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MYOPT.C
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C/C++ Source or Header
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1992-07-13
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1KB
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47 lines
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include "myopt.h"
#define TRUE 1
#define FALSE 0
char *p_optstr;
int my_getopt(int argc, char *argv[], char *optstring)
{
static index = 1;
char ch;
char *pch = NULL;
p_optstr = NULL;
if ( ! (index < argc) )
return(0);
if (argv[index][0] == '-'
&& isalnum(ch = argv[index][1]))
{
if (pch = strchr( optstring, ch))
{
// We have an option flag.
// Does it have an arguement?
if (*(pch + 1) == ':'
&& index < argc -1)
{
// We have an arguement.
p_optstr = argv[index+1];
index += 2;
return((int) ch);
}
else
{
index++;
return((int) ch);
}
}
}
p_optstr = argv[index];
index++;
return(-1);
}