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Diffstat (limited to 'lib/sqfshelper/comp_opt.c')
-rw-r--r--lib/sqfshelper/comp_opt.c379
1 files changed, 0 insertions, 379 deletions
diff --git a/lib/sqfshelper/comp_opt.c b/lib/sqfshelper/comp_opt.c
deleted file mode 100644
index 2b92da3..0000000
--- a/lib/sqfshelper/comp_opt.c
+++ /dev/null
@@ -1,379 +0,0 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
-/*
- * comp_opt.c
- *
- * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
- */
-#include "common.h"
-
-#include <string.h>
-#include <stdlib.h>
-#include <getopt.h>
-#include <ctype.h>
-
-typedef struct {
- const char *name;
- sqfs_u16 flag;
-} flag_t;
-
-static const flag_t gzip_flags[] = {
- { "default", SQFS_COMP_FLAG_GZIP_DEFAULT },
- { "filtered", SQFS_COMP_FLAG_GZIP_FILTERED },
- { "huffman", SQFS_COMP_FLAG_GZIP_HUFFMAN },
- { "rle", SQFS_COMP_FLAG_GZIP_RLE },
- { "fixed", SQFS_COMP_FLAG_GZIP_FIXED },
-};
-
-static const flag_t xz_flags[] = {
- { "x86", SQFS_COMP_FLAG_XZ_X86 },
- { "powerpc", SQFS_COMP_FLAG_XZ_POWERPC },
- { "ia64", SQFS_COMP_FLAG_XZ_IA64 },
- { "arm", SQFS_COMP_FLAG_XZ_ARM },
- { "armthumb", SQFS_COMP_FLAG_XZ_ARMTHUMB },
- { "sparc", SQFS_COMP_FLAG_XZ_SPARC },
-};
-
-static const flag_t lz4_flags[] = {
- { "hc", SQFS_COMP_FLAG_LZ4_HC },
-};
-
-static const char *lzo_algs[] = {
- [SQFS_LZO1X_1] = "lzo1x_1",
- [SQFS_LZO1X_1_11] = "lzo1x_1_11",
- [SQFS_LZO1X_1_12] = "lzo1x_1_12",
- [SQFS_LZO1X_1_15] = "lzo1x_1_15",
- [SQFS_LZO1X_999] = "lzo1x_999",
-};
-
-static int set_flag(sqfs_compressor_config_t *cfg, const char *name,
- const flag_t *flags, size_t num_flags)
-{
- size_t i;
-
- for (i = 0; i < num_flags; ++i) {
- if (strcmp(flags[i].name, name) == 0) {
- cfg->flags |= flags[i].flag;
- return 0;
- }
- }
-
- return -1;
-}
-
-static int find_lzo_alg(sqfs_compressor_config_t *cfg, const char *name)
-{
- size_t i;
-
- for (i = 0; i < sizeof(lzo_algs) / sizeof(lzo_algs[0]); ++i) {
- if (strcmp(lzo_algs[i], name) == 0) {
- cfg->opt.lzo.algorithm = i;
- return 0;
- }
- }
-
- return -1;
-}
-
-static int get_size_value(const char *value, sqfs_u32 *out, sqfs_u32 block_size)
-{
- int i;
-
- for (i = 0; isdigit(value[i]) && i < 9; ++i)
- ;
-
- if (i < 1 || i > 9)
- return -1;
-
- *out = atol(value);
-
- switch (value[i]) {
- case '\0':
- break;
- case 'm':
- case 'M':
- *out <<= 20;
- break;
- case 'k':
- case 'K':
- *out <<= 10;
- break;
- case '%':
- *out = (*out * block_size) / 100;
- break;
- default:
- return -1;
- }
-
- return 0;
-}
-
-enum {
- OPT_WINDOW = 0,
- OPT_LEVEL,
- OPT_ALG,
- OPT_DICT,
-};
-static char *const token[] = {
- [OPT_WINDOW] = (char *)"window",
- [OPT_LEVEL] = (char *)"level",
- [OPT_ALG] = (char *)"algorithm",
- [OPT_DICT] = (char *)"dictsize",
- NULL
-};
-
-int compressor_cfg_init_options(sqfs_compressor_config_t *cfg,
- E_SQFS_COMPRESSOR id,
- size_t block_size, char *options)
-{
- size_t num_flags = 0, min_level = 0, max_level = 0, level;
- const flag_t *flags = NULL;
- char *subopts, *value;
- int i, opt;
-
- if (sqfs_compressor_config_init(cfg, id, block_size, 0))
- return -1;
-
- if (options == NULL)
- return 0;
-
- switch (cfg->id) {
- case SQFS_COMP_GZIP:
- min_level = SQFS_GZIP_MIN_LEVEL;
- max_level = SQFS_GZIP_MAX_LEVEL;
- flags = gzip_flags;
- num_flags = sizeof(gzip_flags) / sizeof(gzip_flags[0]);
- break;
- case SQFS_COMP_LZO:
- min_level = SQFS_LZO_MIN_LEVEL;
- max_level = SQFS_LZO_MAX_LEVEL;
- break;
- case SQFS_COMP_ZSTD:
- min_level = SQFS_ZSTD_MIN_LEVEL;
- max_level = SQFS_ZSTD_MAX_LEVEL;
- break;
- case SQFS_COMP_XZ:
- flags = xz_flags;
- num_flags = sizeof(xz_flags) / sizeof(xz_flags[0]);
- break;
- case SQFS_COMP_LZ4:
- flags = lz4_flags;
- num_flags = sizeof(lz4_flags) / sizeof(lz4_flags[0]);
- break;
- default:
- break;
- }
-
- subopts = options;
-
- while (*subopts != '\0') {
- opt = getsubopt(&subopts, token, &value);
-
- switch (opt) {
- case OPT_WINDOW:
- if (cfg->id != SQFS_COMP_GZIP)
- goto fail_opt;
-
- if (value == NULL)
- goto fail_value;
-
- for (i = 0; isdigit(value[i]); ++i)
- ;
-
- if (i < 1 || i > 3 || value[i] != '\0')
- goto fail_window;
-
- cfg->opt.gzip.window_size = atoi(value);
-
- if (cfg->opt.gzip.window_size < SQFS_GZIP_MIN_WINDOW ||
- cfg->opt.gzip.window_size > SQFS_GZIP_MAX_WINDOW)
- goto fail_window;
- break;
- case OPT_LEVEL:
- if (value == NULL)
- goto fail_value;
-
- for (i = 0; isdigit(value[i]) && i < 3; ++i)
- ;
-
- if (i < 1 || i > 3 || value[i] != '\0')
- goto fail_level;
-
- level = atoi(value);
-
- if (level < min_level || level > max_level)
- goto fail_level;
-
- switch (cfg->id) {
- case SQFS_COMP_GZIP:
- cfg->opt.gzip.level = level;
- break;
- case SQFS_COMP_LZO:
- cfg->opt.lzo.level = level;
- break;
- case SQFS_COMP_ZSTD:
- cfg->opt.zstd.level = level;
- break;
- default:
- goto fail_opt;
- }
- break;
- case OPT_ALG:
- if (cfg->id != SQFS_COMP_LZO)
- goto fail_opt;
-
- if (value == NULL)
- goto fail_value;
-
- if (find_lzo_alg(cfg, value))
- goto fail_lzo_alg;
- break;
- case OPT_DICT:
- if (cfg->id != SQFS_COMP_XZ)
- goto fail_opt;
-
- if (value == NULL)
- goto fail_value;
-
- if (get_size_value(value, &cfg->opt.xz.dict_size,
- cfg->block_size)) {
- goto fail_dict;
- }
- break;
- default:
- if (set_flag(cfg, value, flags, num_flags))
- goto fail_opt;
- break;
- }
- }
-
- return 0;
-fail_lzo_alg:
- fprintf(stderr, "Unknown lzo variant '%s'.\n", value);
- return -1;
-fail_window:
- fputs("Window size must be a number between 8 and 15.\n", stderr);
- return -1;
-fail_level:
- fprintf(stderr,
- "Compression level must be a number between %zu and %zu.\n",
- min_level, max_level);
- return -1;
-fail_opt:
- fprintf(stderr, "Unknown compressor option '%s'.\n", value);
- return -1;
-fail_value:
- fprintf(stderr, "Missing value for compressor option '%s'.\n",
- token[opt]);
- return -1;
-fail_dict:
- fputs("Dictionary size must be a number with the optional "
- "suffix 'm','k' or '%'.\n", stderr);
- return -1;
-}
-
-typedef void (*compressor_help_fun_t)(void);
-
-static void gzip_print_help(void)
-{
- size_t i;
-
- printf(
-"Available options for gzip compressor:\n"
-"\n"
-" level=<value> Compression level. Value from 1 to 9.\n"
-" Defaults to %d.\n"
-" window=<size> Deflate compression window size. Value from 8 to 15.\n"
-" Defaults to %d.\n"
-"\n"
-"In additon to the options, one or more strategies can be specified.\n"
-"If multiple stratgies are provided, the one yielding the best compression\n"
-"ratio will be used.\n"
-"\n"
-"The following strategies are available:\n",
- SQFS_GZIP_DEFAULT_LEVEL, SQFS_GZIP_DEFAULT_WINDOW);
-
- for (i = 0; i < sizeof(gzip_flags) / sizeof(gzip_flags[0]); ++i)
- printf("\t%s\n", gzip_flags[i].name);
-}
-
-static void lz4_print_help(void)
-{
- fputs("Available options for lz4 compressor:\n"
- "\n"
- " hc If present, use slower but better compressing\n"
- " variant of lz4.\n"
- "\n",
- stdout);
-}
-
-static void lzo_print_help(void)
-{
- size_t i;
-
- fputs("Available options for lzo compressor:\n"
- "\n"
- " algorithm=<name> Specify the variant of lzo to use.\n"
- " Defaults to 'lzo1x_999'.\n"
- " level=<value> For lzo1x_999, the compression level.\n"
- " Value from 1 to 9. Defaults to 8.\n"
- " Ignored if algorithm is not lzo1x_999.\n"
- "\n"
- "Available algorithms:\n",
- stdout);
-
- for (i = 0; i < sizeof(lzo_algs) / sizeof(lzo_algs[0]); ++i)
- printf("\t%s\n", lzo_algs[i]);
-}
-
-static void xz_print_help(void)
-{
- size_t i;
-
- fputs(
-"Available options for xz compressor:\n"
-"\n"
-" dictsize=<value> Dictionary size. Either a value in bytes or a\n"
-" percentage of the block size. Defaults to 100%.\n"
-" The suffix '%' indicates a percentage. 'K' and 'M'\n"
-" can also be used for kibi and mebi bytes\n"
-" respecitively.\n"
-"\n"
-"In additon to the options, one or more bcj filters can be specified.\n"
-"If multiple filters are provided, the one yielding the best compression\n"
-"ratio will be used.\n"
-"\n"
-"The following filters are available:\n",
- stdout);
-
- for (i = 0; i < sizeof(xz_flags) / sizeof(xz_flags[0]); ++i)
- printf("\t%s\n", xz_flags[i].name);
-}
-
-static void zstd_print_help(void)
-{
- printf("Available options for zstd compressor:\n"
- "\n"
- " level=<value> Set compression level. Defaults to %d.\n"
- " Maximum is %d.\n"
- "\n",
- SQFS_ZSTD_DEFAULT_LEVEL, SQFS_ZSTD_MAX_LEVEL);
-}
-
-static const compressor_help_fun_t helpfuns[SQFS_COMP_MAX + 1] = {
- [SQFS_COMP_GZIP] = gzip_print_help,
- [SQFS_COMP_XZ] = xz_print_help,
- [SQFS_COMP_LZO] = lzo_print_help,
- [SQFS_COMP_LZ4] = lz4_print_help,
- [SQFS_COMP_ZSTD] = zstd_print_help,
-};
-
-void compressor_print_help(E_SQFS_COMPRESSOR id)
-{
- if (id < SQFS_COMP_MIN || id > SQFS_COMP_MAX)
- return;
-
- if (helpfuns[id] == NULL)
- return;
-
- helpfuns[id]();
-}
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