code comments: spell
[git/git.git] / git-compat-util.h
CommitLineData
4050c0df
JH
1#ifndef GIT_COMPAT_UTIL_H
2#define GIT_COMPAT_UTIL_H
3
4#include <unistd.h>
5#include <stdio.h>
6#include <sys/stat.h>
7#include <fcntl.h>
8#include <stddef.h>
9#include <stdlib.h>
10#include <stdarg.h>
11#include <string.h>
12#include <errno.h>
13#include <limits.h>
14#include <sys/param.h>
15#include <netinet/in.h>
16#include <sys/types.h>
17#include <dirent.h>
18
19#ifdef __GNUC__
20#define NORETURN __attribute__((__noreturn__))
21#else
22#define NORETURN
23#ifndef __attribute__
24#define __attribute__(x)
25#endif
26#endif
27
28/* General helper functions */
29extern void usage(const char *err) NORETURN;
30extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
31extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
32
33#ifdef NO_MMAP
34
35#ifndef PROT_READ
36#define PROT_READ 1
37#define PROT_WRITE 2
38#define MAP_PRIVATE 1
39#define MAP_FAILED ((void*)-1)
40#endif
41
42#define mmap gitfakemmap
43#define munmap gitfakemunmap
44extern void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset);
45extern int gitfakemunmap(void *start, size_t length);
46
47#else /* NO_MMAP */
48
49#include <sys/mman.h>
50
51#endif /* NO_MMAP */
52
53#ifdef NO_SETENV
54#define setenv gitsetenv
55extern int gitsetenv(const char *, const char *, int);
56#endif
57
58#ifdef NO_STRCASESTR
59#define strcasestr gitstrcasestr
60extern char *gitstrcasestr(const char *haystack, const char *needle);
61#endif
62
63static inline void *xmalloc(size_t size)
64{
65 void *ret = malloc(size);
66 if (!ret)
67 die("Out of memory, malloc failed");
68 return ret;
69}
70
71static inline void *xrealloc(void *ptr, size_t size)
72{
73 void *ret = realloc(ptr, size);
74 if (!ret)
75 die("Out of memory, realloc failed");
76 return ret;
77}
78
79static inline void *xcalloc(size_t nmemb, size_t size)
80{
81 void *ret = calloc(nmemb, size);
82 if (!ret)
83 die("Out of memory, calloc failed");
84 return ret;
85}
86
1c15afb9
JH
87static inline ssize_t xread(int fd, void *buf, size_t len)
88{
89 ssize_t nr;
90 while (1) {
91 nr = read(fd, buf, len);
92 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
93 continue;
94 return nr;
95 }
96}
97
98static inline ssize_t xwrite(int fd, const void *buf, size_t len)
99{
100 ssize_t nr;
101 while (1) {
102 nr = write(fd, buf, len);
103 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
104 continue;
105 return nr;
106 }
107}
108
4050c0df
JH
109/* Sane ctype - no locale, and works with signed chars */
110#undef isspace
111#undef isdigit
112#undef isalpha
113#undef isalnum
114#undef tolower
115#undef toupper
116extern unsigned char sane_ctype[256];
117#define GIT_SPACE 0x01
118#define GIT_DIGIT 0x02
119#define GIT_ALPHA 0x04
120#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
121#define isspace(x) sane_istest(x,GIT_SPACE)
122#define isdigit(x) sane_istest(x,GIT_DIGIT)
123#define isalpha(x) sane_istest(x,GIT_ALPHA)
124#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
125#define tolower(x) sane_case((unsigned char)(x), 0x20)
126#define toupper(x) sane_case((unsigned char)(x), 0)
127
128static inline int sane_case(int x, int high)
129{
130 if (sane_istest(x, GIT_ALPHA))
131 x = (x & ~0x20) | high;
132 return x;
133}
134
252fef71
MA
135#ifndef MAXPATHLEN
136#define MAXPATHLEN 256
137#endif
4050c0df 138#endif