value.c

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/***** Feature test switches ************************************************/
/***** System headers *******************************************************/
//@cond
#include "vm_config.h"
#include <stdio.h>
#include <string.h>
#include <assert.h>
//@endcond
 
/***** Local headers ********************************************************/
#include "mrubyc.h"
 
/***** Constant values ******************************************************/
/***** Macros ***************************************************************/
/***** Typedefs *************************************************************/
/***** Function prototypes **************************************************/
/***** Local variables ******************************************************/
/***** Global variables *****************************************************/
//================================================================
void (* const mrbc_delfunc[])(mrbc_value *) = {
  0, 0, 0, 0, 0, 0, 0, 0, 0,
  mrbc_instance_delete,         // MRBC_TT_OBJECT    = 9,
  mrbc_proc_delete,             // MRBC_TT_PROC      = 10,
  mrbc_array_delete,            // MRBC_TT_ARRAY     = 11,
#if MRBC_USE_STRING
  mrbc_string_delete,           // MRBC_TT_STRING    = 12,
#else
  NULL,
#endif
  mrbc_range_delete,            // MRBC_TT_RANGE     = 13,
  mrbc_hash_delete,             // MRBC_TT_HASH      = 14,
  mrbc_exception_delete,        // MRBC_TT_EXCEPTION = 15,
};
 
 
/***** Signal catching functions ********************************************/
/***** Local functions ******************************************************/
/***** Global functions *****************************************************/
 
//================================================================
int mrbc_compare(const mrbc_value *v1, const mrbc_value *v2)
{
#if MRBC_USE_FLOAT
  mrbc_float_t d1, d2;
#endif
 
  // if TT_XXX is different
  if( mrbc_type(*v1) != mrbc_type(*v2) ) {
#if MRBC_USE_FLOAT
    // but Numeric?
    if( mrbc_type(*v1) == MRBC_TT_INTEGER && mrbc_type(*v2) == MRBC_TT_FLOAT ) {
      d1 = v1->i;
      d2 = v2->d;
      goto CMP_FLOAT;
    }
    if( mrbc_type(*v1) == MRBC_TT_FLOAT && mrbc_type(*v2) == MRBC_TT_INTEGER ) {
      d1 = v1->d;
      d2 = v2->i;
      goto CMP_FLOAT;
    }
#endif
 
    // leak Empty?
    if((mrbc_type(*v1) == MRBC_TT_EMPTY && mrbc_type(*v2) == MRBC_TT_NIL) ||
       (mrbc_type(*v1) == MRBC_TT_NIL   && mrbc_type(*v2) == MRBC_TT_EMPTY)) return 0;
 
    // other case
    return mrbc_type(*v1) - mrbc_type(*v2);
  }
 
  // check value
  switch( mrbc_type(*v1) ) {
  case MRBC_TT_NIL:
  case MRBC_TT_FALSE:
  case MRBC_TT_TRUE:
    return 0;
 
  case MRBC_TT_INTEGER:
    return mrbc_integer(*v1) - mrbc_integer(*v2);
 
  case MRBC_TT_SYMBOL: {
    const char *str1 = mrbc_symid_to_str(mrbc_symbol(*v1));
    const char *str2 = mrbc_symid_to_str(mrbc_symbol(*v2));
    int diff = strlen(str1) - strlen(str2);
    int len = diff < 0 ? strlen(str1) : strlen(str2);
    int res = memcmp(str1, str2, len);
    return (res != 0) ? res : diff;
  }
 
#if MRBC_USE_FLOAT
  case MRBC_TT_FLOAT:
    d1 = mrbc_float(*v1);
    d2 = mrbc_float(*v2);
    goto CMP_FLOAT;
#endif
 
  case MRBC_TT_CLASS:
  case MRBC_TT_MODULE:
  case MRBC_TT_OBJECT:
  case MRBC_TT_PROC:
    return (v1->cls > v2->cls) * 2 - (v1->cls != v2->cls);
 
  case MRBC_TT_ARRAY:
    return mrbc_array_compare( v1, v2 );
 
#if MRBC_USE_STRING
  case MRBC_TT_STRING:
    return mrbc_string_compare( v1, v2 );
#endif
 
  case MRBC_TT_RANGE:
    return mrbc_range_compare( v1, v2 );
 
  case MRBC_TT_HASH:
    return mrbc_hash_compare( v1, v2 );
 
  default:
    return 1;
  }
 
#if MRBC_USE_FLOAT
 CMP_FLOAT:
  return -1 + (d1 == d2) + (d1 > d2)*2; // caution: NaN == NaN is false
#endif
}
 
 
#if defined(MRBC_ALLOC_VMID)
//================================================================
void mrbc_clear_vm_id(mrbc_value *v)
{
  switch( mrbc_type(*v) ) {
  case MRBC_TT_OBJECT:  mrbc_instance_clear_vm_id(v);   break;
  case MRBC_TT_PROC:    mrbc_proc_clear_vm_id(v);       break;
  case MRBC_TT_ARRAY:   mrbc_array_clear_vm_id(v);      break;
#if MRBC_USE_STRING
  case MRBC_TT_STRING:  mrbc_string_clear_vm_id(v);     break;
#endif
  case MRBC_TT_RANGE:   mrbc_range_clear_vm_id(v);      break;
  case MRBC_TT_HASH:    mrbc_hash_clear_vm_id(v);       break;
 
  default:
    // Nothing
    break;
  }
}
#endif
 
 
//================================================================
mrbc_int_t mrbc_atoi( const char *s, int base )
{
  int ret = 0;
  int sign = 0;
 
 REDO:
  switch( *s ) {
  case '-':
    sign = 1;
    // fall through.
  case '+':
    s++;
    break;
 
  case ' ':
    s++;
    goto REDO;
  }
 
  int ch;
  while( (ch = *s++) != '\0' ) {
    int n;
 
    if( 'a' <= ch ) {
      n = ch - 'a' + 10;
    } else
    if( 'A' <= ch ) {
      n = ch - 'A' + 10;
    } else
    if( '0' <= ch && ch <= '9' ) {
      n = ch - '0';
    } else {
      break;
    }
    if( n >= base ) break;
 
    ret = ret * base + n;
  }
 
  if( sign ) ret = -ret;
 
  return ret;
}
 
 
//================================================================
int mrbc_strcpy( char *dest, int destsize, const char *src )
{
  int n = destsize;
  if( n <= 0 ) return 0;
 
  while( --n != 0 ) {
    if( (*dest++ = *src++) == 0 ) goto RETURN;
  }
  *dest = 0;
 
 RETURN:
  return destsize - n - 1;
}
 
 
//================================================================
void mrbc_format_float(char *buf, int bufsiz, mrbc_float_t flo)
{
  snprintf(buf, bufsiz, "%g", flo);
  if( strpbrk(buf, ".e") ) return;
 
  int len = strlen(buf);
  mrbc_strcpy( buf + len,  bufsiz - len, ".0" );
}
 
 
//================================================================
mrbc_int_t mrbc_val_i(struct VM *vm, const mrbc_value *val)
{
  if( val == NULL ) return 0;
 
  switch( mrbc_type(*val) ) {
  case MRBC_TT_INTEGER:
    return val->i;
 
  case MRBC_TT_FLOAT:
    return val->d;
 
  default:
    ;
  }
 
  mrbc_raise(vm, MRBC_CLASS(TypeError), "argument must be Integer or Float");
  return 0;
}
 
 
//================================================================
mrbc_int_t mrbc_val_i2(struct VM *vm, const mrbc_value *val, mrbc_int_t default_value )
{
  if( val == NULL || mrbc_type(*val) == MRBC_TT_EMPTY ) return default_value;
 
  return mrbc_val_i( vm, val );
}
 
 
//================================================================
double mrbc_val_f(struct VM *vm, const mrbc_value *val)
{
  if( val == NULL ) return 0;
 
  switch( mrbc_type(*val) ) {
  case MRBC_TT_INTEGER:
    return val->i;
 
  case MRBC_TT_FLOAT:
    return val->d;
 
  default:
    ;
  }
 
  mrbc_raise(vm, MRBC_CLASS(TypeError), "argument must be Integer or Float");
  return 0;
}
 
 
//================================================================
double mrbc_val_f2(struct VM *vm, const mrbc_value *val, double default_value )
{
  if( val == NULL || mrbc_type(*val) == MRBC_TT_EMPTY ) return default_value;
 
  return mrbc_val_f( vm, val );
}
 
 
//================================================================
const char * mrbc_val_s(struct VM *vm, const mrbc_value *val)
{
  if( val == NULL ) return 0;
 
  switch( mrbc_type(*val) ) {
  case MRBC_TT_STRING:
    return mrbc_string_cstr( val );
 
  default:
    ;
  }
 
  mrbc_raise(vm, MRBC_CLASS(TypeError), "argument must be String");
  return 0;
}
 
 
//================================================================
const char * mrbc_val_s2(struct VM *vm, const mrbc_value *val, const char * default_value )
{
  if( val == NULL || mrbc_type(*val) == MRBC_TT_EMPTY ) return default_value;
 
  return mrbc_val_s( vm, val );
}
 
 
//================================================================
mrbc_int_t mrbc_to_i(struct VM *vm, mrbc_value v[], int argc, mrbc_value *val)
{
  if( val == NULL ) return 0;
 
  switch( mrbc_type(*val) ) {
  case MRBC_TT_EMPTY:
    mrbc_raise(vm, MRBC_CLASS(TypeError), 0);
    return 0;
 
  case MRBC_TT_INTEGER:
    break;
 
  case MRBC_TT_FLOAT:
    mrbc_set_integer(val, val->d);
    break;
 
  default:{
    mrbc_value ret = mrbc_send( vm, v, argc, val, "to_i", 0 );
    if( mrbc_israised(vm) ) return 0;
 
    mrbc_decref( val );
    *val = ret;
   } break;
  }
 
  return val->i;
}
 
 
//================================================================
mrbc_float_t mrbc_to_f(struct VM *vm, mrbc_value v[], int argc, mrbc_value *val)
{
  if( val == NULL ) return 0;
 
  switch( mrbc_type(*val) ) {
  case MRBC_TT_EMPTY:
    mrbc_raise(vm, MRBC_CLASS(TypeError), 0);
    return 0;
 
  case MRBC_TT_INTEGER:
    mrbc_set_float(val, val->i);
    break;
 
  case MRBC_TT_FLOAT:
    break;
 
  default:{
    mrbc_value ret = mrbc_send( vm, v, argc, val, "to_f", 0 );
    if( mrbc_israised(vm) ) return 0;
 
    mrbc_decref( val );
    *val = ret;
   } break;
  }
 
  return val->d;
}
 
 
//================================================================
char * mrbc_to_s(struct VM *vm, mrbc_value v[], int argc, mrbc_value *val)
{
  if( val == NULL ) return 0;
 
  switch( mrbc_type(*val) ) {
  case MRBC_TT_EMPTY:
    mrbc_raise(vm, MRBC_CLASS(TypeError), 0);
    return 0;
 
  case MRBC_TT_STRING:
    goto RETURN;
 
  default:{
    mrbc_value ret = mrbc_send( vm, v, argc, val, "to_s", 0 );
    if( mrbc_israised(vm) ) return 0;
 
    mrbc_decref( val );
    *val = ret;
   } break;
  }
 
 RETURN:
  return mrbc_string_cstr( val );
}
 
 
//================================================================
mrbc_value * mrbc_arg(struct VM *vm, mrbc_value v[], int argc, int n)
{
  if( argc < n ) {
    mrbc_raisef(vm, MRBC_CLASS(ArgumentError),
        "wrong number of arguments (given %d, expected %d)", argc, n);
    return 0;
  }
 
  return &v[n];
}
 
 
//================================================================
mrbc_int_t mrbc_arg_i(struct VM *vm, mrbc_value v[], int argc, int n)
{
  if( argc < n ) {
    mrbc_raisef(vm, MRBC_CLASS(ArgumentError),
        "wrong number of arguments (given %d, expected %d)", argc, n);
    return 0;
  }
 
  switch( mrbc_type(v[n]) ) {
  case MRBC_TT_INTEGER:
    return v[n].i;
 
  case MRBC_TT_FLOAT:
    return v[n].d;
 
  default:
    ;
  }
 
  mrbc_raisef(vm, MRBC_CLASS(TypeError), "argument %d must be Integer or Float", n);
  return 0;
}
 
 
//================================================================
mrbc_int_t mrbc_arg_i2(struct VM *vm, mrbc_value v[], int argc, int n, mrbc_int_t default_value)
{
  if( argc < n ) return default_value;
 
  return mrbc_arg_i( vm, v, argc, n );
}
 
 
//================================================================
mrbc_float_t mrbc_arg_f(struct VM *vm, mrbc_value v[], int argc, int n)
{
  if( argc < n ) {
    mrbc_raisef(vm, MRBC_CLASS(ArgumentError),
        "wrong number of arguments (given %d, expected %d)", argc, n);
    return 0;
  }
 
  switch( mrbc_type(v[n]) ) {
  case MRBC_TT_INTEGER:
    return v[n].i;
 
  case MRBC_TT_FLOAT:
    return v[n].d;
 
  default:
    ;
  }
 
  mrbc_raisef(vm, MRBC_CLASS(TypeError), "argument %d must be Integer or Float", n);
  return 0;
}
 
 
//================================================================
mrbc_float_t mrbc_arg_f2(struct VM *vm, mrbc_value v[], int argc, int n, mrbc_float_t default_value)
{
  if( argc < n ) return default_value;
 
  return mrbc_arg_f( vm, v, argc, n );
}
 
 
//================================================================
const char * mrbc_arg_s(struct VM *vm, mrbc_value v[], int argc, int n)
{
  if( argc < n ) {
    mrbc_raisef(vm, MRBC_CLASS(ArgumentError),
        "wrong number of arguments (given %d, expected %d)", argc, n);
    return 0;
  }
 
  switch( mrbc_type(v[n]) ) {
  case MRBC_TT_STRING:
    return mrbc_string_cstr( &v[n] );
 
  default:
    ;
  }
 
  mrbc_raisef(vm, MRBC_CLASS(TypeError), "argument %d must be String", n);
  return 0;
}
 
 
//================================================================
const char * mrbc_arg_s2(struct VM *vm, mrbc_value v[], int argc, int n, const char *default_value)
{
  if( argc < n ) return default_value;
 
  return mrbc_arg_s( vm, v, argc, n );
}
 
 
//================================================================
int mrbc_arg_b(struct VM *vm, mrbc_value v[], int argc, int n)
{
  if( argc < n ) {
    mrbc_raisef(vm, MRBC_CLASS(ArgumentError),
        "wrong number of arguments (given %d, expected %d)", argc, n);
    return 0;
  }
 
  switch( mrbc_type(v[n]) ) {
  case MRBC_TT_FALSE:
    return 0;
 
  case MRBC_TT_TRUE:
    return 1;
 
  default:
    ;
  }
 
  mrbc_raisef(vm, MRBC_CLASS(TypeError), "argument %d must be true or false", n);
  return 0;
}
 
 
//================================================================
int mrbc_arg_b2(struct VM *vm, mrbc_value v[], int argc, int n, int default_value)
{
  if( argc < n ) return default_value;
 
  return mrbc_arg_b( vm, v, argc, n );
}