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view netinstall/nio-file.cc @ 5253:b6a398dbb403
Fewer algorithmic complexity surprises, nicer errors, mapcarX(), maplist()
src/ChangeLog addition:
2010-09-01 Aidan Kehoe <kehoea@parhasard.net>
* fns.c (list_merge, list_array_merge_into_list)
(list_array_merge_into_array):
Avoid algorithmic complexity surprises when checking for
circularity in these functions.
(Freduce): Fix some formatting, in passing.
(mapcarX): Drop the SOME_OR_EVERY argument to this function;
instead, take CALLER, a symbol reflecting the Lisp-visible
function that called mapcarX(). Use CALLER with
mapping_interaction_error() when sequences are modified
illegally. Don't cons with #'some, #'every, not even a little.
(Fmapconcat, FmapcarX, Fmapvector, Fmapcan, Fmapc, Fmap)
(Fmap_into, Fsome, Fevery): Call mapcarX() with its new
arguments.
(Fmapcan): Don't unnecessarily complicate the nconc call.
(maplist): Take CALLER, a symbol reflecting the Lisp-visible
function that called maplist(), rather than having separate
arguments to indicate mapl vs. mapcon.
Avoid algorithmic complexity surprises when checking for
circularity. In #'mapcon, check a given stretch of
result for well-formedness once, which was not previously the
case, despite what the comments said.
(Fmaplist, Fmapl, Fmapcon):
Call maplist() with its new arguments.
author | Aidan Kehoe <kehoea@parhasard.net> |
---|---|
date | Wed, 01 Sep 2010 12:51:32 +0100 |
parents | 3078fd1074e8 |
children |
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/* * Copyright (c) 2000, Red Hat, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * A copy of the GNU General Public License can be found at * http://www.gnu.org/ * * Written by DJ Delorie <dj@cygnus.com> * */ /* The purpose of this file is to manage access to files stored on the local disk (i.e. "downloading" setup.ini). Called from netio.cc */ #include <stdio.h> #include <sys/types.h> #include <sys/stat.h> #include <errno.h> #include "win32.h" #include "netio.h" #include "nio-file.h" #include "resource.h" #include "msg.h" NetIO_File::NetIO_File (char *Purl) : NetIO (Purl) { struct stat s; fd = fopen (path, "rb"); if (fd) { stat (path, &s); file_size = s.st_size; } else { char *err = strerror (errno); if (!err) err = "(unknown error)"; note (IDS_ERR_OPEN_READ, path, err); } } NetIO_File::~NetIO_File () { if (fd) fclose ((FILE *)fd); } int NetIO_File::ok () { return fd ? 1 : 0; } int NetIO_File::read (char *buf, int nbytes) { return fread (buf, 1, nbytes, (FILE *)fd); }