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authorMichael Drake <tlsa@netsurf-browser.org>2016-08-07 16:31:28 (GMT)
committer Michael Drake <tlsa@netsurf-browser.org>2016-08-13 12:11:48 (GMT)
commitf23405f667e7514cff93ebc83cb6d1f7ab9005c0 (patch)
tree5e8da65c73dd3ddab95a032c77664a2e56106ab0
parenta1668f6c1e0c9e88f62f6082c6206c4d33f25cce (diff)
downloadnetsurf-f23405f667e7514cff93ebc83cb6d1f7ab9005c0.tar.gz
netsurf-f23405f667e7514cff93ebc83cb6d1f7ab9005c0.tar.bz2
Time: Add date string to time_t parser.
-rw-r--r--utils/time.c813
1 files changed, 810 insertions, 3 deletions
diff --git a/utils/time.c b/utils/time.c
index 6d53b16..14f4004 100644
--- a/utils/time.c
+++ b/utils/time.c
@@ -25,17 +25,19 @@
* \brief Implementation of time operations.
*/
-#include <errno.h>
#include <stdio.h>
-#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
+#ifdef WITH_CURL
#include <curl/curl.h>
+#endif
+#include "utils/ascii.h"
#include "utils/errors.h"
#include "utils/time.h"
-
/**
* Weekdays
*
@@ -181,11 +183,814 @@ nserror nsc_snptimet(const char *str, size_t size, time_t *timep)
}
+#ifndef WITH_CURL
+
+
+/**
+ * Array of long weekday names.
+ */
+static const char * const weekdays_long[NSC_TIME_WEEKDAY__COUNT] = {
+ [NSC_TIME_WEEKDAY_SUN] = "Sunday",
+ [NSC_TIME_WEEKDAY_MON] = "Monday",
+ [NSC_TIME_WEEKDAY_TUE] = "Tuesday",
+ [NSC_TIME_WEEKDAY_WED] = "Wednesday",
+ [NSC_TIME_WEEKDAY_THU] = "Thursday",
+ [NSC_TIME_WEEKDAY_FRI] = "Friday",
+ [NSC_TIME_WEEKDAY_SAT] = "Saturday"
+};
+
+/**
+ * Timezone offsets in mins
+ *
+ * Order doesn't matter.
+ */
+enum nsc_time_zone_offsets {
+ /* Timezones */
+ NSC_TIME_ZONE_OFFSET_IDLE = -12 * 60,
+ NSC_TIME_ZONE_OFFSET_NZST = -12 * 60,
+ NSC_TIME_ZONE_OFFSET_NZT = -12 * 60,
+ NSC_TIME_ZONE_OFFSET_EAST = -10 * 60,
+ NSC_TIME_ZONE_OFFSET_GST = -10 * 60,
+ NSC_TIME_ZONE_OFFSET_JST = - 9 * 60,
+ NSC_TIME_ZONE_OFFSET_CCT = - 8 * 60,
+ NSC_TIME_ZONE_OFFSET_WAST = - 7 * 60,
+ NSC_TIME_ZONE_OFFSET_EET = - 2 * 60,
+ NSC_TIME_ZONE_OFFSET_CET = - 1 * 60,
+ NSC_TIME_ZONE_OFFSET_FWT = - 1 * 60,
+ NSC_TIME_ZONE_OFFSET_MET = - 1 * 60,
+ NSC_TIME_ZONE_OFFSET_MEWT = - 1 * 60,
+ NSC_TIME_ZONE_OFFSET_GMT = 0,
+ NSC_TIME_ZONE_OFFSET_UTC = 0,
+ NSC_TIME_ZONE_OFFSET_WET = 0,
+ NSC_TIME_ZONE_OFFSET_WAT = 1 * 60,
+ NSC_TIME_ZONE_OFFSET_AST = 4 * 60,
+ NSC_TIME_ZONE_OFFSET_EST = 5 * 60,
+ NSC_TIME_ZONE_OFFSET_CST = 6 * 60,
+ NSC_TIME_ZONE_OFFSET_MST = 7 * 60,
+ NSC_TIME_ZONE_OFFSET_PST = 8 * 60,
+ NSC_TIME_ZONE_OFFSET_YST = 9 * 60,
+ NSC_TIME_ZONE_OFFSET_AHST = 10 * 60,
+ NSC_TIME_ZONE_OFFSET_CAT = 10 * 60,
+ NSC_TIME_ZONE_OFFSET_HST = 10 * 60,
+ NSC_TIME_ZONE_OFFSET_IDLW = 12 * 60,
+
+ /* Daylight saving modified timezones */
+ NSC_TIME_ZONE_OFFSET_NZDT = NSC_TIME_ZONE_OFFSET_NZT - 60,
+ NSC_TIME_ZONE_OFFSET_EADT = NSC_TIME_ZONE_OFFSET_EAST - 60,
+ NSC_TIME_ZONE_OFFSET_WADT = NSC_TIME_ZONE_OFFSET_WAST - 60,
+ NSC_TIME_ZONE_OFFSET_CEST = NSC_TIME_ZONE_OFFSET_CET - 60,
+ NSC_TIME_ZONE_OFFSET_FST = NSC_TIME_ZONE_OFFSET_FWT - 60,
+ NSC_TIME_ZONE_OFFSET_MEST = NSC_TIME_ZONE_OFFSET_MET - 60,
+ NSC_TIME_ZONE_OFFSET_MESZ = NSC_TIME_ZONE_OFFSET_MET - 60,
+ NSC_TIME_ZONE_OFFSET_BST = NSC_TIME_ZONE_OFFSET_GMT - 60,
+ NSC_TIME_ZONE_OFFSET_ADT = NSC_TIME_ZONE_OFFSET_AST - 60,
+ NSC_TIME_ZONE_OFFSET_EDT = NSC_TIME_ZONE_OFFSET_EST - 60,
+ NSC_TIME_ZONE_OFFSET_CDT = NSC_TIME_ZONE_OFFSET_CST - 60,
+ NSC_TIME_ZONE_OFFSET_MDT = NSC_TIME_ZONE_OFFSET_MST - 60,
+ NSC_TIME_ZONE_OFFSET_PDT = NSC_TIME_ZONE_OFFSET_PST - 60,
+ NSC_TIME_ZONE_OFFSET_YDT = NSC_TIME_ZONE_OFFSET_YST - 60,
+ NSC_TIME_ZONE_OFFSET_HDT = NSC_TIME_ZONE_OFFSET_HST - 60,
+
+ /* Military timezones */
+ NSC_TIME_ZONE_OFFSET_Y = -12 * 60,
+ NSC_TIME_ZONE_OFFSET_X = -11 * 60,
+ NSC_TIME_ZONE_OFFSET_W = -10 * 60,
+ NSC_TIME_ZONE_OFFSET_V = - 9 * 60,
+ NSC_TIME_ZONE_OFFSET_U = - 8 * 60,
+ NSC_TIME_ZONE_OFFSET_T = - 7 * 60,
+ NSC_TIME_ZONE_OFFSET_S = - 6 * 60,
+ NSC_TIME_ZONE_OFFSET_R = - 5 * 60,
+ NSC_TIME_ZONE_OFFSET_Q = - 4 * 60,
+ NSC_TIME_ZONE_OFFSET_P = - 3 * 60,
+ NSC_TIME_ZONE_OFFSET_O = - 2 * 60,
+ NSC_TIME_ZONE_OFFSET_N = - 1 * 60,
+ NSC_TIME_ZONE_OFFSET_Z = 0 * 60,
+ NSC_TIME_ZONE_OFFSET_A = 1 * 60,
+ NSC_TIME_ZONE_OFFSET_B = 2 * 60,
+ NSC_TIME_ZONE_OFFSET_C = 3 * 60,
+ NSC_TIME_ZONE_OFFSET_D = 4 * 60,
+ NSC_TIME_ZONE_OFFSET_E = 5 * 60,
+ NSC_TIME_ZONE_OFFSET_F = 6 * 60,
+ NSC_TIME_ZONE_OFFSET_G = 7 * 60,
+ NSC_TIME_ZONE_OFFSET_H = 8 * 60,
+ NSC_TIME_ZONE_OFFSET_I = 9 * 60,
+ NSC_TIME_ZONE_OFFSET_K = 10 * 60,
+ NSC_TIME_ZONE_OFFSET_L = 11 * 60,
+ NSC_TIME_ZONE_OFFSET_M = 12 * 60,
+};
+
+/**
+ * List of timezones.
+ *
+ * The order here is the order they appear in the `timezone_mins` array.
+ * So there is value in putting the most common timezones first.
+ */
+enum nsc_time_zones {
+ NSC_TIME_ZONE_IDLE,
+ NSC_TIME_ZONE_NZST,
+ NSC_TIME_ZONE_NZT,
+ NSC_TIME_ZONE_EAST,
+ NSC_TIME_ZONE_GST,
+ NSC_TIME_ZONE_JST,
+ NSC_TIME_ZONE_CCT,
+ NSC_TIME_ZONE_WAST,
+ NSC_TIME_ZONE_EET,
+ NSC_TIME_ZONE_CET,
+ NSC_TIME_ZONE_FWT,
+ NSC_TIME_ZONE_MET,
+ NSC_TIME_ZONE_MEWT,
+ NSC_TIME_ZONE_GMT,
+ NSC_TIME_ZONE_UTC,
+ NSC_TIME_ZONE_WET,
+ NSC_TIME_ZONE_WAT,
+ NSC_TIME_ZONE_AST,
+ NSC_TIME_ZONE_EST,
+ NSC_TIME_ZONE_CST,
+ NSC_TIME_ZONE_MST,
+ NSC_TIME_ZONE_PST,
+ NSC_TIME_ZONE_YST,
+ NSC_TIME_ZONE_AHST,
+ NSC_TIME_ZONE_CAT,
+ NSC_TIME_ZONE_HST,
+ NSC_TIME_ZONE_IDLW,
+ NSC_TIME_ZONE_NZDT,
+ NSC_TIME_ZONE_EADT,
+ NSC_TIME_ZONE_WADT,
+ NSC_TIME_ZONE_CEST,
+ NSC_TIME_ZONE_FST,
+ NSC_TIME_ZONE_MEST,
+ NSC_TIME_ZONE_MESZ,
+ NSC_TIME_ZONE_BST,
+ NSC_TIME_ZONE_ADT,
+ NSC_TIME_ZONE_EDT,
+ NSC_TIME_ZONE_CDT,
+ NSC_TIME_ZONE_MDT,
+ NSC_TIME_ZONE_PDT,
+ NSC_TIME_ZONE_YDT,
+ NSC_TIME_ZONE_HDT,
+ NSC_TIME_ZONE_Y,
+ NSC_TIME_ZONE_X,
+ NSC_TIME_ZONE_W,
+ NSC_TIME_ZONE_V,
+ NSC_TIME_ZONE_U,
+ NSC_TIME_ZONE_T,
+ NSC_TIME_ZONE_S,
+ NSC_TIME_ZONE_R,
+ NSC_TIME_ZONE_Q,
+ NSC_TIME_ZONE_P,
+ NSC_TIME_ZONE_O,
+ NSC_TIME_ZONE_N,
+ NSC_TIME_ZONE_Z,
+ NSC_TIME_ZONE_A,
+ NSC_TIME_ZONE_B,
+ NSC_TIME_ZONE_C,
+ NSC_TIME_ZONE_D,
+ NSC_TIME_ZONE_E,
+ NSC_TIME_ZONE_F,
+ NSC_TIME_ZONE_G,
+ NSC_TIME_ZONE_H,
+ NSC_TIME_ZONE_I,
+ NSC_TIME_ZONE_K,
+ NSC_TIME_ZONE_L,
+ NSC_TIME_ZONE_M,
+ NSC_TIME_ZONE__COUNT
+};
+
+/**
+ * Array of minute offsets for timezones.
+ */
+static const int16_t timezone_mins[NSC_TIME_ZONE__COUNT] = {
+ [NSC_TIME_ZONE_IDLE] = NSC_TIME_ZONE_OFFSET_IDLE,
+ [NSC_TIME_ZONE_NZST] = NSC_TIME_ZONE_OFFSET_NZST,
+ [NSC_TIME_ZONE_NZT] = NSC_TIME_ZONE_OFFSET_NZT,
+ [NSC_TIME_ZONE_EAST] = NSC_TIME_ZONE_OFFSET_EAST,
+ [NSC_TIME_ZONE_GST] = NSC_TIME_ZONE_OFFSET_GST,
+ [NSC_TIME_ZONE_JST] = NSC_TIME_ZONE_OFFSET_JST,
+ [NSC_TIME_ZONE_CCT] = NSC_TIME_ZONE_OFFSET_CCT,
+ [NSC_TIME_ZONE_WAST] = NSC_TIME_ZONE_OFFSET_WAST,
+ [NSC_TIME_ZONE_EET] = NSC_TIME_ZONE_OFFSET_EET,
+ [NSC_TIME_ZONE_CET] = NSC_TIME_ZONE_OFFSET_CET,
+ [NSC_TIME_ZONE_FWT] = NSC_TIME_ZONE_OFFSET_FWT,
+ [NSC_TIME_ZONE_MET] = NSC_TIME_ZONE_OFFSET_MET,
+ [NSC_TIME_ZONE_MEWT] = NSC_TIME_ZONE_OFFSET_MEWT,
+ [NSC_TIME_ZONE_GMT] = NSC_TIME_ZONE_OFFSET_GMT,
+ [NSC_TIME_ZONE_UTC] = NSC_TIME_ZONE_OFFSET_UTC,
+ [NSC_TIME_ZONE_WET] = NSC_TIME_ZONE_OFFSET_WET,
+ [NSC_TIME_ZONE_WAT] = NSC_TIME_ZONE_OFFSET_WAT,
+ [NSC_TIME_ZONE_AST] = NSC_TIME_ZONE_OFFSET_AST,
+ [NSC_TIME_ZONE_EST] = NSC_TIME_ZONE_OFFSET_EST,
+ [NSC_TIME_ZONE_CST] = NSC_TIME_ZONE_OFFSET_CST,
+ [NSC_TIME_ZONE_MST] = NSC_TIME_ZONE_OFFSET_MST,
+ [NSC_TIME_ZONE_PST] = NSC_TIME_ZONE_OFFSET_PST,
+ [NSC_TIME_ZONE_YST] = NSC_TIME_ZONE_OFFSET_YST,
+ [NSC_TIME_ZONE_AHST] = NSC_TIME_ZONE_OFFSET_AHST,
+ [NSC_TIME_ZONE_CAT] = NSC_TIME_ZONE_OFFSET_CAT,
+ [NSC_TIME_ZONE_HST] = NSC_TIME_ZONE_OFFSET_HST,
+ [NSC_TIME_ZONE_IDLW] = NSC_TIME_ZONE_OFFSET_IDLW,
+ [NSC_TIME_ZONE_NZDT] = NSC_TIME_ZONE_OFFSET_NZDT,
+ [NSC_TIME_ZONE_EADT] = NSC_TIME_ZONE_OFFSET_EADT,
+ [NSC_TIME_ZONE_WADT] = NSC_TIME_ZONE_OFFSET_WADT,
+ [NSC_TIME_ZONE_CEST] = NSC_TIME_ZONE_OFFSET_CEST,
+ [NSC_TIME_ZONE_FST] = NSC_TIME_ZONE_OFFSET_FST,
+ [NSC_TIME_ZONE_MEST] = NSC_TIME_ZONE_OFFSET_MEST,
+ [NSC_TIME_ZONE_MESZ] = NSC_TIME_ZONE_OFFSET_MESZ,
+ [NSC_TIME_ZONE_BST] = NSC_TIME_ZONE_OFFSET_BST,
+ [NSC_TIME_ZONE_ADT] = NSC_TIME_ZONE_OFFSET_ADT,
+ [NSC_TIME_ZONE_EDT] = NSC_TIME_ZONE_OFFSET_EDT,
+ [NSC_TIME_ZONE_CDT] = NSC_TIME_ZONE_OFFSET_CDT,
+ [NSC_TIME_ZONE_MDT] = NSC_TIME_ZONE_OFFSET_MDT,
+ [NSC_TIME_ZONE_PDT] = NSC_TIME_ZONE_OFFSET_PDT,
+ [NSC_TIME_ZONE_YDT] = NSC_TIME_ZONE_OFFSET_YDT,
+ [NSC_TIME_ZONE_HDT] = NSC_TIME_ZONE_OFFSET_HDT,
+ [NSC_TIME_ZONE_Y] = NSC_TIME_ZONE_OFFSET_Y,
+ [NSC_TIME_ZONE_X] = NSC_TIME_ZONE_OFFSET_X,
+ [NSC_TIME_ZONE_W] = NSC_TIME_ZONE_OFFSET_W,
+ [NSC_TIME_ZONE_V] = NSC_TIME_ZONE_OFFSET_V,
+ [NSC_TIME_ZONE_U] = NSC_TIME_ZONE_OFFSET_U,
+ [NSC_TIME_ZONE_T] = NSC_TIME_ZONE_OFFSET_T,
+ [NSC_TIME_ZONE_S] = NSC_TIME_ZONE_OFFSET_S,
+ [NSC_TIME_ZONE_R] = NSC_TIME_ZONE_OFFSET_R,
+ [NSC_TIME_ZONE_Q] = NSC_TIME_ZONE_OFFSET_Q,
+ [NSC_TIME_ZONE_P] = NSC_TIME_ZONE_OFFSET_P,
+ [NSC_TIME_ZONE_O] = NSC_TIME_ZONE_OFFSET_O,
+ [NSC_TIME_ZONE_N] = NSC_TIME_ZONE_OFFSET_N,
+ [NSC_TIME_ZONE_Z] = NSC_TIME_ZONE_OFFSET_Z,
+ [NSC_TIME_ZONE_A] = NSC_TIME_ZONE_OFFSET_A,
+ [NSC_TIME_ZONE_B] = NSC_TIME_ZONE_OFFSET_B,
+ [NSC_TIME_ZONE_C] = NSC_TIME_ZONE_OFFSET_C,
+ [NSC_TIME_ZONE_D] = NSC_TIME_ZONE_OFFSET_D,
+ [NSC_TIME_ZONE_E] = NSC_TIME_ZONE_OFFSET_E,
+ [NSC_TIME_ZONE_F] = NSC_TIME_ZONE_OFFSET_F,
+ [NSC_TIME_ZONE_G] = NSC_TIME_ZONE_OFFSET_G,
+ [NSC_TIME_ZONE_H] = NSC_TIME_ZONE_OFFSET_H,
+ [NSC_TIME_ZONE_I] = NSC_TIME_ZONE_OFFSET_I,
+ [NSC_TIME_ZONE_K] = NSC_TIME_ZONE_OFFSET_K,
+ [NSC_TIME_ZONE_L] = NSC_TIME_ZONE_OFFSET_L,
+ [NSC_TIME_ZONE_M] = NSC_TIME_ZONE_OFFSET_M
+};
+
+/**
+ * Array of timezone names. Order does not matter.
+ */
+static const char * const timezones[NSC_TIME_ZONE__COUNT] = {
+ [NSC_TIME_ZONE_IDLE] = "IDLE",
+ [NSC_TIME_ZONE_NZST] = "NZST",
+ [NSC_TIME_ZONE_NZT] = "NZT",
+ [NSC_TIME_ZONE_EAST] = "EAST",
+ [NSC_TIME_ZONE_GST] = "GST",
+ [NSC_TIME_ZONE_JST] = "JST",
+ [NSC_TIME_ZONE_CCT] = "CCT",
+ [NSC_TIME_ZONE_WAST] = "WAST",
+ [NSC_TIME_ZONE_EET] = "EET",
+ [NSC_TIME_ZONE_CET] = "CET",
+ [NSC_TIME_ZONE_FWT] = "FWT",
+ [NSC_TIME_ZONE_MET] = "MET",
+ [NSC_TIME_ZONE_MEWT] = "MEWT",
+ [NSC_TIME_ZONE_GMT] = "GMT",
+ [NSC_TIME_ZONE_UTC] = "UTC",
+ [NSC_TIME_ZONE_WET] = "WET",
+ [NSC_TIME_ZONE_WAT] = "WAT",
+ [NSC_TIME_ZONE_AST] = "AST",
+ [NSC_TIME_ZONE_EST] = "EST",
+ [NSC_TIME_ZONE_CST] = "CST",
+ [NSC_TIME_ZONE_MST] = "MST",
+ [NSC_TIME_ZONE_PST] = "PST",
+ [NSC_TIME_ZONE_YST] = "YST",
+ [NSC_TIME_ZONE_AHST] = "AHST",
+ [NSC_TIME_ZONE_CAT] = "CAT",
+ [NSC_TIME_ZONE_HST] = "HST",
+ [NSC_TIME_ZONE_IDLW] = "IDLW",
+ [NSC_TIME_ZONE_NZDT] = "NZDT",
+ [NSC_TIME_ZONE_EADT] = "EADT",
+ [NSC_TIME_ZONE_WADT] = "WADT",
+ [NSC_TIME_ZONE_CEST] = "CEST",
+ [NSC_TIME_ZONE_FST] = "FST",
+ [NSC_TIME_ZONE_MEST] = "MEST",
+ [NSC_TIME_ZONE_MESZ] = "MESZ",
+ [NSC_TIME_ZONE_BST] = "BST",
+ [NSC_TIME_ZONE_ADT] = "ADT",
+ [NSC_TIME_ZONE_EDT] = "EDT",
+ [NSC_TIME_ZONE_CDT] = "CDT",
+ [NSC_TIME_ZONE_MDT] = "MDT",
+ [NSC_TIME_ZONE_PDT] = "PDT",
+ [NSC_TIME_ZONE_YDT] = "YDT",
+ [NSC_TIME_ZONE_HDT] = "HDT",
+ [NSC_TIME_ZONE_Y] = "Y",
+ [NSC_TIME_ZONE_X] = "X",
+ [NSC_TIME_ZONE_W] = "W",
+ [NSC_TIME_ZONE_V] = "V",
+ [NSC_TIME_ZONE_U] = "U",
+ [NSC_TIME_ZONE_T] = "T",
+ [NSC_TIME_ZONE_S] = "S",
+ [NSC_TIME_ZONE_R] = "R",
+ [NSC_TIME_ZONE_Q] = "Q",
+ [NSC_TIME_ZONE_P] = "P",
+ [NSC_TIME_ZONE_O] = "O",
+ [NSC_TIME_ZONE_N] = "N",
+ [NSC_TIME_ZONE_Z] = "Z",
+ [NSC_TIME_ZONE_A] = "A",
+ [NSC_TIME_ZONE_B] = "B",
+ [NSC_TIME_ZONE_C] = "C",
+ [NSC_TIME_ZONE_D] = "D",
+ [NSC_TIME_ZONE_E] = "E",
+ [NSC_TIME_ZONE_F] = "F",
+ [NSC_TIME_ZONE_G] = "G",
+ [NSC_TIME_ZONE_H] = "H",
+ [NSC_TIME_ZONE_I] = "I",
+ [NSC_TIME_ZONE_K] = "K",
+ [NSC_TIME_ZONE_L] = "L",
+ [NSC_TIME_ZONE_M] = "M"
+};
+
+/**
+ * Flags for tracking the components of a date that have been parsed.
+ */
+enum nsc_date_component_flags {
+ NSC_COMPONENT_FLAGS_NONE = 0,
+ NSC_COMPONENT_FLAGS_HAVE_YEARS = (1 << 0),
+ NSC_COMPONENT_FLAGS_HAVE_MONTHS = (1 << 1),
+ NSC_COMPONENT_FLAGS_HAVE_DAYS = (1 << 2),
+ NSC_COMPONENT_FLAGS_HAVE_HOURS = (1 << 3),
+ NSC_COMPONENT_FLAGS_HAVE_MINS = (1 << 4),
+ NSC_COMPONENT_FLAGS_HAVE_SECS = (1 << 5),
+ NSC_COMPONENT_FLAGS_HAVE_TIMEZONE = (1 << 6),
+ NSC_COMPONENT_FLAGS_HAVE_WEEKDAY = (1 << 7),
+ NSC_COMPONENT_FLAGS__HAVE_YYYYMMDD =
+ NSC_COMPONENT_FLAGS_HAVE_YEARS |
+ NSC_COMPONENT_FLAGS_HAVE_MONTHS |
+ NSC_COMPONENT_FLAGS_HAVE_DAYS,
+ NSC_COMPONENT_FLAGS__HAVE_HHMMSS =
+ NSC_COMPONENT_FLAGS_HAVE_HOURS |
+ NSC_COMPONENT_FLAGS_HAVE_MINS |
+ NSC_COMPONENT_FLAGS_HAVE_SECS,
+ NSC_COMPONENT_FLAGS__HAVE_ALL =
+ NSC_COMPONENT_FLAGS_HAVE_YEARS |
+ NSC_COMPONENT_FLAGS_HAVE_MONTHS |
+ NSC_COMPONENT_FLAGS_HAVE_DAYS |
+ NSC_COMPONENT_FLAGS_HAVE_HOURS |
+ NSC_COMPONENT_FLAGS_HAVE_MINS |
+ NSC_COMPONENT_FLAGS_HAVE_SECS |
+ NSC_COMPONENT_FLAGS_HAVE_TIMEZONE
+};
+
+/**
+ * Context for date parsing.
+ */
+struct nsc_date_parse_ctx {
+ char prev; /**< Used for handling neumenrical timezone */
+ uint8_t secs;
+ uint8_t mins;
+ uint8_t hours;
+ uint8_t day;
+ uint8_t month;
+ uint16_t years;
+ int16_t timezone_offset_mins;
+};
+
+
+/**
+ * Helper for testing whether any of the flags in mask are set.
+ *
+ * \param[in] flags Flags to to check.
+ * \param[in] mask The set of flags to check for in `flags`.
+ * \return true iff any flags in `mask` are set in `flags`, else false.
+ */
+static bool flags_chk(
+ enum nsc_date_component_flags flags,
+ enum nsc_date_component_flags mask)
+{
+ return flags & mask;
+}
+
+/**
+ * Helper for testing whether all of the flags in mask are set.
+ *
+ * \param[in] flags Flags to to check.
+ * \param[in] mask The set of flags to check for in `flags`.
+ * \return true iff all flags in `mask` are set in `flags`, else false.
+ */
+static bool flags_chk_all(
+ enum nsc_date_component_flags flags,
+ enum nsc_date_component_flags mask)
+{
+ return (flags & mask) == mask;
+}
+
+
+/**
+ * Test for a weekday name in a string (case insensitive).
+ *
+ * \param[in] str String to parse a weekday name in.
+ * \param[in] len Number of consecutive alphabetical characters.
+ * \param[in,out] flags Flags indicating which date components have been
+ * found in `str` already. If a weekday component
+ * is found, the weekday flag is set.
+ * \return true iff weekday component is found, else false.
+ */
+static inline bool time__parse_weekday(
+ const char *str,
+ size_t len,
+ enum nsc_date_component_flags *flags)
+{
+ const char * const *names = (len == 3) ?
+ weekdays_short : weekdays_long;
+
+ if (flags_chk(*flags, NSC_COMPONENT_FLAGS_HAVE_WEEKDAY)) {
+ return false;
+ }
+
+ for (uint32_t i = 0; i < NSC_TIME_WEEKDAY__COUNT; i++) {
+ if (ascii_strings_count_equal_caseless(names[i], str) == len) {
+ *flags |= NSC_COMPONENT_FLAGS_HAVE_WEEKDAY;
+ return true;
+ }
+ }
+
+ return false;
+}
+
+
+/**
+ * Attempt to parse a month name in a string (case insensitive).
+ *
+ * \param[in] str String to parse a month name in.
+ * \param[in] len Number of consecutive alphabetical characters.
+ * \param[in,out] flags Flags indicating which date components have been
+ * found in `str` already. If a month component
+ * is found, the month flag is set.
+ * \param[in,out] ctx Current date parsing context. If month component
+ * is found, the context's month value is set.
+ * \return true iff month name component is found, else false.
+ */
+static inline bool time__parse_month(
+ const char *str,
+ size_t len,
+ enum nsc_date_component_flags *flags,
+ struct nsc_date_parse_ctx *ctx)
+{
+ if (flags_chk(*flags, NSC_COMPONENT_FLAGS_HAVE_MONTHS)) {
+ return false;
+ }
+
+ for (uint32_t i = 0; i < NSC_TIME_MONTH__COUNT; i++) {
+ if (ascii_strings_count_equal_caseless(months[i], str) == len) {
+ *flags |= NSC_COMPONENT_FLAGS_HAVE_MONTHS;
+ ctx->month = i;
+ return true;
+ }
+ }
+
+ return false;
+}
+
+
+/**
+ * Attempt to parse a timezone name in a string (case insensitive).
+ *
+ * \param[in] str String to parse a timezone name in.
+ * \param[in] len Number of consecutive alphabetical characters.
+ * \param[in,out] flags Flags indicating which date components have been
+ * found in `str` already. If a timezone component
+ * is found, the timezone flag is set.
+ * \param[in,out] ctx Current date parsing context. If timezone component
+ * is found, the context's timezone value is set.
+ * \return true iff timezone name component is found, else false.
+ */
+static inline bool time__parse_timezone(
+ const char *str,
+ size_t len,
+ enum nsc_date_component_flags *flags,
+ struct nsc_date_parse_ctx *ctx)
+{
+ if (flags_chk(*flags, NSC_COMPONENT_FLAGS_HAVE_TIMEZONE)) {
+ return false;
+ }
+
+ for (uint32_t i = 0; i < NSC_TIME_ZONE__COUNT; i++) {
+ if (ascii_strings_count_equal_caseless(
+ timezones[i], str) == len) {
+ *flags |= NSC_COMPONENT_FLAGS_HAVE_TIMEZONE;
+ ctx->timezone_offset_mins = timezone_mins[i];
+ return true;
+ }
+ }
+
+ return false;
+}
+
+
+/**
+ * Attempt to parse an "hh:mm:ss" time from a string.
+ *
+ * \param[in] str String to parse a time in.
+ * \param[in,out] len The number of characters until the first non-digit.
+ * Iff a time component is found, updated to the number
+ * of comsumend characters.
+ * \param[in,out] flags Flags indicating which date components have been
+ * found in `str` already. If a time component
+ * is found, the hours, mins and secs flags are set.
+ * \param[in,out] ctx Current date parsing context. If time component
+ * is found, the context's time values are set.
+ * \return true iff time component is found, else false.
+ */
+static inline bool time__parse_hh_mm_ss(
+ const char *str,
+ size_t *len,
+ enum nsc_date_component_flags *flags,
+ struct nsc_date_parse_ctx *ctx)
+{
+ size_t l;
+
+ if (*len != 2 || flags_chk(*flags, NSC_COMPONENT_FLAGS__HAVE_HHMMSS)) {
+ return false;
+ }
+
+ l = *len + ascii_count_digit_or_colon(str + *len);
+ if (l == 8) {
+ int h, m, s, count;
+ count = sscanf(str, "%02d:%02d:%02d", &h, &m, &s);
+ if (count == 3) {
+ ctx->hours = h;
+ ctx->mins = m;
+ ctx->secs = s;
+ *flags |= NSC_COMPONENT_FLAGS__HAVE_HHMMSS;
+ *len = l;
+ return true;
+ }
+ } else if (l == 5) {
+ int h, m, count;
+ count = sscanf(str, "%02d:%02d", &h, &m);
+ if (count == 2) {
+ ctx->hours = h;
+ ctx->mins = m;
+ ctx->secs = 0;
+ *flags |= NSC_COMPONENT_FLAGS__HAVE_HHMMSS;
+ *len = l;
+ return true;
+ }
+ }
+
+ return false;
+}
+
+
+/**
+ * Attempt to parse a number from a date string.
+ *
+ * How the number is treated depends on various things:
+ *
+ * - its character length,
+ * - its value,
+ * - which date components have already been parsed
+ *
+ * \param[in] str String to parse a time in.
+ * \param[in] len The number of characters until the first non-digit.
+ * \param[in,out] flags Flags indicating which date components have been
+ * found in `str` already. If any component is found,
+ * their flags are set.
+ * \param[in,out] ctx Current date parsing context. If any component
+ * is found, the appropriate context values are set.
+ * \return true iff a component is found, else false.
+ */
+static inline bool time__parse_number(
+ const char *str,
+ size_t len,
+ enum nsc_date_component_flags *flags,
+ struct nsc_date_parse_ctx *ctx)
+{
+ int value;
+
+ if (len != ascii_string_to_int(str, &value)) {
+ return false;
+ }
+
+ switch (len) {
+ case 8:
+ if (!flags_chk(*flags, NSC_COMPONENT_FLAGS__HAVE_YYYYMMDD)) {
+ ctx->years = value / 10000;
+ ctx->month = (value % 10000) / 100 - 1;
+ ctx->day = value % 100 - 1;
+ *flags |= NSC_COMPONENT_FLAGS__HAVE_YYYYMMDD;
+ return true;
+ }
+ break;
+
+ case 4:
+ if (!flags_chk(*flags, NSC_COMPONENT_FLAGS_HAVE_TIMEZONE)) {
+ if (ascii_is_sign(ctx->prev) && value <= 1400) {
+ ctx->timezone_offset_mins =
+ value / 100 * 60 +
+ value % 100;
+ if (ctx->prev == '+') {
+ ctx->timezone_offset_mins *= -1;
+ }
+ *flags |= NSC_COMPONENT_FLAGS_HAVE_TIMEZONE;
+ return true;
+ }
+ }
+ if (!flags_chk(*flags, NSC_COMPONENT_FLAGS_HAVE_YEARS)) {
+ ctx->years = value;
+ *flags |= NSC_COMPONENT_FLAGS_HAVE_YEARS;
+ return true;
+ }
+ break;
+
+ case 2:
+ case 1:
+ if (!flags_chk(*flags, NSC_COMPONENT_FLAGS_HAVE_DAYS) &&
+ value > 0 && value <= 31) {
+ ctx->day = value - 1;
+ *flags |= NSC_COMPONENT_FLAGS_HAVE_DAYS;
+ return true;
+ }
+ if (!flags_chk(*flags, NSC_COMPONENT_FLAGS_HAVE_YEARS)) {
+ ctx->years = (value > 70) ?
+ value + 1900 :
+ value + 2000;
+ *flags |= NSC_COMPONENT_FLAGS_HAVE_YEARS;
+ return true;
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ return false;
+}
+
+/**
+ * Get number of leap days up until end of given year.
+ *
+ * \param[in] year Year to count leap years up to.
+ * \return Number of leap days up to end of `year`.
+ */
+static inline int time__get_leap_days(int year)
+{
+ return (year / 4) - (year / 100) + (year / 400);
+}
+
+
+/**
+ * Helper to convert a date string context to a time_t.
+ *
+ * \param[in] ctx Current date parsing context.
+ * \param[in] flags Flags indicating which date components have been set.
+ * \param[out] time Returns the number of seconds since 1 Jan 1970 00:00 UTC.
+ * \return NSERROR_OK on success, appropriate error otherwise.
+ */
+static nserror time__ctx_to_time_t(
+ const struct nsc_date_parse_ctx *ctx,
+ enum nsc_date_component_flags flags,
+ time_t *time)
+{
+ enum {
+ NSC_MONTH_DAYS_JAN = 31,
+ NSC_MONTH_DAYS_FEB = 28, /**< Leap years handled separatly */
+ NSC_MONTH_DAYS_MAR = 31,
+ NSC_MONTH_DAYS_APR = 30,
+ NSC_MONTH_DAYS_MAY = 31,
+ NSC_MONTH_DAYS_JUN = 30,
+ NSC_MONTH_DAYS_JUL = 31,
+ NSC_MONTH_DAYS_AUG = 31,
+ NSC_MONTH_DAYS_SEP = 30,
+ NSC_MONTH_DAYS_OCT = 31,
+ NSC_MONTH_DAYS_NOV = 30,
+ NSC_MONTH_DAYS_DEC = 31
+ };
+ enum {
+ NSC_MONTH_OFF_JAN = 0,
+ NSC_MONTH_OFF_FEB = NSC_MONTH_OFF_JAN + NSC_MONTH_DAYS_JAN,
+ NSC_MONTH_OFF_MAR = NSC_MONTH_OFF_FEB + NSC_MONTH_DAYS_FEB,
+ NSC_MONTH_OFF_APR = NSC_MONTH_OFF_MAR + NSC_MONTH_DAYS_MAR,
+ NSC_MONTH_OFF_MAY = NSC_MONTH_OFF_APR + NSC_MONTH_DAYS_APR,
+ NSC_MONTH_OFF_JUN = NSC_MONTH_OFF_MAY + NSC_MONTH_DAYS_MAY,
+ NSC_MONTH_OFF_JUL = NSC_MONTH_OFF_JUN + NSC_MONTH_DAYS_JUN,
+ NSC_MONTH_OFF_AUG = NSC_MONTH_OFF_JUL + NSC_MONTH_DAYS_JUL,
+ NSC_MONTH_OFF_SEP = NSC_MONTH_OFF_AUG + NSC_MONTH_DAYS_AUG,
+ NSC_MONTH_OFF_OCT = NSC_MONTH_OFF_SEP + NSC_MONTH_DAYS_SEP,
+ NSC_MONTH_OFF_NOV = NSC_MONTH_OFF_OCT + NSC_MONTH_DAYS_OCT,
+ NSC_MONTH_OFF_DEC = NSC_MONTH_OFF_NOV + NSC_MONTH_DAYS_NOV
+ };
+ static const uint16_t month_offsets[NSC_TIME_MONTH__COUNT] = {
+ [NSC_TIME_MONTH_JAN] = NSC_MONTH_OFF_JAN,
+ [NSC_TIME_MONTH_FEB] = NSC_MONTH_OFF_FEB,
+ [NSC_TIME_MONTH_MAR] = NSC_MONTH_OFF_MAR,
+ [NSC_TIME_MONTH_APR] = NSC_MONTH_OFF_APR,
+ [NSC_TIME_MONTH_MAY] = NSC_MONTH_OFF_MAY,
+ [NSC_TIME_MONTH_JUN] = NSC_MONTH_OFF_JUN,
+ [NSC_TIME_MONTH_JUL] = NSC_MONTH_OFF_JUL,
+ [NSC_TIME_MONTH_AUG] = NSC_MONTH_OFF_AUG,
+ [NSC_TIME_MONTH_SEP] = NSC_MONTH_OFF_SEP,
+ [NSC_TIME_MONTH_OCT] = NSC_MONTH_OFF_OCT,
+ [NSC_TIME_MONTH_NOV] = NSC_MONTH_OFF_NOV,
+ [NSC_TIME_MONTH_DEC] = NSC_MONTH_OFF_DEC
+ };
+ int year_days = (ctx->years - 1970) * 365;
+ int month_days = month_offsets[ctx->month];
+ int year = (ctx->month < NSC_TIME_MONTH_FEB) ?
+ ctx->years - 1 : ctx->years;
+ int leap_days = time__get_leap_days(year) - time__get_leap_days(1969);
+ int total_days = year_days + month_days + ctx->day + leap_days;
+
+ int mins = (int)ctx->mins + (int)ctx->timezone_offset_mins;
+
+ *time = (((((time_t)(total_days)) * 24) +
+ ctx->hours) * 60 +
+ mins) * 60 +
+ ctx->secs;
+ return NSERROR_OK;
+}
+
+
+/**
+ * Parse a date string to a `time_t`.
+ *
+ * \param[in] str String to parse.
+ * \param[out] time Returns the number of seconds since 1 Jan 1970 00:00 UTC.
+ * \return `NSERROR_OK` on success, else
+ * `NSERROR_INVALID` if the string parsing failed,
+ * appropriate error otherwise.
+ */
+static nserror time__get_date(const char *str, time_t *time)
+{
+ enum nsc_date_component_flags flags = NSC_COMPONENT_FLAGS_NONE;
+ struct nsc_date_parse_ctx ctx = {
+ .prev = '\0',
+ .secs = 0,
+ .mins = 0,
+ .hours = 0,
+ .day = 0,
+ .month = 0,
+ .years = 0,
+ .timezone_offset_mins = 0
+ };
+
+ if (str == NULL || time == NULL) {
+ return NSERROR_BAD_PARAMETER;
+ }
+
+ /* Parse */
+ while (*str != '\0' &&
+ !flags_chk_all(flags, NSC_COMPONENT_FLAGS__HAVE_ALL)) {
+ size_t len = 1;
+
+ if (ascii_is_alpha(*str)) {
+ len += ascii_count_alpha(str + 1);
+
+ if (!time__parse_weekday(str, len, &flags) &&
+ !time__parse_month(str, len, &flags, &ctx) &&
+ !time__parse_timezone(str, len, &flags, &ctx)) {
+ return NSERROR_INVALID;
+ }
+
+ } else if (ascii_is_digit(*str)) {
+ len += ascii_count_digit(str + 1);
+
+ if (!time__parse_hh_mm_ss(str, &len, &flags, &ctx) &&
+ !time__parse_number(str, len, &flags, &ctx)) {
+ return NSERROR_INVALID;
+ }
+ }
+ ctx.prev = *str;
+ str += len;
+ }
+
+ /* The initial values of 0 are used if hours, mins, secs, and timezone
+ * are not found */
+ flags |= NSC_COMPONENT_FLAGS__HAVE_HHMMSS;
+ flags |= NSC_COMPONENT_FLAGS_HAVE_TIMEZONE;
+
+ /* Validate */
+ if (!flags_chk_all(flags, NSC_COMPONENT_FLAGS__HAVE_ALL)) {
+ return NSERROR_INVALID;
+ }
+ if (ctx.secs > 60 || ctx.mins > 59 || ctx.hours > 23 ||
+ ctx.day > 31 || ctx.month > 11) {
+ return NSERROR_INVALID;
+ }
+
+ /* Convert */
+ return time__ctx_to_time_t(&ctx, flags, time);
+}
+
+/* exported function documented in utils/time.h */
+nserror nsc_strntimet(const char *str, size_t size, time_t *timep)
+{
+ return time__get_date(str, timep);
+}
+
+# else
+
/* exported function documented in utils/time.h */
nserror nsc_strntimet(const char *str, size_t size, time_t *timep)
{
time_t result;
+ if (str == NULL || timep == NULL) {
+ return NSERROR_BAD_PARAMETER;
+ }
+
result = curl_getdate(str, NULL);
if (result == -1) {
@@ -196,3 +1001,5 @@ nserror nsc_strntimet(const char *str, size_t size, time_t *timep)
return NSERROR_OK;
}
+
+#endif