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#include "strbuf.h"
#include <string.h>
#include <stdio.h>
#ifdef SAFE_STR
#include "err.h"
#endif
INIT_F(strbuf) {
INIT(strbuf, this, 1);
return 0;
}
/*
* Giving len < 1 is an error.
*/
INIT_F(strbuf, size_t len) {
this->mem = calloc(sizeof(*this->mem), len);
this->alloc = len;
this->ptr = 0;
this->len = 0;
return 0;
}
int strbuf_realloc(strbuf* str, size_t len) {
str->mem = realloc(str->mem, len);
str->alloc = len;
return 0;
}
FREE_F(strbuf) {
#ifdef SAFE_STR
/* has already been freed */
if (this->mem == NULL) return 1;
#endif
free (this->mem);
this->mem = NULL;
this->alloc = 0;
this->len = 0;
return 0;
}
/*
* Reallocates memmory for you. Returns 1 if memory was reallocated.
*/
int strbuf_append(strbuf* s, char c) {
int retval = 0;
#ifdef SAFE_STR
if (s->len + 1 > s->alloc) {
s->alloc <<= 1;
s->mem = realloc(s->mem, s->alloc);
retval = 1;
}
#endif
s->mem[s->len] = c;
s->ptr = ++s->len;
return retval;
}
int strbuf_cap(strbuf* s) {
/*
* TODO check memmory usage
*/
return strbuf_append(s, 0);
}
int strbuf_copy(strbuf* dest, strbuf* src) {
int retval = 0;
#ifdef SAFE_STR
if (dest->alloc < src->len) {
/*
* one extra octet allocated to have space for a finishing
* '\0'.
* */
strbuf_realloc(dest, src->len + 1);
retval = 1;
}
#endif
dest->len = src->len;
memcpy(dest->mem, src->mem, src->len);
return retval;
}
int strbuf_cmp(strbuf* a, strbuf* b) {
#ifdef SAFE_STR
if (a->alloc == 0 || b->alloc == 0) {
ERR("a or b not alloced");
return -1;
}
#endif
return strncmp(a->mem, b->mem, a->len);
}
int strbuf_c(strbuf* a, char* b) {
#ifdef SAFE_STR
if (a->alloc == 0) {
ERR("a not allocated");
return -1;
}
#endif
return strcmp(a->mem, b) == 0;
}
char* charat(strbuf* s, unsigned int idx) {
#ifdef SAFE_STR
if (idx > s->len) {
ERR("Index out of bounds");
return (char*) -1;
}
#endif
return &s->mem[idx];
}
char* strbuf_cur(strbuf* s) {
return &s->mem[s->ptr];
}
/* TODO merge this and strbuf_copy */
int DEEP_COPY(strbuf)(strbuf* dest, strbuf* src) {
return strbuf_copy(dest, src);
}
char* strbuf_end(strbuf* s) {
return &s->mem[s->len];
}
int strbuf_reset(strbuf* s) {
s->ptr = 0;
return 0;
}
int strbuf_soft_reset(strbuf* s) {
s->ptr = s->len = 0;
return 0;
}
strbuf* RESOLVE(strbuf)(strbuf* dest, strbuf* new) {
if (dest == NULL) return new;
else return dest;
}
FMT_F(strbuf) {
return sprintf(buf, "%s", this->mem);
}
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