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/* sstr2arg: convert string into argument list */
/*
* isode/compat/sstr2arg.c
*/
/*
* NOTICE
*
* Acquisition, use, and distribution of this module and related
* materials are subject to the restrictions of a license agreement.
* Consult the Preface in the User's Manual for the full terms of
* this agreement.
*
*/
/* LINTLIBRARY */
#include <stdio.h>
#include "manifest.h"
#include "general.h"
#include <errno.h>
extern int errno;
/* */
/*
stash a pointer to each field into the passed array. any common seperators
split the words. extra white-space between fields is ignored.
specially-interpreted characters:
double-quote, backslash (preceding a special char with a backslash
removes its interpretation. A backslash not followed by a special is
used to preface an octal specification for one character a string begun
with double-quote has only double-quote and backslash as special
characters.
*/
sstr2arg (srcptr, maxpf, argv, dlmstr)
register char *srcptr; /* source data */
int maxpf; /* maximum number of permitted fields */
char *argv[]; /* where to put the pointers */
char *dlmstr; /* Delimiting character */
{
char gotquote; /* currently parsing quoted string */
register int ind;
register char *destptr;
char idex[256];
if (srcptr == 0)
return (NOTOK);
memset (idex, 0, sizeof idex);
for (destptr = dlmstr; *destptr; destptr++)
idex[*destptr] = 1;
for (ind = 0, maxpf -= 2;; ind++) {
if (ind >= maxpf)
return (NOTOK);
/* Skip leading white space */
for (; *srcptr == ' ' || *srcptr == '\t'; srcptr++);
argv [ind] = srcptr;
destptr = srcptr;
for (gotquote = 0; ; ) {
if (idex[*srcptr])
{
if (gotquote) { /* don't interpret the char */
*destptr++ = *srcptr++;
continue;
}
srcptr++;
*destptr = '\0';
goto nextarg;
} else {
switch (*srcptr) {
default: /* just copy it */
*destptr++ = *srcptr++;
break;
case '\"': /* beginning or end of string */
gotquote = (gotquote) ? 0 : 1 ;
srcptr++; /* just toggle */
break;
case '\\': /* quote next character */
srcptr++; /* skip the back-slash */
switch (*srcptr) {
/* Octal character */
case '0': case '1':
case '2': case '3':
case '4': case '5':
case '6': case '7':
*destptr = '\0';
do
*destptr = (*destptr << 3) | (*srcptr++ - '0');
while (*srcptr >= '0' && *srcptr <= '7');
destptr++;
break;
/* C escape char */
case 'b':
*destptr++ = '\b';
srcptr++;
break;
case 'n':
*destptr++ = '\n';
srcptr++;
break;
case 'r':
*destptr++ = '\r';
srcptr++;
break;
case 't':
*destptr++ = '\t';
srcptr++;
break;
/* Boring -- just copy ASIS */
default:
*destptr++ = *srcptr++;
}
break;
case '\0':
*destptr = '\0';
ind++;
argv[ind] = (char *) 0;
return (ind);
}
}
}
nextarg:
continue;
}
}
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