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assign.c
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/*
** This file is part of the Matrix Brandy Basic VI Interpreter.
** Copyright (C) 2000-2014 David Daniels
** Copyright (C) 2018-2024 Michael McConnell and contributors
**
** Brandy is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2, or (at your option)
** any later version.
**
** Brandy is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with Brandy; see the file COPYING. If not, write to
** the Free Software Foundation, 59 Temple Place - Suite 330,
** Boston, MA 02111-1307, USA.
**
**
** This file contains functions that handle assignments to
** all types of variable and also the pseudo variables
*/
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
#include "common.h"
#include "target.h"
#include "basicdefs.h"
#include "tokens.h"
#include "heap.h"
#include "stack.h"
#include "strings.h"
#include "variables.h"
#include "errors.h"
#include "miscprocs.h"
#include "editor.h"
#include "evaluate.h"
#include "lvalue.h"
#include "statement.h"
#include "assign.h"
#include "fileio.h"
#include "mos.h"
#ifdef DEBUG
#include <stdio.h>
#endif
#ifdef USE_SDL
#include "graphsdl.h"
extern threadmsg tmsg;
#endif
/*
** 'assignment_invalid' is called when an attempt is made to assign to
** a variable with an invalid type in 'vartype'
*/
static void assignment_invalid(pointers address) {
DEBUGFUNCMSGIN;
DEBUGFUNCMSGOUT;
error(ERR_BROKEN, __LINE__, "assign"); /* Bad variable type found */
}
/*
** 'assign_intword' deals with assignments to normal integer variables
*/
static void assign_intword(pointers address) {
int64 value;
DEBUGFUNCMSGIN;
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
value = pop_anynum64();
if (value > MAXINTVAL || value < MININTVAL) {
DEBUGFUNCMSGOUT;
error(ERR_RANGE);
return;
}
*address.intaddr = INT64TO32(value);
DEBUGFUNCMSGOUT;
}
/*
** 'assign_intbyte' deals with assignments to unsigned 8-bit integer variables
*/
static void assign_intbyte(pointers address) {
DEBUGFUNCMSGIN;
if (!ateol[*basicvars.current]) error(ERR_SYNTAX);
else *address.uint8addr = pop_anynum32();
DEBUGFUNCMSGOUT;
}
/*
** 'assign_int64' deals with assignments to 64-bit integer variables
*/
static void assign_int64(pointers address) {
DEBUGFUNCMSGIN;
if (!ateol[*basicvars.current]) error(ERR_SYNTAX);
else *address.int64addr = pop_anynum64();
DEBUGFUNCMSGOUT;
}
/*
** 'assign_float' deals with assignments to normal floating point variables
*/
static void assign_float(pointers address) {
DEBUGFUNCMSGIN;
if (!ateol[*basicvars.current]) error(ERR_SYNTAX);
else *address.floataddr = pop_anynumfp();
DEBUGFUNCMSGOUT;
}
/*
** 'assign_stringdol' deals with assignments to normal string variables
*/
static void assign_stringdol(pointers address) {
stackitem exprtype;
basicstring result, *lhstring;
char *cp;
DEBUGFUNCMSGIN;
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
exprtype = GET_TOPITEM;
if (exprtype!=STACK_STRING && exprtype!=STACK_STRTEMP) {
DEBUGFUNCMSGOUT;
error(ERR_TYPESTR);
return;
}
result = pop_string();
lhstring = address.straddr;
if (exprtype==STACK_STRTEMP) { /* Can use string built by expression */
free_string(*lhstring);
*lhstring = result;
}
else if (lhstring->stringaddr!=result.stringaddr) { /* Not got something like 'a$=a$' */
cp = alloc_string(result.stringlen); /* Have to make copy of string */
memmove(cp, result.stringaddr, result.stringlen);
free_string(*lhstring);
lhstring->stringlen = result.stringlen;
lhstring->stringaddr = cp;
}
DEBUGFUNCMSGOUT;
}
/*
** 'assign_intbyteptr' deals with assignments to byte-sized indirect
** integer variables
*/
static void assign_intbyteptr(pointers address) {
DEBUGFUNCMSGIN;
#ifdef DEBUG
if (basicvars.debug_flags.debug) fprintf(stderr, "*** assign.c:assign_intbyteptr: address=%p\n", (void *)address.offset);
#endif
#ifdef USE_SDL
address.offset = m7offset(address.offset);
#endif
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
basicvars.memory[address.offset] = pop_anynum32();
DEBUGFUNCMSGOUT;
}
/*
** 'assign_intwordptr' deals with assignments to word-sized indirect
** integer variables
*/
static void assign_intwordptr(pointers address) {
DEBUGFUNCMSGIN;
#ifdef USE_SDL
address.offset = m7offset(address.offset);
#endif
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
store_integer(address.offset, pop_anynum32());
DEBUGFUNCMSGOUT;
}
/*
** 'assign_int64ptr' deals with assignments to indirect 64-bit
** integer variables
*/
static void assign_int64ptr(pointers address) {
DEBUGFUNCMSGIN;
#ifdef USE_SDL
address.offset = m7offset(address.offset);
#endif
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
store_int64(address.offset, pop_anynum64());
DEBUGFUNCMSGOUT;
}
/*
** 'assign_floatptr' assigns a value to an indirect floating point
** variable
*/
static void assign_floatptr(pointers address) {
DEBUGFUNCMSGIN;
#ifdef USE_SDL
address.offset = m7offset(address.offset);
#endif
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
store_float(address.offset, pop_anynumfp());
DEBUGFUNCMSGOUT;
}
static void assign_dolstrptr(pointers address) {
stackitem exprtype;
basicstring result;
DEBUGFUNCMSGIN;
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
exprtype = GET_TOPITEM;
if (exprtype!=STACK_STRING && exprtype!=STACK_STRTEMP) {
DEBUGFUNCMSGOUT;
error(ERR_TYPESTR);
return;
}
result = pop_string();
#ifdef USE_SDL
address.offset = m7offset(address.offset);
#endif
memmove(&basicvars.memory[address.offset], result.stringaddr, result.stringlen);
basicvars.memory[address.offset+result.stringlen] = asc_CR;
if (exprtype==STACK_STRTEMP) free_string(result);
DEBUGFUNCMSGOUT;
}
/*
** 'assign_intarray' handles assignments to 32-bit integer arrays.
** There is a minor issue here in that there is no pointer to the start
** of the array name available so it cannot be included in error messages
*/
static void assign_intarray(pointers address) {
basicarray *ap, *ap2;
stackitem exprtype;
int32 n;
int32 *p;
DEBUGFUNCMSGIN;
exprtype = GET_TOPITEM;
ap = *address.arrayaddr;
if (ap==NIL) { /* Undefined array */
DEBUGFUNCMSGOUT;
error(ERR_NODIMS, "(");
return;
}
if (TOPITEMISNUM) { /* array()=<value> [,<value>] */
int32 value;
if (*basicvars.current==',') { /* array()=<value>,<value>,... */
p = ap->arraystart.intbase;
n = 0;
do {
if (n>=ap->arrsize) { /* Trying to assign too many elements */
DEBUGFUNCMSGOUT;
error(ERR_BADINDEX, n, "(");
return;
}
p[n]=pop_anynum32();
n++;
if (*basicvars.current!=',') break;
basicvars.current++;
expression();
if (!(TOPITEMISNUM)) {
DEBUGFUNCMSGOUT;
error(ERR_TYPENUM);
return;
}
} while (TRUE);
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
} else if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
} else { /* array()=<value> */
value = pop_anynum32();
p = ap->arraystart.intbase;
for (n=0; n<ap->arrsize; n++) p[n] = value;
}
} else if (TOPITEMISNUMARRAY) {
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
ap2 = pop_array();
if (ap2==NIL) { /* Undefined array */
DEBUGFUNCMSGOUT;
error(ERR_NODIMS, "(");
return;
}
check_arrays(ap, ap2);
p = ap->arraystart.intbase;
if (exprtype==STACK_INTARRAY) { /* array1()=array2() */
if (ap!=ap2) memmove(ap->arraystart.intbase, ap2->arraystart.intbase, ap->arrsize*sizeof(int32));
} else if (exprtype==STACK_UINT8ARRAY) { /* array1()=array2() */
uint8 *fp = ap2->arraystart.uint8base;
for (n=0; n<ap->arrsize; n++) p[n] = fp[n];
} else if (exprtype==STACK_INT64ARRAY) { /* array1()=array2() */
int64 *fp = ap2->arraystart.int64base;
for (n=0; n<ap->arrsize; n++) p[n] = (int32)(fp[n]);
} else if (exprtype==STACK_FLOATARRAY) { /* array1()=array2() */
float64 *fp = ap2->arraystart.floatbase;
for (n=0; n<ap->arrsize; n++) p[n] = TOINT(fp[n]);
}
} else if (TOPITEMISNUMARRTEMP) {
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
basicarray temp = pop_arraytemp();
check_arrays(ap, &temp);
p = ap->arraystart.intbase;
if (exprtype==STACK_IATEMP) { /* array1()=array2()<op><value> */
memmove(ap->arraystart.intbase, temp.arraystart.intbase, ap->arrsize*sizeof(int32));
} else if (exprtype==STACK_U8ATEMP) { /* array1()=array2()<op><value> */
uint8 *fp = temp.arraystart.uint8base;
for (n=0; n<ap->arrsize; n++) p[n] = fp[n];
} else if (exprtype==STACK_I64ATEMP) { /* array1()=array2()<op><value> */
int64 *fp = temp.arraystart.int64base;
for (n=0; n<ap->arrsize; n++) p[n] = (int32)(fp[n]);
} else if (exprtype==STACK_FATEMP) { /* array1()=array2()<op><value> */
float64 *fp = temp.arraystart.floatbase;
for (n=0; n<ap->arrsize; n++) p[n] = TOINT(fp[n]);
}
free_stackmem();
} else {
DEBUGFUNCMSGOUT;
error(ERR_INTARRAY);
}
DEBUGFUNCMSGOUT;
}
/*
** 'assign_intarray' handles assignments to 32-bit integer arrays.
** There is a minor issue here in that there is no pointer to the start
** of the array name available so it cannot be included in error messages
*/
static void assign_uint8array(pointers address) {
basicarray *ap, *ap2;
stackitem exprtype;
int32 n;
uint8 *p;
DEBUGFUNCMSGIN;
exprtype = GET_TOPITEM;
ap = *address.arrayaddr;
if (ap==NIL) { /* Undefined array */
DEBUGFUNCMSGOUT;
error(ERR_NODIMS, "(");
return;
}
if (TOPITEMISNUM) { /* array()=<value> [,<value>] */
int32 value;
if (*basicvars.current==',') { /* array()=<value>,<value>,... */
p = ap->arraystart.uint8base;
n = 0;
do {
if (n>=ap->arrsize) { /* Trying to assign too many elements */
DEBUGFUNCMSGOUT;
error(ERR_BADINDEX, n, "(");
return;
}
p[n]=pop_anynum32();
n++;
if (*basicvars.current!=',') break;
basicvars.current++;
expression();
if (!(TOPITEMISNUM)) {
DEBUGFUNCMSGOUT;
error(ERR_TYPENUM);
return;
}
} while (TRUE);
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
} else if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
} else { /* array()=<value> */
value = pop_anynum32();
p = ap->arraystart.uint8base;
for (n=0; n<ap->arrsize; n++) p[n] = value;
}
} else if (TOPITEMISNUMARRAY) {
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
ap2 = pop_array();
if (ap2==NIL) { /* Undefined array */
DEBUGFUNCMSGOUT;
error(ERR_NODIMS, "(");
return;
}
check_arrays(ap, ap2);
p = ap->arraystart.uint8base;
if (exprtype==STACK_INTARRAY) { /* array1()=array2() */
int32 *fp = ap2->arraystart.intbase;
for (n=0; n<ap->arrsize; n++) p[n] = fp[n];
} else if (exprtype==STACK_UINT8ARRAY) { /* array1()=array2() */
if (ap!=ap2) memmove(ap->arraystart.uint8base, ap2->arraystart.uint8base, ap->arrsize*sizeof(uint8));
} else if (exprtype==STACK_INT64ARRAY) { /* array1()=array2() */
int64 *fp = ap2->arraystart.int64base;
for (n=0; n<ap->arrsize; n++) p[n] = (int32)(fp[n]);
} else if (exprtype==STACK_FLOATARRAY) { /* array1()=array2() */
float64 *fp = ap2->arraystart.floatbase;
for (n=0; n<ap->arrsize; n++) p[n] = TOINT(fp[n]);
}
} else if (TOPITEMISNUMARRTEMP) {
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
basicarray temp = pop_arraytemp();
check_arrays(ap, &temp);
p = ap->arraystart.uint8base;
if (exprtype==STACK_IATEMP) { /* array1()=array2()<op><value> */
int32 *fp = temp.arraystart.intbase;
for (n=0; n<ap->arrsize; n++) p[n] = fp[n];
} else if (exprtype==STACK_U8ATEMP) { /* array1()=array2()<op><value> */
memmove(ap->arraystart.uint8base, temp.arraystart.uint8base, ap->arrsize*sizeof(uint8));
} else if (exprtype==STACK_I64ATEMP) { /* array1()=array2()<op><value> */
int64 *fp = temp.arraystart.int64base;
for (n=0; n<ap->arrsize; n++) p[n] = (uint8)(fp[n]);
} else if (exprtype==STACK_FATEMP) { /* array1()=array2()<op><value> */
float64 *fp = temp.arraystart.floatbase;
for (n=0; n<ap->arrsize; n++) p[n] = TOINT(fp[n]);
}
free_stackmem();
} else {
DEBUGFUNCMSGOUT;
error(ERR_INTARRAY);
}
DEBUGFUNCMSGOUT;
}
/*
** 'assign_int64array' handles assignments to 64-bit integer arrays.
*/
static void assign_int64array(pointers address) {
basicarray *ap, *ap2;
stackitem exprtype;
int64 n;
int64 *p;
DEBUGFUNCMSGIN;
exprtype = GET_TOPITEM;
ap = *address.arrayaddr;
if (ap==NIL) { /* Undefined array */
DEBUGFUNCMSGOUT;
error(ERR_NODIMS, "(");
return;
}
if (TOPITEMISNUM) { /* array()=<value> [,<value>] */
int64 value;
if (*basicvars.current==',') { /* array()=<value>,<value>,... */
p = ap->arraystart.int64base;
n = 0;
do {
if (n>=ap->arrsize) { /* Trying to assign too many elements */
DEBUGFUNCMSGOUT;
error(ERR_BADINDEX, n, "(");
return;
}
p[n]=pop_anynum64();
n++;
if (*basicvars.current!=',') break;
basicvars.current++;
expression();
if (!(TOPITEMISNUM)) {
DEBUGFUNCMSGOUT;
error(ERR_TYPENUM);
return;
}
} while (TRUE);
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
} else if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
} else { /* array()=<value> */
value = pop_anynum64();
p = ap->arraystart.int64base;
for (n=0; n<ap->arrsize; n++) p[n] = value;
}
} else if (TOPITEMISNUMARRAY) {
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
ap2 = pop_array();
if (ap2==NIL) { /* Undefined array */
DEBUGFUNCMSGOUT;
error(ERR_NODIMS, "(");
return;
}
check_arrays(ap, ap2);
p = ap->arraystart.int64base;
if (exprtype==STACK_INTARRAY) { /* array1()=array2() */
int32 *fp = ap2->arraystart.intbase;
for (n=0; n<ap->arrsize; n++) p[n] = (fp[n]);
} else if (exprtype==STACK_UINT8ARRAY) { /* array1()=array2() */
uint8 *fp = ap2->arraystart.uint8base;
for (n=0; n<ap->arrsize; n++) p[n] = fp[n];
} else if (exprtype==STACK_INT64ARRAY) { /* array1()=array2() */
if (ap!=ap2) memmove(ap->arraystart.int64base, ap2->arraystart.int64base, ap->arrsize*sizeof(int64));
} else if (exprtype==STACK_FLOATARRAY) { /* array1()=array2() */
float64 *fp = ap2->arraystart.floatbase;
for (n=0; n<ap->arrsize; n++) p[n] = TOINT(fp[n]);
}
} else if (TOPITEMISNUMARRTEMP) {
basicarray temp = pop_arraytemp();
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
check_arrays(ap, &temp);
p = ap->arraystart.int64base;
if (exprtype==STACK_IATEMP) { /* array1()=array2()<op><value> */
int32 *fp = temp.arraystart.intbase;
for (n=0; n<ap->arrsize; n++) p[n] = fp[n];
} else if (exprtype==STACK_U8ATEMP) { /* array1()=array2()<op><value> */
uint8 *fp = temp.arraystart.uint8base;
for (n=0; n<ap->arrsize; n++) p[n] = fp[n];
} else if (exprtype==STACK_I64ATEMP) { /* array1()=array2()<op><value> */
memmove(ap->arraystart.int64base, temp.arraystart.int64base, ap->arrsize*sizeof(int64));
} else if (exprtype==STACK_FATEMP) { /* array1()=array2()<op><value> */
float64 *fp = temp.arraystart.floatbase;
for (n=0; n<ap->arrsize; n++) p[n] = TOINT(fp[n]);
}
free_stackmem();
} else {
DEBUGFUNCMSGOUT;
error(ERR_INTARRAY);
}
DEBUGFUNCMSGOUT;
}
/*
** 'assign_floatarray' deals with assignments to floating point arrays
*/
static void assign_floatarray(pointers address) {
basicarray *ap, *ap2;
stackitem exprtype;
int32 n;
float64 *p;
DEBUGFUNCMSGIN;
exprtype = GET_TOPITEM;
ap = *address.arrayaddr;
if (ap==NIL) { /* Undefined array */
DEBUGFUNCMSGOUT;
error(ERR_NODIMS, "(");
return;
}
if (TOPITEMISNUM) { /* array()=<value> */
static float64 fpvalue;
if (*basicvars.current==',') {
p = ap->arraystart.floatbase;
n = 0;
do {
if (n>=ap->arrsize) { /* Trying to assign too many elements */
DEBUGFUNCMSGOUT;
error(ERR_BADINDEX, n, "(");
return;
}
p[n]=pop_anynumfp();
n++;
if (*basicvars.current!=',') break;
basicvars.current++;
expression();
if (!(TOPITEMISNUM)) {
DEBUGFUNCMSGOUT;
error(ERR_TYPENUM);
return;
}
} while (TRUE);
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
} else if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
} else {
fpvalue = pop_anynumfp();
p = ap->arraystart.floatbase;
for (n=0; n<ap->arrsize; n++) p[n] = fpvalue;
}
} else if (TOPITEMISNUMARRAY) {
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
ap2 = pop_array();
if (ap2==NIL) { /* Undefined array */
DEBUGFUNCMSGOUT;
error(ERR_NODIMS, "(");
return;
}
check_arrays(ap, ap2);
p = ap->arraystart.floatbase;
if (exprtype==STACK_INTARRAY) { /* array1()=array2() */
int32 *ip = ap2->arraystart.intbase;
for (n=0; n<ap->arrsize; n++) p[n] = TOFLOAT(ip[n]);
} else if (exprtype==STACK_UINT8ARRAY) { /* array1()=array2() */
uint8 *ip = ap2->arraystart.uint8base;
for (n=0; n<ap->arrsize; n++) p[n] = TOFLOAT(ip[n]);
} else if (exprtype==STACK_INT64ARRAY) { /* array1()=array2() */
int64 *ip = ap2->arraystart.int64base;
for (n=0; n<ap->arrsize; n++) p[n] = TOFLOAT(ip[n]);
} else if (exprtype==STACK_FLOATARRAY) { /* array1()=array2() */
if (ap!=ap2) memmove(ap->arraystart.floatbase, ap2->arraystart.floatbase, ap->arrsize*sizeof(float64));
}
} else if (TOPITEMISNUMARRTEMP) {
basicarray temp = pop_arraytemp();
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
check_arrays(ap, &temp);
p = ap->arraystart.floatbase;
if (exprtype==STACK_IATEMP) { /* array1()=array2()<op><value> */
int32 *ip = temp.arraystart.intbase;
for (n=0; n<ap->arrsize; n++) p[n] = TOFLOAT(ip[n]);
} else if (exprtype==STACK_U8ATEMP) { /* array1()=array2()<op><value> */
uint8 *ip = temp.arraystart.uint8base;
for (n=0; n<ap->arrsize; n++) p[n] = TOFLOAT(ip[n]);
} else if (exprtype==STACK_I64ATEMP) { /* array1()=array2()<op><value> */
int64 *ip = temp.arraystart.int64base;
for (n=0; n<ap->arrsize; n++) p[n] = TOFLOAT(ip[n]);
} else if (exprtype==STACK_FATEMP) { /* array1()=array2()<op><value> */
memmove(ap->arraystart.floatbase, temp.arraystart.floatbase, ap->arrsize*sizeof(float64));
}
free_stackmem();
} else {
DEBUGFUNCMSGOUT;
error(ERR_FPARRAY);
}
DEBUGFUNCMSGOUT;
}
/*
** 'assign_strarray' handles assignments to string arrays.
** One complication here is that if the string is a normal string (that
** is, it is not a string built as the result of an expression) it has to
** be copied to the string workspace so that cases such as 'a$()=a$(0)'
** will be dealt with correctly.
*/
static void assign_strarray(pointers address) {
stackitem exprtype;
int32 n;
basicarray *ap, *ap2;
basicstring *p, *p2, stringvalue;
DEBUGFUNCMSGIN;
exprtype = GET_TOPITEM;
ap = *address.arrayaddr;
if (ap==NIL) { /* Undefined array */
DEBUGFUNCMSGOUT;
error(ERR_NODIMS, "(");
return;
}
if (exprtype==STACK_STRING || exprtype==STACK_STRTEMP) { /* array$()=<string> */
int32 stringlen;
char *stringaddr;
if (*basicvars.current==',') { /* array$()=<value>,<value>,... */
p = ap->arraystart.stringbase;
n = 0;
do {
if (n>=ap->arrsize) { /* Trying to assign too many elements */
DEBUGFUNCMSGOUT;
error(ERR_BADINDEX, n, "(");
return;
}
stringvalue = pop_string();
if (stringvalue.stringlen==0) { /* Treat the null string as a special case */
free_string(*p);
p->stringlen = 0;
p->stringaddr = nullstring; /* 'nullstring' is the null string found in 'variables.c' */
} else {
stringlen = stringvalue.stringlen;
if (exprtype==STACK_STRING) { /* Reference to normal string e.g. 'abc$' */
memmove(basicvars.stringwork, stringvalue.stringaddr, stringlen); /* Have to use a copy of the string */
free_string(*p);
p->stringlen = stringlen;
p->stringaddr = alloc_string(stringlen);
memmove(p->stringaddr, basicvars.stringwork, stringlen);
} else { /* Source is a string temp - Can use this directly */
free_string(*p);
p->stringlen = stringlen;
p->stringaddr = alloc_string(stringlen);
memmove(p->stringaddr, stringvalue.stringaddr, stringlen);
free_string(stringvalue);
}
}
p++;
n++;
if (*basicvars.current!=',') break;
basicvars.current++;
expression();
exprtype = GET_TOPITEM;
if (exprtype!=STACK_STRING && exprtype!=STACK_STRTEMP) {
DEBUGFUNCMSGOUT;
error(ERR_TYPESTR);
return;
}
} while (TRUE);
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
} else if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
} else { /* array$()=<value> */
stringvalue = pop_string();
p = ap->arraystart.stringbase;
stringlen = stringvalue.stringlen;
if (stringlen==0) { /* Treat 'array$()=""' as a special case */
for (n=0; n<ap->arrsize; n++) { /* Set all elements of the array to "" */
free_string(p[n]);
p[n].stringlen = 0;
p[n].stringaddr = nullstring;
}
} else { /* Normal case - 'array$()=<non-null string>' */
if (exprtype==STACK_STRING) {
memmove(basicvars.stringwork, stringvalue.stringaddr, stringlen);
stringaddr = basicvars.stringwork;
} else {
stringaddr = stringvalue.stringaddr; /* String is a temp string anyway */
}
for (n=0; n<ap->arrsize; n++) { /* Set all elements of the array to <stringvalue> */
free_string(*p);
p->stringlen = stringlen;
p->stringaddr = alloc_string(stringlen);
memmove(p->stringaddr, stringaddr, stringlen);
p++;
}
if (exprtype==STACK_STRTEMP) free_string(stringvalue); /* Finally dispose of string if a temporary */
}
}
} else if (exprtype==STACK_STRARRAY) { /* array$()=array$() */
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
ap2 = pop_array();
if (ap!=ap2) { /* 'a$()=a$()' could cause this code to go wrong */
if (ap2==NIL) { /* Undefined array */
DEBUGFUNCMSGOUT;
error(ERR_NODIMS, "(");
return;
}
check_arrays(ap, ap2);
p = ap->arraystart.stringbase;
p2 = ap2->arraystart.stringbase;
for (n=0; n<ap->arrsize; n++) { /* Duplicate entire array */
free_string(*p);
p->stringlen = p2->stringlen;
p->stringaddr = alloc_string(p2->stringlen);
memmove(p->stringaddr, p2->stringaddr, p2->stringlen);
p++;
p2++;
}
}
} else if (exprtype==STACK_SATEMP) { /* array1$()=array2$()<op><value> */
basicarray temp = pop_arraytemp();
int count;
if (!ateol[*basicvars.current]) {
DEBUGFUNCMSGOUT;
error(ERR_SYNTAX);
return;
}
check_arrays(ap, &temp);
count = ap->arrsize;
p = ap->arraystart.stringbase;
for (n=0; n<count; n++) free_string(p[n]); /* Discard old destination array strings */
memmove(p, temp.arraystart.stringbase, count*sizeof(basicstring)); /* Copy temp array to dest array */
free_stackmem(); /* Discard temp string array (but not the strings just copied!) */
} else {
DEBUGFUNCMSGOUT;
error(ERR_STRARRAY);
}
DEBUGFUNCMSGOUT;
}
/*
** 'assiplus_intword' handles the '+=' assignment operator for 32-bit integer
** variables
*/
static void assiplus_intword(pointers address) {
DEBUGFUNCMSGIN;
*address.intaddr+=pop_anynum32();
DEBUGFUNCMSGOUT;
}
/*
** 'assiplus_intbyte' handles the '+=' assignment operator for unsigned
** 8-bit-bit integer variables
*/
static void assiplus_intbyte(pointers address) {
DEBUGFUNCMSGIN;
*address.uint8addr+=pop_anynum32();
DEBUGFUNCMSGOUT;
}
/*
** 'assiplus_int64word' handles the '+=' assignment operator for 64-bit integer
** variables
*/
static void assiplus_int64word(pointers address) {
DEBUGFUNCMSGIN;
*address.int64addr+=pop_anynum64();
DEBUGFUNCMSGOUT;
}
/*
** 'assiplus_float' handles the '+=' assignment operator for floating point
** variables
*/
static void assiplus_float(pointers address) {
DEBUGFUNCMSGIN;
*address.floataddr+=pop_anynumfp();
DEBUGFUNCMSGOUT;
}
/*
** 'assiplus_stringdol' handles the '+=' assignment operator for string
** variables
*/
static void assiplus_stringdol(pointers address) {
stackitem exprtype;
basicstring result, *lhstring;
int32 extralen;
char *cp;
DEBUGFUNCMSGIN;
exprtype = GET_TOPITEM;
if (exprtype!=STACK_STRING && exprtype!=STACK_STRTEMP) {
DEBUGFUNCMSGOUT;
error(ERR_TYPESTR);
return;
}
result = pop_string();
extralen = result.stringlen;
if (extralen!=0) { /* Length of string to append is not zero */
int32 newlen;
lhstring = address.straddr;
newlen = lhstring->stringlen+extralen;
if (newlen>MAXSTRING) {
DEBUGFUNCMSGOUT;
error(ERR_STRINGLEN);
return;
}
cp = resize_string(lhstring->stringaddr, lhstring->stringlen, newlen);
memmove(cp+lhstring->stringlen, result.stringaddr, extralen);
lhstring->stringlen = newlen;
lhstring->stringaddr = cp;
}
if (exprtype==STACK_STRTEMP) free_string(result);
DEBUGFUNCMSGOUT;
}
/*
** 'addass_intbyteptr' handles the '+=' assignment operator for single
** byte integer indirect variables
*/
static void assiplus_intbyteptr(pointers address) {
DEBUGFUNCMSGIN;
basicvars.memory[address.offset]+=pop_anynum32();
DEBUGFUNCMSGOUT;
}
/*
** 'assiplus_intwordptr' handles the '+=' assignment operator for word
** indirect integer variables
*/
static void assiplus_intwordptr(pointers address) {
DEBUGFUNCMSGIN;
store_integer(address.offset, get_integer(address.offset)+pop_anynum32());
DEBUGFUNCMSGOUT;
}
/*
** 'assiplus_int64ptr' handles the '+=' assignment operator for word
** indirect integer variables
*/
static void assiplus_int64ptr(pointers address) {
DEBUGFUNCMSGIN;
store_int64(address.offset, get_int64(address.offset)+pop_anynum64());
DEBUGFUNCMSGOUT;
}
/*
** 'assiplus_floatptr' handles the '+=' assignment operator for indirect
** floating point variables
*/
static void assiplus_floatptr(pointers address) {
DEBUGFUNCMSGIN;
store_float(address.offset, get_float(address.offset)+pop_anynumfp());
DEBUGFUNCMSGOUT;
}
/*
** 'assiplus_dolstrptr' handles the '+=' assignment operator for indirect
** string variables
*/
static void assiplus_dolstrptr(pointers address) {
stackitem exprtype;
basicstring result;
int32 stringlen, endoff;
DEBUGFUNCMSGIN;
exprtype = GET_TOPITEM;
if (exprtype!=STACK_STRING && exprtype!=STACK_STRTEMP) {
DEBUGFUNCMSGOUT;
error(ERR_TYPESTR);
return;
}
result = pop_string();
endoff = address.offset; /* Figure out where to append the string */
stringlen = 0;
while (stringlen<=MAXSTRING && basicvars.memory[endoff]!=asc_CR) { /* Find the CR at the end of the dest string */
endoff++;
stringlen++;
}
if (stringlen>MAXSTRING) endoff = address.offset; /* CR at end not found - Assume dest is zero length */
memmove(&basicvars.memory[endoff], result.stringaddr, result.stringlen);
basicvars.memory[endoff+result.stringlen] = asc_CR;
if (exprtype==STACK_STRTEMP) free_string(result);
DEBUGFUNCMSGOUT;
}
/*
** 'assiplus_intarray' handles the '+=' assignment operator for 32-bit integer
** arrays
*/
static void assiplus_intarray(pointers address) {
stackitem exprtype;
basicarray *ap, *ap2;
int32 *p, *p2;
int32 n;
DEBUGFUNCMSGIN;
exprtype = GET_TOPITEM;
ap = *address.arrayaddr;
if (ap==NIL) { /* Undefined array */