diff options
Diffstat (limited to 'mdk-stage1/dietlibc/libugly/strftime.c')
| -rw-r--r-- | mdk-stage1/dietlibc/libugly/strftime.c | 284 |
1 files changed, 110 insertions, 174 deletions
diff --git a/mdk-stage1/dietlibc/libugly/strftime.c b/mdk-stage1/dietlibc/libugly/strftime.c index b7e750ab1..365d0c84f 100644 --- a/mdk-stage1/dietlibc/libugly/strftime.c +++ b/mdk-stage1/dietlibc/libugly/strftime.c @@ -1,182 +1,118 @@ #include <sys/types.h> #include <time.h> - -static char *sweekdays[]={"Sun","Mon","Tue","Wed","Thu","Fri","Sat"}; -static char *weekdays[]={"Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"}; -static char *smonths[]={"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"}; -static char *months[]={"January","February","March","April","May","June","July","August","September","October","November","December"}; -static char *ampm[]={"am","pm","AM","PM"}; - -static int i2a(char* dest,unsigned int x) { - register unsigned int tmp=x; - register int len=0; - *dest++=tmp/10+'0'; tmp=tmp%10; ++len; - *dest++=tmp+'0'; - return 2; +#include "dietfeatures.h" + +static const char sweekdays [7] [4] = { + "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" +}; +static const char weekdays [7] [10] = { + "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" +}; +static const char smonths [12] [4] = { + "Jan", "Feb", "Mar", "Apr", "May", "Jun", + "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" +}; +static const char* months [12] = { + "January", "February", "March", "April", smonths[5-1], "June", + "July", "August", "September", "October", "November", "December" +}; +static const char ampm [4] [3] = { + "am", "pm", + "AM", "PM" +}; + +static int i2a ( char* dest,unsigned int x ) +{ + int div = 10; + *dest++ = x/div + '0'; + *dest++ = x%div + '0'; + *dest++ = '\0'; + return 2; } -static int i2as(char* dest,unsigned int x) { - int len=i2a(dest,x); - if (*dest=='0') *dest=' '; - return len; -} - -size_t strftime(char *s, size_t max, const char *format, const struct tm *tm) { - char *t=s; - const char *src; - char buf[5]; - while (*format) { - switch (*format) { - case 0: break; - case '%': - switch (*++format) { - case '%': *t='%'; ++t; break; - case 'a': src=sweekdays[tm->tm_wday]; goto append; - case 'A': src=weekdays[tm->tm_wday]; goto append; - case 'h': - case 'b': src=smonths[tm->tm_mon]; goto append; - case 'B': src=months[tm->tm_mon]; goto append; - case 'c': t+=strftime(t,max-(t-s),"%b %a %d %k:%M:%S %Z %Y",tm); break; - case 'C': buf[i2a(buf,(tm->tm_year+1900)/100)]=0; src=buf; goto append; - case 'd': buf[i2a(buf,tm->tm_mday)]=0; src=buf; goto append; - case 'e': buf[i2as(buf,tm->tm_mday)]=0; src=buf; goto append; - case 'H': buf[i2a(buf,tm->tm_hour)]=0; src=buf; goto append; - case 'I': buf[i2a(buf,tm->tm_hour%12)]=0; src=buf; goto append; - case 'j': buf[i2a(buf,tm->tm_yday)]=0; src=buf; goto append; - case 'k': buf[i2as(buf,tm->tm_hour)]=0; src=buf; goto append; - case 'l': buf[i2as(buf,tm->tm_hour%12)]=0; src=buf; goto append; - case 'm': buf[i2a(buf,tm->tm_mon+1)]=0; src=buf; goto append; - case 'M': buf[i2a(buf,tm->tm_min)]=0; src=buf; goto append; - case 'n': *t='\n'; break; - case 'p': src=ampm[tm->tm_hour>11?3:2]; goto append; - case 'P': src=ampm[tm->tm_hour>11?1:0]; goto append; - case 'r': t+=strftime(t,max-(t-s),"%I:%M:%S %p",tm); break; - case 'R': t+=strftime(t,max-(t-s),"%H:%M",tm); break; - case 'S': buf[i2a(buf,tm->tm_sec)]=0; src=buf; goto append; - case 't': *t='\t'; break; - case 'T': t+=strftime(t,max-(t-s),"%H:%M:%S",tm); break; - case 'u': buf[i2a(buf,tm->tm_wday?tm->tm_wday:7)]=0; src=buf; goto append; - case 'w': buf[i2a(buf,tm->tm_wday)]=0; src=buf; goto append; - case 'x': t+=strftime(t,max-(t-s),"%b %a %d",tm); break; - case 'X': t+=strftime(t,max-(t-s),"%k:%M:%S",tm); break; - case 'y': buf[i2a(buf,tm->tm_year%100)]=0; src=buf; goto append; - case 'Y': i2a(buf,(tm->tm_year+1900)/100); buf[i2a(buf+2,(tm->tm_year%100))+2]=0; src=buf; goto append; - case 'Z': src="GMT"; goto append; /* hehe */ -append: - while (*src && t<s+max) { *t=*src; ++t; ++src; } - }; - break; - default: - *t=*format; ++t; +size_t strftime ( char* dst, size_t max, const char* format, const struct tm* tm ) +{ + char* p = dst; + const char* src; + unsigned int no; + char buf [5]; + + + for ( ; *format != '\0'; format++ ) { + if (*format == '%') { + if (*++format == '%') { + *p++ = '%'; + } + else +again: + switch (*format) { +// case '%': *p++ = '%'; break; // reduce size of jump table + case 'n': *p++ = '\n'; break; + case 't': *p++ = '\t'; break; + case 'O': case 'E': ++format; goto again; + case 'c': src = "%b %a %d %k:%M:%S %Z %Y"; goto _strf; + case 'r': src = "%I:%M:%S %p"; goto _strf; + case 'R': src = "%H:%M"; goto _strf; + case 'x': src = "%b %a %d"; goto _strf; + case 'X': src = "%k:%M:%S"; goto _strf; + case 'D': src = "%m/%d/%y"; goto _strf; + case 'T': src = "%H:%M:%S"; + _strf: p += strftime (p, (size_t)(dst+max-p), src, tm); break; + case 'a': src = sweekdays [tm->tm_wday]; goto _str; + case 'A': src = weekdays [tm->tm_wday]; goto _str; + case 'h': + case 'b': src = smonths [tm->tm_mon]; goto _str; + case 'B': src = months [tm->tm_mon]; goto _str; + case 'p': src = ampm [tm->tm_hour > 12 ? 3 : 2]; goto _str; + case 'P': src = ampm [tm->tm_hour > 12 ? 1 : 0]; goto _str; + case 'C': no = tm->tm_year/100 + 19; goto _no; + case 'd': no = tm->tm_mday; goto _no; + case 'e': no = tm->tm_mday; goto _nos; + case 'H': no = tm->tm_hour; goto _no; + case 'I': no = tm->tm_hour % 12; goto _no; + case 'j': no = tm->tm_yday; goto _no; + case 'k': no = tm->tm_hour; goto _nos; + case 'l': no = tm->tm_hour % 12; goto _nos; + case 'm': no = tm->tm_mon + 1; goto _no; + case 'M': no = tm->tm_min; goto _no; + case 'S': no = tm->tm_sec; goto _no; + case 'u': no = tm->tm_wday ? tm->tm_wday : 7; goto _no; + case 'w': no = tm->tm_wday; goto _no; + case 'U': no = (tm->tm_yday - tm->tm_wday + 7) / 7; goto _no; + case 'W': no = (tm->tm_yday - (tm->tm_wday - 1 + 7) % 7 + 7) / 7; goto _no; + case 'Z': +#ifdef WANT_TZFILE_PARSER + tzset(); src = tzname[0]; +#else + src = "[unknown timezone]"; +#endif + goto _str; + case 'Y': i2a ( buf+0, (unsigned int)(tm->tm_year / 100 + 19) ); + i2a ( buf+2, (unsigned int)(tm->tm_year % 100) ); + src = buf; + goto _str; + case 'y': no = tm->tm_year % 100; goto _no; + _no: i2a ( buf, no ); /* append number 'no' */ + src = buf; + goto _str; + _nos: i2a ( buf, no ); /* the same, but '0'->' ' */ + if (buf[0] == '0') + buf[0] = ' '; + src = buf; + _str: while (*src && p < dst+max) /* append string */ + *p++ = *src++; + break; + }; + } else { + *p++ = *format; + } + + if (p >= dst+max) + break; } - ++format; - if (t>=s+max) break; - continue; - } - *t=0; return t-s; + + *p = '\0'; + return p - dst; } - -/* - %u The day of the week as a decimal, range 1 to 7, - Monday being 1. See also %w. (SU) - - %U The week number of the current year as a decimal - number, range 00 to 53, starting with the first - Sunday as the first day of week 01. See also %V and - %W. - - %V The ISO 8601:1988 week number of the current year - as a decimal number, range 01 to 53, where week 1 - is the first week that has at least 4 days in the - current year, and with Monday as the first day of - the week. See also %U and %W. (SU) - - %w The day of the week as a decimal, range 0 to 6, - Sunday being 0. See also %u. - - %W The week number of the current year as a decimal - number, range 00 to 53, starting with the first - Monday as the first day of week 01. - - %x The preferred date representation for the current - locale without the time. - - %X The preferred time representation for the current - locale without the date. - - %y The year as a decimal number without a century - (range 00 to 99). - - %Y The year as a decimal number including the century. - - %z The time-zone as hour offset from GMT. Required to - emit RFC822-conformant dates (using "%a, %d %b %Y - %H:%M:%S %z"). (GNU) - - %Z The time zone or name or abbreviation. - - %+ The date and time in date(1) format. (TZ) - - %% A literal `%' character. - - Some conversion specifiers can be modified by preceding - them by the E or O modifier to indicate that an alterna - tive format should be used. If the alternative format or - specification does not exist for the current locale, the - behaviour will be as if the unmodified conversion specifi - cation were used. (SU) The Single Unix Specification men - tions %Ec, %EC, %Ex, %EX, %Ry, %EY, %Od, %Oe, %OH, %OI, - %Om, %OM, %OS, %Ou, %OU, %OV, %Ow, %OW, %Oy, where the - effect of the O modifier is to use alternative numeric - symbols (say, roman numerals), and that of the E modifier - - - -GNU 29 March 1999 3 - - - - - -STRFTIME(3) Linux Programmer's Manual STRFTIME(3) - - - is to use a locale-dependent alternative representation. - - The broken-down time structure tm is defined in <time.h>. - See also ctime(3). - - -RETURN VALUE - The strftime() function returns the number of characters - placed in the array s, not including the terminating NUL - character, provided the string, including the terminating - NUL, fits. Otherwise, it returns 0, and the contents of - the array is undefined. (Thus at least since libc 4.4.4; - very old versions of libc, such as libc 4.4.1, would - return max if the array was too small.) - - Note that the return value 0 does not necessarily indicate - an error; for example, in many locales %p yields an empty - string. - -ENVIRONMENT - The environment variables TZ and LC_TIME are used. - -CONFORMING TO - ANSI C, SVID 3, ISO 9899. There are strict inclusions - between the set of conversions given in ANSI C (unmarked), - those given in the Single Unix Specification (marked SU), - those given in Olson's timezone package (marked TZ), and - those given in glibc (marked GNU), except that %+ is not - supported in glibc2. On the other hand glibc2 has several - more extensions. POSIX.1 only refers to ANSI C; POSIX.2 - describes under date(1) several extensions that could - apply to strftime as well. - -SEE ALSO - date(1), time(2), ctime(3), setlocale(3), sprintf(3) - -*/ |