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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6099 | serge | 1 | #include <_ansi.h> |
| 2 | #include |
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| 3 | #include |
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| 4 | #include |
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| 5 | #include |
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| 6 | #include |
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| 7 | #include |
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| 8 | #include "local.h" |
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| 9 | |||
| 10 | #define sscanf siscanf /* avoid to pull in FP functions. */ |
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| 11 | |||
| 12 | static char __tzname_std[11]; |
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| 13 | static char __tzname_dst[11]; |
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| 14 | static char *prev_tzenv = NULL; |
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| 15 | |||
| 16 | _VOID |
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| 17 | _DEFUN (_tzset_unlocked_r, (reent_ptr), |
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| 18 | struct _reent *reent_ptr) |
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| 19 | { |
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| 20 | char *tzenv; |
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| 21 | unsigned short hh, mm, ss, m, w, d; |
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| 22 | int sign, n; |
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| 23 | int i, ch; |
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| 24 | __tzinfo_type *tz = __gettzinfo (); |
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| 25 | |||
| 26 | if ((tzenv = _getenv_r (reent_ptr, "TZ")) == NULL) |
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| 27 | { |
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| 28 | _timezone = 0; |
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| 29 | _daylight = 0; |
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| 30 | _tzname[0] = "GMT"; |
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| 31 | _tzname[1] = "GMT"; |
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| 32 | free(prev_tzenv); |
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| 33 | prev_tzenv = NULL; |
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| 34 | return; |
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| 35 | } |
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| 36 | |||
| 37 | if (prev_tzenv != NULL && strcmp(tzenv, prev_tzenv) == 0) |
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| 38 | return; |
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| 39 | |||
| 40 | free(prev_tzenv); |
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| 41 | prev_tzenv = _malloc_r (reent_ptr, strlen(tzenv) + 1); |
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| 42 | if (prev_tzenv != NULL) |
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| 43 | strcpy (prev_tzenv, tzenv); |
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| 44 | |||
| 45 | /* ignore implementation-specific format specifier */ |
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| 46 | if (*tzenv == ':') |
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| 47 | ++tzenv; |
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| 48 | |||
| 49 | if (sscanf (tzenv, "%10[^0-9,+-]%n", __tzname_std, &n) <= 0) |
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| 50 | return; |
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| 51 | |||
| 52 | tzenv += n; |
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| 53 | |||
| 54 | sign = 1; |
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| 55 | if (*tzenv == '-') |
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| 56 | { |
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| 57 | sign = -1; |
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| 58 | ++tzenv; |
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| 59 | } |
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| 60 | else if (*tzenv == '+') |
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| 61 | ++tzenv; |
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| 62 | |||
| 63 | mm = 0; |
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| 64 | ss = 0; |
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| 65 | |||
| 66 | if (sscanf (tzenv, "%hu%n:%hu%n:%hu%n", &hh, &n, &mm, &n, &ss, &n) < 1) |
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| 67 | return; |
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| 68 | |||
| 69 | tz->__tzrule[0].offset = sign * (ss + SECSPERMIN * mm + SECSPERHOUR * hh); |
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| 70 | _tzname[0] = __tzname_std; |
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| 71 | tzenv += n; |
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| 72 | |||
| 73 | if (sscanf (tzenv, "%10[^0-9,+-]%n", __tzname_dst, &n) <= 0) |
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| 74 | { /* No dst */ |
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| 75 | _tzname[1] = _tzname[0]; |
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| 76 | _timezone = tz->__tzrule[0].offset; |
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| 77 | _daylight = 0; |
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| 78 | return; |
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| 79 | } |
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| 80 | else |
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| 81 | _tzname[1] = __tzname_dst; |
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| 82 | |||
| 83 | tzenv += n; |
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| 84 | |||
| 85 | /* otherwise we have a dst name, look for the offset */ |
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| 86 | sign = 1; |
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| 87 | if (*tzenv == '-') |
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| 88 | { |
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| 89 | sign = -1; |
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| 90 | ++tzenv; |
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| 91 | } |
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| 92 | else if (*tzenv == '+') |
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| 93 | ++tzenv; |
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| 94 | |||
| 95 | hh = 0; |
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| 96 | mm = 0; |
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| 97 | ss = 0; |
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| 98 | |||
| 99 | n = 0; |
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| 100 | if (sscanf (tzenv, "%hu%n:%hu%n:%hu%n", &hh, &n, &mm, &n, &ss, &n) <= 0) |
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| 101 | tz->__tzrule[1].offset = tz->__tzrule[0].offset - 3600; |
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| 102 | else |
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| 103 | tz->__tzrule[1].offset = sign * (ss + SECSPERMIN * mm + SECSPERHOUR * hh); |
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| 104 | |||
| 105 | tzenv += n; |
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| 106 | |||
| 107 | for (i = 0; i < 2; ++i) |
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| 108 | { |
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| 109 | if (*tzenv == ',') |
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| 110 | ++tzenv; |
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| 111 | |||
| 112 | if (*tzenv == 'M') |
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| 113 | { |
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| 114 | if (sscanf (tzenv, "M%hu%n.%hu%n.%hu%n", &m, &n, &w, &n, &d, &n) != 3 || |
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| 115 | m < 1 || m > 12 || w < 1 || w > 5 || d > 6) |
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| 116 | return; |
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| 117 | |||
| 118 | tz->__tzrule[i].ch = 'M'; |
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| 119 | tz->__tzrule[i].m = m; |
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| 120 | tz->__tzrule[i].n = w; |
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| 121 | tz->__tzrule[i].d = d; |
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| 122 | |||
| 123 | tzenv += n; |
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| 124 | } |
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| 125 | else |
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| 126 | { |
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| 127 | char *end; |
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| 128 | if (*tzenv == 'J') |
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| 129 | { |
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| 130 | ch = 'J'; |
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| 131 | ++tzenv; |
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| 132 | } |
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| 133 | else |
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| 134 | ch = 'D'; |
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| 135 | |||
| 136 | d = strtoul (tzenv, &end, 10); |
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| 137 | |||
| 138 | /* if unspecified, default to US settings */ |
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| 139 | /* From 1987-2006, US was M4.1.0,M10.5.0, but starting in 2007 is |
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| 140 | * M3.2.0,M11.1.0 (2nd Sunday March through 1st Sunday November) */ |
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| 141 | if (end == tzenv) |
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| 142 | { |
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| 143 | if (i == 0) |
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| 144 | { |
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| 145 | tz->__tzrule[0].ch = 'M'; |
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| 146 | tz->__tzrule[0].m = 3; |
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| 147 | tz->__tzrule[0].n = 2; |
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| 148 | tz->__tzrule[0].d = 0; |
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| 149 | } |
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| 150 | else |
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| 151 | { |
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| 152 | tz->__tzrule[1].ch = 'M'; |
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| 153 | tz->__tzrule[1].m = 11; |
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| 154 | tz->__tzrule[1].n = 1; |
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| 155 | tz->__tzrule[1].d = 0; |
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| 156 | } |
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| 157 | } |
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| 158 | else |
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| 159 | { |
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| 160 | tz->__tzrule[i].ch = ch; |
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| 161 | tz->__tzrule[i].d = d; |
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| 162 | } |
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| 163 | |||
| 164 | tzenv = end; |
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| 165 | } |
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| 166 | |||
| 167 | /* default time is 02:00:00 am */ |
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| 168 | hh = 2; |
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| 169 | mm = 0; |
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| 170 | ss = 0; |
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| 171 | n = 0; |
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| 172 | |||
| 173 | if (*tzenv == '/') |
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| 174 | sscanf (tzenv, "/%hu%n:%hu%n:%hu%n", &hh, &n, &mm, &n, &ss, &n); |
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| 175 | |||
| 176 | tz->__tzrule[i].s = ss + SECSPERMIN * mm + SECSPERHOUR * hh; |
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| 177 | |||
| 178 | tzenv += n; |
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| 179 | } |
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| 180 | |||
| 181 | __tzcalc_limits (tz->__tzyear); |
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| 182 | _timezone = tz->__tzrule[0].offset; |
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| 183 | _daylight = tz->__tzrule[0].offset != tz->__tzrule[1].offset; |
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| 184 | } |
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| 185 | |||
| 186 | _VOID |
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| 187 | _DEFUN (_tzset_r, (reent_ptr), |
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| 188 | struct _reent *reent_ptr) |
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| 189 | { |
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| 190 | TZ_LOCK; |
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| 191 | _tzset_unlocked_r (reent_ptr); |
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| 192 | TZ_UNLOCK; |
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| 193 | } |