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/*! @file ConfigFile.cc
* @brief ConfigFile Implementation
*
* This file contains the implementation of the FileReader class.
*/
#include "ConfigFile.h"
#include <string.h>
#include <stdio.h>
#include <ctype.h>
namespace Configuration {
FileReader::FileReader(
Options_t *options
)
{
options_m = options;
}
FileReader::~FileReader()
{
}
bool FileReader::processFile(
const char* const file
)
{
#define METHOD "FileReader::processFile - "
FILE * in;
char line[256];
char option[256];
char value[256];
int line_no;
int i;
int j;
if ( file == NULL ) {
fprintf( stderr, METHOD "NULL filename\n" );
return false;
}
in = fopen( file, "r" );
if ( !in ) {
fprintf( stderr, METHOD "unable to open %s\n", file );
return false;
}
line_no = 0;
while (fgets(line, sizeof(line), in) != NULL) {
int length;
line_no++;
length = (int) strlen( line );
if ( line[length - 1] != '\n' ) {
fprintf(
stderr,
"%s: line %d is too long",
file,
line_no
);
continue;
}
line[length - 1] = '\0';
length--;
/*
* Strip off comments at end of line
*
* LHS = RHS # comment
*/
for (i=0 ; i<length ; i++ ) {
if ( line[i] == '#' ) {
line[i] = '\0';
length = i;
break;
}
}
/*
* Strip off trailing white space
*/
for (i=length-1 ; i>=0 && isspace(line[i]) ; i-- )
;
line[i+1] = '\0';
length = i+1;
/* Ignore empty lines. We have stripped
* all comments and blanks therefore, only
* an empty string needs to be checked.
*/
if (line[0] == '\0')
continue;
if (sscanf(line, "%s", option) != 1) {
fprintf(
stderr,
"%s: line %d is invalid: %s\n",
file,
line_no,
line
);
continue;
}
for (i=0; ((line[i] != '=') && (i<length)); i++)
;
if (i == length) {
fprintf(
stderr,
"%s: line %d is invalid: %s\n",
file,
line_no,
line
);
continue;
}
i++;
value[0] = '\0';
while ( isspace(line[i]) )
i++;
for (j=0; line[i] != '\0'; i++, j++ )
value[j] = line[i];
value[j] = '\0';
if (value[0] == '\0') {
fprintf(
stderr,
"%s: line %d is invalid: %s\n",
file,
line_no,
line
);
continue;
}
if ( !setOption(option, value) ) {
fprintf(
stderr,
"%s: line %d: option %s is unknown\n",
file,
line_no,
option
);
continue;
}
}
return false;
}
bool FileReader::setOption(
const char* const option,
const char* const value
)
{
Options_t *o;
for ( o=options_m ; o->option ; o++ ) {
if ( !strcmp( o->option, option ) ) {
o->value = strdup( value );
return true;
}
}
return false;
}
const char *FileReader::getOption(
const char* const option
)
{
Options_t *o;
for ( o=options_m ; o->option ; o++ ) {
if ( !strcmp( o->option, option ) ) {
return o->value;
}
}
return NULL;
}
void FileReader::printOptions(void)
{
Options_t *o;
for ( o=options_m ; o->option ; o++ ) {
fprintf( stderr, "(%s)=(%s)\n", o->option, o->value );
}
}
}
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