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Diffstat (limited to 'lib/sqfs/comp/gzip.c')
-rw-r--r--lib/sqfs/comp/gzip.c84
1 files changed, 24 insertions, 60 deletions
diff --git a/lib/sqfs/comp/gzip.c b/lib/sqfs/comp/gzip.c
index e80073d..484901a 100644
--- a/lib/sqfs/comp/gzip.c
+++ b/lib/sqfs/comp/gzip.c
@@ -10,7 +10,6 @@
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
-#include <stdio.h>
#include <ctype.h>
#include <zlib.h>
@@ -67,30 +66,24 @@ static int gzip_read_options(sqfs_compressor_t *base, int fd)
{
gzip_compressor_t *gzip = (gzip_compressor_t *)base;
gzip_options_t opt;
+ int ret;
- if (sqfs_generic_read_options(fd, &opt, sizeof(opt)))
- return -1;
+ ret = sqfs_generic_read_options(fd, &opt, sizeof(opt));
+ if (ret)
+ return ret;
gzip->opt.level = le32toh(opt.level);
gzip->opt.window = le16toh(opt.window);
gzip->opt.strategies = le16toh(opt.strategies);
- if (gzip->opt.level < 1 || gzip->opt.level > 9) {
- fprintf(stderr, "Invalid gzip compression level '%d'.\n",
- gzip->opt.level);
- return -1;
- }
+ if (gzip->opt.level < 1 || gzip->opt.level > 9)
+ return SQFS_ERROR_UNSUPPORTED;
- if (gzip->opt.window < 8 || gzip->opt.window > 15) {
- fprintf(stderr, "Invalid gzip window size '%d'.\n",
- gzip->opt.window);
- return -1;
- }
+ if (gzip->opt.window < 8 || gzip->opt.window > 15)
+ return SQFS_ERROR_UNSUPPORTED;
- if (gzip->opt.strategies & ~SQFS_COMP_FLAG_GZIP_ALL) {
- fputs("Unknown gzip strategies selected.\n", stderr);
- return -1;
- }
+ if (gzip->opt.strategies & ~SQFS_COMP_FLAG_GZIP_ALL)
+ return SQFS_ERROR_UNSUPPORTED;
return 0;
}
@@ -124,11 +117,8 @@ static int find_strategy(gzip_compressor_t *gzip, const uint8_t *in,
continue;
ret = deflateReset(&gzip->strm);
- if (ret != Z_OK) {
- fputs("resetting zlib stream failed\n",
- stderr);
- return -1;
- }
+ if (ret != Z_OK)
+ return SQFS_ERROR_COMRPESSOR;
strategy = flag_to_zlib_strategy(i);
@@ -138,11 +128,8 @@ static int find_strategy(gzip_compressor_t *gzip, const uint8_t *in,
gzip->strm.avail_out = outsize;
ret = deflateParams(&gzip->strm, gzip->opt.level, strategy);
- if (ret != Z_OK) {
- fputs("setting deflate parameters failed\n",
- stderr);
- return -1;
- }
+ if (ret != Z_OK)
+ return SQFS_ERROR_COMRPESSOR;
ret = deflate(&gzip->strm, Z_FINISH);
@@ -154,8 +141,7 @@ static int find_strategy(gzip_compressor_t *gzip, const uint8_t *in,
selected = strategy;
}
} else if (ret != Z_OK && ret != Z_BUF_ERROR) {
- fputs("gzip block processing failed\n", stderr);
- return -1;
+ return SQFS_ERROR_COMRPESSOR;
}
}
@@ -172,7 +158,7 @@ static ssize_t gzip_do_block(sqfs_compressor_t *base, const uint8_t *in,
if (gzip->compress && gzip->opt.strategies != 0) {
strategy = find_strategy(gzip, in, size, out, outsize);
if (strategy < 0)
- return -1;
+ return strategy;
}
if (gzip->compress) {
@@ -181,10 +167,8 @@ static ssize_t gzip_do_block(sqfs_compressor_t *base, const uint8_t *in,
ret = inflateReset(&gzip->strm);
}
- if (ret != Z_OK) {
- fputs("resetting zlib stream failed\n", stderr);
- return -1;
- }
+ if (ret != Z_OK)
+ return SQFS_ERROR_COMRPESSOR;
gzip->strm.next_in = (void *)in;
gzip->strm.avail_in = size;
@@ -193,11 +177,8 @@ static ssize_t gzip_do_block(sqfs_compressor_t *base, const uint8_t *in,
if (gzip->compress && gzip->opt.strategies != 0) {
ret = deflateParams(&gzip->strm, gzip->opt.level, strategy);
- if (ret != Z_OK) {
- fputs("setting selcted deflate parameters failed\n",
- stderr);
- return -1;
- }
+ if (ret != Z_OK)
+ return SQFS_ERROR_COMRPESSOR;
}
if (gzip->compress) {
@@ -215,10 +196,8 @@ static ssize_t gzip_do_block(sqfs_compressor_t *base, const uint8_t *in,
return (ssize_t)written;
}
- if (ret != Z_OK && ret != Z_BUF_ERROR) {
- fputs("gzip block processing failed\n", stderr);
- return -1;
- }
+ if (ret != Z_OK && ret != Z_BUF_ERROR)
+ return SQFS_ERROR_COMRPESSOR;
return 0;
}
@@ -228,10 +207,8 @@ static sqfs_compressor_t *gzip_create_copy(sqfs_compressor_t *cmp)
gzip_compressor_t *gzip = malloc(sizeof(*gzip));
int ret;
- if (gzip == NULL) {
- perror("creating additional gzip compressor");
+ if (gzip == NULL)
return NULL;
- }
memcpy(gzip, cmp, sizeof(*gzip));
memset(&gzip->strm, 0, sizeof(gzip->strm));
@@ -244,8 +221,6 @@ static sqfs_compressor_t *gzip_create_copy(sqfs_compressor_t *cmp)
}
if (ret != Z_OK) {
- fputs("internal error creating additional zlib stream\n",
- stderr);
free(gzip);
return NULL;
}
@@ -261,34 +236,24 @@ sqfs_compressor_t *gzip_compressor_create(const sqfs_compressor_config_t *cfg)
if (cfg->flags & ~(SQFS_COMP_FLAG_GZIP_ALL |
SQFS_COMP_FLAG_GENERIC_ALL)) {
- fputs("creating gzip compressor: unknown compressor flags\n",
- stderr);
return NULL;
}
if (cfg->opt.gzip.level < SQFS_GZIP_MIN_LEVEL ||
cfg->opt.gzip.level > SQFS_GZIP_MAX_LEVEL) {
- fprintf(stderr, "creating gzip compressor: compression level"
- "must be between %d and %d inclusive\n",
- SQFS_GZIP_MIN_LEVEL, SQFS_GZIP_MAX_LEVEL);
return NULL;
}
if (cfg->opt.gzip.window_size < SQFS_GZIP_MIN_WINDOW ||
cfg->opt.gzip.window_size > SQFS_GZIP_MAX_WINDOW) {
- fprintf(stderr, "creating gzip compressor: window size"
- "must be between %d and %d inclusive\n",
- SQFS_GZIP_MIN_WINDOW, SQFS_GZIP_MAX_WINDOW);
return NULL;
}
gzip = calloc(1, sizeof(*gzip));
base = (sqfs_compressor_t *)gzip;
- if (gzip == NULL) {
- perror("creating gzip compressor");
+ if (gzip == NULL)
return NULL;
- }
gzip->opt.level = cfg->opt.gzip.level;
gzip->opt.window = cfg->opt.gzip.window_size;
@@ -310,7 +275,6 @@ sqfs_compressor_t *gzip_compressor_create(const sqfs_compressor_config_t *cfg)
}
if (ret != Z_OK) {
- fputs("internal error creating zlib stream\n", stderr);
free(gzip);
return NULL;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-29 11:23:23 +0000