b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
146 lines
3.2 KiB
C
146 lines
3.2 KiB
C
/* $NetBSD: hashhl.c,v 1.4 2010/01/17 23:10:20 wiz Exp $ */
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/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@login.dkuug.dk> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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* ----------------------------------------------------------------------------
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*/
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/*
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* Modified September 24, 2005 by Elad Efrat <elad@NetBSD.org>
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* Modified April 29, 1997 by Jason R. Thorpe <thorpej@NetBSD.org>
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*/
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#ifdef HASH_ALGORITHM
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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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/*
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* Do all the name mangling before we include "namespace.h"
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*/
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#define CONCAT(x,y) __CONCAT(x,y)
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#ifndef HASH_FNPREFIX
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#define HASH_FNPREFIX HASH_ALGORITHM
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#endif /* !HASH_FNPREFIX */
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#define FNPREFIX(x) CONCAT(HASH_FNPREFIX,x)
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#define HASH_CTX CONCAT(HASH_ALGORITHM,_CTX)
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#define HASH_LEN CONCAT(HASH_ALGORITHM,_DIGEST_LENGTH)
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#define HASH_STRLEN CONCAT(HASH_ALGORITHM,_DIGEST_STRING_LENGTH)
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#if !defined(_KERNEL) && defined(__weak_alias) && !defined(HAVE_NBTOOL_CONFIG_H)
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#define WA(a,b) __weak_alias(a,b)
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WA(FNPREFIX(End),CONCAT(_,FNPREFIX(End)))
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WA(FNPREFIX(FileChunk),CONCAT(_,FNPREFIX(FileChunk)))
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WA(FNPREFIX(File),CONCAT(_,FNPREFIX(File)))
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WA(FNPREFIX(Data),CONCAT(_,FNPREFIX(Data)))
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#undef WA
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#endif
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#include "namespace.h"
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#include HASH_INCLUDE
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <assert.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#ifndef MIN
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#define MIN(x,y) ((x)<(y)?(x):(y))
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#endif /* !MIN */
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char *
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FNPREFIX(End)(HASH_CTX *ctx, char *buf)
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{
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int i;
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unsigned char digest[HASH_LEN];
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static const char hex[]="0123456789abcdef";
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_DIAGASSERT(ctx != 0);
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if (buf == NULL)
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buf = malloc((size_t)HASH_STRLEN);
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if (buf == NULL)
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return (NULL);
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FNPREFIX(Final)(digest, ctx);
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for (i = 0; i < HASH_LEN; i++) {
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buf[i+i] = hex[(u_int32_t)digest[i] >> 4];
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buf[i+i+1] = hex[digest[i] & 0x0f];
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}
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buf[i+i] = '\0';
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return (buf);
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}
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char *
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FNPREFIX(FileChunk)(const char *filename, char *buf, off_t off, off_t len)
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{
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struct stat sb;
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u_char buffer[BUFSIZ];
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HASH_CTX ctx;
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int fd, save_errno;
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ssize_t nr;
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FNPREFIX(Init)(&ctx);
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if ((fd = open(filename, O_RDONLY)) < 0)
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return (NULL);
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if (len == 0) {
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if (fstat(fd, &sb) == -1) {
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close(fd);
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return (NULL);
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}
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len = sb.st_size;
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}
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if (off > 0 && lseek(fd, off, SEEK_SET) < 0) {
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close(fd);
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return (NULL);
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}
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while ((nr = read(fd, buffer, (size_t) MIN((off_t)sizeof(buffer), len)))
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> 0) {
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FNPREFIX(Update)(&ctx, buffer, (unsigned int)nr);
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if (len > 0 && (len -= nr) == 0)
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break;
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}
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save_errno = errno;
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close(fd);
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errno = save_errno;
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return (nr < 0 ? NULL : FNPREFIX(End)(&ctx, buf));
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}
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char *
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FNPREFIX(File)(const char *filename, char *buf)
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{
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return (FNPREFIX(FileChunk)(filename, buf, (off_t)0, (off_t)0));
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}
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char *
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FNPREFIX(Data)(const unsigned char *data, size_t len, char *buf)
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{
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HASH_CTX ctx;
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_DIAGASSERT(data != 0);
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FNPREFIX(Init)(&ctx);
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FNPREFIX(Update)(&ctx, data, (unsigned int)len);
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return (FNPREFIX(End)(&ctx, buf));
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}
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#endif /* HASH_ALGORITHM */
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