diff options
Diffstat (limited to 'lib/comp/compressor.c')
| -rw-r--r-- | lib/comp/compressor.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/lib/comp/compressor.c b/lib/comp/compressor.c deleted file mode 100644 index e59d948..0000000 --- a/lib/comp/compressor.c +++ /dev/null @@ -1,183 +0,0 @@ -/* SPDX-License-Identifier: GPL-3.0-or-later */ -/* - * compressor.c - * - * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at> - */ -#include "config.h" - -#include <string.h> -#include <stdlib.h> -#include <stdio.h> - -#include "internal.h" -#include "util.h" - -typedef compressor_t *(*compressor_fun_t)(bool compress, size_t block_size, - char *options); - -typedef void (*compressor_help_fun_t)(void); - -static compressor_fun_t compressors[SQFS_COMP_MAX + 1] = { -#ifdef WITH_GZIP - [SQFS_COMP_GZIP] = create_gzip_compressor, -#endif -#ifdef WITH_XZ - [SQFS_COMP_XZ] = create_xz_compressor, -#endif -#ifdef WITH_LZO - [SQFS_COMP_LZO] = create_lzo_compressor, -#endif -#ifdef WITH_LZ4 - [SQFS_COMP_LZ4] = create_lz4_compressor, -#endif -#ifdef WITH_ZSTD - [SQFS_COMP_ZSTD] = create_zstd_compressor, -#endif -}; - -static const compressor_help_fun_t helpfuns[SQFS_COMP_MAX + 1] = { -#ifdef WITH_GZIP - [SQFS_COMP_GZIP] = compressor_gzip_print_help, -#endif -#ifdef WITH_XZ - [SQFS_COMP_XZ] = compressor_xz_print_help, -#endif -#ifdef WITH_LZO - [SQFS_COMP_LZO] = compressor_lzo_print_help, -#endif -#ifdef WITH_LZ4 - [SQFS_COMP_LZ4] = compressor_lz4_print_help, -#endif -#ifdef WITH_ZSTD - [SQFS_COMP_ZSTD] = compressor_zstd_print_help, -#endif -}; - -static const char *names[] = { - [SQFS_COMP_GZIP] = "gzip", - [SQFS_COMP_LZMA] = "lzma", - [SQFS_COMP_LZO] = "lzo", - [SQFS_COMP_XZ] = "xz", - [SQFS_COMP_LZ4] = "lz4", - [SQFS_COMP_ZSTD] = "zstd", -}; - -int generic_write_options(int fd, const void *data, size_t size) -{ - uint8_t buffer[size + 2]; - - *((uint16_t *)buffer) = htole16(0x8000 | size); - memcpy(buffer + 2, data, size); - - if (write_data("writing compressor options", - fd, buffer, sizeof(buffer))) { - return -1; - } - - return sizeof(buffer); -} - -int generic_read_options(int fd, void *data, size_t size) -{ - uint8_t buffer[size + 2]; - - if (read_data_at("reading compressor options", sizeof(sqfs_super_t), - fd, buffer, sizeof(buffer))) { - return -1; - } - - if (le16toh(*((uint16_t *)buffer)) != (0x8000 | size)) { - fputs("reading compressor options: invalid meta data header\n", - stderr); - return -1; - } - - memcpy(data, buffer + 2, size); - return 0; -} - -bool compressor_exists(E_SQFS_COMPRESSOR id) -{ - if (id < SQFS_COMP_MIN || id > SQFS_COMP_MAX) - return false; - - return (compressors[id] != NULL); -} - -compressor_t *compressor_create(E_SQFS_COMPRESSOR id, bool compress, - size_t block_size, char *options) -{ - if (id < SQFS_COMP_MIN || id > SQFS_COMP_MAX) - return NULL; - - if (compressors[id] == NULL) - return NULL; - - return compressors[id](compress, block_size, options); -} - -void compressor_print_help(E_SQFS_COMPRESSOR id) -{ - if (id < SQFS_COMP_MIN || id > SQFS_COMP_MAX) - return; - - if (compressors[id] == NULL) - return; - - helpfuns[id](); -} - -void compressor_print_available(void) -{ - size_t i; - - fputs("Available compressors:\n", stdout); - - for (i = 0; i < sizeof(names) / sizeof(names[0]); ++i) { - if (compressor_exists(i)) - printf("\t%s\n", names[i]); - } - - printf("\nDefault compressor: %s\n", names[compressor_get_default()]); -} - -const char *compressor_name_from_id(E_SQFS_COMPRESSOR id) -{ - if (id < 0 || (size_t)id >= sizeof(names) / sizeof(names[0])) - return NULL; - - return names[id]; -} - -int compressor_id_from_name(const char *name, E_SQFS_COMPRESSOR *out) -{ - size_t i; - - for (i = 0; i < sizeof(names) / sizeof(names[0]); ++i) { - if (names[i] != NULL && strcmp(names[i], name) == 0) { - *out = i; - return 0; - } - } - - return -1; -} - -E_SQFS_COMPRESSOR compressor_get_default(void) -{ -#if defined(WITH_XZ) - return SQFS_COMP_XZ; -#elif defined(WITH_ZSTD) - return SQFS_COMP_ZSTD; -#elif defined(WITH_GZIP) - return SQFS_COMP_GZIP; -#elif defined(WITH_LZO) - return SQFS_COMP_LZO; -#elif defined(WITH_LZ4) - return SQFS_COMP_LZ4; -#else - fputs("No compressor implementation available!\n", stderr); - exit(EXIT_FAILURE); -#endif -} |