sstring.h

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#ifndef SSTRING_H
#define SSTRING_H

#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>

typedef struct string {
        char *s;        
        size_t len;     
} string;

typedef struct cstring {
        const char *s;  
        size_t len;     
} cstring;

#define STREMPTY(x) { (x).s = NULL; (x).len = 0; }

static inline int __attribute__ ((nonnull (1)))
newstr(string *s, const size_t len)
{
        if (len == 0) {
                STREMPTY(*s);
                return 0;
        }

        s->len = len;
        s->s = malloc(len);
        return (len && !s->s) ? -1 : 0;
}

static inline int __attribute__ ((nonnull (1,2)))
dupstr(string *s, const char *t)
{
        s->len = strlen(t);
        if (s->len == 0) {
                STREMPTY(*s);
                return 0;
        }
        s->s = strdup(t);
        return (s->s == NULL) ? -1 : 0;
}

#endif