| 1 | /* |
| 2 | * Copyright (c) Artem Bityutskiy, 2007, 2008 |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 12 | * the GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 17 | */ |
| 18 | |
| 19 | /* Imported from mtd-utils by dehrenberg */ |
| 20 | |
| 21 | #ifndef __MTD_UTILS_COMMON_H__ |
| 22 | #define __MTD_UTILS_COMMON_H__ |
| 23 | |
| 24 | #include <stdbool.h> |
| 25 | #include <stdio.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <ctype.h> |
| 28 | #include <string.h> |
| 29 | #include <fcntl.h> |
| 30 | #include <errno.h> |
| 31 | #include <features.h> |
| 32 | #include <inttypes.h> |
| 33 | |
| 34 | #ifndef PROGRAM_NAME |
| 35 | # error "You must define PROGRAM_NAME before including this header" |
| 36 | #endif |
| 37 | |
| 38 | #ifdef __cplusplus |
| 39 | extern "C" { |
| 40 | #endif |
| 41 | |
| 42 | #ifndef MIN /* some C lib headers define this for us */ |
| 43 | #define MIN(a, b) ((a) < (b) ? (a) : (b)) |
| 44 | #endif |
| 45 | #ifndef MAX |
| 46 | #define MAX(a, b) ((a) > (b) ? (a) : (b)) |
| 47 | #endif |
| 48 | #define min(a, b) MIN(a, b) /* glue for linux kernel source */ |
| 49 | #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) |
| 50 | |
| 51 | #define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1) |
| 52 | #define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask)) |
| 53 | |
| 54 | #define min_t(t,x,y) ({ \ |
| 55 | typeof((x)) _x = (x); \ |
| 56 | typeof((y)) _y = (y); \ |
| 57 | (_x < _y) ? _x : _y; \ |
| 58 | }) |
| 59 | |
| 60 | #define max_t(t,x,y) ({ \ |
| 61 | typeof((x)) _x = (x); \ |
| 62 | typeof((y)) _y = (y); \ |
| 63 | (_x > _y) ? _x : _y; \ |
| 64 | }) |
| 65 | |
| 66 | #ifndef O_CLOEXEC |
| 67 | #define O_CLOEXEC 0 |
| 68 | #endif |
| 69 | |
| 70 | /* define a print format specifier for off_t */ |
| 71 | #ifdef __USE_FILE_OFFSET64 |
| 72 | #define PRIxoff_t PRIx64 |
| 73 | #define PRIdoff_t PRId64 |
| 74 | #else |
| 75 | #define PRIxoff_t "l"PRIx32 |
| 76 | #define PRIdoff_t "l"PRId32 |
| 77 | #endif |
| 78 | |
| 79 | /* Verbose messages */ |
| 80 | #define bareverbose(verbose, fmt, ...) do { \ |
| 81 | if (verbose) \ |
| 82 | printf(fmt, ##__VA_ARGS__); \ |
| 83 | } while(0) |
| 84 | #define verbose(verbose, fmt, ...) \ |
| 85 | bareverbose(verbose, "%s: " fmt "\n", PROGRAM_NAME, ##__VA_ARGS__) |
| 86 | |
| 87 | /* Normal messages */ |
| 88 | #define normsg_cont(fmt, ...) do { \ |
| 89 | printf("%s: " fmt, PROGRAM_NAME, ##__VA_ARGS__); \ |
| 90 | } while(0) |
| 91 | #define normsg(fmt, ...) do { \ |
| 92 | normsg_cont(fmt "\n", ##__VA_ARGS__); \ |
| 93 | } while(0) |
| 94 | |
| 95 | /* Error messages */ |
| 96 | #define errmsg(fmt, ...) ({ \ |
| 97 | fprintf(stderr, "%s: error!: " fmt "\n", PROGRAM_NAME, ##__VA_ARGS__); \ |
| 98 | -1; \ |
| 99 | }) |
| 100 | #define errmsg_die(fmt, ...) do { \ |
| 101 | exit(errmsg(fmt, ##__VA_ARGS__)); \ |
| 102 | } while(0) |
| 103 | |
| 104 | /* System error messages */ |
| 105 | #define sys_errmsg(fmt, ...) ({ \ |
| 106 | int _err = errno; \ |
| 107 | errmsg(fmt, ##__VA_ARGS__); \ |
| 108 | fprintf(stderr, "%*serror %d (%s)\n", (int)sizeof(PROGRAM_NAME) + 1,\ |
| 109 | "", _err, strerror(_err)); \ |
| 110 | -1; \ |
| 111 | }) |
| 112 | #define sys_errmsg_die(fmt, ...) do { \ |
| 113 | exit(sys_errmsg(fmt, ##__VA_ARGS__)); \ |
| 114 | } while(0) |
| 115 | |
| 116 | /* Warnings */ |
| 117 | #define warnmsg(fmt, ...) do { \ |
| 118 | fprintf(stderr, "%s: warning!: " fmt "\n", PROGRAM_NAME, ##__VA_ARGS__); \ |
| 119 | } while(0) |
| 120 | |
| 121 | #if defined(__UCLIBC__) |
| 122 | /* uClibc versions before 0.9.34 don't have rpmatch() */ |
| 123 | #if __UCLIBC_MAJOR__ == 0 && \ |
| 124 | (__UCLIBC_MINOR__ < 9 || \ |
| 125 | (__UCLIBC_MINOR__ == 9 && __UCLIBC_SUBLEVEL__ < 34)) |
| 126 | #undef rpmatch |
| 127 | #define rpmatch __rpmatch |
| 128 | static inline int __rpmatch(const char *resp) |
| 129 | { |
| 130 | return (resp[0] == 'y' || resp[0] == 'Y') ? 1 : |
| 131 | (resp[0] == 'n' || resp[0] == 'N') ? 0 : -1; |
| 132 | } |
| 133 | #endif |
| 134 | #endif |
| 135 | |
| 136 | /** |
| 137 | * prompt the user for confirmation |
| 138 | */ |
| 139 | static inline bool prompt(const char *msg, bool def) |
| 140 | { |
| 141 | char *line = NULL; |
| 142 | size_t len; |
| 143 | bool ret = def; |
| 144 | |
| 145 | do { |
| 146 | normsg_cont("%s (%c/%c) ", msg, def ? 'Y' : 'y', def ? 'n' : 'N'); |
| 147 | fflush(stdout); |
| 148 | |
| 149 | while (getline(&line, &len, stdin) == -1) { |
| 150 | printf("failed to read prompt; assuming '%s'\n", |
| 151 | def ? "yes" : "no"); |
| 152 | break; |
| 153 | } |
| 154 | |
| 155 | if (strcmp("\n", line) != 0) { |
| 156 | switch (rpmatch(line)) { |
| 157 | case 0: ret = false; break; |
| 158 | case 1: ret = true; break; |
| 159 | case -1: |
| 160 | puts("unknown response; please try again"); |
| 161 | continue; |
| 162 | } |
| 163 | } |
| 164 | break; |
| 165 | } while (1); |
| 166 | |
| 167 | free(line); |
| 168 | |
| 169 | return ret; |
| 170 | } |
| 171 | |
| 172 | static inline int is_power_of_2(unsigned long long n) |
| 173 | { |
| 174 | return (n != 0 && ((n & (n - 1)) == 0)); |
| 175 | } |
| 176 | |
| 177 | /** |
| 178 | * simple_strtoX - convert a hex/dec/oct string into a number |
| 179 | * @snum: buffer to convert |
| 180 | * @error: set to 1 when buffer isn't fully consumed |
| 181 | * |
| 182 | * These functions are similar to the standard strtoX() functions, but they are |
| 183 | * a little bit easier to use if you want to convert full string of digits into |
| 184 | * the binary form. The typical usage: |
| 185 | * |
| 186 | * int error = 0; |
| 187 | * unsigned long num; |
| 188 | * |
| 189 | * num = simple_strtoul(str, &error); |
| 190 | * if (error || ... if needed, your check that num is not out of range ...) |
| 191 | * error_happened(); |
| 192 | */ |
| 193 | #define simple_strtoX(func, type) \ |
| 194 | static inline type simple_##func(const char *snum, int *error) \ |
| 195 | { \ |
| 196 | char *endptr; \ |
| 197 | type ret = func(snum, &endptr, 0); \ |
| 198 | \ |
| 199 | if (error && (!*snum || *endptr)) { \ |
| 200 | errmsg("%s: unable to parse the number '%s'", #func, snum); \ |
| 201 | *error = 1; \ |
| 202 | } \ |
| 203 | \ |
| 204 | return ret; \ |
| 205 | } |
| 206 | simple_strtoX(strtol, long int) |
| 207 | simple_strtoX(strtoll, long long int) |
| 208 | simple_strtoX(strtoul, unsigned long int) |
| 209 | simple_strtoX(strtoull, unsigned long long int) |
| 210 | |
| 211 | /* Simple version-printing for utils */ |
| 212 | #define common_print_version() \ |
| 213 | do { \ |
| 214 | printf("%s %s\n", PROGRAM_NAME, VERSION); \ |
| 215 | } while (0) |
| 216 | |
| 217 | #include "libmtd_xalloc.h" |
| 218 | |
| 219 | #ifdef __cplusplus |
| 220 | } |
| 221 | #endif |
| 222 | |
| 223 | #endif /* !__MTD_UTILS_COMMON_H__ */ |