URL
https://opencores.org/ocsvn/ao486/ao486/trunk
Subversion Repositories ao486
[/] [ao486/] [trunk/] [syn/] [components/] [ps2/] [software/] [exe_bsp/] [HAL/] [src/] [alt_find_dev.c] - Rev 2
Compare with Previous | Blame | View Log
/****************************************************************************** * * * License Agreement * * * * Copyright (c) 2004 Altera Corporation, San Jose, California, USA. * * All rights reserved. * * * * Permission is hereby granted, free of charge, to any person obtaining a * * copy of this software and associated documentation files (the "Software"), * * to deal in the Software without restriction, including without limitation * * the rights to use, copy, modify, merge, publish, distribute, sublicense, * * and/or sell copies of the Software, and to permit persons to whom the * * Software is furnished to do so, subject to the following conditions: * * * * The above copyright notice and this permission notice shall be included in * * all copies or substantial portions of the Software. * * * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * * DEALINGS IN THE SOFTWARE. * * * * This agreement shall be governed in all respects by the laws of the State * * of California and by the laws of the United States of America. * * * * Altera does not recommend, suggest or require that this reference design * * file be used in conjunction or combination with any other product. * ******************************************************************************/ #include <stddef.h> #include <stdio.h> #include <string.h> #include "sys/alt_dev.h" #include "priv/alt_file.h" #include "alt_types.h" /* * alt_find_dev() is used by open() in order to locate a previously registered * device with the name "name". The input argument "llist" is a pointer to the * head of the device list to search. * * The return value is a pointer to the matching device, or NULL if there is * no match. * * "name" must be an exact match for the devices registered name for a match to * be found. */ alt_dev* alt_find_dev(const char* name, alt_llist* llist) { alt_dev* next = (alt_dev*) llist->next; alt_32 len; len = strlen(name) + 1; /* * Check each list entry in turn, until a match is found, or we reach the * end of the list (i.e. next winds up pointing back to the list head). */ while (next != (alt_dev*) llist) { /* * memcmp() is used here rather than strcmp() in order to reduce the size * of the executable. */ if (!memcmp (next->name, name, len)) { /* match found */ return next; } next = (alt_dev*) next->llist.next; } /* No match found */ return NULL; }