Rename safe_strncpy() to strlcpy().
[git/git.git] / git-compat-util.h
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1#ifndef GIT_COMPAT_UTIL_H
2#define GIT_COMPAT_UTIL_H
3
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4#ifndef FLEX_ARRAY
5#if defined(__GNUC__) && (__GNUC__ < 3)
6#define FLEX_ARRAY 0
7#else
8#define FLEX_ARRAY /* empty */
9#endif
10#endif
11
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12#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
13
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14#include <unistd.h>
15#include <stdio.h>
16#include <sys/stat.h>
17#include <fcntl.h>
18#include <stddef.h>
19#include <stdlib.h>
20#include <stdarg.h>
21#include <string.h>
22#include <errno.h>
23#include <limits.h>
24#include <sys/param.h>
25#include <netinet/in.h>
26#include <sys/types.h>
27#include <dirent.h>
28
29#ifdef __GNUC__
30#define NORETURN __attribute__((__noreturn__))
31#else
32#define NORETURN
33#ifndef __attribute__
34#define __attribute__(x)
35#endif
36#endif
37
38/* General helper functions */
39extern void usage(const char *err) NORETURN;
40extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
41extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
42
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43extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
44extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
45extern void set_error_routine(void (*routine)(const char *err, va_list params));
46
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47#ifdef NO_MMAP
48
49#ifndef PROT_READ
50#define PROT_READ 1
51#define PROT_WRITE 2
52#define MAP_PRIVATE 1
53#define MAP_FAILED ((void*)-1)
54#endif
55
56#define mmap gitfakemmap
57#define munmap gitfakemunmap
58extern void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset);
59extern int gitfakemunmap(void *start, size_t length);
60
61#else /* NO_MMAP */
62
63#include <sys/mman.h>
64
65#endif /* NO_MMAP */
66
67#ifdef NO_SETENV
68#define setenv gitsetenv
69extern int gitsetenv(const char *, const char *, int);
70#endif
71
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72#ifdef NO_UNSETENV
73#define unsetenv gitunsetenv
74extern void gitunsetenv(const char *);
75#endif
76
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77#ifdef NO_STRCASESTR
78#define strcasestr gitstrcasestr
79extern char *gitstrcasestr(const char *haystack, const char *needle);
80#endif
81
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82#ifdef NO_STRLCPY
83#define strlcpy gitstrlcpy
84extern size_t gitstrlcpy(char *, const char *, size_t);
85#endif
86
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87static inline void *xmalloc(size_t size)
88{
89 void *ret = malloc(size);
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90 if (!ret && !size)
91 ret = malloc(1);
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92 if (!ret)
93 die("Out of memory, malloc failed");
94 return ret;
95}
96
97static inline void *xrealloc(void *ptr, size_t size)
98{
99 void *ret = realloc(ptr, size);
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100 if (!ret && !size)
101 ret = realloc(ptr, 1);
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102 if (!ret)
103 die("Out of memory, realloc failed");
104 return ret;
105}
106
107static inline void *xcalloc(size_t nmemb, size_t size)
108{
109 void *ret = calloc(nmemb, size);
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110 if (!ret && (!nmemb || !size))
111 ret = calloc(1, 1);
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112 if (!ret)
113 die("Out of memory, calloc failed");
114 return ret;
115}
116
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117static inline ssize_t xread(int fd, void *buf, size_t len)
118{
119 ssize_t nr;
120 while (1) {
121 nr = read(fd, buf, len);
122 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
123 continue;
124 return nr;
125 }
126}
127
128static inline ssize_t xwrite(int fd, const void *buf, size_t len)
129{
130 ssize_t nr;
131 while (1) {
132 nr = write(fd, buf, len);
133 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
134 continue;
135 return nr;
136 }
137}
138
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139/* Sane ctype - no locale, and works with signed chars */
140#undef isspace
141#undef isdigit
142#undef isalpha
143#undef isalnum
144#undef tolower
145#undef toupper
146extern unsigned char sane_ctype[256];
147#define GIT_SPACE 0x01
148#define GIT_DIGIT 0x02
149#define GIT_ALPHA 0x04
150#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
151#define isspace(x) sane_istest(x,GIT_SPACE)
152#define isdigit(x) sane_istest(x,GIT_DIGIT)
153#define isalpha(x) sane_istest(x,GIT_ALPHA)
154#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
155#define tolower(x) sane_case((unsigned char)(x), 0x20)
156#define toupper(x) sane_case((unsigned char)(x), 0)
157
158static inline int sane_case(int x, int high)
159{
160 if (sane_istest(x, GIT_ALPHA))
161 x = (x & ~0x20) | high;
162 return x;
163}
164
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165#ifndef MAXPATHLEN
166#define MAXPATHLEN 256
167#endif
4050c0df 168#endif