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tests.c
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tests.c
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/****************************************************************************
*
* The Unit Test backend
* Copyright (C) 2023 Sean Conner
*
* This program 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 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*
* Comments, questions and criticisms can be sent to: sean@conman.org
*
****************************************************************************/
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <setjmp.h>
#include <errno.h>
#include <time.h>
#include <mc6809.h>
#include <mc6809dis.h>
#include "a09.h"
#if defined(__clang__)
# pragma clang diagnostic ignored "-Wmissing-noreturn"
# pragma clang diagnostic ignored "-Wswitch-enum"
#endif
#if defined(__GNUC__) && __GNUC__ >= 11
# pragma GCC diagnostic ignored "-Wenum-conversion"
#endif
/**************************************************************************/
#define MAX_PROG 64
enum vmops
{
VM_LOR, /* why yes, these do match enum operator */
VM_LAND,
VM_GT,
VM_GE,
VM_EQ,
VM_LE,
VM_LT,
VM_NE,
VM_BOR,
VM_BEOR,
VM_BAND,
VM_SHR,
VM_SHL,
VM_SUB,
VM_ADD,
VM_MUL,
VM_DIV,
VM_MOD,
VM_EXP,
VM_NEG, /* and now new operators */
VM_NOT,
VM_LIT,
VM_AT8,
VM_AT16,
VM_CPUCC,
VM_CPUCCc,
VM_CPUCCv,
VM_CPUCCz,
VM_CPUCCn,
VM_CPUCCi,
VM_CPUCCh,
VM_CPUCCf,
VM_CPUCCe,
VM_CPUA,
VM_CPUB,
VM_CPUDP,
VM_CPUD,
VM_CPUX,
VM_CPUY,
VM_CPUU,
VM_CPUS,
VM_CPUPC,
VM_IDX, /* "/offset,x" == "(/x + offset)" */
VM_IDY,
VM_IDS,
VM_IDU,
VM_SCMP,
VM_SEX,
VM_TIMEON,
VM_TIMEOFF,
VM_FALSE,
VM_TRUE,
VM_TO8,
VM_TO16,
VM_PROT,
VM_EXIT,
};
enum
{
XC01 = 1 / ((int)VM_LOR == (int)OP_LOR),
XC02 = 1 / ((int)VM_LAND == (int)OP_LAND),
XC03 = 1 / ((int)VM_GT == (int)OP_GT),
XC04 = 1 / ((int)VM_GE == (int)OP_GE),
XC05 = 1 / ((int)VM_EQ == (int)OP_EQ),
XC06 = 1 / ((int)VM_LE == (int)OP_LE),
XC07 = 1 / ((int)VM_LT == (int)OP_LT),
XC08 = 1 / ((int)VM_NE == (int)OP_NE),
XC09 = 1 / ((int)VM_BOR == (int)OP_BOR),
XC10 = 1 / ((int)VM_BEOR == (int)OP_BEOR),
XC11 = 1 / ((int)VM_BAND == (int)OP_BAND),
XC12 = 1 / ((int)VM_SHR == (int)OP_SHR),
XC13 = 1 / ((int)VM_SHL == (int)OP_SHL),
XC14 = 1 / ((int)VM_SUB == (int)OP_SUB),
XC15 = 1 / ((int)VM_ADD == (int)OP_ADD),
XC16 = 1 / ((int)VM_MUL == (int)OP_MUL),
XC17 = 1 / ((int)VM_DIV == (int)OP_DIV),
XC18 = 1 / ((int)VM_MOD == (int)OP_MOD),
XV19 = 1 / ((int)VM_EXP == (int)OP_EXP),
};
enum
{
TEST_FAILED = MC6809_FAULT_user,
TEST_NON_READ_MEM,
TEST_WEEDS,
TEST_NON_WRITE_MEM,
TEST_max,
};
struct memprot
{
bool read : 1;
bool write : 1;
bool exec : 1;
bool tron : 1;
bool check : 1;
};
struct unittest
{
uint16_t addr;
char const *filename;
size_t line;
struct buffer name;
};
struct vmcode
{
size_t line;
enum vmops prog[MAX_PROG];
char tag[133];
};
struct Assert
{
tree__s tree;
uint16_t here;
size_t cnt;
struct vmcode *Asserts;
};
struct testdata
{
struct a09 *a09;
bool (*fmtwrite)(struct format *,struct opcdata *,void const *,size_t,bool);
bool (*fmtrmb) (struct format *,struct opcdata *);
bool (*fmtorg) (struct format *,struct opcdata *);
bool (*fmtalign)(struct format *,struct opcdata *);
tree__s *Asserts;
struct unittest *units;
size_t nunits;
unsigned long icount;
mc6809__t cpu;
mc6809dis__t dis;
uint16_t addr;
uint16_t sp;
uint16_t stacksize;
uint16_t inittestpc;
uint16_t testpc;
uint16_t resumepc;
uint8_t fill;
bool tron;
bool timing;
bool intest;
char errbuf[128];
mc6809byte__t memory[65536u];
struct memprot prot [65536u];
};
struct labeltable
{
label label;
enum vmops op;
};
static bool ft_expr(enum vmops [],size_t,size_t *,struct testdata *,struct a09 *,struct buffer *,int);
/**************************************************************************/
static inline struct Assert *tree2Assert(tree__s *tree)
{
assert(tree != NULL);
#if defined(__clang__)
# pragma clang diagnostic push "-Wcast-align"
# pragma clang diagnostic ignored "-Wcast-align"
#endif
return (struct Assert *)((char *)tree - offsetof(struct Assert,tree));
#if defined(__clang__)
# pragma clang diagnostic pop "-Wcast-align"
#endif
}
/**************************************************************************/
static struct vmcode *new_program(struct Assert *Assert)
{
assert(Assert != NULL);
struct vmcode *new = realloc(Assert->Asserts,(Assert->cnt + 1) * sizeof(struct vmcode));
if (new != NULL)
{
Assert->Asserts = new;
new = &Assert->Asserts[Assert->cnt++];
new->line = 0;
new->prog[0] = VM_EXIT;
new->tag[0] = '\0';
}
return new;
}
/**************************************************************************/
static int Assertaddrcmp(void const *restrict needle,void const *restrict haystack)
{
uint16_t const *key = needle;
struct Assert const *value = haystack;
if (*key < value->here)
return -1;
else if (*key > value->here)
return 1;
else
return 0;
}
/**************************************************************************/
static int Asserttreecmp(void const *restrict needle,void const *restrict haystack)
{
struct Assert const *key = needle;
struct Assert const *value = haystack;
if (key->here < value->here)
return -1;
else if (key->here > value->here)
return 1;
else
return 0;
}
/**************************************************************************/
static struct Assert *get_Assert(struct a09 *a09,struct testdata *data,uint16_t here)
{
assert(a09 != NULL);
assert(data != NULL);
struct Assert *Assert;
tree__s *tree = tree_find(data->Asserts,&here,Assertaddrcmp);
if (tree == NULL)
{
Assert = malloc(sizeof(struct Assert));
if (Assert == NULL)
{
message(a09,MSG_ERROR,"E0046: out of memory");
return NULL;
}
Assert->tree.left = NULL;
Assert->tree.right = NULL;
Assert->tree.height = 0;
Assert->here = here;
Assert->cnt = 0;
Assert->Asserts = NULL;
data->Asserts = tree_insert(data->Asserts,&Assert->tree,Asserttreecmp);
}
else
Assert = tree2Assert(tree);
return Assert;
}
/**************************************************************************/
static bool runvm(struct a09 *a09,mc6809__t *cpu,struct vmcode *test)
{
assert(a09 != NULL);
assert(cpu != NULL);
assert(test != NULL);
struct testdata *data = cpu->user;
struct memprot prot;
uint16_t stack[15];
uint16_t result;
uint16_t value;
uint16_t addr;
size_t sp = sizeof(stack) / sizeof(stack[0]);
size_t ip = 0;
int rc;
/*--------------------------------------------------------------
; I control the code generation, so I can skip checks that would
; otherwise have to be made.
;---------------------------------------------------------------*/
while(true)
{
switch(test->prog[ip++])
{
case VM_LOR:
result = stack[sp + 1] || stack[sp];
stack[++sp] = result;
break;
case VM_LAND:
result = stack[sp + 1] && stack[sp];
stack[++sp] = result;
break;
case VM_GT:
result = stack[sp + 1] > stack[sp];
stack[++sp] = result;
break;
case VM_GE:
result = stack[sp + 1] >= stack[sp];
stack[++sp] = result;
break;
case VM_EQ:
result = stack[sp + 1] == stack[sp];
stack[++sp] = result;
break;
case VM_LE:
result = stack[sp + 1] <= stack[sp];
stack[++sp] = result;
break;
case VM_LT:
result = stack[sp + 1] < stack[sp];
stack[++sp] = result;
break;
case VM_NE:
result = stack[sp + 1] != stack[sp];
stack[++sp] = result;
break;
case VM_BOR:
result = stack[sp + 1] | stack[sp];
stack[++sp] = result;
break;
case VM_BEOR:
result = stack[sp + 1] ^ stack[sp];
stack[++sp] = result;
break;
case VM_BAND:
result = stack[sp + 1] & stack[sp];
stack[++sp] = result;
break;
case VM_SHR:
result = stack[sp + 1] >> stack[sp];
stack[++sp] = result;
break;
case VM_SHL:
result = stack[sp + 1] << stack[sp];
stack[++sp] = result;
break;
case VM_SUB:
result = stack[sp + 1] - stack[sp];
stack[++sp] = result;
break;
case VM_ADD:
result = stack[sp + 1] + stack[sp];
stack[++sp] = result;
break;
case VM_MUL:
result = stack[sp + 1] * stack[sp];
stack[++sp] = result;
break;
case VM_DIV:
if (stack[sp] == 0)
return message(a09,MSG_ERROR,"E0008: divide by 0 error");
result = stack[sp + 1] / stack[sp];
stack[++sp] = result;
break;
case VM_MOD:
if (stack[sp] == 0)
return message(a09,MSG_ERROR,"E0008: divide by 0 error");
result = stack[sp + 1] % stack[sp];
stack[++sp] = result;
break;
case VM_EXP:
if (stack[sp] > 0x7FFF)
return message(a09,MSG_ERROR,"E0091: negative exponents for integers not supported");
else if (stack[sp] == 0)
stack[++sp] = 1;
else
{
while(--stack[sp])
stack[sp+1] = stack[sp+1] * stack[sp+1];
result = stack[sp + 1];
stack[++sp] = result;
}
break;
case VM_NEG:
stack[sp] = -stack[sp];
break;
case VM_NOT:
stack[sp] = ~stack[sp];
break;
case VM_LIT:
stack[--sp] = test->prog[ip++];
break;
case VM_AT8:
addr = stack[sp];
stack[sp] = data->memory[addr];
break;
case VM_AT16:
addr = stack[sp];
stack[sp] = (data->memory[addr] << 8) | data->memory[addr + 1];
break;
case VM_CPUCC:
stack[--sp] = mc6809_cctobyte(cpu);
break;
case VM_CPUCCc:
stack[--sp] = cpu->cc.c;
break;
case VM_CPUCCv:
stack[--sp] = cpu->cc.v;
break;
case VM_CPUCCz:
stack[--sp] = cpu->cc.z;
break;
case VM_CPUCCn:
stack[--sp] = cpu->cc.n;
break;
case VM_CPUCCi:
stack[--sp] = cpu->cc.i;
break;
case VM_CPUCCh:
stack[--sp] = cpu->cc.h;
break;
case VM_CPUCCf:
stack[--sp] = cpu->cc.f;
break;
case VM_CPUCCe:
stack[--sp] = cpu->cc.e;
break;
case VM_CPUA:
stack[--sp] = cpu->A;
break;
case VM_CPUB:
stack[--sp] = cpu->B;
break;
case VM_CPUDP:
stack[--sp] = cpu->dp;
break;
case VM_CPUD:
stack[--sp] = cpu->d.w;
break;
case VM_CPUX:
stack[--sp] = cpu->X.w;
break;
case VM_CPUY:
stack[--sp] = cpu->Y.w;
break;
case VM_CPUU:
stack[--sp] = cpu->U.w;
break;
case VM_CPUS:
stack[--sp] = cpu->S.w;
break;
case VM_CPUPC:
stack[--sp] = cpu->pc.w;
break;
case VM_IDX:
stack[sp] += cpu->X.w;
break;
case VM_IDY:
stack[sp] += cpu->Y.w;
break;
case VM_IDS:
stack[sp] += cpu->S.w;
break;
case VM_IDU:
stack[sp] += cpu->U.w;
break;
case VM_SCMP:
{
uint16_t len = stack[sp++];
uint16_t dst = stack[sp++];
uint16_t src = stack[sp++];
rc = memcmp(&data->memory[src],&data->memory[dst],len);
stack[--sp] = 0;
if (rc < 0)
stack[--sp] = -1;
else if (rc > 0)
stack[--sp] = 1;
else
stack[--sp] = 0;
}
break;
case VM_SEX:
if (stack[sp] >= 0x80)
stack[sp] |= 0xFF00;
break;
case VM_TIMEON:
cpu->cycles = 0;
data->icount = 0;
break;
case VM_TIMEOFF:
if (a09->tapout)
printf("# ");
printf("%s: cycles=%lu instructions=%lu cpi=%.2f\n",test->tag,cpu->cycles,data->icount,(double)cpu->cycles/(double)data->icount);
break;
case VM_FALSE:
stack[--sp] = false;
break;
case VM_TRUE:
stack[--sp] = true;
break;
case VM_TO8:
addr = stack[sp++];
value = stack[sp++];
data->memory[addr] = value & 255;
break;
case VM_TO16:
addr = stack[sp++];
value = stack[sp++];
data->memory[addr] = value >> 8;
data->memory[addr + 1] = value & 255;
break;
case VM_PROT:
assert(sizeof(struct memprot) <= sizeof(enum vmops));
addr = stack[sp++];
value = stack[sp++];
memcpy(&prot,&stack[sp++],sizeof(prot));
for (size_t a = addr ; a <= value ; a++)
data->prot[a] = prot;
break;
case VM_EXIT:
assert(sp == (sizeof(stack) / sizeof(stack[0]) - 1));
return stack[sp] != 0;
}
}
}
/**************************************************************************/
static mc6809byte__t ft_cpu_read(mc6809__t *cpu,mc6809addr__t addr,bool inst)
{
assert(cpu != NULL);
assert(cpu->user != NULL);
(void)inst;
struct testdata *data = cpu->user;
if (!data->prot[addr].read)
{
snprintf(data->errbuf,sizeof(data->errbuf),"PC=%04X addr=%04X",cpu->instpc,addr);
longjmp(cpu->err,TEST_NON_READ_MEM);
}
if (inst && !data->prot[addr].exec)
{
snprintf(data->errbuf,sizeof(data->errbuf),"PC=%04X addr=%04X",cpu->instpc,addr);
longjmp(cpu->err,TEST_WEEDS);
}
return data->memory[addr];
}
/**************************************************************************/
static void ft_cpu_write(mc6809__t *cpu,mc6809addr__t addr,mc6809byte__t byte)
{
assert(cpu != NULL);
assert(cpu->user != NULL);
struct testdata *data = cpu->user;
if (!data->prot[addr].write)
{
snprintf(data->errbuf,sizeof(data->errbuf),"PC=%04X addr=%04X",cpu->instpc,addr);
longjmp(cpu->err,TEST_NON_WRITE_MEM);
}
if (data->prot[addr].exec)
message(data->a09,MSG_WARNING,"W0014: possible self-modifying code @ %04X",cpu->instpc);
if (data->prot[addr].tron)
message(data->a09,MSG_WARNING,"W0016: memory write of %02X to %04X @ %04X",byte,addr,cpu->instpc);
data->memory[addr] = byte;
}
/**************************************************************************/
static void ft_cpu_fault(mc6809__t *cpu,mc6809fault__t fault)
{
assert(cpu != NULL);
assert(cpu->user != NULL);
struct testdata *data = cpu->user;
snprintf(data->errbuf,sizeof(data->errbuf),"PC=%04X",cpu->instpc);
longjmp(cpu->err,fault);
}
/**************************************************************************/
static mc6809byte__t ft_dis_read(mc6809dis__t *dis,mc6809addr__t addr)
{
assert(dis != NULL);
assert(dis->user != NULL);
struct testdata *data = dis->user;
return data->memory[addr];
}
/**************************************************************************/
static void ft_dis_fault(mc6809dis__t *dis,mc6809fault__t fault)
{
assert(dis != NULL);
longjmp(dis->err,fault);
}
/**************************************************************************/
static int regsearch(void const *needle,void const *haystack)
{
label const *key = needle;
struct labeltable const *value = haystack;
int rc = memcmp(key->text,value->label.text,min(key->s,value->label.s));
if (rc == 0)
{
if (key->s < value->label.s)
rc = -1;
else if (key->s > value->label.s)
rc = 1;
}
return rc;
}
/**************************************************************************/
static struct labeltable const mregisters[] =
{
{ .label = { .text = "A" , .s = 1 } , .op = VM_CPUA } ,
{ .label = { .text = "B" , .s = 1 } , .op = VM_CPUB } ,
{ .label = { .text = "CC" , .s = 2 } , .op = VM_CPUCC } ,
{ .label = { .text = "CC.C" , .s = 4 } , .op = VM_CPUCCc } ,
{ .label = { .text = "CC.E" , .s = 4 } , .op = VM_CPUCCe } ,
{ .label = { .text = "CC.F" , .s = 4 } , .op = VM_CPUCCf } ,
{ .label = { .text = "CC.H" , .s = 4 } , .op = VM_CPUCCh } ,
{ .label = { .text = "CC.I" , .s = 4 } , .op = VM_CPUCCi } ,
{ .label = { .text = "CC.N" , .s = 4 } , .op = VM_CPUCCn } ,
{ .label = { .text = "CC.V" , .s = 4 } , .op = VM_CPUCCv } ,
{ .label = { .text = "CC.Z" , .s = 4 } , .op = VM_CPUCCz } ,
{ .label = { .text = "D" , .s = 1 } , .op = VM_CPUD } ,
{ .label = { .text = "DP" , .s = 2 } , .op = VM_CPUDP } ,
{ .label = { .text = "PC" , .s = 2 } , .op = VM_CPUPC } ,
{ .label = { .text = "S" , .s = 1 } , .op = VM_CPUS } ,
{ .label = { .text = "U" , .s = 1 } , .op = VM_CPUU } ,
{ .label = { .text = "X" , .s = 1 } , .op = VM_CPUX } ,
{ .label = { .text = "Y" , .s = 1 } , .op = VM_CPUY } ,
};
/**************************************************************************/
static bool ft_index_register(
enum vmops prog[static MAX_PROG],
size_t max,
size_t *pvip,
struct a09 *a09,
struct buffer *buffer,
int pass
)
{
assert(prog != NULL);
assert(max == MAX_PROG);
assert(pvip != NULL);
assert(*pvip < max);
assert(a09 != NULL);
assert(buffer != NULL);
assert(pass == 2);
struct labeltable const *vmreg;
label reg;
if (*pvip == max)
return message(a09,MSG_ERROR,"E0066: expression too complex");
skip_space(buffer);
buffer->ridx--;
if (!parse_label(®,buffer,a09,pass))
return false;
upper_label(®);
vmreg = bsearch(
®,
mregisters,
sizeof(mregisters)/sizeof(mregisters[0]),
sizeof(mregisters[0]),
regsearch
);
if (vmreg == NULL)
return message(a09,MSG_ERROR,"E0073: bad register");
switch(vmreg->op)
{
case VM_CPUX: prog[(*pvip)++] = VM_IDX; break;
case VM_CPUY: prog[(*pvip)++] = VM_IDY; break;
case VM_CPUS: prog[(*pvip)++] = VM_IDS; break;
case VM_CPUU: prog[(*pvip)++] = VM_IDU; break;
default: return message(a09,MSG_ERROR,"E0080: not an index register");
}
return true;
}
/**************************************************************************/
static bool ft_register(
enum vmops prog[static MAX_PROG],
size_t max,
size_t *pvip,
struct testdata *data,
struct a09 *a09,
struct buffer *buffer,
int pass
)
{
assert(prog != NULL);
assert(max == MAX_PROG);
assert(pvip != NULL);
assert(*pvip < max);
assert(a09 != NULL);
assert(buffer != NULL);
assert(pass == 2);
struct labeltable const *vmreg;
label reg;
char c;
bool earlycomma = false;
/*--------------------------------------------------
; handle "/,x" as if it was "/x", because it is.
;---------------------------------------------------*/
if (buffer->buf[buffer->ridx] == ',')
{
earlycomma = true;
buffer->ridx++;
}
if (parse_label(®,buffer,a09,pass))
{
upper_label(®);
vmreg = bsearch(
®,
mregisters,
sizeof(mregisters)/sizeof(mregisters[0]),
sizeof(mregisters[0]),
regsearch
);
/*----------------------------------------------------------------
; No register, so assume an expression, and then look for a comma,
; and then an index register.
;-----------------------------------------------------------------*/
if (vmreg == NULL)
{
if (!ft_expr(prog,max,pvip,data,a09,buffer,pass))
return false;
c = skip_space(buffer);
if (c != ',')
{
return earlycomma
? message(a09,MSG_ERROR,"E0082: missing index register")
: message(a09,MSG_ERROR,"E0023: missing expected comma")
;
}
return ft_index_register(prog,max,pvip,a09,buffer,pass);
}
/*---------------------------------------------------------------------
; We might have just a regiser, or the accum,index mode. Choose here.
; In either case, we compile a VM_CPUaccum op here.
;---------------------------------------------------------------------*/
if (*pvip == max)
return message(a09,MSG_ERROR,"E0066: expression too complex");
prog[(*pvip)++] = vmreg->op;
c = skip_space(buffer);
if (c == ',')
{
/*------------------------------------------------------------------
; If the label didn't specify 'A', 'B', or 'D', here, it's an error.
; If it's A or B, we need to sign extend it, so yet another VM op.
;-------------------------------------------------------------------*/
switch(vmreg->op)
{
case VM_CPUA:
case VM_CPUB:
if (*pvip == max)
return message(a09,MSG_ERROR,"E0066: expression too complex");
prog[(*pvip)++] = VM_SEX;
break;
case VM_CPUD:
break;
default: return message(a09,MSG_ERROR,"E0081: missing A, B, or D register");
}
return ft_index_register(prog,max,pvip,a09,buffer,pass);
}
else
buffer->ridx--;
}
else
{
if (!ft_expr(prog,max,pvip,data,a09,buffer,pass))
return false;
c = skip_space(buffer);
if (c != ',')
{
return earlycomma
? message(a09,MSG_ERROR,"E0082: missing index register")
: message(a09,MSG_ERROR,"E0023: missing expected comma")
;
}
return ft_index_register(prog,max,pvip,a09,buffer,pass);
}
return true;
}
/**************************************************************************/
static bool ft_value(
enum vmops prog[static MAX_PROG],
size_t max,
size_t *pvip,
struct testdata *data,
struct a09 *a09,
struct buffer *buffer,
int pass
)
{
assert(prog != NULL);
assert(max == MAX_PROG);
assert(pvip != NULL);
assert(*pvip < max);
assert(data != NULL);
assert(a09 != NULL);
assert(buffer != NULL);
assert(pass == 2);
uint16_t v;
bool neg = false;
bool not = false;
bool rc = true;
char c = skip_space(buffer);
if (c == '/')
return ft_register(prog,max,pvip,data,a09,buffer,pass);
if (*pvip >= max - 2)
return message(a09,MSG_ERROR,"E0074: not enough space for expression");
if (c == '-')
{
neg = true;
c = buffer->buf[buffer->ridx++];
}
else if (c == '~')
{
not = true;
c = buffer->buf[buffer->ridx++];
}
else if (c == '+')
c = buffer->buf[buffer->ridx++];
if (c == '$')
rc = s2num(a09,&v,buffer,16);
else if (c == '&')
rc = s2num(a09,&v,buffer,8);
else if (c == '%')
rc = s2num(a09,&v,buffer,2);
else if (isdigit(c))
{
buffer->ridx--;
rc = s2num(a09,&v,buffer,10);
}
else if ((c == '.') || (c == '.') || isalpha(c))
{
struct symbol *sym;
label label;
buffer->ridx--;
if (!parse_label(&label,buffer,a09,pass))
return false;
sym = symbol_find(a09,&label);
if (sym == NULL)
return message(a09,MSG_ERROR,"E0004: unknown symbol '%.*s'",label.s,label.text);
v = sym->value;
sym->refs++;
}
else if ((c == '"') || (c == '\''))
{
struct buffer text;
if (neg || not)
return message(a09,MSG_ERROR,"E0075: can't negate or complement a string");
if (!collect_esc_string(a09,&text,buffer,c))
return false;
data->sp -= text.widx;
memcpy(&data->memory[data->sp],text.buf,text.widx);
if (*pvip + 5 == max)
return message(a09,MSG_ERROR,"E0066: expression too complex");
prog[(*pvip)++] = VM_LIT;
prog[(*pvip)++] = data->sp;
prog[(*pvip)++] = VM_LIT;