Lei Wen | 88d52c6 | 2012-09-28 04:26:46 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * (C) Copyright 2012 |
| 3 | * Lei Wen <leiwen@marvell.com>, Marvell Inc. |
| 4 | * |
| 5 | * See file CREDITS for list of people who contributed to this |
| 6 | * project. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License as |
| 10 | * published by the Free Software Foundation; either version 2 of |
| 11 | * the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 21 | * MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | #include <common.h> |
| 25 | #include <watchdog.h> |
| 26 | #include <command.h> |
| 27 | #include <image.h> |
| 28 | #include <malloc.h> |
| 29 | #include <u-boot/zlib.h> |
| 30 | #include "zlib/zutil.h" |
| 31 | |
| 32 | #ifndef CONFIG_GZIP_COMPRESS_DEF_SZ |
| 33 | #define CONFIG_GZIP_COMPRESS_DEF_SZ 0x200 |
| 34 | #endif |
| 35 | #define ZALLOC_ALIGNMENT 16 |
| 36 | |
| 37 | static void *zalloc(void *x, unsigned items, unsigned size) |
| 38 | { |
| 39 | void *p; |
| 40 | |
| 41 | size *= items; |
| 42 | size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1); |
| 43 | |
| 44 | p = malloc (size); |
| 45 | |
| 46 | return (p); |
| 47 | } |
| 48 | |
| 49 | static void zfree(void *x, void *addr, unsigned nb) |
| 50 | { |
| 51 | free (addr); |
| 52 | } |
| 53 | |
| 54 | int gzip(void *dst, unsigned long *lenp, |
| 55 | unsigned char *src, unsigned long srclen) |
| 56 | { |
| 57 | return zzip(dst, lenp, src, srclen, 1, NULL); |
| 58 | } |
| 59 | |
| 60 | /* |
| 61 | * Compress blocks with zlib |
| 62 | */ |
| 63 | int zzip(void *dst, unsigned long *lenp, unsigned char *src, |
| 64 | unsigned long srclen, int stoponerr, |
| 65 | int (*func)(unsigned long, unsigned long)) |
| 66 | { |
| 67 | z_stream s; |
| 68 | int r, flush, orig, window; |
| 69 | unsigned long comp_len, left_len; |
| 70 | |
| 71 | if (!srclen) |
| 72 | return 0; |
| 73 | |
| 74 | #ifndef CONFIG_GZIP |
| 75 | window = MAX_WBITS; |
| 76 | #else |
| 77 | window = 2 * MAX_WBITS; |
| 78 | #endif |
| 79 | orig = *lenp; |
| 80 | s.zalloc = zalloc; |
| 81 | s.zfree = zfree; |
| 82 | s.opaque = Z_NULL; |
| 83 | |
| 84 | r = deflateInit2_(&s, Z_BEST_SPEED, Z_DEFLATED, window, |
| 85 | DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY, |
| 86 | ZLIB_VERSION, sizeof(z_stream)); |
| 87 | if (r != Z_OK) { |
| 88 | printf ("Error: deflateInit2_() returned %d\n", r); |
| 89 | return -1; |
| 90 | } |
| 91 | |
| 92 | while (srclen > 0) { |
| 93 | comp_len = (srclen > CONFIG_GZIP_COMPRESS_DEF_SZ) ? |
| 94 | CONFIG_GZIP_COMPRESS_DEF_SZ : srclen; |
| 95 | |
| 96 | s.next_in = src; |
| 97 | s.avail_in = comp_len; |
| 98 | flush = (srclen > CONFIG_GZIP_COMPRESS_DEF_SZ)? |
| 99 | Z_NO_FLUSH : Z_FINISH; |
| 100 | |
| 101 | do { |
| 102 | left_len = (*lenp > CONFIG_GZIP_COMPRESS_DEF_SZ) ? |
| 103 | CONFIG_GZIP_COMPRESS_DEF_SZ : *lenp; |
| 104 | s.next_out = dst; |
| 105 | s.avail_out = left_len; |
| 106 | r = deflate(&s, flush); |
| 107 | if (r == Z_STREAM_ERROR && stoponerr == 1) { |
| 108 | printf("Error: deflate() returned %d\n", r); |
| 109 | r = -1; |
| 110 | goto bail; |
| 111 | } |
| 112 | if (!func) { |
| 113 | dst += (left_len - s.avail_out); |
| 114 | *lenp -= (left_len - s.avail_out); |
| 115 | } else if (left_len - s.avail_out > 0) { |
| 116 | r = func((unsigned long)dst, |
| 117 | left_len - s.avail_out); |
| 118 | if (r < 0) |
| 119 | goto bail; |
| 120 | } |
| 121 | } while (s.avail_out == 0 && (*lenp > 0)); |
| 122 | if (s.avail_in) { |
| 123 | printf("Deflate failed to consume %u bytes", s.avail_in); |
| 124 | r = -1; |
| 125 | goto bail; |
| 126 | } |
| 127 | if (*lenp == 0) { |
| 128 | printf("Deflate need more space to compress " |
| 129 | "left %lu bytes\n", srclen); |
| 130 | r = -1; |
| 131 | goto bail; |
| 132 | } |
| 133 | srclen -= comp_len; |
| 134 | src += comp_len; |
| 135 | } |
| 136 | |
| 137 | r = 0; |
| 138 | bail: |
| 139 | deflateEnd(&s); |
| 140 | *lenp = orig - *lenp; |
| 141 | return r; |
| 142 | } |