stdio.c revision 290001 
1/*
2 * Copyright (C) 2004, 2007  Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2000, 2001  Internet Software Consortium.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
16 */
17
18/* $Id: stdio.c,v 1.6 2007/06/19 23:47:19 tbox Exp $ */
19
20#include <config.h>
21
22#include <io.h>
23#include <errno.h>
24
25#include <isc/stdio.h>
26
27#include "errno2result.h"
28
29isc_result_t
30isc_stdio_open(const char *filename, const char *mode, FILE **fp) {
31	FILE *f;
32
33	f = fopen(filename, mode);
34	if (f == NULL)
35		return (isc__errno2result(errno));
36	*fp = f;
37	return (ISC_R_SUCCESS);
38}
39
40isc_result_t
41isc_stdio_close(FILE *f) {
42	int r;
43
44	r = fclose(f);
45	if (r == 0)
46		return (ISC_R_SUCCESS);
47	else
48		return (isc__errno2result(errno));
49}
50
51isc_result_t
52isc_stdio_seek(FILE *f, long offset, int whence) {
53	int r;
54
55	r = fseek(f, offset, whence);
56	if (r == 0)
57		return (ISC_R_SUCCESS);
58	else
59		return (isc__errno2result(errno));
60}
61
62isc_result_t
63isc_stdio_read(void *ptr, size_t size, size_t nmemb, FILE *f, size_t *nret) {
64	isc_result_t result = ISC_R_SUCCESS;
65	size_t r;
66
67	clearerr(f);
68	r = fread(ptr, size, nmemb, f);
69	if (r != nmemb) {
70		if (feof(f))
71			result = ISC_R_EOF;
72		else
73			result = isc__errno2result(errno);
74	}
75	if (nret != NULL)
76		*nret = r;
77	return (result);
78}
79
80isc_result_t
81isc_stdio_write(const void *ptr, size_t size, size_t nmemb, FILE *f,
82	       size_t *nret)
83{
84	isc_result_t result = ISC_R_SUCCESS;
85	size_t r;
86
87	clearerr(f);
88	r = fwrite(ptr, size, nmemb, f);
89	if (r != nmemb)
90		result = isc__errno2result(errno);
91	if (nret != NULL)
92		*nret = r;
93	return (result);
94}
95
96isc_result_t
97isc_stdio_flush(FILE *f) {
98	int r;
99
100	r = fflush(f);
101	if (r == 0)
102		return (ISC_R_SUCCESS);
103	else
104		return (isc__errno2result(errno));
105}
106
107isc_result_t
108isc_stdio_sync(FILE *f) {
109	int r;
110
111	r = _commit(_fileno(f));
112	if (r == 0)
113		return (ISC_R_SUCCESS);
114	else
115		return (isc__errno2result(errno));
116}
117
118