| 1 | #include "git-compat-util.h" |
| 2 | #include "gettext.h" |
| 3 | #include "parse.h" |
| 4 | |
| 5 | static uintmax_t get_unit_factor(const char *end) |
| 6 | { |
| 7 | if (!*end) |
| 8 | return 1; |
| 9 | else if (!strcasecmp(end, "k")) |
| 10 | return 1024; |
| 11 | else if (!strcasecmp(end, "m")) |
| 12 | return 1024 * 1024; |
| 13 | else if (!strcasecmp(end, "g")) |
| 14 | return 1024 * 1024 * 1024; |
| 15 | return 0; |
| 16 | } |
| 17 | |
| 18 | int git_parse_signed(const char *value, intmax_t *ret, intmax_t max) |
| 19 | { |
| 20 | if (value && *value) { |
| 21 | char *end; |
| 22 | intmax_t val; |
| 23 | intmax_t factor; |
| 24 | |
| 25 | if (max < 0) |
| 26 | BUG("max must be a positive integer"); |
| 27 | |
| 28 | errno = 0; |
| 29 | val = strtoimax(value, &end, 0); |
| 30 | if (errno == ERANGE) |
| 31 | return 0; |
| 32 | if (end == value) { |
| 33 | errno = EINVAL; |
| 34 | return 0; |
| 35 | } |
| 36 | factor = get_unit_factor(end); |
| 37 | if (!factor) { |
| 38 | errno = EINVAL; |
| 39 | return 0; |
| 40 | } |
| 41 | if ((val < 0 && (-max - 1) / factor > val) || |
| 42 | (val > 0 && max / factor < val)) { |
| 43 | errno = ERANGE; |
| 44 | return 0; |
| 45 | } |
| 46 | val *= factor; |
| 47 | *ret = val; |
| 48 | return 1; |
| 49 | } |
| 50 | errno = EINVAL; |
| 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max) |
| 55 | { |
| 56 | if (value && *value) { |
| 57 | char *end; |
| 58 | uintmax_t val; |
| 59 | uintmax_t factor; |
| 60 | |
| 61 | /* negative values would be accepted by strtoumax */ |
| 62 | if (strchr(value, '-')) { |
| 63 | errno = EINVAL; |
| 64 | return 0; |
| 65 | } |
| 66 | errno = 0; |
| 67 | val = strtoumax(value, &end, 0); |
| 68 | if (errno == ERANGE) |
| 69 | return 0; |
| 70 | if (end == value) { |
| 71 | errno = EINVAL; |
| 72 | return 0; |
| 73 | } |
| 74 | factor = get_unit_factor(end); |
| 75 | if (!factor) { |
| 76 | errno = EINVAL; |
| 77 | return 0; |
| 78 | } |
| 79 | if (unsigned_mult_overflows(factor, val) || |
| 80 | factor * val > max) { |
| 81 | errno = ERANGE; |
| 82 | return 0; |
| 83 | } |
| 84 | val *= factor; |
| 85 | *ret = val; |
| 86 | return 1; |
| 87 | } |
| 88 | errno = EINVAL; |
| 89 | return 0; |
| 90 | } |
| 91 | |
| 92 | int git_parse_int(const char *value, int *ret) |
| 93 | { |
| 94 | intmax_t tmp; |
| 95 | if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int))) |
| 96 | return 0; |
| 97 | *ret = tmp; |
| 98 | return 1; |
| 99 | } |
| 100 | |
| 101 | int git_parse_int64(const char *value, int64_t *ret) |
| 102 | { |
| 103 | intmax_t tmp; |
| 104 | if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t))) |
| 105 | return 0; |
| 106 | *ret = tmp; |
| 107 | return 1; |
| 108 | } |
| 109 | |
| 110 | int git_parse_uint(const char *value, unsigned int *ret) |
| 111 | { |
| 112 | uintmax_t tmp; |
| 113 | if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(unsigned int))) |
| 114 | return 0; |
| 115 | *ret = tmp; |
| 116 | return 1; |
| 117 | } |
| 118 | |
| 119 | int git_parse_ulong(const char *value, unsigned long *ret) |
| 120 | { |
| 121 | uintmax_t tmp; |
| 122 | if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long))) |
| 123 | return 0; |
| 124 | *ret = tmp; |
| 125 | return 1; |
| 126 | } |
| 127 | |
| 128 | int git_parse_ssize_t(const char *value, ssize_t *ret) |
| 129 | { |
| 130 | intmax_t tmp; |
| 131 | if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t))) |
| 132 | return 0; |
| 133 | *ret = tmp; |
| 134 | return 1; |
| 135 | } |
| 136 | |
| 137 | int git_parse_double(const char *value, double *ret) |
| 138 | { |
| 139 | char *end; |
| 140 | double val; |
| 141 | uintmax_t factor; |
| 142 | |
| 143 | if (!value || !*value) { |
| 144 | errno = EINVAL; |
| 145 | return 0; |
| 146 | } |
| 147 | |
| 148 | errno = 0; |
| 149 | val = strtod(value, &end); |
| 150 | if (errno == ERANGE) |
| 151 | return 0; |
| 152 | if (end == value) { |
| 153 | errno = EINVAL; |
| 154 | return 0; |
| 155 | } |
| 156 | factor = get_unit_factor(end); |
| 157 | if (!factor) { |
| 158 | errno = EINVAL; |
| 159 | return 0; |
| 160 | } |
| 161 | val *= factor; |
| 162 | *ret = val; |
| 163 | return 1; |
| 164 | } |
| 165 | |
| 166 | int git_parse_maybe_bool_text(const char *value) |
| 167 | { |
| 168 | if (!value) |
| 169 | return 1; |
| 170 | if (!*value) |
| 171 | return 0; |
| 172 | if (!strcasecmp(value, "true") |
| 173 | || !strcasecmp(value, "yes") |
| 174 | || !strcasecmp(value, "on")) |
| 175 | return 1; |
| 176 | if (!strcasecmp(value, "false") |
| 177 | || !strcasecmp(value, "no") |
| 178 | || !strcasecmp(value, "off")) |
| 179 | return 0; |
| 180 | return -1; |
| 181 | } |
| 182 | |
| 183 | int git_parse_maybe_bool(const char *value) |
| 184 | { |
| 185 | int v = git_parse_maybe_bool_text(value); |
| 186 | if (0 <= v) |
| 187 | return v; |
| 188 | if (git_parse_int(value, &v)) |
| 189 | return !!v; |
| 190 | return -1; |
| 191 | } |
| 192 | |
| 193 | /* |
| 194 | * Parse environment variable 'k' as a boolean (in various |
| 195 | * possible spellings); if missing, use the default value 'def'. |
| 196 | */ |
| 197 | int git_env_bool(const char *k, int def) |
| 198 | { |
| 199 | const char *v = getenv(k); |
| 200 | int val; |
| 201 | if (!v) |
| 202 | return def; |
| 203 | val = git_parse_maybe_bool(v); |
| 204 | if (val < 0) |
| 205 | die(_("bad boolean environment value '%s' for '%s'"), |
| 206 | v, k); |
| 207 | return val; |
| 208 | } |
| 209 | |
| 210 | /* |
| 211 | * Parse environment variable 'k' as ulong with possibly a unit |
| 212 | * suffix; if missing, use the default value 'val'. |
| 213 | */ |
| 214 | unsigned long git_env_ulong(const char *k, unsigned long val) |
| 215 | { |
| 216 | const char *v = getenv(k); |
| 217 | if (v && !git_parse_ulong(v, &val)) |
| 218 | die(_("failed to parse %s"), k); |
| 219 | return val; |
| 220 | } |