static char *
getline_alloc(FILE *fh)
{
int ch;
size_t i = 0;
size_t len = 16;
char *buf = xosmalloc(len);
if (!buf) return NULL;
ch = getc(fh);
while (ch != '\n' && ch != '\r' && ch != EOF) {
buf[i++] = ch;
if (i == len - 1) {
char *p;
len += len;
p = xosrealloc(buf, len);
if (!p) {
osfree(buf);
return NULL;
}
buf = p;
}
ch = getc(fh);
}
if (ch == '\n' || ch == '\r') {
int otherone = ch ^ ('\n' ^ '\r');
ch = getc(fh);
/* if it's not the other eol character, put it back */
if (ch != otherone) ungetc(ch, fh);
}
buf[i++] = '\0';
return buf;
}
static bool
check_label_space(img *pimg, size_t len)
{
if (len > pimg->buf_len) {
char *b = xosrealloc(pimg->label_buf, len);
if (!b) return fFalse;
pimg->label = (pimg->label - pimg->label_buf) + b;
pimg->label_buf = b;
pimg->buf_len = len;
}
return fTrue;
}
/* realloc with error catching if it fails. */
void *
osrealloc(void *p, OSSIZE_T size)
{
/* some pre-ANSI realloc implementations don't cope with a NULL pointer */
if (p == NULL) {
p = xosmalloc(size);
} else {
#ifdef TOMBSTONES
int true_size;
size += TOMBSTONE_SIZE * 2;
p -= TOMBSTONE_SIZE;
true_size = *(size_t *)p;
printf("osrealloc (in truep=%p truesize=%d)\n", p, true_size);
if (memcmp(p + sizeof(size_t), tombstone + sizeof(size_t),
TOMBSTONE_SIZE - sizeof(size_t)) != 0) {
printf("start tombstone for block %p, size %d corrupted!",
p + TOMBSTONE_SIZE, true_size - TOMBSTONE_SIZE * 2);
}
if (memcmp(p + true_size - TOMBSTONE_SIZE, tombstone,
TOMBSTONE_SIZE) != 0) {
printf("end tombstone for block %p, size %d corrupted!",
p + TOMBSTONE_SIZE, true_size - TOMBSTONE_SIZE * 2);
}
p = realloc(p, size);
if (p == NULL) outofmem(size);
printf("osrealloc truep=%p truesize=%d\n", p, size);
memcpy(p, tombstone, TOMBSTONE_SIZE);
memcpy(p + size - TOMBSTONE_SIZE, tombstone, TOMBSTONE_SIZE);
*(size_t *)p = size;
p += TOMBSTONE_SIZE;
#else
p = xosrealloc(p, size);
#endif
}
if (p == NULL) outofmem(size);
return p;
}
