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152 lines
3.2 KiB
152 lines
3.2 KiB
#ifndef GIT_COMPAT_UTIL_H |
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#define GIT_COMPAT_UTIL_H |
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#ifndef FLEX_ARRAY |
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#if defined(__GNUC__) && (__GNUC__ < 3) |
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#define FLEX_ARRAY 0 |
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#else |
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#define FLEX_ARRAY /* empty */ |
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#endif |
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#endif |
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#include <unistd.h> |
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#include <stdio.h> |
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#include <sys/stat.h> |
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#include <fcntl.h> |
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#include <stddef.h> |
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#include <stdlib.h> |
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#include <stdarg.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <limits.h> |
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#include <sys/param.h> |
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#include <netinet/in.h> |
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#include <sys/types.h> |
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#include <dirent.h> |
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#ifdef __GNUC__ |
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#define NORETURN __attribute__((__noreturn__)) |
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#else |
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#define NORETURN |
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#ifndef __attribute__ |
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#define __attribute__(x) |
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#endif |
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#endif |
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/* General helper functions */ |
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extern void usage(const char *err) NORETURN; |
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extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2))); |
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extern int error(const char *err, ...) __attribute__((format (printf, 1, 2))); |
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#ifdef NO_MMAP |
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#ifndef PROT_READ |
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#define PROT_READ 1 |
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#define PROT_WRITE 2 |
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#define MAP_PRIVATE 1 |
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#define MAP_FAILED ((void*)-1) |
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#endif |
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#define mmap gitfakemmap |
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#define munmap gitfakemunmap |
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extern void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset); |
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extern int gitfakemunmap(void *start, size_t length); |
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#else /* NO_MMAP */ |
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#include <sys/mman.h> |
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#endif /* NO_MMAP */ |
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#ifdef NO_SETENV |
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#define setenv gitsetenv |
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extern int gitsetenv(const char *, const char *, int); |
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#endif |
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#ifdef NO_STRCASESTR |
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#define strcasestr gitstrcasestr |
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extern char *gitstrcasestr(const char *haystack, const char *needle); |
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#endif |
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static inline void *xmalloc(size_t size) |
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{ |
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void *ret = malloc(size); |
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if (!ret && !size) |
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ret = malloc(1); |
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if (!ret) |
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die("Out of memory, malloc failed"); |
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return ret; |
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} |
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static inline void *xrealloc(void *ptr, size_t size) |
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{ |
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void *ret = realloc(ptr, size); |
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if (!ret && !size) |
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ret = realloc(ptr, 1); |
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if (!ret) |
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die("Out of memory, realloc failed"); |
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return ret; |
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} |
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static inline void *xcalloc(size_t nmemb, size_t size) |
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{ |
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void *ret = calloc(nmemb, size); |
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if (!ret && (!nmemb || !size)) |
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ret = calloc(1, 1); |
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if (!ret) |
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die("Out of memory, calloc failed"); |
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return ret; |
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} |
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static inline ssize_t xread(int fd, void *buf, size_t len) |
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{ |
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ssize_t nr; |
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while (1) { |
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nr = read(fd, buf, len); |
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if ((nr < 0) && (errno == EAGAIN || errno == EINTR)) |
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continue; |
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return nr; |
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} |
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} |
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static inline ssize_t xwrite(int fd, const void *buf, size_t len) |
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{ |
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ssize_t nr; |
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while (1) { |
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nr = write(fd, buf, len); |
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if ((nr < 0) && (errno == EAGAIN || errno == EINTR)) |
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continue; |
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return nr; |
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} |
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} |
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/* Sane ctype - no locale, and works with signed chars */ |
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#undef isspace |
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#undef isdigit |
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#undef isalpha |
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#undef isalnum |
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#undef tolower |
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#undef toupper |
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extern unsigned char sane_ctype[256]; |
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#define GIT_SPACE 0x01 |
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#define GIT_DIGIT 0x02 |
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#define GIT_ALPHA 0x04 |
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#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) |
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#define isspace(x) sane_istest(x,GIT_SPACE) |
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#define isdigit(x) sane_istest(x,GIT_DIGIT) |
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#define isalpha(x) sane_istest(x,GIT_ALPHA) |
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#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) |
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#define tolower(x) sane_case((unsigned char)(x), 0x20) |
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#define toupper(x) sane_case((unsigned char)(x), 0) |
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static inline int sane_case(int x, int high) |
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{ |
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if (sane_istest(x, GIT_ALPHA)) |
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x = (x & ~0x20) | high; |
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return x; |
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} |
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#ifndef MAXPATHLEN |
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#define MAXPATHLEN 256 |
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#endif |
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#endif
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