projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1843b4e0 JP |
1 | #ifndef __SUBCMD_UTIL_H |
| 2 | #define __SUBCMD_UTIL_H | |
| 901421a5 | 3 | |
| 2f4ce5ec JP |
4 | #include <stdarg.h> |
| 5 | #include <stdlib.h> | |
| 901421a5 JP |
6 | #include <stdio.h> |
| 7 | ||
| 2f4ce5ec JP |
8 | #define NORETURN __attribute__((__noreturn__)) |
| 9 | ||
| 10 | static inline void report(const char *prefix, const char *err, va_list params) | |
| 11 | { | |
| 12 | char msg[1024]; | |
| 13 | vsnprintf(msg, sizeof(msg), err, params); | |
| 14 | fprintf(stderr, " %s%s\n", prefix, msg); | |
| 15 | } | |
| 16 | ||
| 17 | static NORETURN inline void die(const char *err, ...) | |
| 18 | { | |
| 19 | va_list params; | |
| 20 | ||
| 21 | va_start(params, err); | |
| 22 | report(" Fatal: ", err, params); | |
| 23 | exit(128); | |
| 24 | va_end(params); | |
| 25 | } | |
| 26 | ||
| 27 | #define zfree(ptr) ({ free(*ptr); *ptr = NULL; }) | |
| 28 | ||
| 29 | #define alloc_nr(x) (((x)+16)*3/2) | |
| 30 | ||
| 31 | /* | |
| 32 | * Realloc the buffer pointed at by variable 'x' so that it can hold | |
| 33 | * at least 'nr' entries; the number of entries currently allocated | |
| 34 | * is 'alloc', using the standard growing factor alloc_nr() macro. | |
| 35 | * | |
| 36 | * DO NOT USE any expression with side-effect for 'x' or 'alloc'. | |
| 37 | */ | |
| 38 | #define ALLOC_GROW(x, nr, alloc) \ | |
| 39 | do { \ | |
| 40 | if ((nr) > alloc) { \ | |
| 41 | if (alloc_nr(alloc) < (nr)) \ | |
| 42 | alloc = (nr); \ | |
| 43 | else \ | |
| 44 | alloc = alloc_nr(alloc); \ | |
| 45 | x = xrealloc((x), alloc * sizeof(*(x))); \ | |
| 46 | } \ | |
| 47 | } while(0) | |
| 48 | ||
| 49 | static inline void *xrealloc(void *ptr, size_t size) | |
| 50 | { | |
| 51 | void *ret = realloc(ptr, size); | |
| 52 | if (!ret && !size) | |
| 53 | ret = realloc(ptr, 1); | |
| 54 | if (!ret) { | |
| 55 | ret = realloc(ptr, size); | |
| 56 | if (!ret && !size) | |
| 57 | ret = realloc(ptr, 1); | |
| 58 | if (!ret) | |
| 59 | die("Out of memory, realloc failed"); | |
| 60 | } | |
| 61 | return ret; | |
| 62 | } | |
| 63 | ||
| 901421a5 JP |
64 | #define astrcatf(out, fmt, ...) \ |
| 65 | ({ \ | |
| 66 | char *tmp = *(out); \ | |
| 67 | if (asprintf((out), "%s" fmt, tmp ?: "", ## __VA_ARGS__) == -1) \ | |
| 68 | die("asprintf failed"); \ | |
| 69 | free(tmp); \ | |
| 70 | }) | |
| 71 | ||
| 72 | static inline void astrcat(char **out, const char *add) | |
| 73 | { | |
| 74 | char *tmp = *out; | |
| 75 | ||
| 76 | if (asprintf(out, "%s%s", tmp ?: "", add) == -1) | |
| 77 | die("asprintf failed"); | |
| 78 | ||
| 79 | free(tmp); | |
| 80 | } | |
| 81 | ||
| 2f4ce5ec JP |
82 | static inline int prefixcmp(const char *str, const char *prefix) |
| 83 | { | |
| 84 | for (; ; str++, prefix++) | |
| 85 | if (!*prefix) | |
| 86 | return 0; | |
| 87 | else if (*str != *prefix) | |
| 88 | return (unsigned char)*prefix - (unsigned char)*str; | |
| 89 | } | |
| 90 | ||
| 1843b4e0 | 91 | #endif /* __SUBCMD_UTIL_H */ |