-
-
Notifications
You must be signed in to change notification settings - Fork 134
/
util.c
194 lines (168 loc) · 4.12 KB
/
util.c
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
#include "util.h"
#include <assert.h>
#include <errno.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <float.h>
static log_level_e log_level = LOG_NOTES;
bool is_integer(double i)
{
double integral = 0, fractional = 0;
fractional = modf(i, &integral);
return fabs(fractional) < DBL_EPSILON; /*is the fractional bit zero?*/
}
bool is_power_of_two(uint64_t n)
{
return (n > 0 && ((n & (n - 1)) == 0));
}
double fractional(double x)
{
double i = 0;
return modf(x, &i);
}
bool verbose(log_level_e level)
{
return level <= log_level && log_level != LOG_NO_MESSAGES;
}
void set_log_level(log_level_e level)
{
log_level = level;
}
log_level_e get_log_level(void)
{
return log_level;
}
const char *emsg(void)
{
return errno ? strerror(errno) : "unknown reason";
}
static void logmsg(log_level_e ll, const char *prefix, const char *fmt, va_list ap)
{
assert(prefix && fmt && ll < LOG_ALL_MESSAGES);
if (!verbose(ll))
return;
fputs(prefix , stderr);
vfprintf(stderr, fmt, ap);
fputc('\n', stderr);
}
#define LOG_INTERAL(LEVEL, PREFIX, FMT)\
do {\
va_list args;\
assert(fmt);\
va_start(args, fmt);\
logmsg((LEVEL), (PREFIX), (FMT), args);\
va_end(args);\
} while (0);
void error(const char *fmt, ...)
{
assert(fmt);
LOG_INTERAL(LOG_ERRORS, "error: ", fmt);
exit(EXIT_FAILURE);
}
void warning(const char *fmt, ...)
{
assert(fmt);
LOG_INTERAL(LOG_WARNINGS, "warning: ", fmt);
}
void note(const char *fmt, ...)
{
assert(fmt);
LOG_INTERAL(LOG_NOTES, "note: ", fmt);
}
void debug(const char *fmt, ...)
{
assert(fmt);
LOG_INTERAL(LOG_DEBUG, "debug: ", fmt);
}
FILE *fopen_or_die(const char *name, const char *mode)
{
assert(name && mode);
errno = 0;
FILE *r = fopen(name, mode);
if (!r)
error("open '%s' (mode '%s'): %s", name, mode, emsg());
return r;
}
void *allocate(size_t sz)
{
errno = 0;
void *r = calloc(sz, 1);
if (!r)
error("allocate failed: %s", emsg());
return r;
}
void *reallocator(void *p, size_t n)
{
void *r = realloc(p, n);
if (!r)
error("reallocator failed: %s", emsg());
return r;
}
char *duplicate(const char *s)
{
assert(s);
size_t length = strlen(s) + 1;
char *r = allocate(length);
memcpy(r, s, length);
return r;
}
/**@warning does not work for large file >4GB */
char *slurp(FILE *f)
{
assert(f);
long length = 0, r = 0;
char *b = NULL;
errno = 0;
if ((r = fseek(f, 0, SEEK_END)) < 0)
goto fail;
errno = 0;
if ((r = length = ftell(f)) < 0)
goto fail;
errno = 0;
if ((r = fseek(f, 0, SEEK_SET)) < 0)
goto fail;
b = allocate(length + 1);
errno = 0;
if ((unsigned long)length != fread(b, 1, length, f))
goto fail;
return b;
fail:
free(b);
fprintf(stderr, "slurp failed: %s", emsg());
return NULL;
}
/* Stolen from musl-libc!
* <https://www.musl-libc.org/download.html>
*
----------------------------------------------------------------------
Copyright © 2005-2014 Rich Felker, et al.
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
----------------------------------------------------------------------
*/
char *dbcc_basename(char *s)
{
assert(s);
size_t i;
if (!s || !*s) return ".";
i = strlen(s)-1;
for (; i&&s[i]=='/'; i--) s[i] = 0;
for (; i&&s[i-1]!='/'; i--);
return s+i;
}