Code-style consistency improvement:
Apply clang-format-all.sh using the _clang-format file through all the cpp/.h files. make sure not to apply it to certain serialization structures, since some parser expects the * as part of the name, instead of type. This commit contains no other changes aside from adding and applying clang-format-all.sh
This commit is contained in:
erwincoumans
@@ -22,44 +22,43 @@
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*/
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#ifdef MAKECRCH
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# include <stdio.h>
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# ifndef DYNAMIC_CRC_TABLE
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# define DYNAMIC_CRC_TABLE
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# endif /* !DYNAMIC_CRC_TABLE */
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#include <stdio.h>
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#ifndef DYNAMIC_CRC_TABLE
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#define DYNAMIC_CRC_TABLE
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#endif /* !DYNAMIC_CRC_TABLE */
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#endif /* MAKECRCH */
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#include "zutil.h" /* for STDC and FAR definitions */
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#include "zutil.h" /* for STDC and FAR definitions */
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#define local static
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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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#define BYFOUR
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#endif
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#ifdef BYFOUR
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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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const unsigned char FAR *, unsigned));
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# define TBLS 8
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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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const unsigned char FAR *, unsigned));
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#define TBLS 8
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#else
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# define TBLS 1
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#define TBLS 1
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#endif /* BYFOUR */
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/* Local functions for crc concatenation */
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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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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_ 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 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 z_crc_t 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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@@ -89,91 +88,97 @@ 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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z_crc_t c;
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int n, k;
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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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z_crc_t c;
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int n, k;
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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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/* See if another task is already doing this (not thread-safe, but better
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/* See if another task is already doing this (not thread-safe, but better
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than nothing -- significantly reduces duration of vulnerability in
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case the advice about DYNAMIC_CRC_TABLE is ignored) */
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if (first) {
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first = 0;
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if (first)
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{
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first = 0;
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/* make exclusive-or pattern from polynomial (0xedb88320UL) */
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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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/* make exclusive-or pattern from polynomial (0xedb88320UL) */
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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 = (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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}
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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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{
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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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}
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#ifdef BYFOUR
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/* generate crc for each value followed by one, two, and three zeros,
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/* generate crc for each value followed by one, two, and three zeros,
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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] = 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] = ZSWAP32(c);
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}
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}
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for (n = 0; n < 256; n++)
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{
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c = crc_table[0][n];
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crc_table[4][n] = ZSWAP32(c);
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for (k = 1; k < 4; k++)
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{
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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] = ZSWAP32(c);
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}
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}
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#endif /* BYFOUR */
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crc_table_empty = 0;
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}
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else { /* not first */
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/* wait for the other guy to finish (not efficient, but rare) */
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while (crc_table_empty)
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;
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}
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crc_table_empty = 0;
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}
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else
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{ /* not first */
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/* wait for the other guy to finish (not efficient, but rare) */
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while (crc_table_empty)
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;
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}
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#ifdef MAKECRCH
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/* write out CRC tables to crc32.h */
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{
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FILE *out;
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/* write out CRC tables to crc32.h */
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{
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FILE *out;
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out = fopen("crc32.h", "w");
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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 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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fprintf(out, "#ifdef BYFOUR\n");
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for (k = 1; k < 8; k++) {
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fprintf(out, " },\n {\n");
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write_table(out, crc_table[k]);
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}
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fprintf(out, "#endif\n");
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# endif /* BYFOUR */
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fprintf(out, " }\n};\n");
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fclose(out);
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}
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out = fopen("crc32.h", "w");
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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 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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fprintf(out, "#ifdef BYFOUR\n");
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for (k = 1; k < 8; k++)
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{
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fprintf(out, " },\n {\n");
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write_table(out, crc_table[k]);
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}
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fprintf(out, "#endif\n");
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#endif /* BYFOUR */
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fprintf(out, " }\n};\n");
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fclose(out);
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}
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#endif /* MAKECRCH */
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}
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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 z_crc_t FAR *table;
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FILE *out;
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const z_crc_t FAR *table;
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{
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int n;
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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 ? "" : " ",
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(unsigned long)(table[n]),
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n == 255 ? "\n" : (n % 5 == 4 ? ",\n" : ", "));
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for (n = 0; n < 256; 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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@@ -187,239 +192,274 @@ 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 z_crc_t 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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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 z_crc_t 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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#define DO1 crc = crc_table[0][((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8)
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#define DO8 DO1; DO1; DO1; DO1; DO1; DO1; DO1; DO1
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#define DO8 \
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DO1; \
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DO1; \
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DO1; \
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DO1; \
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DO1; \
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DO1; \
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DO1; \
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DO1
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/* ========================================================================= */
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unsigned long ZEXPORT crc32(crc, buf, len)
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unsigned long crc;
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const unsigned char FAR *buf;
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uInt len;
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unsigned long ZEXPORT crc32(crc, buf, len) unsigned long crc;
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const unsigned char FAR *buf;
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uInt len;
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{
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if (buf == Z_NULL) return 0UL;
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if (buf == Z_NULL) return 0UL;
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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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if (crc_table_empty)
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make_crc_table();
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#endif /* DYNAMIC_CRC_TABLE */
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#ifdef BYFOUR
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if (sizeof(void *) == sizeof(ptrdiff_t)) {
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z_crc_t endian;
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if (sizeof(void *) == sizeof(ptrdiff_t))
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{
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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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return crc32_little(crc, buf, len);
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else
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return crc32_big(crc, buf, len);
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}
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endian = 1;
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if (*((unsigned char *)(&endian)))
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return crc32_little(crc, buf, len);
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else
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return crc32_big(crc, buf, len);
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}
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#endif /* BYFOUR */
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crc = crc ^ 0xffffffffUL;
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while (len >= 8) {
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DO8;
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len -= 8;
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}
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if (len) do {
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DO1;
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} while (--len);
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return crc ^ 0xffffffffUL;
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crc = crc ^ 0xffffffffUL;
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while (len >= 8)
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{
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DO8;
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len -= 8;
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}
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if (len) do
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{
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DO1;
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} while (--len);
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return crc ^ 0xffffffffUL;
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}
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#ifdef BYFOUR
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/* ========================================================================= */
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#define DOLIT4 c ^= *buf4++; \
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c = crc_table[3][c & 0xff] ^ crc_table[2][(c >> 8) & 0xff] ^ \
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crc_table[1][(c >> 16) & 0xff] ^ crc_table[0][c >> 24]
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#define DOLIT32 DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4
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#define DOLIT4 \
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c ^= *buf4++; \
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c = crc_table[3][c & 0xff] ^ crc_table[2][(c >> 8) & 0xff] ^ \
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crc_table[1][(c >> 16) & 0xff] ^ crc_table[0][c >> 24]
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#define DOLIT32 \
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DOLIT4; \
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DOLIT4; \
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DOLIT4; \
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DOLIT4; \
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DOLIT4; \
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DOLIT4; \
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DOLIT4; \
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DOLIT4
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/* ========================================================================= */
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local unsigned long crc32_little(crc, buf, len)
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unsigned long crc;
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const unsigned char FAR *buf;
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unsigned len;
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local unsigned long crc32_little(crc, buf, len) unsigned long crc;
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const unsigned char FAR *buf;
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unsigned len;
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{
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register z_crc_t c;
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register const z_crc_t 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 = (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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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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{
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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 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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}
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while (len >= 4) {
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DOLIT4;
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len -= 4;
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}
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buf = (const unsigned char FAR *)buf4;
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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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{
|
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DOLIT32;
|
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len -= 32;
|
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}
|
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while (len >= 4)
|
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{
|
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DOLIT4;
|
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len -= 4;
|
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}
|
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buf = (const unsigned char FAR *)buf4;
|
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|
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if (len) do {
|
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c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
|
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} while (--len);
|
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c = ~c;
|
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return (unsigned long)c;
|
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if (len) do
|
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{
|
||||
c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
|
||||
} while (--len);
|
||||
c = ~c;
|
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return (unsigned long)c;
|
||||
}
|
||||
|
||||
/* ========================================================================= */
|
||||
#define DOBIG4 c ^= *++buf4; \
|
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c = crc_table[4][c & 0xff] ^ crc_table[5][(c >> 8) & 0xff] ^ \
|
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crc_table[6][(c >> 16) & 0xff] ^ crc_table[7][c >> 24]
|
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#define DOBIG32 DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4
|
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#define DOBIG4 \
|
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c ^= *++buf4; \
|
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c = crc_table[4][c & 0xff] ^ crc_table[5][(c >> 8) & 0xff] ^ \
|
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crc_table[6][(c >> 16) & 0xff] ^ crc_table[7][c >> 24]
|
||||
#define DOBIG32 \
|
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DOBIG4; \
|
||||
DOBIG4; \
|
||||
DOBIG4; \
|
||||
DOBIG4; \
|
||||
DOBIG4; \
|
||||
DOBIG4; \
|
||||
DOBIG4; \
|
||||
DOBIG4
|
||||
|
||||
/* ========================================================================= */
|
||||
local unsigned long crc32_big(crc, buf, len)
|
||||
unsigned long crc;
|
||||
const unsigned char FAR *buf;
|
||||
unsigned len;
|
||||
local unsigned long crc32_big(crc, buf, len) unsigned long crc;
|
||||
const unsigned char FAR *buf;
|
||||
unsigned len;
|
||||
{
|
||||
register z_crc_t c;
|
||||
register const z_crc_t FAR *buf4;
|
||||
register z_crc_t c;
|
||||
register const z_crc_t FAR *buf4;
|
||||
|
||||
c = ZSWAP32((z_crc_t)crc);
|
||||
c = ~c;
|
||||
while (len && ((ptrdiff_t)buf & 3)) {
|
||||
c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
|
||||
len--;
|
||||
}
|
||||
c = ZSWAP32((z_crc_t)crc);
|
||||
c = ~c;
|
||||
while (len && ((ptrdiff_t)buf & 3))
|
||||
{
|
||||
c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
|
||||
len--;
|
||||
}
|
||||
|
||||
buf4 = (const z_crc_t FAR *)(const void FAR *)buf;
|
||||
buf4--;
|
||||
while (len >= 32) {
|
||||
DOBIG32;
|
||||
len -= 32;
|
||||
}
|
||||
while (len >= 4) {
|
||||
DOBIG4;
|
||||
len -= 4;
|
||||
}
|
||||
buf4++;
|
||||
buf = (const unsigned char FAR *)buf4;
|
||||
buf4 = (const z_crc_t FAR *)(const void FAR *)buf;
|
||||
buf4--;
|
||||
while (len >= 32)
|
||||
{
|
||||
DOBIG32;
|
||||
len -= 32;
|
||||
}
|
||||
while (len >= 4)
|
||||
{
|
||||
DOBIG4;
|
||||
len -= 4;
|
||||
}
|
||||
buf4++;
|
||||
buf = (const unsigned char FAR *)buf4;
|
||||
|
||||
if (len) do {
|
||||
c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
|
||||
} while (--len);
|
||||
c = ~c;
|
||||
return (unsigned long)(ZSWAP32(c));
|
||||
if (len) do
|
||||
{
|
||||
c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
|
||||
} while (--len);
|
||||
c = ~c;
|
||||
return (unsigned long)(ZSWAP32(c));
|
||||
}
|
||||
|
||||
#endif /* BYFOUR */
|
||||
|
||||
#define GF2_DIM 32 /* dimension of GF(2) vectors (length of CRC) */
|
||||
#define GF2_DIM 32 /* dimension of GF(2) vectors (length of CRC) */
|
||||
|
||||
/* ========================================================================= */
|
||||
local unsigned long gf2_matrix_times(mat, vec)
|
||||
unsigned long *mat;
|
||||
unsigned long vec;
|
||||
local unsigned long gf2_matrix_times(mat, vec) unsigned long *mat;
|
||||
unsigned long vec;
|
||||
{
|
||||
unsigned long sum;
|
||||
unsigned long sum;
|
||||
|
||||
sum = 0;
|
||||
while (vec) {
|
||||
if (vec & 1)
|
||||
sum ^= *mat;
|
||||
vec >>= 1;
|
||||
mat++;
|
||||
}
|
||||
return sum;
|
||||
sum = 0;
|
||||
while (vec)
|
||||
{
|
||||
if (vec & 1)
|
||||
sum ^= *mat;
|
||||
vec >>= 1;
|
||||
mat++;
|
||||
}
|
||||
return sum;
|
||||
}
|
||||
|
||||
/* ========================================================================= */
|
||||
local void gf2_matrix_square(square, mat)
|
||||
unsigned long *square;
|
||||
unsigned long *mat;
|
||||
local void gf2_matrix_square(square, mat) unsigned long *square;
|
||||
unsigned long *mat;
|
||||
{
|
||||
int n;
|
||||
int n;
|
||||
|
||||
for (n = 0; n < GF2_DIM; n++)
|
||||
square[n] = gf2_matrix_times(mat, mat[n]);
|
||||
for (n = 0; n < GF2_DIM; n++)
|
||||
square[n] = gf2_matrix_times(mat, mat[n]);
|
||||
}
|
||||
|
||||
/* ========================================================================= */
|
||||
local uLong crc32_combine_(crc1, crc2, len2)
|
||||
uLong crc1;
|
||||
uLong crc2;
|
||||
z_off64_t len2;
|
||||
uLong crc1;
|
||||
uLong crc2;
|
||||
z_off64_t len2;
|
||||
{
|
||||
int n;
|
||||
unsigned long row;
|
||||
unsigned long even[GF2_DIM]; /* even-power-of-two zeros operator */
|
||||
unsigned long odd[GF2_DIM]; /* odd-power-of-two zeros operator */
|
||||
int n;
|
||||
unsigned long row;
|
||||
unsigned long even[GF2_DIM]; /* even-power-of-two zeros operator */
|
||||
unsigned long odd[GF2_DIM]; /* odd-power-of-two zeros operator */
|
||||
|
||||
/* degenerate case (also disallow negative lengths) */
|
||||
if (len2 <= 0)
|
||||
return crc1;
|
||||
/* degenerate case (also disallow negative lengths) */
|
||||
if (len2 <= 0)
|
||||
return crc1;
|
||||
|
||||
/* put operator for one zero bit in odd */
|
||||
odd[0] = 0xedb88320UL; /* CRC-32 polynomial */
|
||||
row = 1;
|
||||
for (n = 1; n < GF2_DIM; n++) {
|
||||
odd[n] = row;
|
||||
row <<= 1;
|
||||
}
|
||||
/* put operator for one zero bit in odd */
|
||||
odd[0] = 0xedb88320UL; /* CRC-32 polynomial */
|
||||
row = 1;
|
||||
for (n = 1; n < GF2_DIM; n++)
|
||||
{
|
||||
odd[n] = row;
|
||||
row <<= 1;
|
||||
}
|
||||
|
||||
/* put operator for two zero bits in even */
|
||||
gf2_matrix_square(even, odd);
|
||||
/* put operator for two zero bits in even */
|
||||
gf2_matrix_square(even, odd);
|
||||
|
||||
/* put operator for four zero bits in odd */
|
||||
gf2_matrix_square(odd, even);
|
||||
/* put operator for four zero bits in odd */
|
||||
gf2_matrix_square(odd, even);
|
||||
|
||||
/* apply len2 zeros to crc1 (first square will put the operator for one
|
||||
/* apply len2 zeros to crc1 (first square will put the operator for one
|
||||
zero byte, eight zero bits, in even) */
|
||||
do {
|
||||
/* apply zeros operator for this bit of len2 */
|
||||
gf2_matrix_square(even, odd);
|
||||
if (len2 & 1)
|
||||
crc1 = gf2_matrix_times(even, crc1);
|
||||
len2 >>= 1;
|
||||
do
|
||||
{
|
||||
/* apply zeros operator for this bit of len2 */
|
||||
gf2_matrix_square(even, odd);
|
||||
if (len2 & 1)
|
||||
crc1 = gf2_matrix_times(even, crc1);
|
||||
len2 >>= 1;
|
||||
|
||||
/* if no more bits set, then done */
|
||||
if (len2 == 0)
|
||||
break;
|
||||
/* if no more bits set, then done */
|
||||
if (len2 == 0)
|
||||
break;
|
||||
|
||||
/* another iteration of the loop with odd and even swapped */
|
||||
gf2_matrix_square(odd, even);
|
||||
if (len2 & 1)
|
||||
crc1 = gf2_matrix_times(odd, crc1);
|
||||
len2 >>= 1;
|
||||
/* another iteration of the loop with odd and even swapped */
|
||||
gf2_matrix_square(odd, even);
|
||||
if (len2 & 1)
|
||||
crc1 = gf2_matrix_times(odd, crc1);
|
||||
len2 >>= 1;
|
||||
|
||||
/* if no more bits set, then done */
|
||||
} while (len2 != 0);
|
||||
/* if no more bits set, then done */
|
||||
} while (len2 != 0);
|
||||
|
||||
/* return combined crc */
|
||||
crc1 ^= crc2;
|
||||
return crc1;
|
||||
/* return combined crc */
|
||||
crc1 ^= crc2;
|
||||
return crc1;
|
||||
}
|
||||
|
||||
/* ========================================================================= */
|
||||
uLong ZEXPORT crc32_combine(crc1, crc2, len2)
|
||||
uLong crc1;
|
||||
uLong crc2;
|
||||
z_off_t len2;
|
||||
uLong crc1;
|
||||
uLong crc2;
|
||||
z_off_t len2;
|
||||
{
|
||||
return crc32_combine_(crc1, crc2, len2);
|
||||
return crc32_combine_(crc1, crc2, len2);
|
||||
}
|
||||
|
||||
uLong ZEXPORT crc32_combine64(crc1, crc2, len2)
|
||||
uLong crc1;
|
||||
uLong crc2;
|
||||
z_off64_t len2;
|
||||
uLong crc1;
|
||||
uLong crc2;
|
||||
z_off64_t len2;
|
||||
{
|
||||
return crc32_combine_(crc1, crc2, len2);
|
||||
return crc32_combine_(crc1, crc2, len2);
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user