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From be0c5581e38332b2ffa8a4cf92076cfde02872b4 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Tue, 2 Apr 2019 10:26:30 -0700
Subject: Improve IBM Z patch
Most of this is minor changes to use GNU style and C99 constructs.
* NEWS: Mention IBM Z.
* bootstrap.conf (gnulib_modules): Add stdalign.
* dfltcc.c: Include stdalign.h, stdbool.h.
(union aligned_dfltcc_qaf_param, union aligned_dfltcc_param_v0):
New types, used for C11-style alignment. All uses changed.
(init_param):
* gzip.c (BUFFER_ALIGNED): New macro.
(inbuf, outbuf, window): Use it, so buffers are aligned everywhere.
* gzip.h (INBUFSIZ, OUTBUFSIZE): Use big buffers everywhere,
unless SMALL_MEM.
* zip.c (SLOW, FAST): Now enums since they need not be macros:
---
NEWS | 4 +
bootstrap.conf | 1 +
deflate.c | 8 +-
dfltcc.c | 632 +++++++++++++++++++++++++++++----------------------------
gzip.c | 27 ++-
gzip.h | 16 +-
lib/.gitignore | 1 +
m4/.gitignore | 1 +
unzip.c | 2 +-
util.c | 30 ++-
zip.c | 24 +--
11 files changed, 376 insertions(+), 370 deletions(-)
diff --git a/deflate.c b/deflate.c
index 869b902..eb697af 100644
--- a/deflate.c
+++ b/deflate.c
@@ -718,7 +718,8 @@ local off_t deflate_fast()
* evaluation for matches: a match is finally adopted only if there is
* no better match at the next window position.
*/
-off_t deflate(int pack_level)
+off_t
+deflate (int pack_level)
{
IPos hash_head; /* head of hash chain */
IPos prev_match; /* previous match */
@@ -726,8 +727,9 @@ off_t deflate(int pack_level)
int match_available = 0; /* set if previous match exists */
register unsigned match_length = MIN_MATCH-1; /* length of best match */
- lm_init(pack_level);
- if (pack_level <= 3) return deflate_fast(); /* optimized for speed */
+ lm_init (pack_level);
+ if (pack_level <= 3)
+ return deflate_fast();
/* Process the input block. */
while (lookahead != 0) {
diff --git a/dfltcc.c b/dfltcc.c
index 9010475..ba62968 100644
--- a/dfltcc.c
+++ b/dfltcc.c
@@ -17,16 +17,20 @@
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#include <config.h>
+
+#include <stdalign.h>
+#include <stdbool.h>
#include <stdlib.h>
+
#ifdef DFLTCC_USDT
-#include <sys/sdt.h>
+# include <sys/sdt.h>
#endif
#include "tailor.h"
#include "gzip.h"
#ifdef DYN_ALLOC
- error: DYN_ALLOC is not supported by DFLTCC
+# error "DYN_ALLOC is not supported by DFLTCC"
#endif
/* ===========================================================================
@@ -35,11 +39,11 @@
typedef enum
{
- DFLTCC_CC_OK = 0,
- DFLTCC_CC_OP1_TOO_SHORT = 1,
- DFLTCC_CC_OP2_TOO_SHORT = 2,
- DFLTCC_CC_OP2_CORRUPT = 2,
- DFLTCC_CC_AGAIN = 3,
+ DFLTCC_CC_OK = 0,
+ DFLTCC_CC_OP1_TOO_SHORT = 1,
+ DFLTCC_CC_OP2_TOO_SHORT = 2,
+ DFLTCC_CC_OP2_CORRUPT = 2,
+ DFLTCC_CC_AGAIN = 3,
} dfltcc_cc;
#define DFLTCC_QAF 0
@@ -47,383 +51,391 @@ typedef enum
#define DFLTCC_CMPR 2
#define DFLTCC_XPND 4
#define HBT_CIRCULAR (1 << 7)
-//#define HB_BITS 15
-//#define HB_SIZE (1 << HB_BITS)
+/* #define HB_BITS 15 */
+/* #define HB_SIZE (1 << HB_BITS) */
#define DFLTCC_FACILITY 151
#define DFLTCC_FMT0 0
#define CVT_CRC32 0
#define HTT_FIXED 0
#define HTT_DYNAMIC 1
+#ifndef DFLTCC_BLOCK_SIZE
+# define DFLTCC_BLOCK_SIZE 1048576
+#endif
+#ifndef DFLTCC_FIRST_FHT_BLOCK_SIZE
+# define DFLTCC_FIRST_FHT_BLOCK_SIZE 4096
+#endif
+#ifndef DFLTCC_LEVEL_MASK
+# define DFLTCC_LEVEL_MASK 0x2
+#endif
+#ifndef DFLTCC_RIBM
+# define DFLTCC_RIBM 0
+#endif
+
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+
struct dfltcc_qaf_param
{
- char fns[16];
- char reserved1[8];
- char fmts[2];
- char reserved2[6];
+ char fns[16];
+ char reserved1[8];
+ char fmts[2];
+ char reserved2[6];
+};
+
+union aligned_dfltcc_qaf_param
+{
+ struct dfltcc_qaf_param af;
+ char alignas (8) aligned;
};
struct dfltcc_param_v0
{
- unsigned short pbvn; /* Parameter-Block-Version Number */
- unsigned char mvn; /* Model-Version Number */
- unsigned char ribm; /* Reserved for IBM use */
- unsigned reserved32 : 31;
- unsigned cf : 1; /* Continuation Flag */
- unsigned char reserved64[8];
- unsigned nt : 1; /* New Task */
- unsigned reserved129 : 1;
- unsigned cvt : 1; /* Check Value Type */
- unsigned reserved131 : 1;
- unsigned htt : 1; /* Huffman-Table Type */
- unsigned bcf : 1; /* Block-Continuation Flag */
- unsigned bcc : 1; /* Block Closing Control */
- unsigned bhf : 1; /* Block Header Final */
- unsigned reserved136 : 1;
- unsigned reserved137 : 1;
- unsigned dhtgc : 1; /* DHT Generation Control */
- unsigned reserved139 : 5;
- unsigned reserved144 : 5;
- unsigned sbb : 3; /* Sub-Byte Boundary */
- unsigned char oesc; /* Operation-Ending-Supplemental Code */
- unsigned reserved160 : 12;
- unsigned ifs : 4; /* Incomplete-Function Status */
- unsigned short ifl; /* Incomplete-Function Length */
- unsigned char reserved192[8];
- unsigned char reserved256[8];
- unsigned char reserved320[4];
- unsigned short hl; /* History Length */
- unsigned reserved368 : 1;
- unsigned short ho : 15; /* History Offset */
- unsigned int cv; /* Check Value */
- unsigned eobs : 15; /* End-of-block Symbol */
- unsigned reserved431 : 1;
- unsigned char eobl : 4; /* End-of-block Length */
- unsigned reserved436 : 12;
- unsigned reserved448 : 4;
- unsigned short cdhtl : 12; /* Compressed-Dynamic-Huffman Table
- Length */
- unsigned char reserved464[6];
- unsigned char cdht[288];
- unsigned char reserved[32];
- unsigned char csb[1152];
+ unsigned short pbvn; /* Parameter-Block-Version Number */
+ unsigned char mvn; /* Model-Version Number */
+ unsigned char ribm; /* Reserved for IBM use */
+ unsigned reserved32 : 31;
+ unsigned cf : 1; /* Continuation Flag */
+ unsigned char reserved64[8];
+ unsigned nt : 1; /* New Task */
+ unsigned reserved129 : 1;
+ unsigned cvt : 1; /* Check Value Type */
+ unsigned reserved131 : 1;
+ unsigned htt : 1; /* Huffman-Table Type */
+ unsigned bcf : 1; /* Block-Continuation Flag */
+ unsigned bcc : 1; /* Block Closing Control */
+ unsigned bhf : 1; /* Block Header Final */
+ unsigned reserved136 : 1;
+ unsigned reserved137 : 1;
+ unsigned dhtgc : 1; /* DHT Generation Control */
+ unsigned reserved139 : 5;
+ unsigned reserved144 : 5;
+ unsigned sbb : 3; /* Sub-Byte Boundary */
+ unsigned char oesc; /* Operation-Ending-Supplemental Code */
+ unsigned reserved160 : 12;
+ unsigned ifs : 4; /* Incomplete-Function Status */
+ unsigned short ifl; /* Incomplete-Function Length */
+ unsigned char reserved192[8];
+ unsigned char reserved256[8];
+ unsigned char reserved320[4];
+ unsigned short hl; /* History Length */
+ unsigned reserved368 : 1;
+ unsigned short ho : 15; /* History Offset */
+ unsigned int cv; /* Check Value */
+ unsigned eobs : 15; /* End-of-block Symbol */
+ unsigned reserved431 : 1;
+ unsigned char eobl : 4; /* End-of-block Length */
+ unsigned reserved436 : 12;
+ unsigned reserved448 : 4;
+ unsigned short cdhtl : 12; /* Compressed-Dynamic-Huffman Table
+ Length */
+ unsigned char reserved464[6];
+ unsigned char cdht[288];
+ unsigned char reserved[32];
+ unsigned char csb[1152];
};
-static int is_bit_set(const char *bits, int n)
+union aligned_dfltcc_param_v0
{
- return bits[n / 8] & (1 << (7 - (n % 8)));
+ struct dfltcc_param_v0 param;
+ char alignas (8) aligned;
+};
+
+static int
+is_bit_set (const char *bits, int n)
+{
+ return bits[n / 8] & (1 << (7 - (n % 8)));
}
-static int is_dfltcc_enabled(void)
+static int
+is_dfltcc_enabled (void)
{
- const char *env;
- char facilities[((DFLTCC_FACILITY / 64) + 1) * 8];
- register int r0 __asm__("r0");
+ char facilities[(DFLTCC_FACILITY / 64 + 1) * 8];
- env = getenv("DFLTCC");
- if (env && !strcmp(env, "0")) {
- return 0;
- }
+ char const *env = getenv ("DFLTCC");
+ if (env && !strcmp (env, "0"))
+ return 0;
- r0 = sizeof(facilities) / 8;
- __asm__("stfle %[facilities]\n"
- : [facilities] "=Q"(facilities) : [r0] "r"(r0) : "cc", "memory");
- return is_bit_set((const char *) facilities, DFLTCC_FACILITY);
+ register int r0 __asm__ ("r0") = sizeof facilities / 8;
+ __asm__ ("stfle %[facilities]\n"
+ : [facilities] "=Q"(facilities) : [r0] "r"(r0) : "cc", "memory");
+ return is_bit_set (facilities, DFLTCC_FACILITY);
}
-static dfltcc_cc dfltcc(int fn, void *param,
- uch **op1, size_t *len1,
- const uch **op2, size_t *len2,
- void *hist)
+static dfltcc_cc
+dfltcc (int fn, void *param,
+ uch **op1, size_t *len1,
+ uch const **op2, size_t *len2,
+ void *hist)
{
- uch *t2 = op1 ? *op1 : NULL;
- size_t t3 = len1 ? *len1 : 0;
- const uch *t4 = op2 ? *op2 : NULL;
- size_t t5 = len2 ? *len2 : 0;
- register int r0 __asm__("r0") = fn;
- register void *r1 __asm__("r1") = param;
- register uch *r2 __asm__("r2") = t2;
- register size_t r3 __asm__("r3") = t3;
- register const uch *r4 __asm__("r4") = t4;
- register size_t r5 __asm__("r5") = t5;
- int cc;
-
- __asm__ volatile(
+ uch *t2 = op1 ? *op1 : NULL;
+ size_t t3 = len1 ? *len1 : 0;
+ const uch *t4 = op2 ? *op2 : NULL;
+ size_t t5 = len2 ? *len2 : 0;
+ register int r0 __asm__ ("r0") = fn;
+ register void *r1 __asm__ ("r1") = param;
+ register uch *r2 __asm__ ("r2") = t2;
+ register size_t r3 __asm__ ("r3") = t3;
+ register const uch *r4 __asm__ ("r4") = t4;
+ register size_t r5 __asm__ ("r5") = t5;
+ int cc;
+
+ __asm__ volatile (
#ifdef DFLTCC_USDT
- STAP_PROBE_ASM(zlib, dfltcc_entry,
- STAP_PROBE_ASM_TEMPLATE(5))
+ STAP_PROBE_ASM (zlib, dfltcc_entry,
+ STAP_PROBE_ASM_TEMPLATE (5))
#endif
- ".insn rrf,0xb9390000,%[r2],%[r4],%[hist],0\n"
+ ".insn rrf,0xb9390000,%[r2],%[r4],%[hist],0\n"
#ifdef DFLTCC_USDT
- STAP_PROBE_ASM(zlib, dfltcc_exit,
- STAP_PROBE_ASM_TEMPLATE(5))
+ STAP_PROBE_ASM (zlib, dfltcc_exit,
+ STAP_PROBE_ASM_TEMPLATE (5))
#endif
- "ipm %[cc]\n"
- : [r2] "+r" (r2)
- , [r3] "+r" (r3)
- , [r4] "+r" (r4)
- , [r5] "+r" (r5)
- , [cc] "=r" (cc)
- : [r0] "r" (r0)
- , [r1] "r" (r1)
- , [hist] "r" (hist)
+ "ipm %[cc]\n"
+ : [r2] "+r" (r2)
+ , [r3] "+r" (r3)
+ , [r4] "+r" (r4)
+ , [r5] "+r" (r5)
+ , [cc] "=r" (cc)
+ : [r0] "r" (r0)
+ , [r1] "r" (r1)
+ , [hist] "r" (hist)
#ifdef DFLTCC_USDT
- , STAP_PROBE_ASM_OPERANDS(5, r2, r3, r4, r5, hist)
+ , STAP_PROBE_ASM_OPERANDS (5, r2, r3, r4, r5, hist)
#endif
- : "cc", "memory");
- t2 = r2; t3 = r3; t4 = r4; t5 = r5;
-
- if (op1)
- *op1 = t2;
- if (len1)
- *len1 = t3;
- if (op2)
- *op2 = t4;
- if (len2)
- *len2 = t5;
- return (cc >> 28) & 3;
+ : "cc", "memory");
+ t2 = r2; t3 = r3; t4 = r4; t5 = r5;
+
+ if (op1)
+ *op1 = t2;
+ if (len1)
+ *len1 = t3;
+ if (op2)
+ *op2 = t4;
+ if (len2)
+ *len2 = t5;
+ return (cc >> 28) & 3;
}
-static void dfltcc_qaf(struct dfltcc_qaf_param *param)
+static void
+dfltcc_qaf (struct dfltcc_qaf_param *param)
{
- dfltcc(DFLTCC_QAF, param, NULL, NULL, NULL, NULL, NULL);
+ dfltcc (DFLTCC_QAF, param, NULL, NULL, NULL, NULL, NULL);
}
-static void dfltcc_gdht(struct dfltcc_param_v0 *param)
+static void
+dfltcc_gdht (struct dfltcc_param_v0 *param)
{
- const uch *next_in = inbuf + inptr;
- size_t avail_in = insize - inptr;
+ const uch *next_in = inbuf + inptr;
+ size_t avail_in = insize - inptr;
- dfltcc(DFLTCC_GDHT, param, NULL, NULL, &next_in, &avail_in, NULL);
+ dfltcc (DFLTCC_GDHT, param, NULL, NULL, &next_in, &avail_in, NULL);
}
static off_t total_in;
-static dfltcc_cc dfltcc_cmpr_xpnd(struct dfltcc_param_v0 *param, int fn)
+static dfltcc_cc
+dfltcc_cmpr_xpnd (struct dfltcc_param_v0 *param, int fn)
{
- uch *next_out = outbuf + outcnt;
- size_t avail_out = OUTBUFSIZ - outcnt;
- const uch *next_in = inbuf + inptr;
- size_t avail_in = insize - inptr;
- off_t consumed_in;
- dfltcc_cc cc;
-
- cc = dfltcc(fn | HBT_CIRCULAR, param,
- &next_out, &avail_out,
- &next_in, &avail_in,
- window);
- consumed_in = next_in - (inbuf + inptr);
- inptr += consumed_in;
- total_in += consumed_in;
- outcnt += ((OUTBUFSIZ - outcnt) - avail_out);
- return cc;
+ uch *next_out = outbuf + outcnt;
+ size_t avail_out = OUTBUFSIZ - outcnt;
+ const uch *next_in = inbuf + inptr;
+ size_t avail_in = insize - inptr;
+ dfltcc_cc cc = dfltcc (fn | HBT_CIRCULAR, param,
+ &next_out, &avail_out,
+ &next_in, &avail_in,
+ window);
+ off_t consumed_in = next_in - (inbuf + inptr);
+ inptr += consumed_in;
+ total_in += consumed_in;
+ outcnt += ((OUTBUFSIZ - outcnt) - avail_out);
+ return cc;
}
-__attribute__((aligned(8)))
-static struct context
+static struct dfltcc_param_v0 *
+init_param (union aligned_dfltcc_param_v0 *ctx)
{
- union
- {
- struct dfltcc_qaf_param af;
- struct dfltcc_param_v0 param;
- };
-} ctx;
-
-static struct dfltcc_param_v0 *init_param(struct dfltcc_param_v0 *param)
-{
- const char *s;
-
- memset(param, 0, sizeof(*param));
-#ifndef DFLTCC_RIBM
-#define DFLTCC_RIBM 0
-#endif
- s = getenv("DFLTCC_RIBM");
- param->ribm = (s && *s) ? strtoul(s, NULL, 0) : DFLTCC_RIBM;
- param->nt = 1;
- param->cvt = CVT_CRC32;
- param->cv = __builtin_bswap32(getcrc());
- return param;
+ char const *s = getenv ("DFLTCC_RIBM");
+ struct dfltcc_param_v0 *param = &ctx->param;
+ memset (param, 0, sizeof *param);
+ param->ribm = s && *s ? strtoul (s, NULL, 0) : DFLTCC_RIBM;
+ param->nt = 1;
+ param->cvt = CVT_CRC32;
+ param->cv = __builtin_bswap32 (getcrc ());
+ return param;
}
-static void bi_close_block(struct dfltcc_param_v0 *param)
+static void
+bi_close_block (struct dfltcc_param_v0 *param)
{
- bi_valid = param->sbb;
- bi_buf = bi_valid == 0 ? 0 : outbuf[outcnt] & ((1 << bi_valid) - 1);
- send_bits(
- bi_reverse(param->eobs >> (15 - param->eobl), param->eobl),
- param->eobl);
- param->bcf = 0;
+ bi_valid = param->sbb;
+ bi_buf = bi_valid == 0 ? 0 : outbuf[outcnt] & ((1 << bi_valid) - 1);
+ send_bits (bi_reverse (param->eobs >> (15 - param->eobl), param->eobl),
+ param->eobl);
+ param->bcf = 0;
}
-static void close_block(struct dfltcc_param_v0 *param)
+static void
+close_block (struct dfltcc_param_v0 *param)
{
- bi_close_block(param);
- bi_windup();
- param->sbb = (param->sbb + param->eobl) % 8;
- if (param->sbb != 0) {
- Assert(outcnt > 0, "outbuf must have enough space for EOBS");
- outcnt--;
+ bi_close_block (param);
+ bi_windup ();
+ param->sbb = (param->sbb + param->eobl) % 8;
+ if (param->sbb != 0)
+ {
+ Assert (outcnt > 0, "outbuf must have enough space for EOBS");
+ outcnt--;
}
}
-static void close_stream(struct dfltcc_param_v0 *param)
+static void
+close_stream (struct dfltcc_param_v0 *param)
{
- if (param->bcf) {
- bi_close_block(param);
- }
- send_bits(1, 3); /* BFINAL=1, BTYPE=00 */
- bi_windup();
- put_short(0x0000);
- put_short(0xFFFF);
+ if (param->bcf)
+ bi_close_block (param);
+ send_bits (1, 3); /* BFINAL=1, BTYPE=00 */
+ bi_windup ();
+ put_short (0x0000);
+ put_short (0xFFFF);
}
-#define MAX(a, b) ((a) > (b) ? (a) : (b))
+/* Compress ifd into ofd in hardware or fall back to software. */
-/* ===========================================================================
- * Compress ifd into ofd in hardware or fall back to software.
- */
-int dfltcc_deflate(int pack_level)
+int
+dfltcc_deflate (int pack_level)
{
- const char *s;
- unsigned long level_mask;
- unsigned long block_size;
- off_t block_threshold;
- struct dfltcc_param_v0 *param;
- int extra;
-
- /* Check whether we can use hardware compression */
- if (!is_dfltcc_enabled() || getenv("SOURCE_DATE_EPOCH")) {
- return deflate(pack_level);
- }
-#ifndef DFLTCC_LEVEL_MASK
-#define DFLTCC_LEVEL_MASK 0x2
-#endif
- s = getenv("DFLTCC_LEVEL_MASK");
- level_mask = (s && *s) ? strtoul(s, NULL, 0) : DFLTCC_LEVEL_MASK;
- if ((level_mask & (1 << pack_level)) == 0) {
- return deflate(pack_level);
- }
- dfltcc_qaf(&ctx.af);
- if (!is_bit_set(ctx.af.fns, DFLTCC_CMPR) ||
- !is_bit_set(ctx.af.fns, DFLTCC_GDHT) ||
- !is_bit_set(ctx.af.fmts, DFLTCC_FMT0)) {
- return deflate(pack_level);
- }
-
- /* Initialize tuning parameters */
-#ifndef DFLTCC_BLOCK_SIZE
-#define DFLTCC_BLOCK_SIZE 1048576
-#endif
- s = getenv("DFLTCC_BLOCK_SIZE");
- block_size = (s && *s) ? strtoul(s, NULL, 0) : DFLTCC_BLOCK_SIZE;
- (void)block_size;
-#ifndef DFLTCC_FIRST_FHT_BLOCK_SIZE
-#define DFLTCC_FIRST_FHT_BLOCK_SIZE 4096
-#endif
- s = getenv("DFLTCC_FIRST_FHT_BLOCK_SIZE");
- block_threshold = (s && *s) ? strtoul(s, NULL, 0) :
- DFLTCC_FIRST_FHT_BLOCK_SIZE;
-
- /* Compress ifd into ofd in a loop */
- param = init_param(&ctx.param);
- while (1) {
- /* Flush the output data */
- if (outcnt > OUTBUFSIZ - 8) {
- flush_outbuf();
- }
-
- /* Close the block */
- if (param->bcf && total_in == block_threshold && !param->cf) {
- close_block(param);
- block_threshold += block_size;
+ /* Check whether we can use hardware compression. */
+ if (!is_dfltcc_enabled () || getenv ("SOURCE_DATE_EPOCH"))
+ return deflate (pack_level);
+ char const *s = getenv ("DFLTCC_LEVEL_MASK");
+ unsigned long level_mask
+ = s && *s ? strtoul (s, NULL, 0) : DFLTCC_LEVEL_MASK;
+ if ((level_mask & (1 << pack_level)) == 0)
+ return deflate (pack_level);
+ union aligned_dfltcc_qaf_param ctx;
+ dfltcc_qaf (&ctx.af);
+ if (!is_bit_set (ctx.af.fns, DFLTCC_CMPR)
+ || !is_bit_set (ctx.af.fns, DFLTCC_GDHT)
+ || !is_bit_set (ctx.af.fmts, DFLTCC_FMT0))
+ return deflate (pack_level);
+
+ /* Initialize tuning parameters. */
+ s = getenv ("DFLTCC_BLOCK_SIZE");
+ unsigned long block_size
+ = s && *s ? strtoul (s, NULL, 0) : DFLTCC_BLOCK_SIZE;
+
+ s = getenv ("DFLTCC_FIRST_FHT_BLOCK_SIZE");
+ off_t block_threshold
+ = s && *s ? strtoul (s, NULL, 0) : DFLTCC_FIRST_FHT_BLOCK_SIZE;
+
+ union aligned_dfltcc_param_v0 ctx_v0;
+ struct dfltcc_param_v0 *param = init_param (&ctx_v0);
+
+ /* Compress ifd into ofd in a loop. */
+ while (true)
+ {
+ /* Flush the output data. */
+ if (outcnt > OUTBUFSIZ - 8)
+ flush_outbuf ();
+
+ /* Close the block. */
+ if (param->bcf && total_in == block_threshold && !param->cf)
+ {
+ close_block (param);
+ block_threshold += block_size;
}
- /* Read the input data */
- if (inptr == insize) {
- if (fill_inbuf(1) == EOF && !param->cf) {
- break;
- }
- inptr = 0;
+ /* Read the input data. */
+ if (inptr == insize)
+ {
+ if (fill_inbuf (1) == EOF && !param->cf)
+ break;
+ inptr = 0;
}
- /* Temporarily mask some input data */
- extra = MAX(0, total_in + (insize - inptr) - block_threshold);
- insize -= extra;
-
- /* Start a new block */
- if (!param->bcf) {
- if (total_in == 0 && block_threshold > 0) {
- param->htt = HTT_FIXED;
- } else {
- param->htt = HTT_DYNAMIC;
- dfltcc_gdht(param);
- }
+ /* Temporarily mask some input data. */
+ int extra = MAX (0, total_in + (insize - inptr) - block_threshold);
+ insize -= extra;
+
+ /* Start a new block. */
+ if (!param->bcf)
+ {
+ if (total_in == 0 && block_threshold > 0)
+ param->htt = HTT_FIXED;
+ else {
+ param->htt = HTT_DYNAMIC;
+ dfltcc_gdht (param);
+ }
}
- /* Compress inbuf into outbuf */
- dfltcc_cmpr_xpnd(param, DFLTCC_CMPR);
+ /* Compress inbuf into outbuf. */
+ dfltcc_cmpr_xpnd (param, DFLTCC_CMPR);
- /* Unmask the input data */
- insize += extra;
+ /* Unmask the input data. */
+ insize += extra;
- /* Continue the block */
- param->bcf = 1;
+ /* Continue the block */
+ param->bcf = 1;
}
- close_stream(param);
- setcrc(__builtin_bswap32(param->cv));
- return 0;
+
+ close_stream (param);
+ setcrc (__builtin_bswap32 (param->cv));
+ return 0;
}
-/* ===========================================================================
- * Decompress ifd into ofd in hardware or fall back to software.
- */
-int dfltcc_inflate(void)
+/* Decompress ifd into ofd in hardware or fall back to software. */
+int
+dfltcc_inflate (void)
{
- struct dfltcc_param_v0 *param;
- dfltcc_cc cc;
-
- /* Check whether we can use hardware decompression */
- if (!is_dfltcc_enabled()) {
- return inflate();
- }
- dfltcc_qaf(&ctx.af);
- if (!is_bit_set(ctx.af.fns, DFLTCC_XPND)) {
- return inflate();
- }
-
- /* Decompress ifd into ofd in a loop */
- param = init_param(&ctx.param);
- while (1) {
- /* Perform I/O */
- if (outcnt == OUTBUFSIZ) {
- flush_outbuf();
- }
- if (inptr == insize) {
- if (fill_inbuf(1) == EOF) {
- /* Premature EOF */
- return 2;
+ /* Check whether we can use hardware decompression. */
+ if (!is_dfltcc_enabled ())
+ return inflate ();
+ union aligned_dfltcc_qaf_param ctx;
+ dfltcc_qaf (&ctx.af);
+ if (!is_bit_set (ctx.af.fns, DFLTCC_XPND))
+ return inflate ();
+
+ union aligned_dfltcc_param_v0 ctx_v0;
+ struct dfltcc_param_v0 *param = init_param (&ctx_v0);
+
+ /* Decompress ifd into ofd in a loop. */
+ while (true)
+ {
+ /* Perform I/O. */
+ if (outcnt == OUTBUFSIZ)
+ flush_outbuf ();
+ if (inptr == insize)
+ {
+ if (fill_inbuf (1) == EOF)
+ {
+ /* Premature EOF. */
+ return 2;
}
- inptr = 0;
+ inptr = 0;
}
- /* Decompress inbuf into outbuf */
- cc = dfltcc_cmpr_xpnd(param, DFLTCC_XPND);
- if (cc == DFLTCC_CC_OK) {
- /* The entire deflate stream has been successfully decompressed */
+
+ /* Decompress inbuf into outbuf. */
+ dfltcc_cc cc = dfltcc_cmpr_xpnd (param, DFLTCC_XPND);
+ if (cc == DFLTCC_CC_OK)
+ {
+ /* The entire deflate stream has been successfully decompressed. */
break;
- }
- if (cc == DFLTCC_CC_OP2_CORRUPT && param->oesc != 0) {
- /* The deflate stream is corrupted */
+ }
+ if (cc == DFLTCC_CC_OP2_CORRUPT && param->oesc != 0)
+ {
+ /* The deflate stream is corrupted. */
return 2;
- }
- /* There must be more data to decompress */
+ }
+ /* There must be more data to decompress. */
}
- if (param->sbb != 0) {
- /* The deflate stream has ended in the middle of a byte - go to the next
- * byte boundary, so that unzip() can read CRC and length.
- */
- inptr++;
+
+ if (param->sbb != 0)
+ {
+ /* The deflate stream has ended in the middle of a byte. Go to
+ the next byte boundary, so that unzip can read CRC and length. */
+ inptr++;
}
- setcrc(__builtin_bswap32(param->cv)); /* set CRC value for unzip() */
- flush_outbuf(); /* update bytes_out for unzip() */
- return 0;
+
+ /* Set CRC value and update bytes_out for unzip. */
+ setcrc (__builtin_bswap32 (param->cv));
+ flush_outbuf ();
+ return 0;
}
diff --git a/gzip.c b/gzip.c
index 4fffc4f..f29edaf 100644
--- a/gzip.c
+++ b/gzip.c
@@ -58,6 +58,7 @@ static char const *const license_msg[] = {
#include <ctype.h>
#include <sys/types.h>
#include <signal.h>
+#include <stdalign.h>
#include <stdbool.h>
#include <stddef.h>
#include <sys/stat.h>
@@ -128,22 +129,20 @@ static char const *const license_msg[] = {
/* global buffers */
-#ifdef IBM_Z_DFLTCC
-/* DEFLATE COMPRESSION CALL works faster with page-aligned input buffers */
-__attribute__((aligned(4096)))
-#endif
-DECLARE(uch, inbuf, INBUFSIZ +INBUF_EXTRA);
-#ifdef IBM_Z_DFLTCC
-/* DEFLATE COMPRESSION CALL works faster with page-aligned output buffers */
-__attribute__((aligned(4096)))
+/* With IBM_Z_DFLTCC, DEFLATE COMPRESSION works faster with
+ page-aligned input and output buffers, and requires page-aligned
+ windows; the alignment requirement is 4096. On other platforms
+ alignment doesn't hurt, and alignment up to 8192 is portable so
+ let's do that. */
+#ifdef __alignas_is_defined
+# define BUFFER_ALIGNED alignas (8192)
+#else
+# define BUFFER_ALIGNED /**/
#endif
-DECLARE(uch, outbuf, OUTBUFSIZ+OUTBUF_EXTRA);
+DECLARE(uch BUFFER_ALIGNED, inbuf, INBUFSIZ +INBUF_EXTRA);
+DECLARE(uch BUFFER_ALIGNED, outbuf, OUTBUFSIZ+OUTBUF_EXTRA);
DECLARE(ush, d_buf, DIST_BUFSIZE);
-#ifdef IBM_Z_DFLTCC
-/* DEFLATE COMPRESSION CALL works only with page-aligned windows */
-__attribute__((aligned(4096)))
-#endif
-DECLARE(uch, window, 2L*WSIZE);
+DECLARE(uch BUFFER_ALIGNED, window, 2L*WSIZE);
#ifndef MAXSEG_64K
DECLARE(ush, tab_prefix, 1L<<BITS);
#else
diff --git a/gzip.h b/gzip.h
index 0c59cc2..9a2babd 100644
--- a/gzip.h
+++ b/gzip.h
@@ -74,25 +74,19 @@ extern int method; /* compression method */
*/
#ifndef INBUFSIZ
-# ifdef IBM_Z_DFLTCC
-/* DEFLATE COMPRESSION CALL works faster with larger input buffers */
-# define INBUFSIZ 0x40000
-# elif defined SMALL_MEM
+# ifdef SMALL_MEM
# define INBUFSIZ 0x2000 /* input buffer size */
# else
-# define INBUFSIZ 0x8000 /* input buffer size */
+# define INBUFSIZ 0x40000 /* input buffer size */
# endif
#endif
#define INBUF_EXTRA 64 /* required by unlzw() */
#ifndef OUTBUFSIZ
-# ifdef IBM_Z_DFLTCC
-/* DEFLATE COMPRESSION CALL works faster with larger output buffers */
-# define OUTBUFSIZ 0x40000
-# elif defined SMALL_MEM
+# ifdef SMALL_MEM
# define OUTBUFSIZ 8192 /* output buffer size */
# else
-# define OUTBUFSIZ 16384 /* output buffer size */
+# define OUTBUFSIZ 0x40000 /* output buffer size */
# endif
#endif
#define OUTBUF_EXTRA 2048 /* required by unlzw() */
@@ -291,7 +285,7 @@ extern off_t flush_block (char *buf, ulg stored_len, int pad, int eof);
/* in bits.c */
extern unsigned short bi_buf;
-extern int bi_valid;
+extern int bi_valid;
extern void bi_init (file_t zipfile);
extern void send_bits (int value, int length);
extern unsigned bi_reverse (unsigned value, int length) _GL_ATTRIBUTE_CONST;
diff --git a/unzip.c b/unzip.c
index 86ef664..6d9bf68 100644
--- a/unzip.c
+++ b/unzip.c
@@ -130,7 +130,7 @@ int unzip(in, out)
if (method == DEFLATED) {
#ifdef IBM_Z_DFLTCC
- int res = dfltcc_inflate();
+ int res = dfltcc_inflate ();
#else
int res = inflate();
#endif
diff --git a/util.c b/util.c
index dc00f4a..dc66b20 100644
--- a/util.c
+++ b/util.c
@@ -96,10 +96,8 @@ static const ulg crc_32_tab[] = {
0x2d02ef8dL
};
-/* ========================================================================
- * Shift register contents
- */
-static ulg crc = (ulg)0xffffffffL;
+/* Shift register contents. */
+static ulg crc = 0xffffffffL;
/* ===========================================================================
* Copy input to output unchanged: zcat == cat with --force.
@@ -148,21 +146,18 @@ ulg updcrc(s, n)
return c ^ 0xffffffffL; /* (instead of ~c for 64-bit machines) */
}
-/* ===========================================================================
- * Return a current CRC value.
- */
-ulg getcrc()
+/* Return a current CRC value. */
+ulg
+getcrc (void)
{
- return crc ^ 0xffffffffL;
+ return crc ^ 0xffffffffL;
}
-/* ===========================================================================
- * Set a new CRC value.
- */
-void setcrc(c)
- ulg c;
+/* Set a new CRC value. */
+void
+setcrc (ulg c)
{
- crc = c ^ 0xffffffffL;
+ crc = c ^ 0xffffffffL;
}
/* ===========================================================================
@@ -258,9 +253,8 @@ void flush_outbuf()
{
if (outcnt == 0) return;
- if (!test) {
- write_buf(ofd, (char *)outbuf, outcnt);
- }
+ if (!test)
+ write_buf (ofd, outbuf, outcnt);
bytes_out += (off_t)outcnt;
outcnt = 0;
}
diff --git a/zip.c b/zip.c
index ace7e5e..0f12d5e 100644
--- a/zip.c
+++ b/zip.c
@@ -25,9 +25,8 @@
off_t header_bytes; /* number of bytes in gzip header */
-#define FAST 4
-#define SLOW 2
-/* speed options for the general purpose bit flag */
+/* Speed options for the general purpose bit flag. */
+enum { SLOW = 2, FAST = 4 };
/* ===========================================================================
* Deflate in to out.
@@ -71,15 +70,14 @@ int zip(in, out)
put_long (stamp);
/* Write deflated file to zip file */
- updcrc(NULL, 0);
+ updcrc (NULL, 0);
bi_init(out);
ct_init(&attr, &method);
- if (level == 1) {
- deflate_flags |= FAST;
- } else if (level == 9) {
- deflate_flags |= SLOW;
- }
+ if (level == 1)
+ deflate_flags |= FAST;
+ else if (level == 9)
+ deflate_flags |= SLOW;
put_byte((uch)deflate_flags); /* extra flags */
put_byte(OS_CODE); /* OS identifier */
@@ -93,9 +91,9 @@ int zip(in, out)
header_bytes = (off_t)outcnt;
#ifdef IBM_Z_DFLTCC
- (void)dfltcc_deflate(level);
+ dfltcc_deflate (level);
#else
- (void)deflate(level);
+ deflate (level);
#endif
#ifndef NO_SIZE_CHECK
@@ -109,7 +107,7 @@ int zip(in, out)
#endif
/* Write the crc and uncompressed size */
- put_long(getcrc());
+ put_long (getcrc ());
put_long((ulg)bytes_in);
header_bytes += 2*4;
@@ -137,7 +135,7 @@ int file_read(buf, size)
return EOF;
}
- updcrc((uch*)buf, len);
+ updcrc ((uch *) buf, len);
bytes_in += (off_t)len;
return (int)len;
}
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