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#include <r_util.h>
/* constant string storage */
R_API RConstr* r_constr_new (int size) {
RConstr *c = R_NEW (RConstr);
c->l = size>0? size: 1024;
c->b = malloc (c->l);
c->i = *c->b = 0;
return c;
}
R_API void r_constr_free (RConstr *c) {
free (c->b);
free (c);
}
R_API const char *r_constr_get (RConstr *c, const char *str) {
char *e = c->b+c->i, *p = c->b;
for (p = c->b; p<e; p += strlen (p)+1) {
if (!strcmp (p, str))
return p;
}
return NULL;
}
R_API const char *r_constr_append (RConstr *c, const char *str) {
int i = c->i, l = strlen (str)+1;
if ((c->b + i+l) >= (c->b + c->l))
return NULL;
memcpy (c->b + i, str, l);
c->i += l;
return c->b+i;
}
R_API const char *r_constr_add (RConstr *c, const char *str) {
char *p = (char *)r_constr_get (c, str);
return p? p: r_constr_append (c, str);
}
#if MAIN
main() {
RConstr *cstr = r_constr_new (7);
printf ("%s\n", r_constr_add (cstr, "Hello"));
printf ("%s\n", r_constr_add (cstr, "Hello"));
printf ("%s\n", r_constr_add (cstr, "World"));
r_constr_free (cstr);
}
#endif
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