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SkinInstaller: Update zlib to 1.2.8
This commit is contained in:
Birunthan Mohanathas
@@ -1,5 +1,5 @@
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/* crc32.c -- compute the CRC-32 of a data stream
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* Copyright (C) 1995-2006, 2010 Mark Adler
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* Copyright (C) 1995-2006, 2010, 2011, 2012 Mark Adler
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* For conditions of distribution and use, see copyright notice in zlib.h
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*
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* Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster
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@@ -17,6 +17,8 @@
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of the crc tables. Therefore, if you #define DYNAMIC_CRC_TABLE, you should
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first call get_crc_table() to initialize the tables before allowing more than
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one thread to use crc32().
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DYNAMIC_CRC_TABLE and MAKECRCH can be #defined to write out crc32.h.
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*/
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#ifdef MAKECRCH
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@@ -30,31 +32,11 @@
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#define local static
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/* Find a four-byte integer type for crc32_little() and crc32_big(). */
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#ifndef NOBYFOUR
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# ifdef STDC /* need ANSI C limits.h to determine sizes */
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# include <limits.h>
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# define BYFOUR
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# if (UINT_MAX == 0xffffffffUL)
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typedef unsigned int u4;
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# else
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# if (ULONG_MAX == 0xffffffffUL)
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typedef unsigned long u4;
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# else
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# if (USHRT_MAX == 0xffffffffUL)
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typedef unsigned short u4;
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# else
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# undef BYFOUR /* can't find a four-byte integer type! */
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# endif
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# endif
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# endif
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# endif /* STDC */
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#endif /* !NOBYFOUR */
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/* Definitions for doing the crc four data bytes at a time. */
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#if !defined(NOBYFOUR) && defined(Z_U4)
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# define BYFOUR
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#endif
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#ifdef BYFOUR
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# define REV(w) ((((w)>>24)&0xff)+(((w)>>8)&0xff00)+ \
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(((w)&0xff00)<<8)+(((w)&0xff)<<24))
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local unsigned long crc32_little OF((unsigned long,
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const unsigned char FAR *, unsigned));
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local unsigned long crc32_big OF((unsigned long,
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@@ -68,16 +50,16 @@
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local unsigned long gf2_matrix_times OF((unsigned long *mat,
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unsigned long vec));
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local void gf2_matrix_square OF((unsigned long *square, unsigned long *mat));
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local uLong crc32_combine_(uLong crc1, uLong crc2, z_off64_t len2);
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local uLong crc32_combine_ OF((uLong crc1, uLong crc2, z_off64_t len2));
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#ifdef DYNAMIC_CRC_TABLE
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local volatile int crc_table_empty = 1;
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local unsigned long FAR crc_table[TBLS][256];
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local z_crc_t FAR crc_table[TBLS][256];
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local void make_crc_table OF((void));
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#ifdef MAKECRCH
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local void write_table OF((FILE *, const unsigned long FAR *));
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local void write_table OF((FILE *, const z_crc_t FAR *));
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#endif /* MAKECRCH */
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/*
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Generate tables for a byte-wise 32-bit CRC calculation on the polynomial:
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@@ -107,9 +89,9 @@ local void make_crc_table OF((void));
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*/
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local void make_crc_table()
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{
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unsigned long c;
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z_crc_t c;
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int n, k;
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unsigned long poly; /* polynomial exclusive-or pattern */
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z_crc_t poly; /* polynomial exclusive-or pattern */
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/* terms of polynomial defining this crc (except x^32): */
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static volatile int first = 1; /* flag to limit concurrent making */
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static const unsigned char p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};
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@@ -121,13 +103,13 @@ local void make_crc_table()
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first = 0;
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/* make exclusive-or pattern from polynomial (0xedb88320UL) */
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poly = 0UL;
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for (n = 0; n < sizeof(p)/sizeof(unsigned char); n++)
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poly |= 1UL << (31 - p[n]);
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poly = 0;
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for (n = 0; n < (int)(sizeof(p)/sizeof(unsigned char)); n++)
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poly |= (z_crc_t)1 << (31 - p[n]);
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/* generate a crc for every 8-bit value */
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for (n = 0; n < 256; n++) {
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c = (unsigned long)n;
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c = (z_crc_t)n;
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for (k = 0; k < 8; k++)
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c = c & 1 ? poly ^ (c >> 1) : c >> 1;
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crc_table[0][n] = c;
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@@ -138,11 +120,11 @@ local void make_crc_table()
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and then the byte reversal of those as well as the first table */
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for (n = 0; n < 256; n++) {
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c = crc_table[0][n];
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crc_table[4][n] = REV(c);
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crc_table[4][n] = ZSWAP32(c);
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for (k = 1; k < 4; k++) {
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c = crc_table[0][c & 0xff] ^ (c >> 8);
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crc_table[k][n] = c;
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crc_table[k + 4][n] = REV(c);
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crc_table[k + 4][n] = ZSWAP32(c);
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}
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}
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#endif /* BYFOUR */
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@@ -164,7 +146,7 @@ local void make_crc_table()
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if (out == NULL) return;
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fprintf(out, "/* crc32.h -- tables for rapid CRC calculation\n");
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fprintf(out, " * Generated automatically by crc32.c\n */\n\n");
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fprintf(out, "local const unsigned long FAR ");
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fprintf(out, "local const z_crc_t FAR ");
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fprintf(out, "crc_table[TBLS][256] =\n{\n {\n");
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write_table(out, crc_table[0]);
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# ifdef BYFOUR
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@@ -184,12 +166,13 @@ local void make_crc_table()
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#ifdef MAKECRCH
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local void write_table(out, table)
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FILE *out;
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const unsigned long FAR *table;
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const z_crc_t FAR *table;
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{
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int n;
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for (n = 0; n < 256; n++)
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fprintf(out, "%s0x%08lxUL%s", n % 5 ? "" : " ", table[n],
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fprintf(out, "%s0x%08lxUL%s", n % 5 ? "" : " ",
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(unsigned long)(table[n]),
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n == 255 ? "\n" : (n % 5 == 4 ? ",\n" : ", "));
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}
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#endif /* MAKECRCH */
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@@ -204,13 +187,13 @@ local void write_table(out, table)
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/* =========================================================================
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* This function can be used by asm versions of crc32()
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*/
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const unsigned long FAR * ZEXPORT get_crc_table()
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const z_crc_t FAR * ZEXPORT get_crc_table()
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{
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#ifdef DYNAMIC_CRC_TABLE
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if (crc_table_empty)
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make_crc_table();
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#endif /* DYNAMIC_CRC_TABLE */
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return (const unsigned long FAR *)crc_table;
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return (const z_crc_t FAR *)crc_table;
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}
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/* ========================================================================= */
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@@ -232,7 +215,7 @@ unsigned long ZEXPORT crc32(crc, buf, len)
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#ifdef BYFOUR
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if (sizeof(void *) == sizeof(ptrdiff_t)) {
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u4 endian;
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z_crc_t endian;
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endian = 1;
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if (*((unsigned char *)(&endian)))
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@@ -266,17 +249,17 @@ local unsigned long crc32_little(crc, buf, len)
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const unsigned char FAR *buf;
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unsigned len;
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{
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register u4 c;
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register const u4 FAR *buf4;
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register z_crc_t c;
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register const z_crc_t FAR *buf4;
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c = (u4)crc;
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c = (z_crc_t)crc;
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c = ~c;
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while (len && ((ptrdiff_t)buf & 3)) {
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c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
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len--;
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}
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buf4 = (const u4 FAR *)(const void FAR *)buf;
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buf4 = (const z_crc_t FAR *)(const void FAR *)buf;
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while (len >= 32) {
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DOLIT32;
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len -= 32;
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@@ -306,17 +289,17 @@ local unsigned long crc32_big(crc, buf, len)
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const unsigned char FAR *buf;
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unsigned len;
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{
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register u4 c;
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register const u4 FAR *buf4;
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register z_crc_t c;
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register const z_crc_t FAR *buf4;
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c = REV((u4)crc);
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c = ZSWAP32((z_crc_t)crc);
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c = ~c;
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while (len && ((ptrdiff_t)buf & 3)) {
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c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
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len--;
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}
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buf4 = (const u4 FAR *)(const void FAR *)buf;
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buf4 = (const z_crc_t FAR *)(const void FAR *)buf;
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buf4--;
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while (len >= 32) {
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DOBIG32;
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@@ -333,7 +316,7 @@ local unsigned long crc32_big(crc, buf, len)
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c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
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} while (--len);
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c = ~c;
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return (unsigned long)(REV(c));
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return (unsigned long)(ZSWAP32(c));
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}
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#endif /* BYFOUR */
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