diff options
| -rw-r--r-- | include/common.h | 7 | ||||
| -rw-r--r-- | lib/Makefile | 1 | ||||
| -rw-r--r-- | lib/gzip.c | 142 |
3 files changed, 150 insertions, 0 deletions
diff --git a/include/common.h b/include/common.h index 55025c0..a7fb05e 100644 --- a/include/common.h +++ b/include/common.h @@ -829,6 +829,13 @@ void fputc(int file, const char c); int ftstc(int file); int fgetc(int file); +/* lib/gzip.c */ +int gzip(void *dst, unsigned long *lenp, + unsigned char *src, unsigned long srclen); +int zzip(void *dst, unsigned long *lenp, unsigned char *src, + unsigned long srclen, int stoponerr, + int (*func)(unsigned long, unsigned long)); + /* lib/net_utils.c */ #include <net.h> static inline IPaddr_t getenv_IPaddr(char *var) diff --git a/lib/Makefile b/lib/Makefile index c60c380..45798de 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -42,6 +42,7 @@ COBJS-y += errno.o COBJS-$(CONFIG_OF_CONTROL) += fdtdec.o COBJS-$(CONFIG_TEST_FDTDEC) += fdtdec_test.o COBJS-$(CONFIG_GZIP) += gunzip.o +COBJS-$(CONFIG_GZIP_COMPRESSED) += gzip.o COBJS-y += hashtable.o COBJS-$(CONFIG_LMB) += lmb.o COBJS-y += ldiv.o diff --git a/lib/gzip.c b/lib/gzip.c new file mode 100644 index 0000000..a83f4af --- /dev/null +++ b/lib/gzip.c @@ -0,0 +1,142 @@ +/* + * (C) Copyright 2012 + * Lei Wen <leiwen@marvell.com>, Marvell Inc. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <watchdog.h> +#include <command.h> +#include <image.h> +#include <malloc.h> +#include <u-boot/zlib.h> +#include "zlib/zutil.h" + +#ifndef CONFIG_GZIP_COMPRESS_DEF_SZ +#define CONFIG_GZIP_COMPRESS_DEF_SZ 0x200 +#endif +#define ZALLOC_ALIGNMENT 16 + +static void *zalloc(void *x, unsigned items, unsigned size) +{ + void *p; + + size *= items; + size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1); + + p = malloc (size); + + return (p); +} + +static void zfree(void *x, void *addr, unsigned nb) +{ + free (addr); +} + +int gzip(void *dst, unsigned long *lenp, + unsigned char *src, unsigned long srclen) +{ + return zzip(dst, lenp, src, srclen, 1, NULL); +} + +/* + * Compress blocks with zlib + */ +int zzip(void *dst, unsigned long *lenp, unsigned char *src, + unsigned long srclen, int stoponerr, + int (*func)(unsigned long, unsigned long)) +{ + z_stream s; + int r, flush, orig, window; + unsigned long comp_len, left_len; + + if (!srclen) + return 0; + +#ifndef CONFIG_GZIP + window = MAX_WBITS; +#else + window = 2 * MAX_WBITS; +#endif + orig = *lenp; + s.zalloc = zalloc; + s.zfree = zfree; + s.opaque = Z_NULL; + + r = deflateInit2_(&s, Z_BEST_SPEED, Z_DEFLATED, window, + DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY, + ZLIB_VERSION, sizeof(z_stream)); + if (r != Z_OK) { + printf ("Error: deflateInit2_() returned %d\n", r); + return -1; + } + + while (srclen > 0) { + comp_len = (srclen > CONFIG_GZIP_COMPRESS_DEF_SZ) ? + CONFIG_GZIP_COMPRESS_DEF_SZ : srclen; + + s.next_in = src; + s.avail_in = comp_len; + flush = (srclen > CONFIG_GZIP_COMPRESS_DEF_SZ)? + Z_NO_FLUSH : Z_FINISH; + + do { + left_len = (*lenp > CONFIG_GZIP_COMPRESS_DEF_SZ) ? + CONFIG_GZIP_COMPRESS_DEF_SZ : *lenp; + s.next_out = dst; + s.avail_out = left_len; + r = deflate(&s, flush); + if (r == Z_STREAM_ERROR && stoponerr == 1) { + printf("Error: deflate() returned %d\n", r); + r = -1; + goto bail; + } + if (!func) { + dst += (left_len - s.avail_out); + *lenp -= (left_len - s.avail_out); + } else if (left_len - s.avail_out > 0) { + r = func((unsigned long)dst, + left_len - s.avail_out); + if (r < 0) + goto bail; + } + } while (s.avail_out == 0 && (*lenp > 0)); + if (s.avail_in) { + printf("Deflate failed to consume %u bytes", s.avail_in); + r = -1; + goto bail; + } + if (*lenp == 0) { + printf("Deflate need more space to compress " + "left %lu bytes\n", srclen); + r = -1; + goto bail; + } + srclen -= comp_len; + src += comp_len; + } + + r = 0; +bail: + deflateEnd(&s); + *lenp = orig - *lenp; + return r; +} |