Add function for parsing arguments

Signed-off-by: Piotr Nowicki <piotr.nowicki@arm.com>
This commit is contained in:
Piotr Nowicki 2020-03-13 16:26:08 +01:00
Родитель 9370f90d46
Коммит 88ebbbf0fe
1 изменённых файлов: 126 добавлений и 0 удалений

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@ -19,8 +19,134 @@
* This file is part of mbed TLS (https://tls.mbed.org)
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
/*
* This program version
*/
#define PROG_NAME "ssl_base64_dump"
#define VER_MAJOR 0
#define VER_MINOR 1
/*
* Global values
*/
FILE *b64_file = NULL; /* file with base64 codes to deserialize */
char debug = 0; /* flag for debug messages */
/*
* Basic printing functions
*/
void print_version( )
{
printf( "%s v%d.%d\n", PROG_NAME, VER_MAJOR, VER_MINOR );
}
void print_usage( )
{
print_version();
printf(
"Usage:\n"
"\t-f path - Path to the file with base64 code\n"
"\t-v - Show version\n"
"\t-h - Show this usage\n"
"\t-d - Print more information\n"
"\n"
);
}
void printf_dbg( const char *str, ... )
{
if( debug )
{
va_list args;
va_start( args, str );
printf( "debug: " );
vprintf( str, args );
fflush( stdout );
va_end( args );
}
}
void printf_err( const char *str, ... )
{
va_list args;
va_start( args, str );
fprintf( stderr, "ERROR: " );
vfprintf( stderr, str, args );
fflush( stderr );
va_end( args );
}
/*
* Exit from the program in case of error
*/
void error_exit()
{
if( NULL != b64_file )
{
fclose( b64_file );
}
exit( -1 );
}
/*
* This function takes the input arguments of this program
*/
void parse_arguments( int argc, char *argv[] )
{
int i = 1;
if( argc < 2 )
{
print_usage();
error_exit();
}
while( i < argc )
{
if( strcmp( argv[i], "-d" ) == 0 )
{
debug = 1;
}
else if( strcmp( argv[i], "-h" ) == 0 )
{
print_usage();
}
else if( strcmp( argv[i], "-v" ) == 0 )
{
print_version();
}
else if( strcmp( argv[i], "-f" ) == 0 )
{
if( ++i >= argc )
{
printf_err( "File path is empty\n" );
error_exit();
}
if( ( b64_file = fopen( argv[i], "r" ) ) == NULL )
{
printf_err( "Cannot find file \"%s\"\n", argv[i] );
error_exit();
}
}
else
{
print_usage();
error_exit();
}
i++;
}
}
int main( int argc, char *argv[] )
{
parse_arguments( argc, argv );
return 0;
}