1 #ifndef GIT_COMPAT_UTIL_H
2 #define GIT_COMPAT_UTIL_H
5 #if defined(__GNUC__) && (__GNUC__ < 3)
8 #define FLEX_ARRAY /* empty */
12 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
24 #include <sys/param.h>
25 #include <netinet/in.h>
26 #include <sys/types.h>
30 #define NORETURN __attribute__((__noreturn__))
34 #define __attribute__(x)
38 /* General helper functions */
39 extern void usage(const char *err) NORETURN;
40 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
41 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
43 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
44 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
45 extern void set_error_routine(void (*routine)(const char *err, va_list params));
53 #define MAP_FAILED ((void*)-1)
56 #define mmap gitfakemmap
57 #define munmap gitfakemunmap
58 extern void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset);
59 extern int gitfakemunmap(void *start, size_t length);
68 #define setenv gitsetenv
69 extern int gitsetenv(const char *, const char *, int);
73 #define unsetenv gitunsetenv
74 extern void gitunsetenv(const char *);
78 #define strcasestr gitstrcasestr
79 extern char *gitstrcasestr(const char *haystack, const char *needle);
83 #define strlcpy gitstrlcpy
84 extern size_t gitstrlcpy(char *, const char *, size_t);
87 static inline char* xstrdup(const char *str)
89 char *ret = strdup(str);
91 die("Out of memory, strdup failed");
95 static inline void *xmalloc(size_t size)
97 void *ret = malloc(size);
101 die("Out of memory, malloc failed");
102 #ifdef XMALLOC_POISON
103 memset(ret, 0xA5, size);
108 static inline void *xrealloc(void *ptr, size_t size)
110 void *ret = realloc(ptr, size);
112 ret = realloc(ptr, 1);
114 die("Out of memory, realloc failed");
118 static inline void *xcalloc(size_t nmemb, size_t size)
120 void *ret = calloc(nmemb, size);
121 if (!ret && (!nmemb || !size))
124 die("Out of memory, calloc failed");
128 static inline ssize_t xread(int fd, void *buf, size_t len)
132 nr = read(fd, buf, len);
133 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
139 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
143 nr = write(fd, buf, len);
144 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
150 static inline int has_extension(const char *filename, const char *ext)
152 size_t len = strlen(filename);
153 size_t extlen = strlen(ext);
154 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
157 /* Sane ctype - no locale, and works with signed chars */
164 extern unsigned char sane_ctype[256];
165 #define GIT_SPACE 0x01
166 #define GIT_DIGIT 0x02
167 #define GIT_ALPHA 0x04
168 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
169 #define isspace(x) sane_istest(x,GIT_SPACE)
170 #define isdigit(x) sane_istest(x,GIT_DIGIT)
171 #define isalpha(x) sane_istest(x,GIT_ALPHA)
172 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
173 #define tolower(x) sane_case((unsigned char)(x), 0x20)
174 #define toupper(x) sane_case((unsigned char)(x), 0)
176 static inline int sane_case(int x, int high)
178 if (sane_istest(x, GIT_ALPHA))
179 x = (x & ~0x20) | high;