Use PATH_MAX instead of MAXPATHLEN
[git/git.git] / git-compat-util.h
... / ...
CommitLineData
1#ifndef GIT_COMPAT_UTIL_H
2#define GIT_COMPAT_UTIL_H
3
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
12#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
13
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
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
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
72#ifdef NO_UNSETENV
73#define unsetenv gitunsetenv
74extern void gitunsetenv(const char *);
75#endif
76
77#ifdef NO_STRCASESTR
78#define strcasestr gitstrcasestr
79extern char *gitstrcasestr(const char *haystack, const char *needle);
80#endif
81
82#ifdef NO_STRLCPY
83#define strlcpy gitstrlcpy
84extern size_t gitstrlcpy(char *, const char *, size_t);
85#endif
86
87static inline void *xmalloc(size_t size)
88{
89 void *ret = malloc(size);
90 if (!ret && !size)
91 ret = malloc(1);
92 if (!ret)
93 die("Out of memory, malloc failed");
94#ifdef XMALLOC_POISON
95 memset(ret, 0xA5, size);
96#endif
97 return ret;
98}
99
100static inline void *xrealloc(void *ptr, size_t size)
101{
102 void *ret = realloc(ptr, size);
103 if (!ret && !size)
104 ret = realloc(ptr, 1);
105 if (!ret)
106 die("Out of memory, realloc failed");
107 return ret;
108}
109
110static inline void *xcalloc(size_t nmemb, size_t size)
111{
112 void *ret = calloc(nmemb, size);
113 if (!ret && (!nmemb || !size))
114 ret = calloc(1, 1);
115 if (!ret)
116 die("Out of memory, calloc failed");
117 return ret;
118}
119
120static inline ssize_t xread(int fd, void *buf, size_t len)
121{
122 ssize_t nr;
123 while (1) {
124 nr = read(fd, buf, len);
125 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
126 continue;
127 return nr;
128 }
129}
130
131static inline ssize_t xwrite(int fd, const void *buf, size_t len)
132{
133 ssize_t nr;
134 while (1) {
135 nr = write(fd, buf, len);
136 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
137 continue;
138 return nr;
139 }
140}
141
142static inline int has_extension(const char *filename, const char *ext)
143{
144 size_t len = strlen(filename);
145 size_t extlen = strlen(ext);
146 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
147}
148
149/* Sane ctype - no locale, and works with signed chars */
150#undef isspace
151#undef isdigit
152#undef isalpha
153#undef isalnum
154#undef tolower
155#undef toupper
156extern unsigned char sane_ctype[256];
157#define GIT_SPACE 0x01
158#define GIT_DIGIT 0x02
159#define GIT_ALPHA 0x04
160#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
161#define isspace(x) sane_istest(x,GIT_SPACE)
162#define isdigit(x) sane_istest(x,GIT_DIGIT)
163#define isalpha(x) sane_istest(x,GIT_ALPHA)
164#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
165#define tolower(x) sane_case((unsigned char)(x), 0x20)
166#define toupper(x) sane_case((unsigned char)(x), 0)
167
168static inline int sane_case(int x, int high)
169{
170 if (sane_istest(x, GIT_ALPHA))
171 x = (x & ~0x20) | high;
172 return x;
173}
174
175#endif