0c670fc148
As part of the effort to remove things from common.h, create a new header for the gzip functions. Move the function declarations to it and add missing documentation. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
128 lines
2.6 KiB
C
128 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2012
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* Lei Wen <leiwen@marvell.com>, Marvell Inc.
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*/
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#include <common.h>
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#include <watchdog.h>
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#include <command.h>
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#include <gzip.h>
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#include <image.h>
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#include <malloc.h>
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#include <memalign.h>
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#include <u-boot/zlib.h>
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#include "zlib/zutil.h"
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#ifndef CONFIG_GZIP_COMPRESS_DEF_SZ
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#define CONFIG_GZIP_COMPRESS_DEF_SZ 0x200
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#endif
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#define ZALLOC_ALIGNMENT 16
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static void *zalloc(void *x, unsigned items, unsigned size)
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{
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void *p;
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size *= items;
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size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
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p = malloc_cache_aligned(size);
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return (p);
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}
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static void zfree(void *x, void *addr, unsigned nb)
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{
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free (addr);
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}
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int gzip(void *dst, unsigned long *lenp,
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unsigned char *src, unsigned long srclen)
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{
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return zzip(dst, lenp, src, srclen, 1, NULL);
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}
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/*
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* Compress blocks with zlib
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*/
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int zzip(void *dst, unsigned long *lenp, unsigned char *src,
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unsigned long srclen, int stoponerr,
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int (*func)(unsigned long, unsigned long))
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{
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z_stream s;
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int r, flush, orig, window;
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unsigned long comp_len, left_len;
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if (!srclen)
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return 0;
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#ifndef CONFIG_GZIP
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window = MAX_WBITS;
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#else
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window = 2 * MAX_WBITS;
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#endif
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orig = *lenp;
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s.zalloc = zalloc;
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s.zfree = zfree;
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s.opaque = Z_NULL;
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r = deflateInit2_(&s, Z_BEST_SPEED, Z_DEFLATED, window,
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DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY,
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ZLIB_VERSION, sizeof(z_stream));
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if (r != Z_OK) {
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printf ("Error: deflateInit2_() returned %d\n", r);
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return -1;
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}
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while (srclen > 0) {
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comp_len = (srclen > CONFIG_GZIP_COMPRESS_DEF_SZ) ?
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CONFIG_GZIP_COMPRESS_DEF_SZ : srclen;
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s.next_in = src;
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s.avail_in = comp_len;
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flush = (srclen > CONFIG_GZIP_COMPRESS_DEF_SZ)?
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Z_NO_FLUSH : Z_FINISH;
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do {
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left_len = (*lenp > CONFIG_GZIP_COMPRESS_DEF_SZ) ?
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CONFIG_GZIP_COMPRESS_DEF_SZ : *lenp;
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s.next_out = dst;
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s.avail_out = left_len;
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r = deflate(&s, flush);
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if (r == Z_STREAM_ERROR && stoponerr == 1) {
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printf("Error: deflate() returned %d\n", r);
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r = -1;
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goto bail;
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}
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if (!func) {
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dst += (left_len - s.avail_out);
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*lenp -= (left_len - s.avail_out);
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} else if (left_len - s.avail_out > 0) {
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r = func((unsigned long)dst,
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left_len - s.avail_out);
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if (r < 0)
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goto bail;
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}
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} while (s.avail_out == 0 && (*lenp > 0));
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if (s.avail_in) {
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printf("Deflate failed to consume %u bytes", s.avail_in);
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r = -1;
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goto bail;
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}
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if (*lenp == 0) {
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printf("Deflate need more space to compress "
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"left %lu bytes\n", srclen);
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r = -1;
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goto bail;
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}
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srclen -= comp_len;
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src += comp_len;
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}
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r = 0;
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bail:
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deflateEnd(&s);
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*lenp = orig - *lenp;
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return r;
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}
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