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/* ISC license. */
#include <string.h>
#include <skalibs/types.h>
#include <skalibs/sgetopt.h>
#include <skalibs/buffer.h>
#include <skalibs/strerr.h>
#define USAGE "s6-seq [ -w ] [ -s separator ] limits"
#define dieusage() strerr_dieusage(100, USAGE)
int main (int argc, char const *const *argv)
{
char const *sep = "\n" ;
size_t fixed = 0, seplen = 1 ;
unsigned int i = 1, increment = 1, last ;
char fmt[UINT_FMT] ;
PROG = "s6-seq" ;
{
subgetopt l = SUBGETOPT_ZERO ;
for (;;)
{
int opt = subgetopt_r(argc, argv, "ws:", &l) ;
if (opt == -1) break ;
switch (opt)
{
case 'w': fixed = 1 ; break ;
case 's': sep = l.arg ; seplen = strlen(sep) ; break ;
default : dieusage() ;
}
}
argc -= l.ind ; argv += l.ind ;
}
switch (argc)
{
case 1 :
if (!uint0_scan(argv[0], &last)) dieusage() ;
break ;
case 2 :
if (!uint0_scan(argv[0], &i)
|| !uint0_scan(argv[1], &last)) dieusage() ;
break ;
case 3 :
if (!uint0_scan(argv[0], &i)
|| !uint0_scan(argv[1], &increment)
|| !uint0_scan(argv[2], &last)) dieusage() ;
break ;
default : dieusage() ;
}
if (!seplen) seplen = 1 ;
if (fixed) fixed = uint_fmt(0, i + increment * ((last - i) / increment)) ;
for (; i <= last ; i += increment)
{
if (buffer_put(buffer_1, fmt, fixed ? (uint0_fmt(fmt, i, fixed), fixed) : uint_fmt(fmt, i)) < 0) goto err ;
if (buffer_put(buffer_1, sep, seplen) < 0) goto err ;
}
if (!buffer_flush(buffer_1)) goto err ;
return 0 ;
err:
strerr_diefu1sys(111, "write to stdout") ;
}
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