/usr/include/diet/fmt.h is in libowfat-dietlibc-dev 0.29-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 | /* this header file comes from libowfat, http://www.fefe.de/libowfat/ */
#ifndef FMT_H
#define FMT_H
/* for size_t: */
#include <stddef.h>
/* for uint32_t */
#include <stdint.h>
/* for time_t: */
#include <sys/types.h>
#ifdef __cplusplus
extern "C" {
#endif
#define FMT_LONG 41 /* enough space to hold -2^127 in decimal, plus \0 */
#define FMT_ULONG 40 /* enough space to hold 2^128 - 1 in decimal, plus \0 */
#define FMT_8LONG 44 /* enough space to hold 2^128 - 1 in octal, plus \0 */
#define FMT_XLONG 33 /* enough space to hold 2^128 - 1 in hexadecimal, plus \0 */
#define FMT_LEN ((char *) 0) /* convenient abbreviation */
/* The formatting routines do not append \0!
* Use them like this: buf[fmt_ulong(buf,number)]=0; */
/* convert signed src integer -23 to ASCII '-','2','3', return length.
* If dest is not NULL, write result to dest */
size_t fmt_long(char *dest,signed long src);
/* convert unsigned src integer 23 to ASCII '2','3', return length.
* If dest is not NULL, write result to dest */
size_t fmt_ulong(char *dest,unsigned long src);
/* convert unsigned src integer 0x23 to ASCII '2','3', return length.
* If dest is not NULL, write result to dest */
size_t fmt_xlong(char *dest,unsigned long src);
/* convert unsigned src integer 023 to ASCII '2','3', return length.
* If dest is not NULL, write result to dest */
size_t fmt_8long(char *dest,unsigned long src);
size_t fmt_longlong(char *dest,signed long long src);
size_t fmt_ulonglong(char *dest,unsigned long long src);
size_t fmt_xlonglong(char *dest,unsigned long long src);
#define fmt_uint(dest,src) fmt_ulong(dest,src)
#define fmt_int(dest,src) fmt_long(dest,src)
#define fmt_xint(dest,src) fmt_xlong(dest,src)
#define fmt_8int(dest,src) fmt_8long(dest,src)
/* Like fmt_ulong, but prepend '0' while length is smaller than padto.
* Does not truncate! */
size_t fmt_ulong0(char *,unsigned long src,size_t padto);
#define fmt_uint0(buf,src,padto) fmt_ulong0(buf,src,padto)
/* convert src double 1.7 to ASCII '1','.','7', return length.
* If dest is not NULL, write result to dest */
size_t fmt_double(char *dest, double d,int max,int prec);
/* if src is negative, write '-' and return 1.
* if src is positive, write '+' and return 1.
* otherwise return 0 */
size_t fmt_plusminus(char *dest,int src);
/* if src is negative, write '-' and return 1.
* otherwise return 0. */
size_t fmt_minus(char *dest,int src);
/* copy str to dest until \0 byte, return number of copied bytes. */
size_t fmt_str(char *dest,const char *src);
/* copy str to dest until \0 byte or limit bytes copied.
* return number of copied bytes. */
size_t fmt_strn(char *dest,const char *src,size_t limit);
/* "foo" -> " foo"
* write padlen-srclen spaces, if that is >= 0. Then copy srclen
* characters from src. Truncate only if total length is larger than
* maxlen. Return number of characters written. */
size_t fmt_pad(char* dest,const char* src,size_t srclen,size_t padlen,size_t maxlen);
/* "foo" -> "foo "
* append padlen-srclen spaces after dest, if that is >= 0. Truncate
* only if total length is larger than maxlen. Return number of
* characters written. */
size_t fmt_fill(char* dest,size_t srclen,size_t padlen,size_t maxlen);
/* 1 -> "1", 4900 -> "4.9k", 2300000 -> "2.3M" */
size_t fmt_human(char* dest,unsigned long long l);
/* 1 -> "1", 4900 -> "4.8k", 2300000 -> "2.2M" */
size_t fmt_humank(char* dest,unsigned long long l);
/* "Sun, 06 Nov 1994 08:49:37 GMT" */
size_t fmt_httpdate(char* dest,time_t t);
#define FMT_UTF8 5
#define FMT_ASN1LENGTH 17 /* enough space to hold 2^128-1 */
#define FMT_ASN1TAG 19 /* enough space to hold 2^128-1 */
/* some variable length encodings for integers */
size_t fmt_utf8(char* dest,uint32_t n); /* can store 0-0x7fffffff */
size_t fmt_asn1derlength(char* dest,unsigned long long l); /* 0-0x7f: 1 byte, above that 1+bytes_needed bytes */
size_t fmt_asn1dertag(char* dest,unsigned long long l); /* 1 byte for each 7 bits; upper bit = more bytes coming */
/* internal functions, may be independently useful */
char fmt_tohex(char c);
#define fmt_strm(b,...) fmt_strm_internal(b,__VA_ARGS__,(char*)0)
size_t fmt_strm_internal(char* dest,...);
#ifndef MAX_ALLOCA
#define MAX_ALLOCA 100000
#endif
#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;})
#ifdef __cplusplus
}
#endif
#endif
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