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/* --- BEGIN COPYRIGHT BLOCK ---
* 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; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Copyright (C) 2007 Red Hat, Inc.
* All rights reserved.
* --- END COPYRIGHT BLOCK ---
*/
#include "options.h"
#include <stdio.h>
#include <string.h>
#include <assert.h>
/*
* (C) 1998 Netscape Communications Corporation
* All rights reserved
* Intellectual property rulez!
*
*/
/* this file maintains a static linked list of the
options it knows about
*/
static OPTION *option_list = NULL;
static OPTION *last_option = NULL;
static char* OPT_parseArgument(char *arg,char**valid);
/* OPT_getValue(char *option, char** output)
returns 1 if the specified option exists,
- value is put into 'output'
returns 0 if the specified option doesn't exist
- output is unchanged
*/
int OPT_getValue(char *option, char **output) {
OPTION *opt = option_list;
while (opt) {
if (! strcmp(opt->name,option)) {
*output = opt->value;
return 1;
}
opt = opt->next;
}
return 0;
}
static char* OPT_parseOptFile(char *filename, char*validlist[])
{
FILE *fp;
char buffer[1024];
if (filename == NULL || filename[0] == '\0') {
return ("Bad syntax for 'optfile'\n");
}
fp = fopen(filename,"r");
if (fp == NULL) {
return ("Options file could not be opened for reading\n");
}
while (fgets(buffer,1024,fp)) {
if (buffer[strlen(buffer)-1] == '\n') buffer[strlen(buffer)-1] = '\0';
if (buffer[strlen(buffer)-1] == '\r') buffer[strlen(buffer)-1] = '\0';
OPT_parseArgument(strdup(buffer),validlist);
}
fclose(fp);
return NULL;
}
static char *OPT_parseArgument(char *arg, char* validlist[]) {
char *error;
char *INV_ARG = "invalid argument: %s";
char *eq;
OPTION *new_opt;
if (!strncmp(arg,"optfile=",8)) {
return OPT_parseOptFile(&arg[8],validlist);
}
new_opt = (OPTION*)malloc(sizeof(OPTION));
new_opt->next = NULL;
new_opt->name = strdup(arg);
eq = strchr(new_opt->name,'=');
if (eq) {
*eq = 0;
}
new_opt->value = strchr(arg,'=');
if (new_opt->value != NULL) {
new_opt->value++;
}
if (option_list == NULL) {
option_list = new_opt;
last_option = new_opt;
}
else {
last_option->next = new_opt;
last_option= new_opt;
}
if (!validlist) {
return NULL;
}
else {
int i=0;
while (validlist[i]) {
if (! strcmp(validlist[i],new_opt->name)) {
return NULL;
}
i+=2;
}
}
error = (char *)malloc(strlen(INV_ARG)+strlen(new_opt->name)+5);
sprintf(error,INV_ARG,new_opt->name);
return error;
}
/* char *OPT_parseOptions(int ac, char **av)
constructs the linked list of options
ac: number of arguments
av: array of arguments
valid: array of valid arguments (can be null)
returns:
NULL if no error
char* with error text if error. caller is responsible for
freeing this memory
*/
char * OPT_parseOptions(int ac, char **av, char *valid[]) {
int i=0;
char *r=NULL;
assert(option_list == NULL);
assert(last_option == NULL);
assert(av != NULL);
if (ac == 1) return NULL;
for (i=0; i<ac-1; i++) {
r = OPT_parseArgument(av[1+i],valid);
if (r) return r;
}
return r;
}
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