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From: Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups: comp.lang.c
Subject: Re: Freeing a dynamically allocated array of structs within a struct in C
Date: Thu, 30 Sep 2021 07:04:49 -0700
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Xref: csiph.com comp.lang.c:162879

scott@slp53.sl.home (Scott Lurndal) writes:

>     if (cep->ce_splitargs) {
>         argcount = 0;
>         cp = line;
>         while (*cp != '\0') {
>             if (argcount == MAX_ARGCOUNT) {
>                 fprintf(stdout,
>                         "Error:  More than %d arguments unsupported\n",
>                         MAX_ARGCOUNT);
>                 return 1;
>             }
>             while (*cp != '\0' && isspace(*cp)) cp++;
>             if (*cp == '\0') continue;
>             if (*cp == '"') {
>                 in_quote = true;
>                 cp++;
>             }
>             arglist[argcount++] = cp;
>             if (in_quote) {
>                 while (*cp != '\0' && *cp != '"') cp++;
>                 in_quote = false;
>             } else {
>                 while (*cp != '\0' && !isspace(*cp)) cp++;
>             }
>             if (*cp == '\0') continue;
>             *cp++ = '\0';
>         }
>     } else {
>         arglist[0] = command;
>         arglist[1] = line;
>         argcount   = 2;
>     }

int
parse_arguments_failed( char *command, char *line ){
    char *p = line;
    const int most = MAX_ARGCOUNT;
    argcount = 0;

    if(  ! cep->ce_splitargs  ){
        arglist[ argcount++ ] = command;
        arglist[ argcount++ ] = line;
        return  0;
    }

    while(   p = skip_over_spaces( p ),   *p  &&  argcount < most   ){
        if(  *p == '"'  )  p = skip_to_quote(  arglist[ argcount++ ] = p+1  );
        else               p = skip_to_space(  arglist[ argcount++ ] = p    );

        p =   *p  ? *p=0, p+1  : p;
    }

    if(  *p == 0  )  return  0;

    fprintf( stderr, "Error:  More than %d arguments unsupported\n", most );
    return  1;
}


The three helper functions skip_over_spaces(), skip_to_quote(),
and skip_to_space() are all very simple and can be written in
one or two lines each.