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103 lines
3.8 KiB
C
103 lines
3.8 KiB
C
/* this header file comes from libowfat, http://www.fefe.de/libowfat/ */
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#ifndef FMT_H
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#define FMT_H
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/* for size_t: */
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#include <stddef.h>
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/* for time_t: */
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#include <sys/types.h>
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#define FMT_LONG 41 /* enough space to hold -2^127 in decimal, plus \0 */
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#define FMT_ULONG 40 /* enough space to hold 2^128 - 1 in decimal, plus \0 */
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#define FMT_8LONG 44 /* enough space to hold 2^128 - 1 in octal, plus \0 */
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#define FMT_XLONG 33 /* enough space to hold 2^128 - 1 in hexadecimal, plus \0 */
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#define FMT_LEN ((char *) 0) /* convenient abbreviation */
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/* The formatting routines do not append \0!
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* Use them like this: buf[fmt_ulong(buf,number)]=0; */
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/* convert signed src integer -23 to ASCII '-','2','3', return length.
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* If dest is not NULL, write result to dest */
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size_t fmt_long(char *dest,signed long src);
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/* convert unsigned src integer 23 to ASCII '2','3', return length.
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* If dest is not NULL, write result to dest */
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size_t fmt_ulong(char *dest,unsigned long src);
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/* convert unsigned src integer 0x23 to ASCII '2','3', return length.
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* If dest is not NULL, write result to dest */
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size_t fmt_xlong(char *dest,unsigned long src);
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/* convert unsigned src integer 023 to ASCII '2','3', return length.
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* If dest is not NULL, write result to dest */
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size_t fmt_8long(char *dest,unsigned long src);
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size_t fmt_longlong(char *dest,signed long long src);
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size_t fmt_ulonglong(char *dest,unsigned long long src);
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size_t fmt_xlonglong(char *dest,unsigned long long src);
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#define fmt_uint(dest,src) fmt_ulong(dest,src)
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#define fmt_int(dest,src) fmt_long(dest,src)
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#define fmt_xint(dest,src) fmt_xlong(dest,src)
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#define fmt_8int(dest,src) fmt_8long(dest,src)
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/* Like fmt_ulong, but prepend '0' while length is smaller than padto.
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* Does not truncate! */
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size_t fmt_ulong0(char *,unsigned long src,size_t padto);
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#define fmt_uint0(buf,src,padto) fmt_ulong0(buf,src,padto)
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/* convert src double 1.7 to ASCII '1','.','7', return length.
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* If dest is not NULL, write result to dest */
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size_t fmt_double(char *dest, double d,int max,int prec);
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/* if src is negative, write '-' and return 1.
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* if src is positive, write '+' and return 1.
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* otherwise return 0 */
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size_t fmt_plusminus(char *dest,int src);
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/* if src is negative, write '-' and return 1.
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* otherwise return 0. */
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size_t fmt_minus(char *dest,int src);
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/* copy str to dest until \0 byte, return number of copied bytes. */
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size_t fmt_str(char *dest,const char *src);
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/* copy str to dest until \0 byte or limit bytes copied.
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* return number of copied bytes. */
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size_t fmt_strn(char *dest,const char *src,size_t limit);
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/* "foo" -> " foo"
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* write padlen-srclen spaces, if that is >= 0. Then copy srclen
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* characters from src. Truncate only if total length is larger than
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* maxlen. Return number of characters written. */
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size_t fmt_pad(char* dest,const char* src,size_t srclen,size_t padlen,size_t maxlen);
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/* "foo" -> "foo "
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* append padlen-srclen spaces after dest, if that is >= 0. Truncate
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* only if total length is larger than maxlen. Return number of
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* characters written. */
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size_t fmt_fill(char* dest,size_t srclen,size_t padlen,size_t maxlen);
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/* 1 -> "1", 4900 -> "4.9k", 2300000 -> "2.3M" */
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size_t fmt_human(char* dest,unsigned long long l);
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/* 1 -> "1", 4900 -> "4.8k", 2300000 -> "2.2M" */
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size_t fmt_humank(char* dest,unsigned long long l);
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/* "Sun, 06 Nov 1994 08:49:37 GMT" */
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size_t fmt_httpdate(char* dest,time_t t);
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/* internal functions, may be independently useful */
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char fmt_tohex(char c);
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#define fmt_strm(b,...) fmt_strm_internal(b,__VA_ARGS__,(char*)0)
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size_t fmt_strm_internal(char* dest,...);
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#ifndef MAX_ALLOCA
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#define MAX_ALLOCA 100000
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#endif
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#define fmt_strm_alloca(a,...) ({ size_t len=fmt_strm((char*)0,a,__VA_ARGS__)+1; char* c=(len<MAX_ALLOCA?alloca(len):0); if (c) c[fmt_strm(c,a,__VA_ARGS__)]=0; c;})
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#endif
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