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lib/gzip.c
2.6 KB
88d52c6af lib: add gzip lib... |
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/* * (C) Copyright 2012 * Lei Wen <leiwen@marvell.com>, Marvell Inc. * |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ #include <common.h> #include <watchdog.h> #include <command.h> #include <image.h> #include <malloc.h> |
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#include <memalign.h> |
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#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); |
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p = malloc_cache_aligned(size); |
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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 ", 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 ", 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 ", srclen); r = -1; goto bail; } srclen -= comp_len; src += comp_len; } r = 0; bail: deflateEnd(&s); *lenp = orig - *lenp; return r; } |