return -1;
}
base = (size_t [3]){0, c->pos, c->len}[whence];
- if (off < -base || off > SSIZE_MAX-base) goto fail;
+ if (off < -base || off > (ssize_t)c->size-base) goto fail;
return c->pos = base+off;
}
static size_t mread(FILE *f, unsigned char *buf, size_t len)
{
struct cookie *c = f->cookie;
- size_t rem = c->size - c->pos;
- if (len > rem) len = rem;
+ size_t rem = c->len - c->pos;
+ if (c->pos > c->len) rem = 0;
+ if (len > rem) {
+ len = rem;
+ f->flags |= F_EOF;
+ }
memcpy(buf, c->buf+c->pos, len);
c->pos += len;
rem -= len;
f->rpos = f->buf;
f->rend = f->buf + rem;
memcpy(f->rpos, c->buf+c->pos, rem);
- if (!len) f->flags |= F_EOF;
+ c->pos += rem;
return len;
}
f->wpos = f->wbase;
if (mwrite(f, f->wpos, len2) < len2) return 0;
}
- if (c->mode == 'a') c->pos = c->size;
+ if (c->mode == 'a') c->pos = c->len;
rem = c->size - c->pos;
if (len > rem) len = rem;
memcpy(c->buf+c->pos, buf, len);
c->pos += len;
- if (c->pos >= c->len) c->len = c->pos;
- c->buf[c->len==c->size ? c->len-1 : c->len] = 0;
+ if (c->pos > c->len) {
+ c->len = c->pos;
+ if (c->len < c->size) c->buf[c->len] = 0;
+ else if ((f->flags&F_NORD) && c->size) c->buf[c->size-1] = 0;
+ }
return len;
}
return 0;
}
-FILE *fmemopen(void *buf, size_t size, const char *mode)
+FILE *fmemopen(void *restrict buf, size_t size, const char *restrict mode)
{
FILE *f;
struct cookie *c;