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#if !defined(__APPLE__) && !defined(__FreeBSD__)
15#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
16#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
17#endif
18#define _GNU_SOURCE
19#define _BSD_SOURCE
20
21#include <unistd.h>
22#include <stdio.h>
23#include <sys/stat.h>
24#include <fcntl.h>
25#include <stddef.h>
26#include <stdlib.h>
27#include <stdarg.h>
28#include <string.h>
29#include <errno.h>
30#include <limits.h>
31#include <sys/param.h>
32#include <sys/types.h>
33#include <dirent.h>
34#include <sys/time.h>
35#include <time.h>
36#include <signal.h>
37#include <sys/wait.h>
38#include <fnmatch.h>
39#include <sys/poll.h>
40#include <sys/socket.h>
41#include <assert.h>
42#include <regex.h>
43#include <netinet/in.h>
44#include <netinet/tcp.h>
45#include <arpa/inet.h>
46#include <netdb.h>
47#include <pwd.h>
48#include <grp.h>
49
50#ifndef NO_ICONV
51#include <iconv.h>
52#endif
53
54/* On most systems <limits.h> would have given us this, but
55 * not on some systems (e.g. GNU/Hurd).
56 */
57#ifndef PATH_MAX
58#define PATH_MAX 4096
59#endif
60
61#ifdef __GNUC__
62#define NORETURN __attribute__((__noreturn__))
63#else
64#define NORETURN
65#ifndef __attribute__
66#define __attribute__(x)
67#endif
68#endif
69
70/* General helper functions */
71extern void usage(const char *err) NORETURN;
72extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
73extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
74extern void warn(const char *err, ...) __attribute__((format (printf, 1, 2)));
75
76extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
77extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
78extern void set_error_routine(void (*routine)(const char *err, va_list params));
79extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
80
81#ifdef NO_MMAP
82
83#ifndef PROT_READ
84#define PROT_READ 1
85#define PROT_WRITE 2
86#define MAP_PRIVATE 1
87#define MAP_FAILED ((void*)-1)
88#endif
89
90#define mmap git_mmap
91#define munmap git_munmap
92extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
93extern int git_munmap(void *start, size_t length);
94
95#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
96
97#else /* NO_MMAP */
98
99#include <sys/mman.h>
100#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
101 (sizeof(void*) >= 8 \
102 ? 1 * 1024 * 1024 * 1024 \
103 : 32 * 1024 * 1024)
104
105#endif /* NO_MMAP */
106
107#define DEFAULT_PACKED_GIT_LIMIT \
108 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
109
110#ifdef NO_SETENV
111#define setenv gitsetenv
112extern int gitsetenv(const char *, const char *, int);
113#endif
114
115#ifdef NO_UNSETENV
116#define unsetenv gitunsetenv
117extern void gitunsetenv(const char *);
118#endif
119
120#ifdef NO_STRCASESTR
121#define strcasestr gitstrcasestr
122extern char *gitstrcasestr(const char *haystack, const char *needle);
123#endif
124
125#ifdef NO_STRLCPY
126#define strlcpy gitstrlcpy
127extern size_t gitstrlcpy(char *, const char *, size_t);
128#endif
129
130extern void release_pack_memory(size_t);
131
132static inline char* xstrdup(const char *str)
133{
134 char *ret = strdup(str);
135 if (!ret) {
136 release_pack_memory(strlen(str) + 1);
137 ret = strdup(str);
138 if (!ret)
139 die("Out of memory, strdup failed");
140 }
141 return ret;
142}
143
144static inline void *xmalloc(size_t size)
145{
146 void *ret = malloc(size);
147 if (!ret && !size)
148 ret = malloc(1);
149 if (!ret) {
150 release_pack_memory(size);
151 ret = malloc(size);
152 if (!ret && !size)
153 ret = malloc(1);
154 if (!ret)
155 die("Out of memory, malloc failed");
156 }
157#ifdef XMALLOC_POISON
158 memset(ret, 0xA5, size);
159#endif
160 return ret;
161}
162
163static inline void *xrealloc(void *ptr, size_t size)
164{
165 void *ret = realloc(ptr, size);
166 if (!ret && !size)
167 ret = realloc(ptr, 1);
168 if (!ret) {
169 release_pack_memory(size);
170 ret = realloc(ptr, size);
171 if (!ret && !size)
172 ret = realloc(ptr, 1);
173 if (!ret)
174 die("Out of memory, realloc failed");
175 }
176 return ret;
177}
178
179static inline void *xcalloc(size_t nmemb, size_t size)
180{
181 void *ret = calloc(nmemb, size);
182 if (!ret && (!nmemb || !size))
183 ret = calloc(1, 1);
184 if (!ret) {
185 release_pack_memory(nmemb * size);
186 ret = calloc(nmemb, size);
187 if (!ret && (!nmemb || !size))
188 ret = calloc(1, 1);
189 if (!ret)
190 die("Out of memory, calloc failed");
191 }
192 return ret;
193}
194
195static inline void *xmmap(void *start, size_t length,
196 int prot, int flags, int fd, off_t offset)
197{
198 void *ret = mmap(start, length, prot, flags, fd, offset);
199 if (ret == MAP_FAILED) {
200 release_pack_memory(length);
201 ret = mmap(start, length, prot, flags, fd, offset);
202 if (ret == MAP_FAILED)
203 die("Out of memory? mmap failed: %s", strerror(errno));
204 }
205 return ret;
206}
207
208static inline ssize_t xread(int fd, void *buf, size_t len)
209{
210 ssize_t nr;
211 while (1) {
212 nr = read(fd, buf, len);
213 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
214 continue;
215 return nr;
216 }
217}
218
219static inline ssize_t xwrite(int fd, const void *buf, size_t len)
220{
221 ssize_t nr;
222 while (1) {
223 nr = write(fd, buf, len);
224 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
225 continue;
226 return nr;
227 }
228}
229
230static inline int has_extension(const char *filename, const char *ext)
231{
232 size_t len = strlen(filename);
233 size_t extlen = strlen(ext);
234 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
235}
236
237/* Sane ctype - no locale, and works with signed chars */
238#undef isspace
239#undef isdigit
240#undef isalpha
241#undef isalnum
242#undef tolower
243#undef toupper
244extern unsigned char sane_ctype[256];
245#define GIT_SPACE 0x01
246#define GIT_DIGIT 0x02
247#define GIT_ALPHA 0x04
248#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
249#define isspace(x) sane_istest(x,GIT_SPACE)
250#define isdigit(x) sane_istest(x,GIT_DIGIT)
251#define isalpha(x) sane_istest(x,GIT_ALPHA)
252#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
253#define tolower(x) sane_case((unsigned char)(x), 0x20)
254#define toupper(x) sane_case((unsigned char)(x), 0)
255
256static inline int sane_case(int x, int high)
257{
258 if (sane_istest(x, GIT_ALPHA))
259 x = (x & ~0x20) | high;
260 return x;
261}
262
263#endif