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-rw-r--r--lib/common/comp_opt.c243
1 files changed, 89 insertions, 154 deletions
diff --git a/lib/common/comp_opt.c b/lib/common/comp_opt.c
index 5be4466..f77ac20 100644
--- a/lib/common/comp_opt.c
+++ b/lib/common/comp_opt.c
@@ -42,6 +42,16 @@ static const flag_t lz4_flags[] = {
{ "hc", SQFS_COMP_FLAG_LZ4_HC },
};
+static const struct {
+ const flag_t *flags;
+ size_t count;
+} comp_flags[SQFS_COMP_MAX + 1] = {
+ [SQFS_COMP_GZIP] = { gzip_flags, sizeof(gzip_flags) / sizeof(flag_t) },
+ [SQFS_COMP_XZ] = { xz_flags, sizeof(xz_flags) / sizeof(flag_t) },
+ [SQFS_COMP_LZMA] = { lzma_flags, sizeof(lzma_flags) / sizeof(flag_t) },
+ [SQFS_COMP_LZ4] = { lz4_flags, sizeof(lz4_flags) / sizeof(flag_t) },
+};
+
static const char *lzo_algs[] = {
[SQFS_LZO1X_1] = "lzo1x_1",
[SQFS_LZO1X_1_11] = "lzo1x_1_11",
@@ -50,10 +60,10 @@ static const char *lzo_algs[] = {
[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)
+static int set_flag(sqfs_compressor_config_t *cfg, const char *name)
{
- size_t i;
+ const flag_t *flags = comp_flags[cfg->id].flags;
+ size_t i, num_flags = comp_flags[cfg->id].count;
for (i = 0; i < num_flags; ++i) {
if (strcmp(flags[i].name, name) == 0) {
@@ -87,6 +97,7 @@ enum {
OPT_LC,
OPT_LP,
OPT_PB,
+ OPT_COUNT,
};
static char *const token[] = {
[OPT_WINDOW] = (char *)"window",
@@ -99,14 +110,54 @@ static char *const token[] = {
NULL
};
+static int opt_available[SQFS_COMP_MAX + 1] = {
+ [SQFS_COMP_GZIP] = (1 << OPT_WINDOW) | (1 << OPT_LEVEL),
+ [SQFS_COMP_XZ] = (1 << OPT_LEVEL) | (1 << OPT_DICT) | (1 << OPT_LC) |
+ (1 << OPT_LP) | (1 << OPT_PB),
+ [SQFS_COMP_LZMA] = (1 << OPT_LEVEL) | (1 << OPT_DICT) | (1 << OPT_LC) |
+ (1 << OPT_LP) | (1 << OPT_PB),
+ [SQFS_COMP_ZSTD] = (1 << OPT_LEVEL),
+ [SQFS_COMP_LZO] = (1 << OPT_LEVEL) | (1 << OPT_ALG),
+};
+
+static const struct {
+ int min;
+ int max;
+} value_range[SQFS_COMP_MAX + 1][OPT_COUNT] = {
+ [SQFS_COMP_GZIP] = {
+ [OPT_LEVEL] = { SQFS_GZIP_MIN_LEVEL, SQFS_GZIP_MAX_LEVEL },
+ [OPT_WINDOW] = { SQFS_GZIP_MIN_WINDOW, SQFS_GZIP_MAX_WINDOW },
+ },
+ [SQFS_COMP_XZ] = {
+ [OPT_LEVEL] = { SQFS_XZ_MIN_LEVEL, SQFS_XZ_MAX_LEVEL },
+ [OPT_DICT] = { SQFS_XZ_MIN_DICT_SIZE, SQFS_XZ_MAX_DICT_SIZE },
+ [OPT_LC] = { SQFS_XZ_MIN_LC, SQFS_XZ_MAX_LC },
+ [OPT_LP] = { SQFS_XZ_MIN_LP, SQFS_XZ_MAX_LP },
+ [OPT_PB] = { SQFS_XZ_MIN_PB, SQFS_XZ_MAX_PB },
+ },
+ [SQFS_COMP_LZMA] = {
+ [OPT_LEVEL] = { SQFS_LZMA_MIN_LEVEL, SQFS_LZMA_MAX_LEVEL },
+ [OPT_DICT] = { SQFS_LZMA_MIN_DICT_SIZE,
+ SQFS_LZMA_MAX_DICT_SIZE },
+ [OPT_LC] = { SQFS_LZMA_MIN_LC, SQFS_LZMA_MAX_LC },
+ [OPT_LP] = { SQFS_LZMA_MIN_LP, SQFS_LZMA_MAX_LP },
+ [OPT_PB] = { SQFS_LZMA_MIN_PB, SQFS_LZMA_MAX_PB },
+ },
+ [SQFS_COMP_ZSTD] = {
+ [OPT_LEVEL] = { SQFS_ZSTD_MIN_LEVEL, SQFS_ZSTD_MAX_LEVEL },
+ },
+ [SQFS_COMP_LZO] = {
+ [OPT_LEVEL] = { SQFS_LZO_MIN_LEVEL, SQFS_LZO_MAX_LEVEL },
+ },
+};
+
int compressor_cfg_init_options(sqfs_compressor_config_t *cfg,
SQFS_COMPRESSOR id,
size_t block_size, char *options)
{
- size_t num_flags = 0, min_level = 0, max_level = 0, level, dict_size;
- const flag_t *flags = NULL;
char *subopts, *value;
- int i, opt;
+ int opt, ival;
+ size_t szval;
if (sqfs_compressor_config_init(cfg, id, block_size, 0))
return -1;
@@ -114,151 +165,51 @@ int compressor_cfg_init_options(sqfs_compressor_config_t *cfg,
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:
- min_level = SQFS_XZ_MIN_LEVEL;
- max_level = SQFS_XZ_MAX_LEVEL;
- flags = xz_flags;
- num_flags = sizeof(xz_flags) / sizeof(xz_flags[0]);
- break;
- case SQFS_COMP_LZMA:
- min_level = SQFS_LZMA_MIN_LEVEL;
- max_level = SQFS_LZMA_MAX_LEVEL;
- flags = lzma_flags;
- num_flags = sizeof(lzma_flags) / sizeof(lzma_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)
+ if (opt < 0) {
+ if (set_flag(cfg, value))
goto fail_opt;
+ continue;
+ }
- 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;
+ if (!(opt_available[cfg->id] & (1 << opt)))
+ goto fail_opt;
- cfg->level = level;
- break;
- case OPT_ALG:
- if (cfg->id != SQFS_COMP_LZO)
- goto fail_opt;
-
- if (value == NULL)
- goto fail_value;
+ if (value == NULL)
+ goto fail_value;
+ if (opt == OPT_ALG) {
if (find_lzo_alg(cfg, value))
goto fail_lzo_alg;
- break;
- case OPT_DICT:
- if (cfg->id != SQFS_COMP_XZ &&
- cfg->id != SQFS_COMP_LZMA) {
- goto fail_opt;
- }
-
- if (value == NULL)
- goto fail_value;
+ continue;
+ }
+ if (opt == OPT_DICT) {
if (parse_size("Parsing LZMA dictionary size",
- &dict_size, value, cfg->block_size)) {
+ &szval, value, cfg->block_size)) {
return -1;
}
+ ival = szval;
+ } else {
+ ival = strtol(value, NULL, 10);
+ }
- cfg->opt.xz.dict_size = dict_size;
- break;
- case OPT_LC:
- if (cfg->id != SQFS_COMP_XZ &&
- cfg->id != SQFS_COMP_LZMA) {
- goto fail_opt;
- }
-
- if (value == NULL)
- goto fail_value;
-
- cfg->opt.xz.lc = strtol(value, NULL, 10);
- if (cfg->opt.xz.lc > SQFS_XZ_MAX_LC)
- goto fail_lc;
- break;
- case OPT_LP:
- if (cfg->id != SQFS_COMP_XZ &&
- cfg->id != SQFS_COMP_LZMA) {
- goto fail_opt;
- }
-
- if (value == NULL)
- goto fail_value;
-
- cfg->opt.xz.lp = strtol(value, NULL, 10);
- if (cfg->opt.xz.lp > SQFS_XZ_MAX_LP)
- goto fail_lp;
- break;
- case OPT_PB:
- if (cfg->id != SQFS_COMP_XZ &&
- cfg->id != SQFS_COMP_LZMA) {
- goto fail_opt;
- }
-
- if (value == NULL)
- goto fail_value;
+ if (ival < value_range[cfg->id][opt].min)
+ goto fail_range;
+ if (ival > value_range[cfg->id][opt].max)
+ goto fail_range;
- cfg->opt.xz.pb = strtol(value, NULL, 10);
- if (cfg->opt.xz.lp > SQFS_XZ_MAX_PB)
- goto fail_pb;
- break;
- default:
- if (set_flag(cfg, value, flags, num_flags))
- goto fail_opt;
- break;
+ switch (opt) {
+ case OPT_LEVEL: cfg->level = ival; break;
+ case OPT_LC: cfg->opt.xz.lc = ival; break;
+ case OPT_LP: cfg->opt.xz.lp = ival; break;
+ case OPT_PB: cfg->opt.xz.pb = ival; break;
+ case OPT_WINDOW: cfg->opt.gzip.window_size = ival; break;
+ case OPT_DICT: cfg->opt.xz.dict_size = ival; break;
}
}
@@ -271,29 +222,13 @@ int compressor_cfg_init_options(sqfs_compressor_config_t *cfg,
fail_sum_lp_lc:
fputs("Sum of XZ lc + lp must not exceed 4.\n", stderr);
return -1;
-fail_lp:
- fprintf(stderr,
- "XZ literal position bits (lp) must be between %d and %d.\n",
- SQFS_XZ_MIN_LP, SQFS_XZ_MAX_LP);
- return -1;
-fail_lc:
- fprintf(stderr, "XZ literal context (lc) must be between %d and %d.\n",
- SQFS_XZ_MIN_LC, SQFS_XZ_MAX_LC);
- return -1;
-fail_pb:
- fprintf(stderr, "XZ position bits (bp) must be between %d and %d.\n",
- SQFS_XZ_MIN_PB, SQFS_XZ_MAX_PB);
- return -1;
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 " PRI_SZ " and "
- PRI_SZ ".\n", min_level, max_level);
+fail_range:
+ fprintf(stderr, "`%s` must be a number between %d and %d.\n",
+ token[opt], value_range[cfg->id][opt].min,
+ value_range[cfg->id][opt].max);
return -1;
fail_opt:
fprintf(stderr, "Unknown compressor option '%s'.\n", value);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 22:04:06 +0000