ssize_t
getdelim (char **lineptr, size_t *n, int delimiter, FILE *fp)
{
ssize_t result;
size_t cur_len = 0;
if (lineptr == NULL || n == NULL || fp == NULL)
{
errno = EINVAL;
return -1;
}
flockfile (fp);
if (*lineptr == NULL || *n == 0)
{
char *new_lineptr;
*n = 120;
new_lineptr = (char *) realloc (*lineptr, *n);
if (new_lineptr == NULL)
{
result = -1;
goto unlock_return;
}
*lineptr = new_lineptr;
}
for (;;)
{
int i;
i = getc_maybe_unlocked (fp);
if (i == EOF)
{
result = -1;
break;
}
/* Make enough space for len+1 (for final NUL) bytes. */
if (cur_len + 1 >= *n)
{
size_t needed_max =
SSIZE_MAX < SIZE_MAX ? (size_t) SSIZE_MAX + 1 : SIZE_MAX;
size_t needed = 2 * *n + 1; /* Be generous. */
char *new_lineptr;
if (needed_max < needed)
needed = needed_max;
if (cur_len + 1 >= needed)
{
result = -1;
errno = EOVERFLOW;
goto unlock_return;
}
new_lineptr = (char *) realloc (*lineptr, needed);
if (new_lineptr == NULL)
{
result = -1;
goto unlock_return;
}
*lineptr = new_lineptr;
*n = needed;
}
(*lineptr)[cur_len] = i;
cur_len++;
if (i == delimiter)
break;
}
(*lineptr)[cur_len] = '\0';
result = cur_len ? cur_len : result;
unlock_return:
funlockfile (fp); /* doesn't set errno */
return result;
}
/* Read up to (and including) a DELIMITER from FP into *LINEPTR (and
NUL-terminate it). *LINEPTR is a pointer returned from malloc (or
NULL), pointing to *N characters of space. It is realloc'ed as
necessary. Returns the number of characters read (not including
the null terminator), or -1 on error or EOF. */
ssize_t getdelim(char **lineptr, size_t *n, int delimiter, FILE *fp)
{
ssize_t result = 0UL;
size_t cur_len = 0UL;
if ((lineptr == NULL) || (n == NULL) || (fp == NULL)) {
errno = EINVAL;
return -1;
}
flockfile(fp);
if ((*lineptr == NULL) || (*n == 0)) {
char *new_lineptr;
*n = 120;
new_lineptr = (char *)realloc(*lineptr, *n);
if (new_lineptr == NULL) {
result = -1L;
goto unlock_return;
}
*lineptr = new_lineptr;
}
for (;;) {
int i;
i = getc_maybe_unlocked(fp);
if (i == EOF) {
result = -1L;
break;
}
/* Make enough space for len+1 (for final NUL) bytes: */
if ((cur_len + 1) >= *n) {
size_t needed_max =
((SSIZE_MAX < SIZE_MAX) ? ((size_t)SSIZE_MAX + 1L) : SIZE_MAX);
size_t needed = ((2 * *n) + 1); /* Be generous. */
char *new_lineptr;
if (needed_max < needed) {
needed = needed_max;
}
if ((cur_len + 1) >= needed) {
result = -1L;
errno = EOVERFLOW;
goto unlock_return;
}
new_lineptr = (char *)realloc(*lineptr, needed);
if (new_lineptr == NULL) {
result = -1L;
goto unlock_return;
}
*lineptr = new_lineptr;
*n = needed;
}
(*lineptr)[cur_len] = (char)i;
cur_len++;
if (i == delimiter) {
break;
}
}
(*lineptr)[cur_len] = '\0';
result = (ssize_t)(cur_len ? cur_len : (size_t)result);
unlock_return:
funlockfile(fp); /* does NOT set errno */
return result;
}
