cmd_t); - - -ZIP_EXTERN zip_source_t * -zip_source_buffer(zip_t *za, const void *data, zip_uint64_t len, int freep) -{ - if (za == NULL) - return NULL; - - return zip_source_buffer_create(data, len, freep, &za->error); -} - - -ZIP_EXTERN zip_source_t * -zip_source_buffer_create(const void *data, zip_uint64_t len, int freep, zip_error_t *error) -{ - struct read_data *ctx; - zip_source_t *zs; - - if (data == NULL && len > 0) { - zip_error_set(error, ZIP_ER_INVAL, 0); - return NULL; - } - - if ((ctx=(struct read_data *)malloc(sizeof(*ctx))) == NULL) { - zip_error_set(error, ZIP_ER_MEMORY, 0); - return NULL; - } - - if ((ctx->in = buffer_new_read(data, len, freep)) == NULL) { - zip_error_set(error, ZIP_ER_MEMORY, 0); - free(ctx); - return NULL; - } - - ctx->out = NULL; - ctx->mtime = time(NULL); - zip_error_init(&ctx->error); - - if ((zs=zip_source_function_create(read_data, ctx, error)) == NULL) { - buffer_free(ctx->in); - free(ctx); - return NULL; - } - - return zs; -} - - -static zip_int64_t -read_data(void *state, void *data, zip_uint64_t len, zip_source_cmd_t cmd) -{ - struct read_data *ctx = (struct read_data *)state; - - switch (cmd) { - case ZIP_SOURCE_BEGIN_WRITE: - if ((ctx->out = buffer_new_write(WRITE_FRAGMENT_SIZE)) == NULL) { - zip_error_set(&ctx->error, ZIP_ER_MEMORY, 0); - return -1; - } - return 0; - - case ZIP_SOURCE_CLOSE: - return 0; - - case ZIP_SOURCE_COMMIT_WRITE: - buffer_free(ctx->in); - ctx->in = ctx->out; - ctx->out = NULL; - return 0; - - case ZIP_SOURCE_ERROR: - return zip_error_to_data(&ctx->error, data, len); - - case ZIP_SOURCE_FREE: - buffer_free(ctx->in); - buffer_free(ctx->out); - free(ctx); - return 0; - - case ZIP_SOURCE_OPEN: - ctx->in->offset = 0; - return 0; - - case ZIP_SOURCE_READ: - if (len > ZIP_INT64_MAX) { - zip_error_set(&ctx->error, ZIP_ER_INVAL, 0); - return -1; - } - return buffer_read(ctx->in, data, len); - - case ZIP_SOURCE_REMOVE: - { - buffer_t *empty = buffer_new_read(NULL, 0, 0); - if (empty == 0) { - zip_error_set(&ctx->error, ZIP_ER_MEMORY, 0); - return -1; - } - - buffer_free(ctx->in); - ctx->in = empty; - return 0; - } - - case ZIP_SOURCE_ROLLBACK_WRITE: - buffer_free(ctx->out); - ctx->out = NULL; - return 0; - - case ZIP_SOURCE_SEEK: - return buffer_seek(ctx->in, data, len, &ctx->error); - - case ZIP_SOURCE_SEEK_WRITE: - return buffer_seek(ctx->out, data, len, &ctx->error); - - case ZIP_SOURCE_STAT: - { - zip_stat_t *st; - - if (len < sizeof(*st)) { - zip_error_set(&ctx->error, ZIP_ER_INVAL, 0); - return -1; - } - - st = (zip_stat_t *)data; - - zip_stat_init(st); - st->mtime = ctx->mtime; - st->size = ctx->in->size; - st->comp_size = st->size; - st->comp_method = ZIP_CM_STORE; - st->encryption_method = ZIP_EM_NONE; - st->valid = ZIP_STAT_MTIME|ZIP_STAT_SIZE|ZIP_STAT_COMP_SIZE|ZIP_STAT_COMP_METHOD|ZIP_STAT_ENCRYPTION_METHOD; - - return sizeof(*st); - } - - case ZIP_SOURCE_SUPPORTS: - return zip_source_make_command_bitmap(ZIP_SOURCE_OPEN, ZIP_SOURCE_READ, ZIP_SOURCE_CLOSE, ZIP_SOURCE_STAT, ZIP_SOURCE_ERROR, ZIP_SOURCE_FREE, ZIP_SOURCE_SEEK, ZIP_SOURCE_TELL, ZIP_SOURCE_BEGIN_WRITE, ZIP_SOURCE_COMMIT_WRITE, ZIP_SOURCE_REMOVE, ZIP_SOURCE_ROLLBACK_WRITE, ZIP_SOURCE_SEEK_WRITE, ZIP_SOURCE_TELL_WRITE, ZIP_SOURCE_WRITE, -1); - - case ZIP_SOURCE_TELL: - if (ctx->in->offset > ZIP_INT64_MAX) { - zip_error_set(&ctx->error, ZIP_ER_TELL, EOVERFLOW); - return -1; - } - return (zip_int64_t)ctx->in->offset; - - - case ZIP_SOURCE_TELL_WRITE: - if (ctx->out->offset > ZIP_INT64_MAX) { - zip_error_set(&ctx->error, ZIP_ER_TELL, EOVERFLOW); - return -1; - } - return (zip_int64_t)ctx->out->offset; - - case ZIP_SOURCE_WRITE: - if (len > ZIP_INT64_MAX) { - zip_error_set(&ctx->error, ZIP_ER_INVAL, 0); - return -1; - } - return buffer_write(ctx->out, data, len, &ctx->error); - - default: - zip_error_set(&ctx->error, ZIP_ER_OPNOTSUPP, 0); - return -1; - } -} - - -static void -buffer_free(buffer_t *buffer) -{ - if (buffer == NULL) { - return; - } - - if (buffer->free_data) { - zip_uint64_t i; - - for (i=0; i < buffer->nfragments; i++) { - free(buffer->fragments[i]); - } - } - free(buffer->fragments); - free(buffer); -} - - -static buffer_t * -buffer_new(zip_uint64_t fragment_size) -{ - buffer_t *buffer; - - if ((buffer = malloc(sizeof(*buffer))) == NULL) { - return NULL; - } - - buffer->fragment_size = fragment_size; - buffer->offset = 0; - buffer->free_data = 0; - buffer->nfragments = 0; - buffer->fragments_capacity = 0; - buffer->fragments = NULL; - buffer->size = 0; - - return buffer; -} - - -static buffer_t * -buffer_new_read(const void *data, zip_uint64_t length, int free_data) -{ - buffer_t *buffer; - - if ((buffer = buffer_new(length)) == NULL) { - return NULL; - } - - buffer->size = length; - - if (length > 0) { - if ((buffer->fragments = malloc(sizeof(*(buffer->fragments)))) == NULL) { - buffer_free(buffer); - return NULL; - } - buffer->fragments_capacity = 1; - - buffer->nfragments = 1; - buffer->fragments[0] = (zip_uint8_t *)data; - buffer->free_data = free_data; - } - - return buffer; -} - - -static buffer_t * -buffer_new_write(zip_uint64_t fragment_size) -{ - buffer_t *buffer; - - if ((buffer = buffer_new(fragment_size)) == NULL) { - return NULL; - } - - if ((buffer->fragments = malloc(sizeof(*(buffer->fragments)))) == NULL) { - buffer_free(buffer); - return NULL; - } - buffer->fragments_capacity = 1; - buffer->nfragments = 0; - buffer->free_data = 1; - - return buffer; -} - - -static zip_int64_t -buffer_read(buffer_t *buffer, zip_uint8_t *data, zip_uint64_t length) -{ - zip_uint64_t n, i, fragment_offset; - - length = ZIP_MIN(length, buffer->size - buffer->offset); - - if (length == 0) { - return 0; - } - if (length > ZIP_INT64_MAX) { - return -1; - } - - i = buffer->offset / buffer->fragment_size; - fragment_offset = buffer->offset % buffer->fragment_size; - n = 0; - while (n < length) { - zip_uint64_t left = ZIP_MIN(length - n, buffer->fragment_size - fragment_offset); - - memcpy(data + n, buffer->fragments[i] + fragment_offset, left); - - n += left; - i++; - fragment_offset = 0; - } - - buffer->offset += n; - return (zip_int64_t)n; -} - - -static int -buffer_seek(buffer_t *buffer, void *data, zip_uint64_t len, zip_error_t *error) -{ - zip_int64_t new_offset = zip_source_seek_compute_offset(buffer->offset, buffer->size, data, len, error); - - if (new_offset < 0) { - return -1; - } - - buffer->offset = (zip_uint64_t)new_offset; - return 0; -} - - -static zip_int64_t -buffer_write(buffer_t *buffer, const zip_uint8_t *data, zip_uint64_t length, zip_error_t *error) -{ - zip_uint64_t n, i, fragment_offset; - zip_uint8_t **fragments; - - if (buffer->offset + length + buffer->fragment_size - 1 < length) { - zip_error_set(error, ZIP_ER_INVAL, 0); - return -1; - } - - /* grow buffer if needed */ - if (buffer->offset + length > buffer->nfragments * buffer->fragment_size) { - zip_uint64_t needed_fragments = (buffer->offset + length + buffer->fragment_size - 1) / buffer->fragment_size; - - if (needed_fragments > buffer->fragments_capacity) { - zip_uint64_t new_capacity = buffer->fragments_capacity; - - while (new_capacity < needed_fragments) { - new_capacity *= 2; - } - - fragments = realloc(buffer->fragments, new_capacity * sizeof(*fragments)); - - if (fragments == NULL) { - zip_error_set(error, ZIP_ER_MEMORY, 0); - return -1; - } - - buffer->fragments = fragments; - buffer->fragments_capacity = new_capacity; - } - - while (buffer->nfragments < needed_fragments) { - if ((buffer->fragments[buffer->nfragments] = malloc(buffer->fragment_size)) == NULL) { - zip_error_set(error, ZIP_ER_MEMORY, 0); - return -1; - } - buffer->nfragments++; - } - } - - i = buffer->offset / buffer->fragment_size; - fragment_offset = buffer->offset % buffer->fragment_size; - n = 0; - while (n < length) { - zip_uint64_t left = ZIP_MIN(length - n, buffer->fragment_size - fragment_offset); - - memcpy(buffer->fragments[i] + fragment_offset, data + n, left); - - n += left; - i++; - fragment_offset = 0; - } - - buffer->offset += n; - if (buffer->offset > buffer->size) { - buffer->size = buffer->offset; - } - - return (zip_int64_t)n; -} |