4c739969ef
* NEW: IsMissing() is a new function that returns if an optional argument is missing. It always returns FALSE on a non-optional argument. [INTERPRETER] * NEW: Support for IsMissing(). git-svn-id: svn://localhost/gambas/trunk@6258 867c0c6c-44f3-4631-809d-bfa615b0a4ec
340 lines
5.9 KiB
C
340 lines
5.9 KiB
C
/***************************************************************************
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gbx_subr_extern.c
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(c) 2000-2013 Benoît Minisini <gambas@users.sourceforge.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA.
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***************************************************************************/
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#include <sys/wait.h>
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#include "gb_common.h"
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#include "gb_alloc.h"
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#include "gb_common_check.h"
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#include "gb_pcode.h"
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#include "gbx_subr.h"
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void SUBR_alloc(ushort code)
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{
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int size;
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int count;
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void *ptr;
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char *copy;
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SUBR_ENTER();
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if (NPARAM == 2)
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count = SUBR_get_integer(&PARAM[1]);
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else
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count = 1;
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if (TYPE_is_null(PARAM->type))
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{
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size = 1;
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copy = NULL;
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}
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if (TYPE_is_string(PARAM->type))
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{
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size = PARAM->_string.len + 1;
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copy = PARAM->_string.addr + PARAM->_string.start;
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}
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else
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{
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size = SUBR_get_integer(PARAM);
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copy = NULL;
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}
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if (count <= 0 || size <= 0)
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THROW(E_ARG);
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ALLOC(&ptr, size * count);
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if (copy)
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{
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size--;
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memcpy(ptr, copy, size);
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((char *)ptr)[size] = 0;
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}
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RETURN->type = T_POINTER;
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RETURN->_pointer.value = ptr;
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SUBR_LEAVE();
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}
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void SUBR_free(void)
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{
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void *ptr;
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SUBR_ENTER_PARAM(1);
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ptr = SUBR_get_pointer(PARAM);
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IFREE(ptr);
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SUBR_LEAVE_VOID();
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}
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void SUBR_realloc(ushort code)
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{
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int size;
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int count;
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void *ptr;
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SUBR_ENTER();
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if (NPARAM == 3)
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size = SUBR_get_integer(&PARAM[2]);
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else
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size = 1;
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count = SUBR_get_integer(&PARAM[1]);
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if (size <= 0 || count <= 0)
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THROW(E_ARG);
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ptr = SUBR_get_pointer(&PARAM[0]);
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REALLOC(&ptr, size * count);
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RETURN->type = T_POINTER;
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RETURN->_pointer.value = ptr;
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SUBR_LEAVE();
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}
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void SUBR_strptr(ushort code)
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{
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char *ptr;
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ssize_t len = 0;
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bool err;
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SUBR_ENTER();
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ptr = (char *)SUBR_get_pointer(PARAM);
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if (NPARAM == 1)
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{
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err = CHECK_strlen(ptr, &len);
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}
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else
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{
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len = SUBR_get_integer(&PARAM[1]);
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err = CHECK_address(ptr, len);
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}
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if (err)
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{
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RETURN->type = T_NULL;
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}
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else
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{
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RETURN->type = T_CSTRING;
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RETURN->_string.addr = ptr;
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RETURN->_string.start = 0;
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RETURN->_string.len = (int)len;
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}
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SUBR_LEAVE();
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}
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void SUBR_varptr(ushort code)
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{
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ushort op;
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void *ptr;
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VALUE *val;
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CLASS_VAR *var;
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SUBR_ENTER_PARAM(1);
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op = (ushort)SUBR_get_integer(PARAM);
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if ((code & 0xFF) == 1)
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{
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uint64_t optargs = BP[FP->n_local + FP->n_ctrl]._long.value;
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RETURN->type = T_BOOLEAN;
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RETURN->_boolean.value = (optargs & (1 << (FP->n_param + (op & 0xFF) - 256))) ? -1 : 0;
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}
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else
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{
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if ((op & 0xFF00) == C_PUSH_LOCAL || (op & 0xFF00) == C_PUSH_PARAM)
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{
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if ((op & 0xFF00) == C_PUSH_PARAM)
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val = &PP[(signed char)(op & 0xFF)];
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else
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val = &BP[op & 0xFF];
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switch(val->type)
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{
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case T_BOOLEAN:
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case T_BYTE:
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case T_SHORT:
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case T_INTEGER:
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ptr = &val->_integer.value;
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break;
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case T_LONG:
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ptr = &val->_long.value;
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break;
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case T_SINGLE:
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ptr = &val->_single.value;
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break;
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case T_FLOAT:
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ptr = &val->_float.value;
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break;
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case T_DATE:
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ptr = &val->_date.date;
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break;
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case T_STRING:
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case T_CSTRING:
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ptr = val->_string.addr + val->_string.start;
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break;
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case T_POINTER:
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ptr = &val->_pointer.value;
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break;
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default:
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THROW(E_TYPE, "Number", TYPE_get_name(val->type));
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}
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}
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else if ((op & 0xF800) == C_PUSH_DYNAMIC)
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{
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var = &CP->load->dyn[op & 0x7FF];
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if (OP == NULL)
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THROW_ILLEGAL();
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ptr = &OP[var->pos];
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}
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else if ((op & 0xF800) == C_PUSH_STATIC)
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{
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var = &CP->load->stat[op & 0x7FF];
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ptr = (char *)CP->stat + var->pos;
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}
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else
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THROW_ILLEGAL();
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RETURN->type = T_POINTER;
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RETURN->_pointer.value = ptr;
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}
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SUBR_LEAVE();
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}
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void SUBR_ptr(ushort code)
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{
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void *ptr;
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SUBR_ENTER_PARAM(1);
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ptr = SUBR_get_pointer_or_string(PARAM);
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CHECK_enter();
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if (sigsetjmp(CHECK_jump, TRUE) == 0)
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VALUE_read(RETURN, ptr, code & 0xF);
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CHECK_leave();
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if (CHECK_got_error())
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THROW(E_ARG);
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SUBR_LEAVE();
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}
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void SUBR_make(ushort code)
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{
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static void *jump[] = {
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&&__ERROR, &&__BOOLEAN, &&__BYTE, &&__SHORT, &&__INTEGER, &&__LONG, &&__SINGLE, &&__FLOAT,
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&&__DATE, &&__ERROR, &&__ERROR, &&__POINTER, &&__ERROR, &&__ERROR, &&__ERROR, &&__ERROR
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};
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TYPE type;
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SUBR_ENTER_PARAM(1);
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type = code & 0x3F;
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VALUE_conv(PARAM, type);
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STRING_new_temp_value(RETURN, NULL, TYPE_sizeof_memory(type));
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goto *jump[type];
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__BOOLEAN:
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*(RETURN->_string.addr) = PARAM->_boolean.value != 0;
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goto __END;
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__BYTE:
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*(RETURN->_string.addr) = PARAM->_byte.value;
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goto __END;
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__SHORT:
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memcpy(RETURN->_string.addr, &PARAM->_short.value, sizeof(short));
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goto __END;
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__INTEGER:
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memcpy(RETURN->_string.addr, &PARAM->_integer.value, sizeof(int));
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goto __END;
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__LONG:
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memcpy(RETURN->_string.addr, &PARAM->_long.value, sizeof(int64_t));
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goto __END;
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__SINGLE:
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memcpy(RETURN->_string.addr, &PARAM->_single.value, sizeof(float));
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goto __END;
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__FLOAT:
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memcpy(RETURN->_string.addr, &PARAM->_float.value, sizeof(double));
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goto __END;
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__DATE:
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memcpy(RETURN->_string.addr, &PARAM->_date.date, sizeof(int) * 2);
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goto __END;
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__POINTER:
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memcpy(RETURN->_string.addr, &PARAM->_pointer.value, sizeof(void *));
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goto __END;
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__ERROR:
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THROW_ILLEGAL();
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__END:
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SUBR_LEAVE();
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}
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