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
|
#include <assert.h>
#include <errno.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "eprintf.h"
static char *pname;
static int debug = 0;
// doprintf: print error message
__attribute__((format(printf, 1, 0)))
static void doprintf(const char *fmt, va_list va, int errnum)
{
assert(fmt != NULL);
if (pname != NULL)
fprintf(stderr, "%s: ", pname);
vfprintf(stderr, fmt, va);
if (fmt[0] != '\0' && fmt[strlen(fmt) - 1] == ':')
fprintf(stderr, " %s", strerror(errnum));
fputc('\n', stderr);
}
// eprintf: print error and exit, a trailing : in fmt prints strerror(errno)
void eprintf(const char *fmt, ...)
{
va_list va;
va_start(va, fmt);
doprintf(fmt, va, errno); // TODO: can va_start set errno
va_end(va);
exit(EXIT_FAILURE);
}
// weprintf: print warning, a trailing : in fmt prints strerror(errno)
void weprintf(const char *fmt, ...)
{
va_list va;
va_start(va, fmt);
doprintf(fmt, va, errno); // TODO: Ditto
va_end(va);
}
// deprintf: print debug message if debugging is enabled
void deprintf(const char *fmt, ...)
{
va_list va;
assert(fmt != NULL);
if (!debug)
return;
if (pname != NULL)
fprintf(stderr, "%s: ", pname);
fputs("debug: ", stderr);
va_start(va, fmt);
vfprintf(stderr, fmt, va);
va_end(va);
}
// estrdup: attempt to strdup a string or exit on error
char *estrdup(const char *s)
{
size_t len;
char *dup;
assert(s != NULL);
len = strlen(s);
if (len == SIZE_MAX)
eprintf("estrdup(\"%.20s\") failed: Too long", s);
dup = malloc(len + 1);
if (dup == NULL)
eprintf("estrdup(\"%.20s\") failed:", s);
strcpy(dup, s);
return dup;
}
// emalloc: attempt to allocate memory or exit on error
void *emalloc(size_t n)
{
void *p;
p = malloc(n);
if (p == NULL)
eprintf("emalloc(%zu) failed:", n);
return p;
}
// ecalloc: attempt to allocate memory or exit on error
void *ecalloc(size_t nmemb, size_t size)
{
void *p;
p = calloc(nmemb, size);
if (p == NULL)
eprintf("ecalloc(%zu, %zu) failed:", nmemb, size);
return p;
}
// erealloc: attempt to reallocate memory or exit on error
void *erealloc(void *p, size_t n)
{
void *r;
r = realloc(p, n);
if (r == NULL)
eprintf("erealloc(%p, %zu) failed:", p, n);
return r;
}
// setprogname: set stored name of program
void setprogname(const char *s)
{
assert(s != NULL);
if (pname != NULL) {
weprintf("setprogname(\"%.20s\") called more than once", s);
return;
}
pname = estrdup(s);
}
// setdebug: set debug
void setdebug(int d)
{
debug = d;
}
|
