mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-11-17 05:10:54 +00:00
83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
/*
|
|
* Copyright (c) 2005, Swedish Institute of Computer Science
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* This file is part of the Contiki operating system.
|
|
*
|
|
*/
|
|
|
|
#include "symtab.h"
|
|
|
|
#include "loader/symbols.h"
|
|
|
|
#include <string.h>
|
|
|
|
/* Binary search is twice as large but still small. */
|
|
#ifndef SYMTAB_CONF_BINARY_SEARCH
|
|
#define SYMTAB_CONF_BINARY_SEARCH 1
|
|
#endif
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
#if SYMTAB_CONF_BINARY_SEARCH
|
|
void *
|
|
symtab_lookup(const char *name)
|
|
{
|
|
int start, middle, end;
|
|
int r;
|
|
|
|
start = 0;
|
|
end = symbols_nelts - 1; /* Last entry is { 0, 0 }. */
|
|
|
|
while(start <= end) {
|
|
/* Check middle, divide */
|
|
middle = (start + end) / 2;
|
|
r = strcmp(name, symbols[middle].name);
|
|
if(r < 0) {
|
|
end = middle - 1;
|
|
} else if(r > 0) {
|
|
start = middle + 1;
|
|
} else {
|
|
return symbols[middle].value;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
#else /* SYMTAB_CONF_BINARY_SEARCH */
|
|
void *
|
|
symtab_lookup(const char *name)
|
|
{
|
|
const struct symbols *s;
|
|
for(s = symbols; s->name != NULL; ++s) {
|
|
if(strcmp(name, s->name) == 0) {
|
|
return s->value;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
#endif /* SYMTAB_CONF_BINARY_SEARCH */
|
|
/*---------------------------------------------------------------------------*/
|