add fmt_human, fmt_humank and fmt_httpdate
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a3b08eb5e5
commit
40bba8865b
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.TH fmt_httpdate 3
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.SH NAME
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fmt_httpdate \- write a date in ASCII as in the HTTP protocol
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.SH SYNTAX
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.B #include <fmt.h>
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unsigned int \fBfmt_httpdate\fP(char *\fIdest\fR,time_t \fIsource\fR);
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.SH DESCRIPTION
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fmt_httpdate writes a date in ASCII representation as the HTTP protocol defines it:
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"Sun, 06 Nov 1994 08:49:37 GMT".
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fmt_httpdate does not append \\0.
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If \fIdest\fR equals FMT_LEN (i.e. is zero), fmt_httpdate returns the number
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of bytes it would have written.
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The output of fmt_httpdate is 29 until Jan 1st 10000.
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#include "fmt.h"
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#include "byte.h"
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#include <time.h>
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static unsigned int fmt_2digits(char* dest,int i) {
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dest[0]=(i/10)+'0';
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dest[1]=(i%10)+'0';
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return 2;
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}
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unsigned int fmt_httpdate(char* dest,time_t t) {
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static const char days[] = "SunMonTueWedThuFriSat";
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static const char months[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
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struct tm* x=gmtime(&t);
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int i;
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if (dest==0) return 29;
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/* "Sun, 06 Nov 1994 08:49:37 GMT" */
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byte_copy(dest,3,days+3*x->tm_wday); i=3;
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i+=fmt_str(dest+i,", ");
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i+=fmt_2digits(dest+i,x->tm_mday);
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i+=fmt_str(dest+i," ");
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byte_copy(dest+i,3,months+3*x->tm_mon); i+=3;
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i+=fmt_str(dest+i," ");
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i+=fmt_2digits(dest+i,(x->tm_year+1900)/100);
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i+=fmt_2digits(dest+i,(x->tm_year+1900)%100);
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i+=fmt_str(dest+i," ");
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i+=fmt_2digits(dest+i,x->tm_hour);
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i+=fmt_str(dest+i,":");
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i+=fmt_2digits(dest+i,x->tm_min);
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i+=fmt_str(dest+i,":");
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i+=fmt_2digits(dest+i,x->tm_sec);
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i+=fmt_str(dest+i," GMT");
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return i;
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}
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.TH fmt_human 3
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.SH NAME
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fmt_human \- write a human readable ASCII representation of a long integer
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.SH SYNTAX
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.B #include <fmt.h>
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unsigned int \fBfmt_human\fP(char *\fIdest\fR,unsigned long long \fIsource\fR);
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.SH DESCRIPTION
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fmt_human writes a human readable ASCII representation of \fIsource\fR
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to \fIdest\fR and returns the number of bytes written. The result
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resembles the file size output of "ls -H"; 1000 becomes "1.0k", 1000000
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becomes "1.0M" and so on for "G" and "T".
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fmt_human does not append \\0.
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If \fIdest\fR equals FMT_LEN (i.e. is zero), fmt_human returns the number
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of bytes it would have written.
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The output of fmt_human can not exceed 11 (assuming unsigned long long
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has 64 bits).
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.SH "SEE ALSO"
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fmt_humank(3), scan_human(3)
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.TH fmt_humank 3
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.SH NAME
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fmt_humank \- write a human readable ASCII representation of a long integer
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.SH SYNTAX
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.B #include <fmt.h>
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unsigned int \fBfmt_humank\fP(char *\fIdest\fR,unsigned long long \fIsource\fR);
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.SH DESCRIPTION
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fmt_humank writes a human readable ASCII representation of \fIsource\fR
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to \fIdest\fR and returns the number of bytes written. The result
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resembles the file size output of "ls -h"; 1024 becomes "1.0k", 1048576
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becomes "1.0M" and so on for "G" and "T".
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fmt_humank does not append \\0.
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If \fIdest\fR equals FMT_LEN (i.e. is zero), fmt_humank returns the number
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of bytes it would have written.
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The output of fmt_humank can not exceed 11 (assuming unsigned long long
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has 64 bits).
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.SH "SEE ALSO"
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fmt_human(3), scan_humank(3)
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#include <time.h>
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#include <buffer.h>
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main() {
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char buf[100];
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buffer_put(buffer_1,buf,fmt_httpdate(buf,time(0)));
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buffer_putnlflush(buffer_1);
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}
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@ -0,0 +1,10 @@
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#include <fmt.h>
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#include <buffer.h>
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main() {
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char buf[1024];
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buffer_put(buffer_1,buf,fmt_human(buf,1)); buffer_putnlflush(buffer_1);
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buffer_put(buffer_1,buf,fmt_human(buf,1400)); buffer_putnlflush(buffer_1);
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buffer_put(buffer_1,buf,fmt_human(buf,2300000)); buffer_putnlflush(buffer_1);
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buffer_put(buffer_1,buf,fmt_human(buf,(unsigned long long)(-1ll))); buffer_putnlflush(buffer_1);
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}
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