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#include "stdio.h"
#include <stddef.h>
#include "stdlib.h"
#include "string.h"
#ifdef OS_ABAOS
#include "kernel.h"
#endif
#ifdef OS_ABAOS
console_t *stdio_console = NULL;
#endif
static void print_string( const char *s );
static void print_char( const char c );
static void print_newline( void );
#ifdef OS_ABAOS
static void print_string( const char *s )
{
if( stdio_console == NULL ) {
kernel_panic( "stdio_console not set!" );
}
console_put_string( stdio_console, s );
}
static void print_char( const char c )
{
if( stdio_console == NULL ) {
kernel_panic( "stdio_console not set!" );
}
console_put_char( stdio_console, c );
}
static void print_newline( void )
{
if( stdio_console == NULL ) {
kernel_panic( "stdio_console not set!" );
}
console_put_newline( stdio_console );
}
#endif
#ifdef OS_LINUX
static void print_string( const char *s )
{
syscall3( __NR_write, STDOUT_FILENO, (long)s, strlen( s ) );
}
static void print_char( const char c )
{
char s[2]; s[0] = c;
syscall3( __NR_write, STDOUT_FILENO, (long)s, 1 );
}
static void print_newline( void )
{
char s[2]; s[0] = '\n';
syscall3( __NR_write, STDOUT_FILENO, (long)s, 1 );
}
#endif
int puts( const char *s )
{
print_string( s );
print_newline( );
return 1;
}
int printf( const char *format, ... )
{
va_list args;
va_start( args, format );
int res = vprintf( format, args );
va_end( args );
return res;
}
int vprintf( const char *format, va_list args )
{
const char *s = format;
int n = 0;
while( *s != '\0' ) {
switch( *s ) {
case '\n':
print_newline( );
n++;
break;
case '%':
s++;
if( *s == '\0' ) {
print_string( "<truncated % found at end of format string>" );
print_newline( );
return -1;
}
switch( *s ) {
case '%':
print_char( '%' );
break;
case 'X': {
char buf[19];
itoa( va_arg( args, int ), (char *)buf, 16 );
print_string( buf );
n += strlen( buf );
}
break;
case 'd': {
char buf[19];
itoa( va_arg( args, int ), (char *)buf, 10 );
print_string( buf );
n += strlen( buf );
}
break;
case 'c':
print_char( va_arg( args, int ) );
break;
case 's':
print_string( va_arg( args, const char * ) );
break;
default:
print_string( "<illegal format string %" );
print_char( *s );
print_string( ">" );
print_newline( );
}
break;
default:
print_char( *s );
n++;
}
s++;
}
return n;
}
int snprintf( char *buf, size_t n, const char *format, ... )
{
va_list args;
va_start( args, format );
int res = vsnprintf( buf, n, format, args );
va_end( args );
return res;
}
#define EMIT( x ) if( len < n ) { *buf = ( x ); buf++; *buf = '\0'; len++; }
#define APPEND_STRING( s, s2 ) \
strlcat( s, s2, n - len ); \
s += strlen( s2 ); \
len += strlen( s2 ); \
if( len < n ) { \
*s = '\0'; \
}
int vsnprintf( char *buf, size_t n, const char *format, va_list args )
{
const char *s = format;
int len = 0;
*buf = '\0';
while( *s != '\0' && len < n ) {
switch( *s ) {
case '\n':
EMIT( '\n' );
break;
case '%':
s++;
if( *s == '\0' ) {
strlcpy( buf, "<truncated % found at end of format string>", n - len );
strlcat( buf, "\n", n - len - 1 );
return -1;
}
switch( *s ) {
case '%':
EMIT( '%' );
break;
case 'X': {
char buf2[19];
itoa( va_arg( args, int ), (char *)buf2, 16 );
APPEND_STRING( buf, buf2 );
}
break;
case 'd': {
char buf2[19];
itoa( va_arg( args, int ), (char *)buf2, 10 );
APPEND_STRING( buf, buf2 );
}
break;
case 'c': {
char buf2[2];
buf2[0] = (char)va_arg( args, int );
buf2[1] = '\0';
APPEND_STRING( buf, buf2 );
}
break;
case 's': {
const char *s = va_arg( args, const char * );
APPEND_STRING( buf, s );
}
break;
default: {
APPEND_STRING( buf, "<illegal format string %" );
char buf2[2];
buf2[0] = (char)( *s );
buf2[1] = '\0';
APPEND_STRING( buf, buf2 );
buf2[0] = '\n';
APPEND_STRING( buf, buf2 );
}
}
break;
default: {
char buf2[2];
buf2[0] = (char)( *s );
buf2[1] = '\0';
APPEND_STRING( buf, buf2 );
}
}
s++;
}
return len;
}
#ifdef OS_ABAOS
void __stdio_set_console( console_t *console )
{
stdio_console = console;
}
#endif
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