mrubyc/src/error.c at master · sxtek/mrubyc · GitHub

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/*! @file

@brief

exception classes

<pre>

This file is distributed under BSD 3-Clause License.

</pre>

/***** Feature test switches ************************************************/

/***** System headers *******************************************************/

//@cond

#include "vm_config.h"

#include <string.h>

#include <stdarg.h>

//@endcond

/***** Local headers ********************************************************/

#include "alloc.h"

#include "value.h"

#include "symbol.h"

#include "error.h"

#include "class.h"

#include "c_string.h"

#include "vm.h"

#include "console.h"

/***** Constat values *******************************************************/

/***** Macros ***************************************************************/

/***** Typedefs *************************************************************/

/***** Function prototypes **************************************************/

/***** Local variables ******************************************************/

/***** Global variables *****************************************************/

/***** Functions ************************************************************/

//================================================================

/*! constructor

@param vm pointer to VM.

@param exc_cls pointer to Exception class.

@param message message.

@param len message length or zero.

@return exception object.

mrbc_value mrbc_exception_new(struct VM *vm, struct RClass *exc_cls, const void *message, int len )

{

// allocate memory.

mrbc_exception *ex = mrbc_alloc( vm, sizeof(mrbc_exception) );

if( !ex ) { // ENOMEM

return mrbc_nil_value();

}

MRBC_INIT_OBJECT_HEADER( ex, "EX" );

ex->cls = exc_cls;

// in case of no message.

if( !message ) {

ex->message = 0;

ex->message_size = 0;

goto RETURN;

}

// in case of message is ""

if( *(const char *)message == 0 ) {

ex->message = (const uint8_t *)"";

ex->message_size = 0;

goto RETURN;

}

// in case of message in ROM.

if( len == 0 ) {

ex->message = message;

ex->message_size = 0;

goto RETURN;

}

// else, copy the message.

uint8_t *buf = mrbc_alloc( vm, len+1 );

if( buf ) {

memcpy( buf, message, len );

buf[len] = 0;

ex->message_size = len;

} else {

ex->message_size = 0;

}

ex->message = buf;

RETURN:

return (mrbc_value){.tt = MRBC_TT_EXCEPTION, .exception = ex};

}

//================================================================

/*! constructor with allocated message buffer.

@param vm pointer to VM.

@param exc_cls pointer to Exception class.

@param message message buffer.

@param len message length.

@return exception object.

mrbc_value mrbc_exception_new_alloc(struct VM *vm, struct RClass *exc_cls, const void *message, int len )

{

// allocate memory.

mrbc_exception *ex = mrbc_alloc( vm, sizeof(mrbc_exception) );

if( !ex ) { // ENOMEM

return mrbc_nil_value();

}

MRBC_INIT_OBJECT_HEADER( ex, "EX" );

ex->cls = exc_cls;

ex->message = message;

ex->message_size = len;

return (mrbc_value){.tt = MRBC_TT_EXCEPTION, .exception = ex};

}

//================================================================

/*! destructor

@param value target.

void mrbc_exception_delete(mrbc_value *value)

{

if( value->exception->message_size ) {

mrbc_raw_free( (void *)value->exception->message );

}

mrbc_raw_free( value->exception );

}

//================================================================

/*! raise exception

@param vm pointer to VM.

@param exc_cls pointer to Exception class or NULL.

@param msg message or NULL.

@note (usage) mrbc_raise(vm, MRBC_CLASS(TypeError), "message here.");

void mrbc_raise( struct VM *vm, struct RClass *exc_cls, const char *msg )

{

if( vm ) {

struct RClass *cls = exc_cls ? exc_cls : MRBC_CLASS(RuntimeError);

const char msg_len = msg ? strlen(msg) : 0;

mrbc_decref(&vm->exception);

vm->exception = mrbc_exception_new( vm, cls, msg, msg_len );

vm->flag_preemption = 2;

} else {

mrbc_printf("Exception: %s (%s)\n", msg ? msg : mrbc_symid_to_str(exc_cls->sym_id), mrbc_symid_to_str(exc_cls->sym_id));

}

//================================================================

/*! raise exception like printf

@param vm pointer to VM.

@param exc_cls pointer to Exception class.

@param fstr format string.

void mrbc_raisef( struct VM *vm, struct RClass *exc_cls, const char *fstr, ... )

{

static const int MESSAGE_INI_LEN = 32;

va_list ap;

va_start( ap, fstr );

char *buf = 0;

if( vm ) buf = mrbc_alloc( vm, MESSAGE_INI_LEN );

if( buf ) {

mrbc_vasprintf( &buf, MESSAGE_INI_LEN, fstr, ap );

mrbc_decref(&vm->exception);

vm->exception = mrbc_exception_new_alloc( vm,

exc_cls ? exc_cls : MRBC_CLASS(RuntimeError),

buf, strlen(buf) );

vm->flag_preemption = 2;

} else {

// VM == NULL or ENOMEM

mrbc_print("Exception: ");

mrbc_vprintf( fstr, ap );

mrbc_printf(" (%s)\n", exc_cls ? mrbc_symid_to_str(exc_cls->sym_id) : "RuntimeError");

}

va_end( ap );

}

//================================================================

/*! display exception

@param v pointer to Exception object.

void mrbc_print_exception( const mrbc_value *v )

{

if( mrbc_type(*v) != MRBC_TT_EXCEPTION ) return;

const mrbc_exception *exc = v->exception;

const char *clsname = mrbc_symid_to_str(exc->cls->sym_id);

mrbc_printf("Exception: %s (%s)\n",

exc->message ? (const char *)exc->message : clsname, clsname );

}

//================================================================

/*! display exception in vm.

@param vm pointer to VM

void mrbc_print_vm_exception( const struct VM *vm )

{

if( mrbc_type(vm->exception) != MRBC_TT_EXCEPTION ) return;

const mrbc_exception *exc = vm->exception.exception;

const char *clsname = mrbc_symid_to_str(exc->cls->sym_id);

mrbc_printf("Exception(vm_id=%d): %s (%s)\n", vm->vm_id,

exc->message ? (const char *)exc->message : clsname, clsname );

}

/***** Exception class ******************************************************/

//================================================================

/*! (method) new

static void c_exception_new(struct VM *vm, mrbc_value v[], int argc)

{

assert( mrbc_type(v[0]) == MRBC_TT_CLASS );

mrbc_value value;

if( argc == 1 && mrbc_type(v[1]) == MRBC_TT_STRING ) {

value = mrbc_exception_new(vm, v[0].cls, mrbc_string_cstr(&v[1]), mrbc_string_size(&v[1]));

} else {

value = mrbc_exception_new(vm, v[0].cls, NULL, 0);

}

SET_RETURN(value);

}

//================================================================

/*! (method) message

static void c_exception_message(struct VM *vm, mrbc_value v[], int argc)

{

mrbc_value value;

if( v[0].exception->message ) {

value = mrbc_string_new( vm, v[0].exception->message, v[0].exception->message_size );

} else {

value = mrbc_string_new_cstr(vm, mrbc_symid_to_str(v->exception->cls->sym_id));

}

mrbc_decref( &v[0] );

v[0] = value;

}

/* mruby/c Exception class hierarchy.

Exception

NoMemoryError

NotImplementedError

StandardError

ArgumentError

IndexError

NameError

NoMethodError

RangeError

RuntimeError

TypeError

ZeroDivisionError

/* MRBC_AUTOGEN_METHOD_TABLE

FILE("_autogen_class_exception.h")

CLASS("Exception")

METHOD("new", c_exception_new )

METHOD("message", c_exception_message )

CLASS("NoMemoryError")

SUPER("Exception")

CLASS("NotImplementedError")

SUPER("Exception")

CLASS("StandardError")

SUPER("Exception")

CLASS("ArgumentError")

SUPER("StandardError")

CLASS("IndexError")

SUPER("StandardError")

CLASS("NameError")

SUPER("StandardError")

CLASS("NoMethodError")

SUPER("NameError")

CLASS("RangeError")

SUPER("StandardError")

CLASS("RuntimeError")

SUPER("StandardError")

CLASS("TypeError")

SUPER("StandardError")

CLASS("ZeroDivisionError")

SUPER("StandardError")

#include "_autogen_class_exception.h"

mrubyc/src/error.c at master · sxtek/mrubyc · GitHub

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