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Diffstat (limited to 'butl/strptime.c')
| -rw-r--r-- | butl/strptime.c | 629 |
1 files changed, 0 insertions, 629 deletions
diff --git a/butl/strptime.c b/butl/strptime.c deleted file mode 100644 index 8bbfac5..0000000 --- a/butl/strptime.c +++ /dev/null @@ -1,629 +0,0 @@ -/*- - * Copyright (c) 2014 Gary Mills - * Copyright 2011, Nexenta Systems, Inc. All rights reserved. - * Copyright (c) 1994 Powerdog Industries. All rights reserved. - * - * Copyright (c) 2011 The FreeBSD Foundation - * All rights reserved. - * Portions of this software were developed by David Chisnall - * under sponsorship from the FreeBSD Foundation. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * - * THIS SOFTWARE IS PROVIDED BY POWERDOG INDUSTRIES ``AS IS'' AND ANY - * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE POWERDOG INDUSTRIES BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR - * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, - * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE - * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, - * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * The views and conclusions contained in the software and documentation - * are those of the authors and should not be interpreted as representing - * official policies, either expressed or implied, of Powerdog Industries. - */ - -// Fallback implementation of strptime() designed for Windows/gcc combination -// when neither POSIX strptime() nor proper std::get_time() are available. No -// locale support is provided, so the function works as if "C" locale is set. -// FreeBSD libc strptime.c source file is taken as a basis (saved in -// strptime.orig). POSIX non-compliant extensions are removed. Most of -// #include directives are removed as reference internal headers, some -// #define directives are added instead. The content of included -// timelocal.{h,c} files is mostly commented out, having just required -// lc_time_T struct and _C_time_locale constant definitions left. Otherwise the -// code is kept untouched as much as possible. -// - -#include <ctype.h> // isspace(), isdigit() -#include <string.h> // _strnicmp() - -#include "timelocal.h" // lc_time_T -#include "timelocal.c" // _C_time_locale - -#define isspace_l(c, l) isspace(c) -#define isdigit_l(c, l) isdigit(c) -#define strncasecmp_l(s1, s2, n, l) _strnicmp(s1, s2, n) - -#define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0) -#define FIX_LOCALE(l) l=l - -#define TM_YEAR_BASE 1900 -#define TM_SUNDAY 0 -#define TM_MONDAY 1 - -typedef unsigned char u_char; - -// Stubs replacing the real locale support. -// -typedef const lc_time_T* locale_t; - -static locale_t -__get_locale () -{ - return &_C_time_locale; -} - -static const struct lc_time_T * -__get_current_time_locale (locale_t l) -{ - return l; -} - -// From this point the code is unchanged, if not to count non-standard -// specifiers support removal and the replacement of tabs with spaces. -// -static char * -_strptime(const char *, const char *, struct tm *, int *, locale_t); - -#define asizeof(a) ((int)(sizeof(a) / sizeof((a)[0]))) - -#define FLAG_NONE (1 << 0) -#define FLAG_YEAR (1 << 1) -#define FLAG_MONTH (1 << 2) -#define FLAG_YDAY (1 << 3) -#define FLAG_MDAY (1 << 4) -#define FLAG_WDAY (1 << 5) - -/* - * Calculate the week day of the first day of a year. Valid for - * the Gregorian calendar, which began Sept 14, 1752 in the UK - * and its colonies. Ref: - * http://en.wikipedia.org/wiki/Determination_of_the_day_of_the_week - */ - -static int -first_wday_of(int year) -{ - return (((2 * (3 - (year / 100) % 4)) + (year % 100) + - ((year % 100) / 4) + (isleap(year) ? 6 : 0) + 1) % 7); -} - -// Remove Glibc extensions (%F, %Z, %z, %s) to make implementation compliant -// with POSIX strptime() and to simplify porting. -// -static char * -_strptime(const char *buf, const char *fmt, struct tm *tm, int *GMTp, - locale_t locale) -{ - char c; - const char *ptr; - int day_offset = -1, wday_offset; - int week_offset; - int i, len; - int flags; - int Ealternative, Oalternative; - const struct lc_time_T *tptr = __get_current_time_locale(locale); - static int start_of_month[2][13] = { - {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365}, - {0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366} - }; - - flags = FLAG_NONE; - - ptr = fmt; - while (*ptr != 0) { - c = *ptr++; - - if (c != '%') { - if (isspace_l((unsigned char)c, locale)) - while (*buf != 0 && - isspace_l((unsigned char)*buf, locale)) - buf++; - else if (c != *buf++) - return (NULL); - continue; - } - - // Skip according to - // http://pubs.opengroup.org/onlinepubs/9699919799/functions/strptime.html - // - c = *ptr; - if (c == '+' || c == '0') - ptr++; - - Ealternative = 0; - Oalternative = 0; -label: - c = *ptr++; - switch (c) { - case '%': - if (*buf++ != '%') - return (NULL); - break; - - case 'C': - if (!isdigit_l((unsigned char)*buf, locale)) - return (NULL); - - /* XXX This will break for 3-digit centuries. */ - len = 2; - for (i = 0; len && *buf != 0 && - isdigit_l((unsigned char)*buf, locale); buf++) { - i *= 10; - i += *buf - '0'; - len--; - } - if (i < 19) - return (NULL); - - tm->tm_year = i * 100 - TM_YEAR_BASE; - flags |= FLAG_YEAR; - - break; - - case 'c': - buf = _strptime(buf, tptr->c_fmt, tm, GMTp, locale); - if (buf == NULL) - return (NULL); - flags |= FLAG_WDAY | FLAG_MONTH | FLAG_MDAY | FLAG_YEAR; - break; - - case 'D': - buf = _strptime(buf, "%m/%d/%y", tm, GMTp, locale); - if (buf == NULL) - return (NULL); - flags |= FLAG_MONTH | FLAG_MDAY | FLAG_YEAR; - break; - - case 'E': - if (Ealternative || Oalternative) - break; - Ealternative++; - goto label; - - case 'O': - if (Ealternative || Oalternative) - break; - Oalternative++; - goto label; - - case 'R': - buf = _strptime(buf, "%H:%M", tm, GMTp, locale); - if (buf == NULL) - return (NULL); - break; - - case 'r': - buf = _strptime(buf, tptr->ampm_fmt, tm, GMTp, locale); - if (buf == NULL) - return (NULL); - break; - - case 'T': - buf = _strptime(buf, "%H:%M:%S", tm, GMTp, locale); - if (buf == NULL) - return (NULL); - break; - - case 'X': - buf = _strptime(buf, tptr->X_fmt, tm, GMTp, locale); - if (buf == NULL) - return (NULL); - break; - - case 'x': - buf = _strptime(buf, tptr->x_fmt, tm, GMTp, locale); - if (buf == NULL) - return (NULL); - flags |= FLAG_MONTH | FLAG_MDAY | FLAG_YEAR; - break; - - case 'j': - if (!isdigit_l((unsigned char)*buf, locale)) - return (NULL); - - len = 3; - for (i = 0; len && *buf != 0 && - isdigit_l((unsigned char)*buf, locale); buf++){ - i *= 10; - i += *buf - '0'; - len--; - } - if (i < 1 || i > 366) - return (NULL); - - tm->tm_yday = i - 1; - flags |= FLAG_YDAY; - - break; - - case 'M': - case 'S': - if (*buf == 0 || - isspace_l((unsigned char)*buf, locale)) - break; - - if (!isdigit_l((unsigned char)*buf, locale)) - return (NULL); - - len = 2; - for (i = 0; len && *buf != 0 && - isdigit_l((unsigned char)*buf, locale); buf++){ - i *= 10; - i += *buf - '0'; - len--; - } - - if (c == 'M') { - if (i > 59) - return (NULL); - tm->tm_min = i; - } else { - if (i > 60) - return (NULL); - tm->tm_sec = i; - } - - break; - - case 'H': - case 'I': - case 'k': - case 'l': - /* - * Of these, %l is the only specifier explicitly - * documented as not being zero-padded. However, - * there is no harm in allowing zero-padding. - * - * XXX The %l specifier may gobble one too many - * digits if used incorrectly. - */ - if (!isdigit_l((unsigned char)*buf, locale)) - return (NULL); - - len = 2; - for (i = 0; len && *buf != 0 && - isdigit_l((unsigned char)*buf, locale); buf++) { - i *= 10; - i += *buf - '0'; - len--; - } - if (c == 'H' || c == 'k') { - if (i > 23) - return (NULL); - } else if (i > 12) - return (NULL); - - tm->tm_hour = i; - - break; - - case 'p': - /* - * XXX This is bogus if parsed before hour-related - * specifiers. - */ - len = strlen(tptr->am); - if (strncasecmp_l(buf, tptr->am, len, locale) == 0) { - if (tm->tm_hour > 12) - return (NULL); - if (tm->tm_hour == 12) - tm->tm_hour = 0; - buf += len; - break; - } - - len = strlen(tptr->pm); - if (strncasecmp_l(buf, tptr->pm, len, locale) == 0) { - if (tm->tm_hour > 12) - return (NULL); - if (tm->tm_hour != 12) - tm->tm_hour += 12; - buf += len; - break; - } - - return (NULL); - - case 'A': - case 'a': - for (i = 0; i < asizeof(tptr->weekday); i++) { - len = strlen(tptr->weekday[i]); - if (strncasecmp_l(buf, tptr->weekday[i], - len, locale) == 0) - break; - len = strlen(tptr->wday[i]); - if (strncasecmp_l(buf, tptr->wday[i], - len, locale) == 0) - break; - } - if (i == asizeof(tptr->weekday)) - return (NULL); - - buf += len; - tm->tm_wday = i; - flags |= FLAG_WDAY; - break; - - case 'U': - case 'W': - /* - * XXX This is bogus, as we can not assume any valid - * information present in the tm structure at this - * point to calculate a real value, so just check the - * range for now. - */ - if (!isdigit_l((unsigned char)*buf, locale)) - return (NULL); - - len = 2; - for (i = 0; len && *buf != 0 && - isdigit_l((unsigned char)*buf, locale); buf++) { - i *= 10; - i += *buf - '0'; - len--; - } - if (i > 53) - return (NULL); - - if (c == 'U') - day_offset = TM_SUNDAY; - else - day_offset = TM_MONDAY; - - - week_offset = i; - - break; - - case 'w': - if (!isdigit_l((unsigned char)*buf, locale)) - return (NULL); - - i = *buf - '0'; - if (i > 6) - return (NULL); - - tm->tm_wday = i; - flags |= FLAG_WDAY; - - break; - - case 'e': - /* - * With %e format, our strftime(3) adds a blank space - * before single digits. - */ - if (*buf != 0 && - isspace_l((unsigned char)*buf, locale)) - buf++; - /* FALLTHROUGH */ - case 'd': - /* - * The %e specifier was once explicitly documented as - * not being zero-padded but was later changed to - * equivalent to %d. There is no harm in allowing - * such padding. - * - * XXX The %e specifier may gobble one too many - * digits if used incorrectly. - */ - if (!isdigit_l((unsigned char)*buf, locale)) - return (NULL); - - len = 2; - for (i = 0; len && *buf != 0 && - isdigit_l((unsigned char)*buf, locale); buf++) { - i *= 10; - i += *buf - '0'; - len--; - } - if (i > 31) - return (NULL); - - tm->tm_mday = i; - flags |= FLAG_MDAY; - - break; - - case 'B': - case 'b': - case 'h': - for (i = 0; i < asizeof(tptr->month); i++) { - if (Oalternative) { - if (c == 'B') { - len = strlen(tptr->alt_month[i]); - if (strncasecmp_l(buf, - tptr->alt_month[i], - len, locale) == 0) - break; - } - } else { - len = strlen(tptr->month[i]); - if (strncasecmp_l(buf, tptr->month[i], - len, locale) == 0) - break; - } - } - /* - * Try the abbreviated month name if the full name - * wasn't found and Oalternative was not requested. - */ - if (i == asizeof(tptr->month) && !Oalternative) { - for (i = 0; i < asizeof(tptr->month); i++) { - len = strlen(tptr->mon[i]); - if (strncasecmp_l(buf, tptr->mon[i], - len, locale) == 0) - break; - } - } - if (i == asizeof(tptr->month)) - return (NULL); - - tm->tm_mon = i; - buf += len; - flags |= FLAG_MONTH; - - break; - - case 'm': - if (!isdigit_l((unsigned char)*buf, locale)) - return (NULL); - - len = 2; - for (i = 0; len && *buf != 0 && - isdigit_l((unsigned char)*buf, locale); buf++) { - i *= 10; - i += *buf - '0'; - len--; - } - if (i < 1 || i > 12) - return (NULL); - - tm->tm_mon = i - 1; - flags |= FLAG_MONTH; - - break; - - case 'Y': - case 'y': - if (*buf == 0 || - isspace_l((unsigned char)*buf, locale)) - break; - - if (!isdigit_l((unsigned char)*buf, locale)) - return (NULL); - - len = (c == 'Y') ? 4 : 2; - for (i = 0; len && *buf != 0 && - isdigit_l((unsigned char)*buf, locale); buf++) { - i *= 10; - i += *buf - '0'; - len--; - } - if (c == 'Y') - i -= TM_YEAR_BASE; - if (c == 'y' && i < 69) - i += 100; - if (i < 0) - return (NULL); - - tm->tm_year = i; - flags |= FLAG_YEAR; - - break; - - case 'n': - case 't': - while (isspace_l((unsigned char)*buf, locale)) - buf++; - break; - - default: - return (NULL); - } - } - - if (!(flags & FLAG_YDAY) && (flags & FLAG_YEAR)) { - if ((flags & (FLAG_MONTH | FLAG_MDAY)) == - (FLAG_MONTH | FLAG_MDAY)) { - tm->tm_yday = start_of_month[isleap(tm->tm_year + - TM_YEAR_BASE)][tm->tm_mon] + (tm->tm_mday - 1); - flags |= FLAG_YDAY; - } else if (day_offset != -1) { - /* Set the date to the first Sunday (or Monday) - * of the specified week of the year. - */ - if (!(flags & FLAG_WDAY)) { - tm->tm_wday = day_offset; - flags |= FLAG_WDAY; - } - tm->tm_yday = (7 - - first_wday_of(tm->tm_year + TM_YEAR_BASE) + - day_offset) % 7 + (week_offset - 1) * 7 + - tm->tm_wday - day_offset; - flags |= FLAG_YDAY; - } - } - - if ((flags & (FLAG_YEAR | FLAG_YDAY)) == (FLAG_YEAR | FLAG_YDAY)) { - if (!(flags & FLAG_MONTH)) { - i = 0; - while (tm->tm_yday >= - start_of_month[isleap(tm->tm_year + - TM_YEAR_BASE)][i]) - i++; - if (i > 12) { - i = 1; - tm->tm_yday -= - start_of_month[isleap(tm->tm_year + - TM_YEAR_BASE)][12]; - tm->tm_year++; - } - tm->tm_mon = i - 1; - flags |= FLAG_MONTH; - } - if (!(flags & FLAG_MDAY)) { - tm->tm_mday = tm->tm_yday - - start_of_month[isleap(tm->tm_year + TM_YEAR_BASE)] - [tm->tm_mon] + 1; - flags |= FLAG_MDAY; - } - if (!(flags & FLAG_WDAY)) { - i = 0; - wday_offset = first_wday_of(tm->tm_year); - while (i++ <= tm->tm_yday) { - if (wday_offset++ >= 6) - wday_offset = 0; - } - tm->tm_wday = wday_offset; - flags |= FLAG_WDAY; - } - } - - return ((char *)buf); -} - -static char * -strptime_l(const char * __restrict buf, const char * __restrict fmt, - struct tm * __restrict tm, locale_t loc) -{ - char *ret; - int gmt; - FIX_LOCALE(loc); - - gmt = 0; - ret = _strptime(buf, fmt, tm, &gmt, loc); - - return (ret); -} - -static char * -strptime(const char * __restrict buf, const char * __restrict fmt, - struct tm * __restrict tm) -{ - return strptime_l(buf, fmt, tm, __get_locale()); -} |