From 2ae5473c47e1d6fdb2812e047768c0a12911de43 Mon Sep 17 00:00:00 2001 From: Tobias Diedrich Date: Wed, 21 Oct 2015 00:20:35 +0200 Subject: [PATCH] Drop in tinflate lib. Adds compatibility-macro for crc32. Setting first arg (crc) to anything but 0 is not supported, but all callers already conform to this. This is asserted at compile time through macro trickery. Reduces uncompressed code size by ~1KB: Without this change: Data Size: 127348 Bytes = 124.36 kB = 0.12 MB After this change: Data Size: 126084 Bytes = 123.13 kB = 0.12 MB --- u-boot/include/common.h | 5 +- u-boot/include/crc32.h | 6 - u-boot/include/tinf.h | 52 ++++ u-boot/lib_generic/crc32.c | 216 ++++------------ u-boot/lib_generic/tinfcrc32.c | 64 +++++ u-boot/lib_generic/tinfgzip.c | 137 ++++++++++ u-boot/lib_generic/tinflate.c | 457 +++++++++++++++++++++++++++++++++ u-boot/tools/mkimage.c | 5 +- 8 files changed, 769 insertions(+), 173 deletions(-) delete mode 100644 u-boot/include/crc32.h create mode 100644 u-boot/include/tinf.h create mode 100644 u-boot/lib_generic/tinfcrc32.c create mode 100644 u-boot/lib_generic/tinfgzip.c create mode 100644 u-boot/lib_generic/tinflate.c diff --git a/u-boot/include/common.h b/u-boot/include/common.h index 652e731..3ff0255 100644 --- a/u-boot/include/common.h +++ b/u-boot/include/common.h @@ -535,8 +535,9 @@ int sprintf(char * buf, const char *fmt, ...); int vsprintf(char *buf, const char *fmt, va_list args); /* lib_generic/crc32.c */ -ulong crc32 (ulong, const unsigned char *, uint); -ulong crc32_no_comp (ulong, const unsigned char *, uint); +/* Hack: Forces compilation failure if must_be_zero is not zero. */ +#define crc32(must_be_zero, buf, len) \ + tinf_crc32(buf, len*(sizeof(char[1 - 2*!!(must_be_zero)]))) /* common/console.c */ int console_init_f(void); /* Before relocation; uses the serial stuff */ diff --git a/u-boot/include/crc32.h b/u-boot/include/crc32.h deleted file mode 100644 index 2406d95..0000000 --- a/u-boot/include/crc32.h +++ /dev/null @@ -1,6 +0,0 @@ -#ifndef _CRC32_H_ -#define _CRC32_H_ - -extern unsigned long crc32 (unsigned long crc, const unsigned char *buf, unsigned int len); - -#endif /* _CRC32_H_ */ diff --git a/u-boot/include/tinf.h b/u-boot/include/tinf.h new file mode 100644 index 0000000..1dc1666 --- /dev/null +++ b/u-boot/include/tinf.h @@ -0,0 +1,52 @@ +/* + * tinf - tiny inflate library (inflate, gzip, zlib) + * + * version 1.00 + * + * Copyright (c) 2003 by Joergen Ibsen / Jibz + * All Rights Reserved + * + * http://www.ibsensoftware.com/ + */ + +#ifndef TINF_H_INCLUDED +#define TINF_H_INCLUDED + +/* calling convention */ +#ifndef TINFCC + #ifdef __WATCOMC__ + #define TINFCC __cdecl + #else + #define TINFCC + #endif +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +#define TINF_OK 0 +#define TINF_DATA_ERROR (-3) + +/* function prototypes */ + +void TINFCC tinf_init(); + +int TINFCC tinf_uncompress(void *dest, unsigned int *destLen, + const void *source, unsigned int sourceLen); + +int TINFCC tinf_gzip_uncompress(void *dest, unsigned int *destLen, + const void *source, unsigned int sourceLen); + +int TINFCC tinf_zlib_uncompress(void *dest, unsigned int *destLen, + const void *source, unsigned int sourceLen); + +unsigned int TINFCC tinf_adler32(const void *data, unsigned int length); + +unsigned int TINFCC tinf_crc32(const void *data, unsigned int length); + +#ifdef __cplusplus +} /* extern "C" */ +#endif + +#endif /* TINF_H_INCLUDED */ diff --git a/u-boot/lib_generic/crc32.c b/u-boot/lib_generic/crc32.c index a7f20d6..fce7d33 100644 --- a/u-boot/lib_generic/crc32.c +++ b/u-boot/lib_generic/crc32.c @@ -1,176 +1,64 @@ /* - * This file is derived from crc32.c from the zlib-1.1.3 distribution - * by Jean-loup Gailly and Mark Adler. + * CRC32 checksum + * + * Copyright (c) 1998-2003 by Joergen Ibsen / Jibz + * All Rights Reserved + * + * http://www.ibsensoftware.com/ + * + * This software is provided 'as-is', without any express + * or implied warranty. In no event will the authors be + * held liable for any damages arising from the use of + * this software. + * + * Permission is granted to anyone to use this software + * for any purpose, including commercial applications, + * and to alter it and redistribute it freely, subject to + * the following restrictions: + * + * 1. The origin of this software must not be + * misrepresented; you must not claim that you + * wrote the original software. If you use this + * software in a product, an acknowledgment in + * the product documentation would be appreciated + * but is not required. + * + * 2. Altered source versions must be plainly marked + * as such, and must not be misrepresented as + * being the original software. + * + * 3. This notice may not be removed or altered from + * any source distribution. */ -/* crc32.c -- compute the CRC-32 of a data stream - * Copyright (C) 1995-1998 Mark Adler - * For conditions of distribution and use, see copyright notice in zlib.h - */ - -#ifndef USE_HOSTCC /* Shut down "ANSI does not permit..." warnings */ -#include /* to get command definitions like CFG_CMD_JFFS2 */ -#endif - -#include "crc32.h" - -#define local static -#define ZEXPORT /* empty */ -#define uLong unsigned long -#define uLongf uLong -#define uInt unsigned int -#define Bytef unsigned char -unsigned long crc32 (unsigned long, const unsigned char *, unsigned int); - -#ifdef DYNAMIC_CRC_TABLE - -local int crc_table_empty = 1; -local uLongf crc_table[256]; -local void make_crc_table OF((void)); - /* - Generate a table for a byte-wise 32-bit CRC calculation on the polynomial: - x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1. - - Polynomials over GF(2) are represented in binary, one bit per coefficient, - with the lowest powers in the most significant bit. Then adding polynomials - is just exclusive-or, and multiplying a polynomial by x is a right shift by - one. If we call the above polynomial p, and represent a byte as the - polynomial q, also with the lowest power in the most significant bit (so the - byte 0xb1 is the polynomial x^7+x^3+x+1), then the CRC is (q*x^32) mod p, - where a mod b means the remainder after dividing a by b. - - This calculation is done using the shift-register method of multiplying and - taking the remainder. The register is initialized to zero, and for each - incoming bit, x^32 is added mod p to the register if the bit is a one (where - x^32 mod p is p+x^32 = x^26+...+1), and the register is multiplied mod p by - x (which is shifting right by one and adding x^32 mod p if the bit shifted - out is a one). We start with the highest power (least significant bit) of - q and repeat for all eight bits of q. - - The table is simply the CRC of all possible eight bit values. This is all - the information needed to generate CRC's on data a byte at a time for all - combinations of CRC register values and incoming bytes. -*/ -local void make_crc_table() -{ - uLong c; - int n, k; - uLong poly; /* polynomial exclusive-or pattern */ - /* terms of polynomial defining this crc (except x^32): */ - static const Byte p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26}; + * CRC32 algorithm taken from the zlib source, which is + * Copyright (C) 1995-1998 Jean-loup Gailly and Mark Adler + */ - /* make exclusive-or pattern from polynomial (0xedb88320L) */ - poly = 0L; - for (n = 0; n < sizeof(p)/sizeof(Byte); n++) - poly |= 1L << (31 - p[n]); +#include "tinf.h" - for (n = 0; n < 256; n++) - { - c = (uLong)n; - for (k = 0; k < 8; k++) - c = c & 1 ? poly ^ (c >> 1) : c >> 1; - crc_table[n] = c; - } - crc_table_empty = 0; -} -#else -/* ======================================================================== - * Table of CRC-32's of all single-byte values (made by make_crc_table) - */ -local const uLongf crc_table[256] = { - 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L, - 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L, - 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L, - 0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL, - 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L, - 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L, - 0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L, - 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL, - 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L, - 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL, - 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L, - 0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L, - 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L, - 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL, - 0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL, - 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L, - 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL, - 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L, - 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L, - 0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L, - 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL, - 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L, - 0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L, - 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL, - 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L, - 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L, - 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L, - 0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L, - 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L, - 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL, - 0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL, - 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L, - 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L, - 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL, - 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL, - 0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L, - 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL, - 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L, - 0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL, - 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L, - 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL, - 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L, - 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L, - 0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL, - 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L, - 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L, - 0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L, - 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L, - 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L, - 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L, - 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL, - 0x2d02ef8dL +static const unsigned int tinf_crc32tab[16] = { + 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 0x76dc4190, + 0x6b6b51f4, 0x4db26158, 0x5005713c, 0xedb88320, 0xf00f9344, + 0xd6d6a3e8, 0xcb61b38c, 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, + 0xbdbdf21c }; -#endif -#if 0 -/* ========================================================================= - * This function can be used by asm versions of crc32() - */ -const uLongf * ZEXPORT get_crc_table() +unsigned int tinf_crc32(const void *data, unsigned int length) { -#ifdef DYNAMIC_CRC_TABLE - if (crc_table_empty) make_crc_table(); -#endif - return (const uLongf *)crc_table; -} -#endif + const unsigned char *buf = (const unsigned char *)data; + unsigned int crc = 0xffffffff; + unsigned int i; -/* ========================================================================= */ -#define DO1(buf) crc = crc_table[((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8); -#define DO2(buf) DO1(buf); DO1(buf); -#define DO4(buf) DO2(buf); DO2(buf); -#define DO8(buf) DO4(buf); DO4(buf); + if (length == 0) return 0; -/* ========================================================================= */ -uLong ZEXPORT crc32(crc, buf, len) - uLong crc; - const Bytef *buf; - uInt len; -{ -#ifdef DYNAMIC_CRC_TABLE - if (crc_table_empty) - make_crc_table(); -#endif - crc = crc ^ 0xffffffffL; - while (len >= 8) - { - DO8(buf); - len -= 8; - } - if (len) do { - DO1(buf); - } while (--len); - return crc ^ 0xffffffffL; + for (i = 0; i < length; ++i) + { + crc ^= buf[i]; + crc = tinf_crc32tab[crc & 0x0f] ^ (crc >> 4); + crc = tinf_crc32tab[crc & 0x0f] ^ (crc >> 4); + } + + return crc ^ 0xffffffff; } diff --git a/u-boot/lib_generic/tinfcrc32.c b/u-boot/lib_generic/tinfcrc32.c new file mode 100644 index 0000000..fce7d33 --- /dev/null +++ b/u-boot/lib_generic/tinfcrc32.c @@ -0,0 +1,64 @@ +/* + * CRC32 checksum + * + * Copyright (c) 1998-2003 by Joergen Ibsen / Jibz + * All Rights Reserved + * + * http://www.ibsensoftware.com/ + * + * This software is provided 'as-is', without any express + * or implied warranty. In no event will the authors be + * held liable for any damages arising from the use of + * this software. + * + * Permission is granted to anyone to use this software + * for any purpose, including commercial applications, + * and to alter it and redistribute it freely, subject to + * the following restrictions: + * + * 1. The origin of this software must not be + * misrepresented; you must not claim that you + * wrote the original software. If you use this + * software in a product, an acknowledgment in + * the product documentation would be appreciated + * but is not required. + * + * 2. Altered source versions must be plainly marked + * as such, and must not be misrepresented as + * being the original software. + * + * 3. This notice may not be removed or altered from + * any source distribution. + */ + +/* + * CRC32 algorithm taken from the zlib source, which is + * Copyright (C) 1995-1998 Jean-loup Gailly and Mark Adler + */ + +#include "tinf.h" + +static const unsigned int tinf_crc32tab[16] = { + 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 0x76dc4190, + 0x6b6b51f4, 0x4db26158, 0x5005713c, 0xedb88320, 0xf00f9344, + 0xd6d6a3e8, 0xcb61b38c, 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, + 0xbdbdf21c +}; + +unsigned int tinf_crc32(const void *data, unsigned int length) +{ + const unsigned char *buf = (const unsigned char *)data; + unsigned int crc = 0xffffffff; + unsigned int i; + + if (length == 0) return 0; + + for (i = 0; i < length; ++i) + { + crc ^= buf[i]; + crc = tinf_crc32tab[crc & 0x0f] ^ (crc >> 4); + crc = tinf_crc32tab[crc & 0x0f] ^ (crc >> 4); + } + + return crc ^ 0xffffffff; +} diff --git a/u-boot/lib_generic/tinfgzip.c b/u-boot/lib_generic/tinfgzip.c new file mode 100644 index 0000000..ebc4d9e --- /dev/null +++ b/u-boot/lib_generic/tinfgzip.c @@ -0,0 +1,137 @@ +/* + * tinfgzip - tiny gzip decompressor + * + * Copyright (c) 2003 by Joergen Ibsen / Jibz + * All Rights Reserved + * + * http://www.ibsensoftware.com/ + * + * This software is provided 'as-is', without any express + * or implied warranty. In no event will the authors be + * held liable for any damages arising from the use of + * this software. + * + * Permission is granted to anyone to use this software + * for any purpose, including commercial applications, + * and to alter it and redistribute it freely, subject to + * the following restrictions: + * + * 1. The origin of this software must not be + * misrepresented; you must not claim that you + * wrote the original software. If you use this + * software in a product, an acknowledgment in + * the product documentation would be appreciated + * but is not required. + * + * 2. Altered source versions must be plainly marked + * as such, and must not be misrepresented as + * being the original software. + * + * 3. This notice may not be removed or altered from + * any source distribution. + */ + +#include "tinf.h" +#include + +#define FTEXT 1 +#define FHCRC 2 +#define FEXTRA 4 +#define FNAME 8 +#define FCOMMENT 16 + +int tinf_gzip_uncompress(void *dest, unsigned int *destLen, + const void *source, unsigned int sourceLen) +{ + unsigned char *src = (unsigned char *)source; + unsigned char *dst = (unsigned char *)dest; + unsigned char *start; + unsigned int dlen, crc32; + int res; + unsigned char flg; + + /* -- check format -- */ + + /* check id bytes */ + if (src[0] != 0x1f || src[1] != 0x8b) return TINF_DATA_ERROR; + + /* check method is deflate */ + if (src[2] != 8) return TINF_DATA_ERROR; + + /* get flag byte */ + flg = src[3]; + + /* check that reserved bits are zero */ + if (flg & 0xe0) return TINF_DATA_ERROR; + + /* -- find start of compressed data -- */ + + /* skip base header of 10 bytes */ + start = src + 10; + + /* skip extra data if present */ + if (flg & FEXTRA) + { + unsigned int xlen = start[1]; + xlen = 256*xlen + start[0]; + start += xlen + 2; + } + + /* skip file name if present */ + if (flg & FNAME) { while (*start) ++start; ++start; } + + /* skip file comment if present */ + if (flg & FCOMMENT) { while (*start) ++start; ++start; } + + /* check header crc if present */ + if (flg & FHCRC) + { + unsigned int hcrc = start[1]; + hcrc = 256*hcrc + start[0]; + + if (hcrc != (tinf_crc32(src, start - src) & 0x0000ffff)) + return TINF_DATA_ERROR; + + start += 2; + } + + /* -- get decompressed length -- */ + + dlen = src[sourceLen - 1]; + dlen = 256*dlen + src[sourceLen - 2]; + dlen = 256*dlen + src[sourceLen - 3]; + dlen = 256*dlen + src[sourceLen - 4]; + + /* -- get crc32 of decompressed data -- */ + + crc32 = src[sourceLen - 5]; + crc32 = 256*crc32 + src[sourceLen - 6]; + crc32 = 256*crc32 + src[sourceLen - 7]; + crc32 = 256*crc32 + src[sourceLen - 8]; + + /* -- decompress data -- */ + + res = tinf_uncompress(dst, destLen, start, src + sourceLen - start - 8); + + if (res != TINF_OK) { + puts("uncompress error"); + return TINF_DATA_ERROR; + } + +#if 0 + if (*destLen != dlen) { + printf("len error %d != %d", *destLen, dlen); + return TINF_DATA_ERROR; + } + + /* -- check CRC32 checksum -- */ + + if (crc32 != tinf_crc32(dst, *destLen)) { + return TINF_DATA_ERROR; + } +#endif + printf("expected len %08x vs decoded %08x\n", dlen, *destLen); + printf("expected crc32 %08x vs calculated %08x\n", crc32, tinf_crc32(dst, *destLen)); + + return TINF_OK; +} diff --git a/u-boot/lib_generic/tinflate.c b/u-boot/lib_generic/tinflate.c new file mode 100644 index 0000000..b2bec56 --- /dev/null +++ b/u-boot/lib_generic/tinflate.c @@ -0,0 +1,457 @@ +/* + * tinflate - tiny inflate + * + * Copyright (c) 2003 by Joergen Ibsen / Jibz + * All Rights Reserved + * + * http://www.ibsensoftware.com/ + * + * This software is provided 'as-is', without any express + * or implied warranty. In no event will the authors be + * held liable for any damages arising from the use of + * this software. + * + * Permission is granted to anyone to use this software + * for any purpose, including commercial applications, + * and to alter it and redistribute it freely, subject to + * the following restrictions: + * + * 1. The origin of this software must not be + * misrepresented; you must not claim that you + * wrote the original software. If you use this + * software in a product, an acknowledgment in + * the product documentation would be appreciated + * but is not required. + * + * 2. Altered source versions must be plainly marked + * as such, and must not be misrepresented as + * being the original software. + * + * 3. This notice may not be removed or altered from + * any source distribution. + */ + +#include "tinf.h" + +/* ------------------------------ * + * -- internal data structures -- * + * ------------------------------ */ + +typedef struct { + unsigned short table[16]; /* table of code length counts */ + unsigned short trans[288]; /* code -> symbol translation table */ +} TINF_TREE; + +typedef struct { + const unsigned char *source; + unsigned int tag; + unsigned int bitcount; + + unsigned char *dest; + unsigned int *destLen; + + TINF_TREE ltree; /* dynamic length/symbol tree */ + TINF_TREE dtree; /* dynamic distance tree */ +} TINF_DATA; + +/* --------------------------------------------------- * + * -- uninitialized global data (static structures) -- * + * --------------------------------------------------- */ + +TINF_TREE sltree; /* fixed length/symbol tree */ +TINF_TREE sdtree; /* fixed distance tree */ + +/* extra bits and base tables for length codes */ +unsigned char length_bits[30]; +unsigned short length_base[30]; + +/* extra bits and base tables for distance codes */ +unsigned char dist_bits[30]; +unsigned short dist_base[30]; + +/* special ordering of code length codes */ +const unsigned char clcidx[] = { + 16, 17, 18, 0, 8, 7, 9, 6, + 10, 5, 11, 4, 12, 3, 13, 2, + 14, 1, 15 +}; + +/* ----------------------- * + * -- utility functions -- * + * ----------------------- */ + +/* build extra bits and base tables */ +static void tinf_build_bits_base(unsigned char *bits, unsigned short *base, int delta, int first) +{ + int i, sum; + + /* build bits table */ + for (i = 0; i < delta; ++i) bits[i] = 0; + for (i = 0; i < 30 - delta; ++i) bits[i + delta] = i / delta; + + /* build base table */ + for (sum = first, i = 0; i < 30; ++i) + { + base[i] = sum; + sum += 1 << bits[i]; + } +} + +/* build the fixed huffman trees */ +static void tinf_build_fixed_trees(TINF_TREE *lt, TINF_TREE *dt) +{ + int i; + + /* build fixed length tree */ + for (i = 0; i < 7; ++i) lt->table[i] = 0; + + lt->table[7] = 24; + lt->table[8] = 152; + lt->table[9] = 112; + + for (i = 0; i < 24; ++i) lt->trans[i] = 256 + i; + for (i = 0; i < 144; ++i) lt->trans[24 + i] = i; + for (i = 0; i < 8; ++i) lt->trans[24 + 144 + i] = 280 + i; + for (i = 0; i < 112; ++i) lt->trans[24 + 144 + 8 + i] = 144 + i; + + /* build fixed distance tree */ + for (i = 0; i < 5; ++i) dt->table[i] = 0; + + dt->table[5] = 32; + + for (i = 0; i < 32; ++i) dt->trans[i] = i; +} + +/* given an array of code lengths, build a tree */ +static void tinf_build_tree(TINF_TREE *t, const unsigned char *lengths, unsigned int num) +{ + unsigned short offs[16]; + unsigned int i, sum; + + /* clear code length count table */ + for (i = 0; i < 16; ++i) t->table[i] = 0; + + /* scan symbol lengths, and sum code length counts */ + for (i = 0; i < num; ++i) t->table[lengths[i]]++; + + t->table[0] = 0; + + /* compute offset table for distribution sort */ + for (sum = 0, i = 0; i < 16; ++i) + { + offs[i] = sum; + sum += t->table[i]; + } + + /* create code->symbol translation table (symbols sorted by code) */ + for (i = 0; i < num; ++i) + { + if (lengths[i]) t->trans[offs[lengths[i]]++] = i; + } +} + +/* ---------------------- * + * -- decode functions -- * + * ---------------------- */ + +/* get one bit from source stream */ +static int tinf_getbit(TINF_DATA *d) +{ + unsigned int bit; + + /* check if tag is empty */ + if (!d->bitcount--) + { + /* load next tag */ + d->tag = *d->source++; + d->bitcount = 7; + } + + /* shift bit out of tag */ + bit = d->tag & 0x01; + d->tag >>= 1; + + return bit; +} + +/* read a num bit value from a stream and add base */ +static unsigned int tinf_read_bits(TINF_DATA *d, int num, int base) +{ + unsigned int val = 0; + + /* read num bits */ + if (num) + { + unsigned int limit = 1 << (num); + unsigned int mask; + + for (mask = 1; mask < limit; mask *= 2) + if (tinf_getbit(d)) val += mask; + } + + return val + base; +} + +/* given a data stream and a tree, decode a symbol */ +static int tinf_decode_symbol(TINF_DATA *d, TINF_TREE *t) +{ + int sum = 0, cur = 0, len = 0; + + /* get more bits while code value is above sum */ + do { + + cur = 2*cur + tinf_getbit(d); + + ++len; + + sum += t->table[len]; + cur -= t->table[len]; + + } while (cur >= 0); + + return t->trans[sum + cur]; +} + +/* given a data stream, decode dynamic trees from it */ +static void tinf_decode_trees(TINF_DATA *d, TINF_TREE *lt, TINF_TREE *dt) +{ + TINF_TREE code_tree; + unsigned char lengths[288+32]; + unsigned int hlit, hdist, hclen; + unsigned int i, num, length; + + /* get 5 bits HLIT (257-286) */ + hlit = tinf_read_bits(d, 5, 257); + + /* get 5 bits HDIST (1-32) */ + hdist = tinf_read_bits(d, 5, 1); + + /* get 4 bits HCLEN (4-19) */ + hclen = tinf_read_bits(d, 4, 4); + + for (i = 0; i < 19; ++i) lengths[i] = 0; + + /* read code lengths for code length alphabet */ + for (i = 0; i < hclen; ++i) + { + /* get 3 bits code length (0-7) */ + unsigned int clen = tinf_read_bits(d, 3, 0); + + lengths[clcidx[i]] = clen; + } + + /* build code length tree */ + tinf_build_tree(&code_tree, lengths, 19); + + /* decode code lengths for the dynamic trees */ + for (num = 0; num < hlit + hdist; ) + { + int sym = tinf_decode_symbol(d, &code_tree); + + switch (sym) + { + case 16: + /* copy previous code length 3-6 times (read 2 bits) */ + { + unsigned char prev = lengths[num - 1]; + for (length = tinf_read_bits(d, 2, 3); length; --length) + { + lengths[num++] = prev; + } + } + break; + case 17: + /* repeat code length 0 for 3-10 times (read 3 bits) */ + for (length = tinf_read_bits(d, 3, 3); length; --length) + { + lengths[num++] = 0; + } + break; + case 18: + /* repeat code length 0 for 11-138 times (read 7 bits) */ + for (length = tinf_read_bits(d, 7, 11); length; --length) + { + lengths[num++] = 0; + } + break; + default: + /* values 0-15 represent the actual code lengths */ + lengths[num++] = sym; + break; + } + } + + /* build dynamic trees */ + tinf_build_tree(lt, lengths, hlit); + tinf_build_tree(dt, lengths + hlit, hdist); +} + +/* ----------------------------- * + * -- block inflate functions -- * + * ----------------------------- */ + +/* given a stream and two trees, inflate a block of data */ +static int tinf_inflate_block_data(TINF_DATA *d, TINF_TREE *lt, TINF_TREE *dt) +{ + /* remember current output position */ + unsigned char *start = d->dest; + + while (1) + { + int sym = tinf_decode_symbol(d, lt); + + /* check for end of block */ + if (sym == 256) + { + *d->destLen += d->dest - start; + return TINF_OK; + } + + if (sym < 256) + { + *d->dest++ = sym; + + } else { + + int length, dist, offs; + int i; + + sym -= 257; + + /* possibly get more bits from length code */ + length = tinf_read_bits(d, length_bits[sym], length_base[sym]); + + dist = tinf_decode_symbol(d, dt); + + /* possibly get more bits from distance code */ + offs = tinf_read_bits(d, dist_bits[dist], dist_base[dist]); + + /* copy match */ + for (i = 0; i < length; ++i) + { + d->dest[i] = d->dest[i - offs]; + } + + d->dest += length; + } + } +} + +/* inflate an uncompressed block of data */ +static int tinf_inflate_uncompressed_block(TINF_DATA *d) +{ + unsigned int length, invlength; + unsigned int i; + + /* get length */ + length = d->source[1]; + length = 256*length + d->source[0]; + + /* get one's complement of length */ + invlength = d->source[3]; + invlength = 256*invlength + d->source[2]; + + /* check length */ + if (length != (~invlength & 0x0000ffff)) return TINF_DATA_ERROR; + + d->source += 4; + + /* copy block */ + for (i = length; i; --i) *d->dest++ = *d->source++; + + /* make sure we start next block on a byte boundary */ + d->bitcount = 0; + + *d->destLen += length; + + return TINF_OK; +} + +/* inflate a block of data compressed with fixed huffman trees */ +static int tinf_inflate_fixed_block(TINF_DATA *d) +{ + /* decode block using fixed trees */ + return tinf_inflate_block_data(d, &sltree, &sdtree); +} + +/* inflate a block of data compressed with dynamic huffman trees */ +static int tinf_inflate_dynamic_block(TINF_DATA *d) +{ + /* decode trees from stream */ + tinf_decode_trees(d, &d->ltree, &d->dtree); + + /* decode block using decoded trees */ + return tinf_inflate_block_data(d, &d->ltree, &d->dtree); +} + +/* ---------------------- * + * -- public functions -- * + * ---------------------- */ + +/* initialize global (static) data */ +void tinf_init() +{ + /* build fixed huffman trees */ + tinf_build_fixed_trees(&sltree, &sdtree); + + /* build extra bits and base tables */ + tinf_build_bits_base(length_bits, length_base, 4, 3); + tinf_build_bits_base(dist_bits, dist_base, 2, 1); + + /* fix a special case */ + length_bits[28] = 0; + length_base[28] = 258; +} + +/* inflate stream from source to dest */ +int tinf_uncompress(void *dest, unsigned int *destLen, + const void *source, unsigned int sourceLen) +{ + TINF_DATA d; + int bfinal; + + /* initialise data */ + d.source = (const unsigned char *)source; + d.bitcount = 0; + + d.dest = (unsigned char *)dest; + d.destLen = destLen; + + *destLen = 0; + + do { + + unsigned int btype; + int res; + + /* read final block flag */ + bfinal = tinf_getbit(&d); + + /* read block type (2 bits) */ + btype = tinf_read_bits(&d, 2, 0); + + /* decompress block */ + switch (btype) + { + case 0: + /* decompress uncompressed block */ + res = tinf_inflate_uncompressed_block(&d); + break; + case 1: + /* decompress block with fixed huffman trees */ + res = tinf_inflate_fixed_block(&d); + break; + case 2: + /* decompress block with dynamic huffman trees */ + res = tinf_inflate_dynamic_block(&d); + break; + default: + return TINF_DATA_ERROR; + } + + if (res != TINF_OK) return TINF_DATA_ERROR; + + } while (!bfinal); + + return TINF_OK; +} diff --git a/u-boot/tools/mkimage.c b/u-boot/tools/mkimage.c index 4ecda49..de8af90 100644 --- a/u-boot/tools/mkimage.c +++ b/u-boot/tools/mkimage.c @@ -68,7 +68,10 @@ extern int errno; char *cmdname; -extern unsigned long crc32 (unsigned long crc, const char *buf, unsigned int len); +#include +/* Hack: Forces compilation failure if must_be_zero is not zero. */ +#define crc32(must_be_zero, buf, len) \ + tinf_crc32(buf, len*(sizeof(char[1 - 2*!!(must_be_zero)]))) typedef struct table_entry { int val; /* as defined in image.h */ -- 2.25.1