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