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| author | Bruno Haible <bruno@clisp.org> | 2008-02-29 00:58:02 +0100 |
|---|---|---|
| committer | Bruno Haible <bruno@clisp.org> | 2008-02-29 00:58:02 +0100 |
| commit | e8014c6b48c5e156b61c09cf7e5681b64c644344 (patch) | |
| tree | dd8306d166f4f8c61037d35631134298072544c7 /lib/freadptr.h | |
| parent | 1ddcbefb7c81bc5e01fd8da38165bed54ca0cfd4 (diff) | |
| download | gnulib-e8014c6b48c5e156b61c09cf7e5681b64c644344.tar.gz | |
Change specification for the sake of ungetc on hypothetic platforms.
Diffstat (limited to 'lib/freadptr.h')
| -rw-r--r-- | lib/freadptr.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/freadptr.h b/lib/freadptr.h index 7697970703..3620a14372 100644 --- a/lib/freadptr.h +++ b/lib/freadptr.h @@ -23,8 +23,9 @@ extern "C" { /* Assuming the stream STREAM is open for reading: Return a pointer to the input buffer of STREAM. - If freadahead (STREAM) > 0, the result is a pointer to freadahead (STREAM) - bytes. + If freadahead (STREAM) > 0, the result is either a pointer to + freadahead (STREAM) bytes, or NULL. The latter case can happen after + use of 'ungetc (..., STREAM)'. If freadahead (STREAM) == 0, the result is not usable; it may be NULL. In this case, you should use getc (STREAM), fgetc (STREAM), or fread (..., STREAM) to access the input from STREAM. |