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1 #ifndef GIT_COMPAT_UTIL_H

2 #define GIT_COMPAT_UTIL_H

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

12 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))

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>

29 #ifdef __GNUC__

30 #define NORETURN __attribute__((__noreturn__))

31 #else

32 #define NORETURN

33 #ifndef __attribute__

34 #define __attribute__(x)

35 #endif

36 #endif

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));

47 #ifdef NO_MMAP

49 #ifndef PROT_READ

50 #define PROT_READ 1

51 #define PROT_WRITE 2

52 #define MAP_PRIVATE 1

53 #define MAP_FAILED ((void*)-1)

54 #endif

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);

61 #else /* NO_MMAP */

63 #include <sys/mman.h>

65 #endif /* NO_MMAP */

67 #ifdef NO_SETENV

68 #define setenv gitsetenv

69 extern int gitsetenv(const char *, const char *, int);

70 #endif

72 #ifdef NO_UNSETENV

73 #define unsetenv gitunsetenv

74 extern void gitunsetenv(const char *);

75 #endif

77 #ifdef NO_STRCASESTR

78 #define strcasestr gitstrcasestr

79 extern char *gitstrcasestr(const char *haystack, const char *needle);

80 #endif

82 #ifdef NO_STRLCPY

83 #define strlcpy gitstrlcpy

84 extern size_t gitstrlcpy(char *, const char *, size_t);

85 #endif

87 static inline void *xmalloc(size_t size)

88 {

89 void *ret = malloc(size);

90 if (!ret && !size)

91 ret = malloc(1);

92 if (!ret)

93 die("Out of memory, malloc failed");

94 #ifdef XMALLOC_POISON

95 memset(ret, 0xA5, size);

96 #endif

97 return ret;

98 }

100 static inline void *xrealloc(void *ptr, size_t size)

101 {

102 void *ret = realloc(ptr, size);

103 if (!ret && !size)

104 ret = realloc(ptr, 1);

105 if (!ret)

106 die("Out of memory, realloc failed");

107 return ret;

108 }

109

110 static inline void *xcalloc(size_t nmemb, size_t size)

111 {

112 void *ret = calloc(nmemb, size);

113 if (!ret && (!nmemb || !size))

114 ret = calloc(1, 1);

115 if (!ret)

116 die("Out of memory, calloc failed");

117 return ret;

118 }

119

120 static inline ssize_t xread(int fd, void *buf, size_t len)

121 {

122 ssize_t nr;

123 while (1) {

124 nr = read(fd, buf, len);

125 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))

126 continue;

127 return nr;

128 }

129 }

130

131 static inline ssize_t xwrite(int fd, const void *buf, size_t len)

132 {

133 ssize_t nr;

134 while (1) {

135 nr = write(fd, buf, len);

136 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))

137 continue;

138 return nr;

139 }

140 }

141

142 static inline int has_extension(const char *filename, const char *ext)

143 {

144 size_t len = strlen(filename);

145 size_t extlen = strlen(ext);

146 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);

147 }

148

149 /* Sane ctype - no locale, and works with signed chars */

150 #undef isspace

151 #undef isdigit

152 #undef isalpha

153 #undef isalnum

154 #undef tolower

155 #undef toupper

156 extern unsigned char sane_ctype[256];

157 #define GIT_SPACE 0x01

158 #define GIT_DIGIT 0x02

159 #define GIT_ALPHA 0x04

160 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)

161 #define isspace(x) sane_istest(x,GIT_SPACE)

162 #define isdigit(x) sane_istest(x,GIT_DIGIT)

163 #define isalpha(x) sane_istest(x,GIT_ALPHA)

164 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)

165 #define tolower(x) sane_case((unsigned char)(x), 0x20)

166 #define toupper(x) sane_case((unsigned char)(x), 0)

167

168 static inline int sane_case(int x, int high)

169 {

170 if (sane_istest(x, GIT_ALPHA))

171 x = (x & ~0x20) | high;

172 return x;

173 }

174

175 #ifndef MAXPATHLEN

176 #define MAXPATHLEN 256

177 #endif

178 #endif