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Fix FileIO.readall() (new_buffersize()) for large files

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Truncate the buffer size to PY_SSIZE_T_MAX.
This commit is contained in:
Victor Stinner 2011-10-11 23:00:31 +02:00
parent 950468e553
commit c5af7730e3
1 changed files with 5 additions and 1 deletions
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6
Modules/_io/fileio.c
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@ -564,7 +564,11 @@ new_buffersize(fileio *self, size_t currentsize
*/
if (end >= SMALLCHUNK && end >= pos && pos >= 0) {
/* Add 1 so if the file were to grow we'd notice. */
return currentsize + end - pos + 1;
Py_off_t bufsize = currentsize + end - pos + 1;
if (bufsize < PY_SSIZE_T_MAX)
return (size_t)bufsize;
else
return PY_SSIZE_T_MAX;
}
}
#endif