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seq, xargs: style: put main at bottom

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Hiltjo Posthuma
2015-03-07 13:36:40 +01:00
parent 0c17cd0fb3
commit 37eaf92a7d
2 changed files with 143 additions and 147 deletions
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130
seq.c
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@@ -5,9 +5,69 @@
#include "util.h"
static int digitsleft(const char *);
static int digitsright(const char *);
static int validfmt(const char *);
static int
digitsleft(const char *d)
{
char *exp;
int shift;
if (*d == '+')
d++;
exp = strpbrk(d, "eE");
shift = exp ? estrtonum(&exp[1], INT_MIN, INT_MAX) : 0;
return MAX(0, strspn(d, "-0123456789") + shift);
}
static int
digitsright(const char *d)
{
char *exp;
int shift, after;
exp = strpbrk(d, "eE");
shift = exp ? estrtonum(&exp[1], INT_MIN, INT_MAX) : 0;
after = (d = strchr(d, '.')) ? strspn(&d[1], "0123456789") : 0;
return MAX(0, after - shift);
}
static int
validfmt(const char *fmt)
{
int occur = 0;
literal:
while (*fmt)
if (*fmt++ == '%')
goto format;
return occur == 1;
format:
if (*fmt == '%') {
fmt++;
goto literal;
}
fmt += strspn(fmt, "-+#0 '");
fmt += strspn(fmt, "0123456789");
if (*fmt == '.') {
fmt++;
fmt += strspn(fmt, "0123456789");
}
if (*fmt == 'L')
fmt++;
switch (*fmt) {
case 'f': case 'F':
case 'g': case 'G':
case 'e': case 'E':
case 'a': case 'A':
occur++;
goto literal;
default:
return 0;
}
}
static void
usage(void)
@@ -86,67 +146,3 @@ main(int argc, char *argv[])
return 0;
}
static int
digitsleft(const char *d)
{
char *exp;
int shift;
if (*d == '+')
d++;
exp = strpbrk(d, "eE");
shift = exp ? estrtonum(&exp[1], INT_MIN, INT_MAX) : 0;
return MAX(0, strspn(d, "-0123456789") + shift);
}
static int
digitsright(const char *d)
{
char *exp;
int shift, after;
exp = strpbrk(d, "eE");
shift = exp ? estrtonum(&exp[1], INT_MIN, INT_MAX) : 0;
after = (d = strchr(d, '.')) ? strspn(&d[1], "0123456789") : 0;
return MAX(0, after - shift);
}
static int
validfmt(const char *fmt)
{
int occur = 0;
literal:
while (*fmt)
if (*fmt++ == '%')
goto format;
return occur == 1;
format:
if (*fmt == '%') {
fmt++;
goto literal;
}
fmt += strspn(fmt, "-+#0 '");
fmt += strspn(fmt, "0123456789");
if (*fmt == '.') {
fmt++;
fmt += strspn(fmt, "0123456789");
}
if (*fmt == 'L')
fmt++;
switch (*fmt) {
case 'f': case 'F':
case 'g': case 'G':
case 'e': case 'E':
case 'a': case 'A':
occur++;
goto literal;
default:
return 0;
}
}