1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
#define _XOPEN_SOURCE 500
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifndef _WIN32
#include <sys/mman.h>
#endif
#include <errno.h>
#include <string.h>
#include <unistd.h>
/* Print formated string into automtically reallocated @uffer.
* @buffer automatically reallocated buffer. Must be &NULL or preallocated
* memory.
* @format format string as for printf(3)
* @ap list of variadic arguments, after call will be in udefined state
* @Returns number of bytes printed. In case of errror, -1 and NULL @buffer */
int test_vasprintf(char **buffer, const char *format, va_list ap) {
va_list aq;
int length, new_length;
char *new_buffer;
if (!buffer || !format) {
if (buffer) {
free(*buffer);
*buffer = NULL;
}
return -1;
}
va_copy(aq, ap);
length = vsnprintf(NULL, 0, format, aq) + 1;
va_end(aq);
if (length <= 0) {
free(*buffer);
*buffer = NULL;
return -1;
}
new_buffer = realloc(*buffer, length);
if (!new_buffer) {
free(*buffer);
*buffer = NULL;
return -1;
}
*buffer = new_buffer;
new_length = vsnprintf(*buffer, length, format, ap);
if (new_length >= length) {
free(*buffer);
*buffer = NULL;
return -1;
}
return new_length;
}
/* Print formated string into automtically reallocated @uffer.
* @buffer automatically reallocated buffer. Must be &NULL or preallocated
* memory.
* @format format string as for printf(3)
* @... variadic arguments
* @Returns number of bytes printed. In case of errror, -1 and NULL @buffer */
int test_asprintf(char **buffer, const char *format, ...) {
int ret;
va_list ap;
va_start(ap, format);
ret = test_vasprintf(buffer, format, ap);
va_end(ap);
return ret;
}
#ifdef _WIN32
int test_mmap_file(const char *file, int *fd, void **buffer, size_t *length) {
struct stat file_info;
int ret, pos = 0;
if (!file || !fd || !buffer || !length) return -1;
*fd = open(file, O_RDONLY);
if (*fd == -1) {
fprintf(stderr, "%s: Could not open file: %s\n", file, strerror(errno));
return -1;
}
if (-1 == fstat(*fd, &file_info)) {
fprintf(stderr, "%s: Could not get file size: %s\n", file,
strerror(errno));
close(*fd);
return -1;
}
if (file_info.st_size < 0) {
fprintf(stderr, "File `%s' has negative size: %jd\n", file,
(intmax_t) file_info.st_size);
close(*fd);
return -1;
}
*length = file_info.st_size;
*buffer = malloc(*length);
if (!*buffer) {
fprintf(stderr, "%s: Could not allocate memory for file mapping: %s\n",
file, strerror(errno));
close(*fd);
return -1;
}
do {
ret = read(*fd, *buffer + pos, *length - pos);
if (ret > 0) {
pos += ret;
}
} while ((ret < 0 && errno == EINTR) || (ret > 0 && pos < *length));
if (ret < 0) {
fprintf(stderr, "%s: Could not map file to memory: %s\n", file,
strerror(errno));
free(*buffer);
*buffer = NULL;
close(*fd);
return -1;
}
return 0;
}
int test_munmap_file(int fd, void *buffer, size_t length) {
int err = 0;
free(buffer);
err = close(fd);
if (err) {
fprintf(stderr, "Could close file descriptor %d: %s\n", fd,
strerror(errno));
}
return err;
}
#else
int test_mmap_file(const char *file, int *fd, void **buffer, size_t *length) {
struct stat file_info;
if (!file || !fd || !buffer || !length) return -1;
*fd = open(file, O_RDONLY);
if (*fd == -1) {
fprintf(stderr, "%s: Could not open file: %s\n", file, strerror(errno));
return -1;
}
if (-1 == fstat(*fd, &file_info)) {
fprintf(stderr, "%s: Could not get file size: %s\n", file,
strerror(errno));
close(*fd);
return -1;
}
if (file_info.st_size < 0) {
fprintf(stderr, "File `%s' has negative size: %jd\n", file,
(intmax_t) file_info.st_size);
close(*fd);
return -1;
}
*length = file_info.st_size;
*buffer = mmap(NULL, *length, PROT_READ, MAP_PRIVATE, *fd, 0);
if (*buffer == MAP_FAILED) {
fprintf(stderr, "%s: Could not map file to memory: %s\n", file,
strerror(errno));
close(*fd);
return -1;
}
return 0;
}
int test_munmap_file(int fd, void *buffer, size_t length) {
int err = 0;
long int page_size = sysconf(_SC_PAGE_SIZE);
size_t pages = (length % page_size) ?
((length / page_size) + 1) * page_size:
length;
err = munmap(buffer, pages);
if (err) {
fprintf(stderr, "Could not unmap memory at %p and length %zu: %s\n",
buffer, pages, strerror(errno));
}
err = close(fd);
if (err) {
fprintf(stderr, "Could close file descriptor %d: %s\n", fd,
strerror(errno));
}
return err;
}
#endif
|
