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#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "text.h"
static bool text_vprintf(Text *txt, size_t pos, const char *format, va_list ap) {
va_list ap_save;
va_copy(ap_save, ap);
int len = vsnprintf(NULL, 0, format, ap);
if (len == -1) {
va_end(ap_save);
return false;
}
char *buf = malloc(len+1);
bool ret = buf && (vsnprintf(buf, len+1, format, ap_save) == len) && text_insert(txt, pos, buf, len);
free(buf);
va_end(ap_save);
return ret;
}
bool text_appendf(Text *txt, const char *format, ...) {
va_list ap;
va_start(ap, format);
bool ret = text_vprintf(txt, text_size(txt), format, ap);
va_end(ap);
return ret;
}
bool text_printf(Text *txt, size_t pos, const char *format, ...) {
va_list ap;
va_start(ap, format);
bool ret = text_vprintf(txt, pos, format, ap);
va_end(ap);
return ret;
}
bool text_byte_get(const Text *txt, size_t pos, char *byte) {
return text_bytes_get(txt, pos, 1, byte);
}
size_t text_bytes_get(const Text *txt, size_t pos, size_t len, char *buf) {
if (!buf)
return 0;
char *cur = buf;
size_t rem = len;
for (Iterator it = text_iterator_get(txt, pos);
text_iterator_valid(&it);
text_iterator_next(&it)) {
if (rem == 0)
break;
size_t piece_len = it.end - it.text;
if (piece_len > rem)
piece_len = rem;
if (piece_len) {
memcpy(cur, it.text, piece_len);
cur += piece_len;
rem -= piece_len;
}
}
return len - rem;
}
char *text_bytes_alloc0(const Text *txt, size_t pos, size_t len) {
if (len == SIZE_MAX)
return NULL;
char *buf = malloc(len+1);
if (!buf)
return NULL;
len = text_bytes_get(txt, pos, len, buf);
buf[len] = '\0';
return buf;
}
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