| commit | 1c7f38170ae59d6ce57e8d9dc903fba31f74ad15 | |
| author | Jiří Zárevúcky <zarevucky.jiri@gmail.com> | |
| Mon, 22 Jan 2018 20:12:00 +0000 (22 21:12 +0100) | ||
| committer | Jiří Zárevúcky <zarevucky.jiri@gmail.com> | |
| Mon, 22 Jan 2018 20:12:00 +0000 (22 21:12 +0100) | ||
| tree | cb34b9bb6a37c2b155946737e997527889ac3cf6 | treesnapshot (tar.gz zip) |
| parent | df2e5514fa8f0044ee3ce752a6fd5cf72425718e | commitdiff |
Add nonstandard ftell64() and fseek64().
Currently, the C standard does not define any functions that can access file
offset with full 64-bit range. Standard ftell()/fseek() are nonportable on files
over 2 GB, while fgetpos()/fsetpos() can work with arbitrary length file, but
keep the position opaque, and no cannot be used for seeks to known numerical
offsets.
POSIX defines ftello()/fseeko(), which _can_ be 64-bit, but aren't guaranteed
to be by the standard, and come with additional baggage. Also, the naming
is rather awkward.
In short, there is no portable interface for this functionality, so
a pair of nonstandard functions is an adequate answer for this.
Currently, the C standard does not define any functions that can access file
offset with full 64-bit range. Standard ftell()/fseek() are nonportable on files
over 2 GB, while fgetpos()/fsetpos() can work with arbitrary length file, but
keep the position opaque, and no cannot be used for seeks to known numerical
offsets.
POSIX defines ftello()/fseeko(), which _can_ be 64-bit, but aren't guaranteed
to be by the standard, and come with additional baggage. Also, the naming
is rather awkward.
In short, there is no portable interface for this functionality, so
a pair of nonstandard functions is an adequate answer for this.
| uspace/lib/c/generic/io/io.c | diffblobblamehistory | |
| uspace/lib/c/include/stdio.h | diffblobblamehistory |