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-rw-r--r--lib/mlibc/options/posix/generic/time.cpp505
1 files changed, 0 insertions, 505 deletions
diff --git a/lib/mlibc/options/posix/generic/time.cpp b/lib/mlibc/options/posix/generic/time.cpp
deleted file mode 100644
index 14193af..0000000
--- a/lib/mlibc/options/posix/generic/time.cpp
+++ /dev/null
@@ -1,505 +0,0 @@
-#include <ctype.h>
-#include <langinfo.h>
-#include <stdio.h>
-#include <string.h>
-#include <time.h>
-
-#include <bits/ensure.h>
-#include <mlibc/strings.hpp>
-
-namespace {
-
-int month_to_day(int month) {
- switch(month){
- case 0: return 0;
- case 1: return 31;
- case 2: return 59;
- case 3: return 90;
- case 4: return 120;
- case 5: return 151;
- case 6: return 181;
- case 7: return 212;
- case 8: return 243;
- case 9: return 273;
- case 10: return 304;
- case 11: return 334;
- }
- return -1;
-}
-
-int is_leapyear(int year) {
- return year % 4 == 0 && (year % 100 != 0 || year % 400 == 0);
-}
-
-int month_and_year_to_day_in_year(int month, int year){
- int day = month_to_day(month);
- if(is_leapyear(year) && month < 2)
- return day + 1;
-
- return day;
-}
-
-int target_determination(int month) {
- switch(month){
- case 0: return 3;
- case 1: return 14;
- case 2: return 14;
- case 3: return 4;
- case 4: return 9;
- case 5: return 6;
- case 6: return 11;
- case 7: return 8;
- case 8: return 5;
- case 9: return 10;
- case 10: return 7;
- case 11: return 12;
- }
-
- return -1;
-}
-
-int doom_determination(int full_year) {
- int century = full_year / 100;
- int anchor = 2 + 5 * (century % 4) % 7;
-
- int year = full_year % 100;
-
- if(year % 2)
- year += 11;
-
- year /= 2;
-
- if(year % 2)
- year += 11;
-
- return 7 - (year % 7) + anchor;
-}
-
-//Determine day of week through the doomsday algorithm.
-int day_determination(int day, int month, int year) {
- int doom = doom_determination(year);
- bool leap = is_leapyear(year);
-
- int target = target_determination(month);
- if(leap && month < 2)
- target++;
-
- int doom_dif = (day - target) % 7;
- return (doom + doom_dif) % 7;
-}
-
-struct strptime_internal_state {
- bool has_century;
- bool has_year;
- bool has_month;
- bool has_day_of_month;
- bool has_day_of_year;
- bool has_day_of_week;
-
- bool full_year_given;
-
- int century;
-
- size_t format_index;
- size_t input_index;
-};
-
-char *strptime_internal(const char *__restrict input, const char *__restrict format,
- struct tm *__restrict tm, struct strptime_internal_state *__restrict state) {
- auto matchLanginfoItem = [&] (int start, size_t num, int &dest, bool &flag) -> bool {
- for(size_t i = start; i < (start + num); i++) {
- const char *mon = nl_langinfo(i);
- size_t len = strlen(mon);
- if(mlibc::strncasecmp(&input[state->input_index], mon, len))
- continue;
- state->input_index += len;
- dest = i - start;
- flag = true;
- return true;
- }
- return false;
- };
-
- auto matchNumericRange = [&] (int start, int end, int &dest, bool *flag) -> bool {
- int product = 0, n = 0;
- sscanf(&input[state->input_index], "%d%n", &product, &n);
- if(n == 0 || 2 < n)
- return false;
- if(product < start || product > end)
- return false;
- state->input_index += n;
- dest = product;
- if(flag) *flag = true;
- return true;
- };
-
- while(isspace(input[state->input_index]))
- state->input_index++;
-
- if(input[state->input_index] == '\0')
- return NULL;
-
- while(format[state->format_index] != '\0'){
- if(format[state->format_index] != '%'){
- if(isspace(format[state->format_index])){
- while(isspace(input[state->input_index++]));
- state->input_index--;
- }
- else {
- if(format[state->format_index] != input[state->input_index++])
- return NULL;
- }
- state->format_index++;
- continue;
- }
- state->format_index++;
- switch(format[state->format_index]){
- case '%':
- if(input[state->input_index++] != '%')
- return NULL;
- break;
- case 'a':
- case 'A': {
- if (!matchLanginfoItem(DAY_1, 7, tm->tm_wday, state->has_day_of_week) && \
- !matchLanginfoItem(ABDAY_1, 7, tm->tm_wday, state->has_day_of_week))
- return NULL;
- break;
- }
- case 'b':
- case 'B':
- case 'h': {
- if (!matchLanginfoItem(MON_1, 12, tm->tm_mon, state->has_month) && \
- !matchLanginfoItem(ABMON_1, 12, tm->tm_mon, state->has_month))
- return NULL;
- break;
- }
- case 'c':
- __ensure(!"strptime() %c directive unimplemented.");
- __builtin_unreachable();
- break;
- case 'C': {
- int product = 0, n = 0;
- sscanf(&input[state->input_index], "%d%n", &product, &n);
- if(n == 0 || 2 < n)
- return NULL;
- state->input_index += n;
- state->century = product;
- state->has_century = true;
- break;
- }
- case 'd': //`%d` and `%e` are equivalent
- case 'e': {
- if(!matchNumericRange(1, 31, tm->tm_mday, &state->has_day_of_month))
- return NULL;
- break;
- }
- case 'D': { //equivalent to `%m/%d/%y`
- size_t pre_fi = state->format_index;
- state->format_index = 0;
-
- char *result = strptime_internal(input, "%m/%d/%y", tm, state);
- if(result == NULL)
- return NULL;
-
- state->format_index = pre_fi;
- break;
- }
- case 'H': {
- if(!matchNumericRange(0, 23, tm->tm_hour, nullptr))
- return NULL;
- break;
- }
- case 'I': {
- if(!matchNumericRange(1, 12, tm->tm_hour, nullptr))
- return NULL;
- break;
- }
- case 'j': {
- if(!matchNumericRange(1, 366, tm->tm_yday, &state->has_day_of_year))
- return NULL;
- tm->tm_yday--;
- break;
- }
- case 'm': {
- if(!matchNumericRange(1, 12, tm->tm_mon, &state->has_month))
- return NULL;
- tm->tm_mon--;
- break;
- }
- case 'M': {
- if(!matchNumericRange(0, 59, tm->tm_min, nullptr))
- return NULL;
- break;
- }
- case 'n':
- case 't': {
- size_t n = 0;
- while(isspace(input[state->input_index++]))
- n++;
- if(n == 0)
- return NULL;
- state->input_index--;
- break;
- }
- case 'p': {
- const char *meridian_str = nl_langinfo(AM_STR);
- size_t len = strlen(meridian_str);
- if (!mlibc::strncasecmp(&input[state->input_index], meridian_str, len)) {
- tm->tm_hour %= 12;
- state->input_index += len;
- break;
- }
- meridian_str = nl_langinfo(PM_STR);
- len = strlen(meridian_str);
- if (!mlibc::strncasecmp(&input[state->input_index], meridian_str, len)) {
- tm->tm_hour %= 12;
- tm->tm_hour += 12;
- state->input_index += len;
- break;
- }
- break;
- }
- case 'r': { //equivalent to `%I:%M:%S %p`
- size_t pre_fi = state->format_index;
- state->format_index = 0;
-
- char *result = strptime_internal(input, "%I:%M:%S %p", tm, state);
- if(result == NULL)
- return NULL;
-
- state->format_index = pre_fi;
- break;
- }
- case 'R': { //equivalent to `%H:%M`
- size_t pre_fi = state->format_index;
- state->format_index = 0;
-
- char *result = strptime_internal(input, "%H:%M", tm, state);
- if(result == NULL)
- return NULL;
-
- state->format_index = pre_fi;
- break;
- }
- case 'S': {
- if(!matchNumericRange(0, 60, tm->tm_sec, nullptr))
- return NULL;
- break;
- }
- case 'T': { //equivalent to `%H:%M:%S`
- size_t pre_fi = state->format_index;
- state->format_index = 0;
-
- char *result = strptime_internal(input, "%H:%M:%S", tm, state);
- if(result == NULL)
- return NULL;
-
- state->format_index = pre_fi;
- break;
- }
- case 'U':
- __ensure(!"strptime() %U directive unimplemented.");
- __builtin_unreachable();
- break;
- case 'w': {
- int product = 0, n = 0;
- sscanf(&input[state->input_index], "%d%n", &product, &n);
- if(n == 0 || 1 < n)
- return NULL;
- state->input_index += n;
- tm->tm_wday = product;
- state->has_day_of_week = true;
- break;
- }
- case 'W':
- __ensure(!"strptime() %W directive unimplemented.");
- __builtin_unreachable();
- break;
- case 'x':
- __ensure(!"strptime() %x directive unimplemented.");
- __builtin_unreachable();
- break;
- case 'X':
- __ensure(!"strptime() %X directive unimplemented.");
- __builtin_unreachable();
- break;
- case 'y': {
- int product = 0, n = 0;
- sscanf(&input[state->input_index], "%d%n", &product, &n);
- if(n == 0 || 2 < n)
- return NULL;
- if(product < 69)
- product += 100;
- state->input_index += n;
- tm->tm_year = product;
- state->has_year = true;
- break;
- }
- case 'Y': {
- int product = 0, n = 0;
- sscanf(&input[state->input_index], "%d%n", &product, &n);
- if(n == 0 || 4 < n)
- return NULL;
- state->input_index += n;
- tm->tm_year = product - 1900;
- state->has_year = true;
- state->has_century = true;
- state->full_year_given = true;
- state->century = product / 100;
- break;
- }
- case 'F': { //GNU extensions
- //equivalent to `%Y-%m-%d`
- size_t pre_fi = state->format_index;
- state->format_index = 0;
-
- char *result = strptime_internal(input, "%Y-%m-%d", tm, state);
- if(result == NULL)
- return NULL;
-
- state->format_index = pre_fi;
- break;
- }
- case 'g':
- __ensure(!"strptime() %g directive unimplemented.");
- __builtin_unreachable();
- break;
- case 'G':
- __ensure(!"strptime() %G directive unimplemented.");
- __builtin_unreachable();
- break;
- case 'u': {
- if(!matchNumericRange(1, 7, tm->tm_wday, nullptr))
- return NULL;
- tm->tm_wday--;
- break;
- }
- case 'V':
- __ensure(!"strptime() %V directive unimplemented.");
- __builtin_unreachable();
- break;
- case 'z':
- __ensure(!"strptime() %z directive unimplemented.");
- __builtin_unreachable();
- break;
- case 'Z':
- __ensure(!"strptime() %Z directive unimplemented.");
- __builtin_unreachable();
- break;
- case 's': //end of GNU extensions
- __ensure(!"strptime() %s directive unimplemented.");
- __builtin_unreachable();
- break;
- case 'E': { //locale-dependent date & time representation
- __ensure(!"strptime() %E* directives unimplemented.");
- __builtin_unreachable();
- /*
- state->format_index++;
- switch(format[state->format_index]){
- case 'c':
- break;
- case 'C':
- break;
- case 'x':
- break;
- case 'X':
- break;
- case 'y':
- break;
- case 'Y':
- break;
- default:
- return NULL;
- }
- */
- }
- case 'O': { //locale-dependent numeric symbols
- __ensure(!"strptime() %O* directives unimplemented.");
- __builtin_unreachable();
- /*
- state->format_index++;
- switch(format[state->format_index]){
- case 'd':
- case 'e':
- break;
- case 'H':
- break;
- case 'I':
- break;
- case 'm':
- break;
- case 'M':
- break;
- case 'S':
- break;
- case 'U':
- break;
- case 'w':
- break;
- case 'W':
- break;
- case 'y':
- break;
- default:
- return NULL;
- }
- */
- }
- default:
- return NULL;
- }
- state->format_index++;
- }
-
- return (char*)input + state->input_index;
-}
-
-} //anonymous namespace
-
-char *strptime(const char *__restrict s, const char *__restrict format, struct tm *__restrict tm){
- struct strptime_internal_state state = {};
-
- char *result = strptime_internal(s, format, tm, &state);
-
- if(result == NULL)
- return NULL;
-
- if(state.has_century && !state.full_year_given){
- int full_year = state.century * 100;
-
- if(state.has_year){
- //Compensate for default century-adjustment of `%j` operand
- if(tm->tm_year >= 100)
- full_year += tm->tm_year - 100;
- else
- full_year += tm->tm_year;
- }
-
- tm->tm_year = full_year - 1900;
-
- state.has_year = true;
- }
-
- if(state.has_month && !state.has_day_of_year){
- int day = 0;
- if(state.has_year)
- day = month_and_year_to_day_in_year(tm->tm_mon, tm->tm_year);
- else
- day = month_to_day(tm->tm_mon);
-
- tm->tm_yday = day + tm->tm_mday - 1;
- state.has_day_of_year = true;
- }
-
- if(state.has_year && !state.has_day_of_week){
- if(!state.has_month && !state.has_day_of_month){
- tm->tm_wday = day_determination(0, 0, tm->tm_year + 1900);
- }
- else if(state.has_month && state.has_day_of_month){
- tm->tm_wday = day_determination(tm->tm_mday, tm->tm_mon, tm->tm_year + 1900);
- }
- state.has_day_of_week = true;
- }
-
- return result;
-}
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