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/*
Copyright 2015-2022 Ian Jauslin
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#include "cli_parser.h"
#include <stdio.h>
#include <stdlib.h>
#include "definitions.cpp"
#include "array.h"
// read a config file and write the output to str_args
int read_config_file(Str_Array* str_args, const char* file, int read_from_stdin){
FILE* infile;
char c;
Char_Array buffer;
// allocate memory
init_Str_Array(str_args, ARG_COUNT);
init_Char_Array(&buffer, STR_SIZE);
// read from file
if(read_from_stdin==0){
infile=fopen(file,"r");
if(infile==NULL){
fprintf(stderr,"error: can't open file %s\n",file);
exit(-1);
}
}
else{
infile=stdin;
}
while(1){
c=fgetc(infile);
// add to str_args
if(c=='&'){
str_array_append_noinit(buffer,str_args);
init_Char_Array(&buffer, STR_SIZE);
}
else if(c==EOF){
str_array_append_noinit(buffer,str_args);
break;
}
else{
char_array_append(c,&buffer);
}
}
fclose(infile);
return(0);
}
// get the title from a string argument
int get_str_arg_title(Char_Array str_arg, Char_Array* out){
int j,k;
init_Char_Array(out,STR_SIZE);
// find "#!" at beginning of line
for(j=0;j<str_arg.length-2;j++){
if(str_arg.str[j]=='#' && str_arg.str[j+1]=='!' && (j==0 || str_arg.str[j-1]=='\n')){
break;
}
}
// if no title then error
if(j>=str_arg.length-2){
fprintf(stderr, "error: an entry in the configuration file does not have a title (which should be preceeded by '#!' at the beginning of a line)\n");
exit(-1);
}
// get title until end of line
for(k=j+2;k<str_arg.length && str_arg.str[k]!='\n'; k++){
char_array_append(str_arg.str[k],out);
}
return(0);
}
// find a string argument with the specified title
int find_str_arg(char* title, Str_Array str_args){
int i,k;
char* ptr;
Char_Array buffer;
for(i=0;i<str_args.length;i++){
get_str_arg_title(str_args.strs[i], &buffer);
// match title
for(k=0, ptr=title; k<buffer.length; k++, ptr++){
if(buffer.str[k]!=*ptr){
break;
}
}
// if match
if(k==buffer.length){
free_Char_Array(buffer);
break;
}
free_Char_Array(buffer);
}
// if found
if(i<str_args.length){
return(i);
}
else{
return(-1);
}
}
// find a string argument with the specified title
// namespace support
int find_str_arg_ns(char* title, Char_Array namespace, Str_Array str_args){
Char_Array buffer;
int ret;
// append namespace to title
char_array_cpy(namespace,&buffer);
char_array_append(':',&buffer);
char_array_append_str(title,&buffer);
// check whether the namespace entry exists
ret=find_str_arg(char_array_to_str_noinit(&buffer), str_args);
free_Char_Array(buffer);
// if not, use global entry
if(ret==-1){
return(find_str_arg(title, str_args));
}
return(ret);
}
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