diff options
Diffstat (limited to 'gcc/cpplib.c')
| -rw-r--r-- | gcc/cpplib.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/gcc/cpplib.c b/gcc/cpplib.c index 10dc2fc..50ef8ca 100644 --- a/gcc/cpplib.c +++ b/gcc/cpplib.c @@ -7197,7 +7197,8 @@ file_size_and_mode (fd, mode_pointer, size_pointer) } /* Read LEN bytes at PTR from descriptor DESC, for file FILENAME, - retrying if necessary. Return a negative value if an error occurs, + retrying if necessary. If MAX_READ_LEN is defined, read at most + that bytes at a time. Return a negative value if an error occurs, otherwise return the actual number of bytes read, which must be LEN unless end-of-file was reached. */ @@ -7207,9 +7208,16 @@ safe_read (desc, ptr, len) char *ptr; int len; { - int left = len; + int left, rcount, nchars; + + left = len; while (left > 0) { - int nchars = read (desc, ptr, left); + rcount = left; +#ifdef MAX_READ_LEN + if (rcount > MAX_READ_LEN) + rcount = MAX_READ_LEN; +#endif + nchars = read (desc, ptr, rcount); if (nchars < 0) { #ifdef EINTR |