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4050c0df JH |
1 | #ifndef GIT_COMPAT_UTIL_H |
2 | #define GIT_COMPAT_UTIL_H | |
3 | ||
8f1d2e6f JH |
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 | ||
4050c0df JH |
12 | #include <unistd.h> |
13 | #include <stdio.h> | |
14 | #include <sys/stat.h> | |
15 | #include <fcntl.h> | |
16 | #include <stddef.h> | |
17 | #include <stdlib.h> | |
18 | #include <stdarg.h> | |
19 | #include <string.h> | |
20 | #include <errno.h> | |
21 | #include <limits.h> | |
22 | #include <sys/param.h> | |
23 | #include <netinet/in.h> | |
24 | #include <sys/types.h> | |
25 | #include <dirent.h> | |
26 | ||
27 | #ifdef __GNUC__ | |
28 | #define NORETURN __attribute__((__noreturn__)) | |
29 | #else | |
30 | #define NORETURN | |
31 | #ifndef __attribute__ | |
32 | #define __attribute__(x) | |
33 | #endif | |
34 | #endif | |
35 | ||
36 | /* General helper functions */ | |
37 | extern void usage(const char *err) NORETURN; | |
38 | extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2))); | |
39 | extern int error(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
40 | ||
41 | #ifdef NO_MMAP | |
42 | ||
43 | #ifndef PROT_READ | |
44 | #define PROT_READ 1 | |
45 | #define PROT_WRITE 2 | |
46 | #define MAP_PRIVATE 1 | |
47 | #define MAP_FAILED ((void*)-1) | |
48 | #endif | |
49 | ||
50 | #define mmap gitfakemmap | |
51 | #define munmap gitfakemunmap | |
52 | extern void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset); | |
53 | extern int gitfakemunmap(void *start, size_t length); | |
54 | ||
55 | #else /* NO_MMAP */ | |
56 | ||
57 | #include <sys/mman.h> | |
58 | ||
59 | #endif /* NO_MMAP */ | |
60 | ||
61 | #ifdef NO_SETENV | |
62 | #define setenv gitsetenv | |
63 | extern int gitsetenv(const char *, const char *, int); | |
64 | #endif | |
65 | ||
731043fd JR |
66 | #ifdef NO_UNSETENV |
67 | #define unsetenv gitunsetenv | |
68 | extern void gitunsetenv(const char *); | |
69 | #endif | |
70 | ||
4050c0df JH |
71 | #ifdef NO_STRCASESTR |
72 | #define strcasestr gitstrcasestr | |
73 | extern char *gitstrcasestr(const char *haystack, const char *needle); | |
74 | #endif | |
75 | ||
76 | static inline void *xmalloc(size_t size) | |
77 | { | |
78 | void *ret = malloc(size); | |
4e7a2ecc JH |
79 | if (!ret && !size) |
80 | ret = malloc(1); | |
4050c0df JH |
81 | if (!ret) |
82 | die("Out of memory, malloc failed"); | |
83 | return ret; | |
84 | } | |
85 | ||
86 | static inline void *xrealloc(void *ptr, size_t size) | |
87 | { | |
88 | void *ret = realloc(ptr, size); | |
4e7a2ecc JH |
89 | if (!ret && !size) |
90 | ret = realloc(ptr, 1); | |
4050c0df JH |
91 | if (!ret) |
92 | die("Out of memory, realloc failed"); | |
93 | return ret; | |
94 | } | |
95 | ||
96 | static inline void *xcalloc(size_t nmemb, size_t size) | |
97 | { | |
98 | void *ret = calloc(nmemb, size); | |
4e7a2ecc JH |
99 | if (!ret && (!nmemb || !size)) |
100 | ret = calloc(1, 1); | |
4050c0df JH |
101 | if (!ret) |
102 | die("Out of memory, calloc failed"); | |
103 | return ret; | |
104 | } | |
105 | ||
1c15afb9 JH |
106 | static inline ssize_t xread(int fd, void *buf, size_t len) |
107 | { | |
108 | ssize_t nr; | |
109 | while (1) { | |
110 | nr = read(fd, buf, len); | |
111 | if ((nr < 0) && (errno == EAGAIN || errno == EINTR)) | |
112 | continue; | |
113 | return nr; | |
114 | } | |
115 | } | |
116 | ||
117 | static inline ssize_t xwrite(int fd, const void *buf, size_t len) | |
118 | { | |
119 | ssize_t nr; | |
120 | while (1) { | |
121 | nr = write(fd, buf, len); | |
122 | if ((nr < 0) && (errno == EAGAIN || errno == EINTR)) | |
123 | continue; | |
124 | return nr; | |
125 | } | |
126 | } | |
127 | ||
4050c0df JH |
128 | /* Sane ctype - no locale, and works with signed chars */ |
129 | #undef isspace | |
130 | #undef isdigit | |
131 | #undef isalpha | |
132 | #undef isalnum | |
133 | #undef tolower | |
134 | #undef toupper | |
135 | extern unsigned char sane_ctype[256]; | |
136 | #define GIT_SPACE 0x01 | |
137 | #define GIT_DIGIT 0x02 | |
138 | #define GIT_ALPHA 0x04 | |
139 | #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) | |
140 | #define isspace(x) sane_istest(x,GIT_SPACE) | |
141 | #define isdigit(x) sane_istest(x,GIT_DIGIT) | |
142 | #define isalpha(x) sane_istest(x,GIT_ALPHA) | |
143 | #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) | |
144 | #define tolower(x) sane_case((unsigned char)(x), 0x20) | |
145 | #define toupper(x) sane_case((unsigned char)(x), 0) | |
146 | ||
147 | static inline int sane_case(int x, int high) | |
148 | { | |
149 | if (sane_istest(x, GIT_ALPHA)) | |
150 | x = (x & ~0x20) | high; | |
151 | return x; | |
152 | } | |
153 | ||
252fef71 MA |
154 | #ifndef MAXPATHLEN |
155 | #define MAXPATHLEN 256 | |
156 | #endif | |
4050c0df | 157 | #endif |