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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:17:33 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:17:33 +0000 |
commit | 5e45211a64149b3c659b90ff2de6fa982a5a93ed (patch) | |
tree | 739caf8c461053357daa9f162bef34516c7bf452 /src/port/win32fseek.c | |
parent | Initial commit. (diff) | |
download | postgresql-15-5e45211a64149b3c659b90ff2de6fa982a5a93ed.tar.xz postgresql-15-5e45211a64149b3c659b90ff2de6fa982a5a93ed.zip |
Adding upstream version 15.5.upstream/15.5
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/port/win32fseek.c')
-rw-r--r-- | src/port/win32fseek.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/port/win32fseek.c b/src/port/win32fseek.c new file mode 100644 index 0000000..985313c --- /dev/null +++ b/src/port/win32fseek.c @@ -0,0 +1,75 @@ +/*------------------------------------------------------------------------- + * + * win32fseek.c + * Replacements for fseeko() and ftello(). + * + * Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group + * + * IDENTIFICATION + * src/port/win32fseek.c + * + *------------------------------------------------------------------------- + */ + +#ifdef FRONTEND +#include "postgres_fe.h" +#else +#include "postgres.h" +#endif + +#if defined(WIN32) && defined(_MSC_VER) + +/* + * _pgfseeko64 + * + * Calling fseek() on a handle to a non-seeking device such as a pipe or + * a communications device is not supported, and fseek() may not return + * an error. This wrapper relies on the file type to check which cases + * are supported. + */ +int +_pgfseeko64(FILE *stream, pgoff_t offset, int origin) +{ + DWORD fileType; + HANDLE hFile = (HANDLE) _get_osfhandle(_fileno(stream)); + + fileType = pgwin32_get_file_type(hFile); + if (errno != 0) + return -1; + + if (fileType == FILE_TYPE_DISK) + return _fseeki64(stream, offset, origin); + else if (fileType == FILE_TYPE_CHAR || fileType == FILE_TYPE_PIPE) + errno = ESPIPE; + else + errno = EINVAL; + + return -1; +} + +/* + * _pgftello64 + * + * Same as _pgfseeko64(). + */ +pgoff_t +_pgftello64(FILE *stream) +{ + DWORD fileType; + HANDLE hFile = (HANDLE) _get_osfhandle(_fileno(stream)); + + fileType = pgwin32_get_file_type(hFile); + if (errno != 0) + return -1; + + if (fileType == FILE_TYPE_DISK) + return _ftelli64(stream); + else if (fileType == FILE_TYPE_CHAR || fileType == FILE_TYPE_PIPE) + errno = ESPIPE; + else + errno = EINVAL; + + return -1; +} + +#endif /* defined(WIN32) && defined(_MSC_VER) */ |