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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 | ||
b4f2a6ac JH |
12 | #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0])) |
13 | ||
4050c0df JH |
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 | ||
d0c2449f JH |
29 | /* On most systems <limits.h> would have given us this, but |
30 | * not on some systems (e.g. GNU/Hurd). | |
31 | */ | |
32 | #ifndef PATH_MAX | |
33 | #define PATH_MAX 4096 | |
34 | #endif | |
35 | ||
4050c0df JH |
36 | #ifdef __GNUC__ |
37 | #define NORETURN __attribute__((__noreturn__)) | |
38 | #else | |
39 | #define NORETURN | |
40 | #ifndef __attribute__ | |
41 | #define __attribute__(x) | |
42 | #endif | |
43 | #endif | |
44 | ||
45 | /* General helper functions */ | |
46 | extern void usage(const char *err) NORETURN; | |
47 | extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2))); | |
48 | extern int error(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
49 | ||
39a3f5ea PB |
50 | extern void set_usage_routine(void (*routine)(const char *err) NORETURN); |
51 | extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN); | |
52 | extern void set_error_routine(void (*routine)(const char *err, va_list params)); | |
53 | ||
4050c0df JH |
54 | #ifdef NO_MMAP |
55 | ||
56 | #ifndef PROT_READ | |
57 | #define PROT_READ 1 | |
58 | #define PROT_WRITE 2 | |
59 | #define MAP_PRIVATE 1 | |
60 | #define MAP_FAILED ((void*)-1) | |
61 | #endif | |
62 | ||
63 | #define mmap gitfakemmap | |
64 | #define munmap gitfakemunmap | |
65 | extern void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset); | |
66 | extern int gitfakemunmap(void *start, size_t length); | |
67 | ||
68 | #else /* NO_MMAP */ | |
69 | ||
70 | #include <sys/mman.h> | |
71 | ||
72 | #endif /* NO_MMAP */ | |
73 | ||
74 | #ifdef NO_SETENV | |
75 | #define setenv gitsetenv | |
76 | extern int gitsetenv(const char *, const char *, int); | |
77 | #endif | |
78 | ||
731043fd JR |
79 | #ifdef NO_UNSETENV |
80 | #define unsetenv gitunsetenv | |
81 | extern void gitunsetenv(const char *); | |
82 | #endif | |
83 | ||
4050c0df JH |
84 | #ifdef NO_STRCASESTR |
85 | #define strcasestr gitstrcasestr | |
86 | extern char *gitstrcasestr(const char *haystack, const char *needle); | |
87 | #endif | |
88 | ||
817151e6 PE |
89 | #ifdef NO_STRLCPY |
90 | #define strlcpy gitstrlcpy | |
91 | extern size_t gitstrlcpy(char *, const char *, size_t); | |
92 | #endif | |
93 | ||
9befac47 SP |
94 | static inline char* xstrdup(const char *str) |
95 | { | |
96 | char *ret = strdup(str); | |
97 | if (!ret) | |
98 | die("Out of memory, strdup failed"); | |
99 | return ret; | |
100 | } | |
101 | ||
4050c0df JH |
102 | static inline void *xmalloc(size_t size) |
103 | { | |
104 | void *ret = malloc(size); | |
4e7a2ecc JH |
105 | if (!ret && !size) |
106 | ret = malloc(1); | |
4050c0df JH |
107 | if (!ret) |
108 | die("Out of memory, malloc failed"); | |
aa5481c1 JH |
109 | #ifdef XMALLOC_POISON |
110 | memset(ret, 0xA5, size); | |
111 | #endif | |
4050c0df JH |
112 | return ret; |
113 | } | |
114 | ||
115 | static inline void *xrealloc(void *ptr, size_t size) | |
116 | { | |
117 | void *ret = realloc(ptr, size); | |
4e7a2ecc JH |
118 | if (!ret && !size) |
119 | ret = realloc(ptr, 1); | |
4050c0df JH |
120 | if (!ret) |
121 | die("Out of memory, realloc failed"); | |
122 | return ret; | |
123 | } | |
124 | ||
125 | static inline void *xcalloc(size_t nmemb, size_t size) | |
126 | { | |
127 | void *ret = calloc(nmemb, size); | |
4e7a2ecc JH |
128 | if (!ret && (!nmemb || !size)) |
129 | ret = calloc(1, 1); | |
4050c0df JH |
130 | if (!ret) |
131 | die("Out of memory, calloc failed"); | |
132 | return ret; | |
133 | } | |
134 | ||
1c15afb9 JH |
135 | static inline ssize_t xread(int fd, void *buf, size_t len) |
136 | { | |
137 | ssize_t nr; | |
138 | while (1) { | |
139 | nr = read(fd, buf, len); | |
140 | if ((nr < 0) && (errno == EAGAIN || errno == EINTR)) | |
141 | continue; | |
142 | return nr; | |
143 | } | |
144 | } | |
145 | ||
146 | static inline ssize_t xwrite(int fd, const void *buf, size_t len) | |
147 | { | |
148 | ssize_t nr; | |
149 | while (1) { | |
150 | nr = write(fd, buf, len); | |
151 | if ((nr < 0) && (errno == EAGAIN || errno == EINTR)) | |
152 | continue; | |
153 | return nr; | |
154 | } | |
155 | } | |
156 | ||
5bb1cda5 | 157 | static inline int has_extension(const char *filename, const char *ext) |
83a2b841 | 158 | { |
5bb1cda5 RS |
159 | size_t len = strlen(filename); |
160 | size_t extlen = strlen(ext); | |
83a2b841 RS |
161 | return len > extlen && !memcmp(filename + len - extlen, ext, extlen); |
162 | } | |
163 | ||
4050c0df JH |
164 | /* Sane ctype - no locale, and works with signed chars */ |
165 | #undef isspace | |
166 | #undef isdigit | |
167 | #undef isalpha | |
168 | #undef isalnum | |
169 | #undef tolower | |
170 | #undef toupper | |
171 | extern unsigned char sane_ctype[256]; | |
172 | #define GIT_SPACE 0x01 | |
173 | #define GIT_DIGIT 0x02 | |
174 | #define GIT_ALPHA 0x04 | |
175 | #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) | |
176 | #define isspace(x) sane_istest(x,GIT_SPACE) | |
177 | #define isdigit(x) sane_istest(x,GIT_DIGIT) | |
178 | #define isalpha(x) sane_istest(x,GIT_ALPHA) | |
179 | #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) | |
180 | #define tolower(x) sane_case((unsigned char)(x), 0x20) | |
181 | #define toupper(x) sane_case((unsigned char)(x), 0) | |
182 | ||
183 | static inline int sane_case(int x, int high) | |
184 | { | |
185 | if (sane_istest(x, GIT_ALPHA)) | |
186 | x = (x & ~0x20) | high; | |
187 | return x; | |
188 | } | |
189 | ||
190 | #endif |