diff options
Diffstat (limited to 'git-compat-util.h')
| -rw-r--r-- | git-compat-util.h | 70 |
1 files changed, 58 insertions, 12 deletions
diff --git a/git-compat-util.h b/git-compat-util.h index f5b5d2e714..d89a78616b 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -436,6 +436,7 @@ static inline int const_error(void) return -1; } #define error(...) (error(__VA_ARGS__), const_error()) +#define error_errno(...) (error_errno(__VA_ARGS__), const_error()) #endif extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params)); @@ -474,6 +475,23 @@ static inline int skip_prefix(const char *str, const char *prefix, } /* + * Like skip_prefix, but promises never to read past "len" bytes of the input + * buffer, and returns the remaining number of bytes in "out" via "outlen". + */ +static inline int skip_prefix_mem(const char *buf, size_t len, + const char *prefix, + const char **out, size_t *outlen) +{ + size_t prefix_len = strlen(prefix); + if (prefix_len <= len && !memcmp(buf, prefix, prefix_len)) { + *out = buf + prefix_len; + *outlen = len - prefix_len; + return 1; + } + return 0; +} + +/* * If buf ends with suffix, return 1 and subtract the length of the suffix * from *len. Otherwise, return 0 and leave *len untouched. */ @@ -646,10 +664,22 @@ void *gitmemmem(const void *haystack, size_t haystacklen, const void *needle, size_t needlelen); #endif +#ifdef OVERRIDE_STRDUP +#ifdef strdup +#undef strdup +#endif +#define strdup gitstrdup +char *gitstrdup(const char *s); +#endif + #ifdef NO_GETPAGESIZE #define getpagesize() sysconf(_SC_PAGESIZE) #endif +#ifndef O_CLOEXEC +#define O_CLOEXEC 0 +#endif + #ifdef FREAD_READS_DIRECTORIES #ifdef fopen #undef fopen @@ -768,6 +798,14 @@ extern FILE *fopen_for_writing(const char *path); #define ALLOC_ARRAY(x, alloc) (x) = xmalloc(st_mult(sizeof(*(x)), (alloc))) #define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), st_mult(sizeof(*(x)), (alloc))) +#define COPY_ARRAY(dst, src, n) copy_array((dst), (src), (n), sizeof(*(dst)) + \ + BUILD_ASSERT_OR_ZERO(sizeof(*(dst)) == sizeof(*(src)))) +static inline void copy_array(void *dst, const void *src, size_t n, size_t size) +{ + if (n) + memcpy(dst, src, st_mult(size, n)); +} + /* * These functions help you allocate structs with flex arrays, and copy * the data directly into the array. For example, if you had: @@ -798,7 +836,7 @@ extern FILE *fopen_for_writing(const char *path); * you can do: * * struct foo *f; - * FLEX_ALLOC_STR(f, name, src); + * FLEXPTR_ALLOC_STR(f, name, src); * * and "name" will point to a block of memory after the struct, which will be * freed along with the struct (but the pointer can be repointed anywhere). @@ -810,11 +848,14 @@ extern FILE *fopen_for_writing(const char *path); * times, and it must be assignable as an lvalue. */ #define FLEX_ALLOC_MEM(x, flexname, buf, len) do { \ - (x) = NULL; /* silence -Wuninitialized for offset calculation */ \ - (x) = xalloc_flex(sizeof(*(x)), (char *)(&((x)->flexname)) - (char *)(x), (buf), (len)); \ + size_t flex_array_len_ = (len); \ + (x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \ + memcpy((void *)(x)->flexname, (buf), flex_array_len_); \ } while (0) #define FLEXPTR_ALLOC_MEM(x, ptrname, buf, len) do { \ - (x) = xalloc_flex(sizeof(*(x)), sizeof(*(x)), (buf), (len)); \ + size_t flex_array_len_ = (len); \ + (x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \ + memcpy((x) + 1, (buf), flex_array_len_); \ (x)->ptrname = (void *)((x)+1); \ } while(0) #define FLEX_ALLOC_STR(x, flexname, str) \ @@ -822,14 +863,6 @@ extern FILE *fopen_for_writing(const char *path); #define FLEXPTR_ALLOC_STR(x, ptrname, str) \ FLEXPTR_ALLOC_MEM((x), ptrname, (str), strlen(str)) -static inline void *xalloc_flex(size_t base_len, size_t offset, - const void *src, size_t src_len) -{ - unsigned char *ret = xcalloc(1, st_add3(base_len, src_len, 1)); - memcpy(ret + offset, src, src_len); - return ret; -} - static inline char *xstrdup_or_null(const char *str) { return str ? xstrdup(str) : NULL; @@ -944,6 +977,19 @@ void git_qsort(void *base, size_t nmemb, size_t size, #define qsort git_qsort #endif +#ifndef REG_STARTEND +#error "Git requires REG_STARTEND support. Compile with NO_REGEX=NeedsStartEnd" +#endif + +static inline int regexec_buf(const regex_t *preg, const char *buf, size_t size, + size_t nmatch, regmatch_t pmatch[], int eflags) +{ + assert(nmatch > 0 && pmatch); + pmatch[0].rm_so = 0; + pmatch[0].rm_eo = size; + return regexec(preg, buf, nmatch, pmatch, eflags | REG_STARTEND); +} + #ifndef DIR_HAS_BSD_GROUP_SEMANTICS # define FORCE_DIR_SET_GID S_ISGID #else |