diff options
Diffstat (limited to 'src/libs/3rdparty/libarchive/archive_write_open_memory.c')
| -rw-r--r-- | src/libs/3rdparty/libarchive/archive_write_open_memory.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/libs/3rdparty/libarchive/archive_write_open_memory.c b/src/libs/3rdparty/libarchive/archive_write_open_memory.c new file mode 100644 index 000000000..a8a0b817f --- /dev/null +++ b/src/libs/3rdparty/libarchive/archive_write_open_memory.c @@ -0,0 +1,115 @@ +/*- + * Copyright (c) 2003-2007 Tim Kientzle + * All rights reserved. + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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 AUTHOR(S) 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 "archive_platform.h" +__FBSDID("$FreeBSD: src/lib/libarchive/archive_write_open_memory.c,v 1.3 2007/01/09 08:05:56 kientzle Exp $"); + +#include <errno.h> +#include <stdlib.h> +#include <string.h> + +#include "archive.h" + +struct write_memory_data { + size_t used; + size_t size; + size_t * client_size; + unsigned char * buff; +}; + +static int memory_write_free(struct archive *, void *); +static int memory_write_open(struct archive *, void *); +static ssize_t memory_write(struct archive *, void *, const void *buff, size_t); + +/* + * Client provides a pointer to a block of memory to receive + * the data. The 'size' param both tells us the size of the + * client buffer and lets us tell the client the final size. + */ +int +archive_write_open_memory(struct archive *a, void *buff, size_t buffSize, size_t *used) +{ + struct write_memory_data *mine; + + mine = (struct write_memory_data *)calloc(1, sizeof(*mine)); + if (mine == NULL) { + archive_set_error(a, ENOMEM, "No memory"); + return (ARCHIVE_FATAL); + } + mine->buff = buff; + mine->size = buffSize; + mine->client_size = used; + return (archive_write_open2(a, mine, + memory_write_open, memory_write, NULL, memory_write_free)); +} + +static int +memory_write_open(struct archive *a, void *client_data) +{ + struct write_memory_data *mine; + mine = client_data; + mine->used = 0; + if (mine->client_size != NULL) + *mine->client_size = mine->used; + /* Disable padding if it hasn't been set explicitly. */ + if (-1 == archive_write_get_bytes_in_last_block(a)) + archive_write_set_bytes_in_last_block(a, 1); + return (ARCHIVE_OK); +} + +/* + * Copy the data into the client buffer. + * Note that we update mine->client_size on every write. + * In particular, this means the client can follow exactly + * how much has been written into their buffer at any time. + */ +static ssize_t +memory_write(struct archive *a, void *client_data, const void *buff, size_t length) +{ + struct write_memory_data *mine; + mine = client_data; + + if (mine->used + length > mine->size) { + archive_set_error(a, ENOMEM, "Buffer exhausted"); + return (ARCHIVE_FATAL); + } + memcpy(mine->buff + mine->used, buff, length); + mine->used += length; + if (mine->client_size != NULL) + *mine->client_size = mine->used; + return (length); +} + +static int +memory_write_free(struct archive *a, void *client_data) +{ + struct write_memory_data *mine; + (void)a; /* UNUSED */ + mine = client_data; + if (mine == NULL) + return (ARCHIVE_OK); + free(mine); + return (ARCHIVE_OK); +} |