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fixed expression parser bug : ~(1|2) returned 0xfe

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curt mayer
2020-02-26 15:05:26 -08:00
parent 621083947c
commit fcc736bd45
1 changed files with 6 additions and 2 deletions
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8
Tools/unix/uz80as/expr.c
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@@ -156,7 +156,7 @@ static int ashr(int r, int n)
const char *expr(const char *p, int *v, int linepc, int allowfr,
enum expr_ecode *ecode, const char **ep)
{
int si, usi;
int si, usi, usl;
const char *q;
char last;
int stack[ESTKSZ2];
@@ -172,6 +172,7 @@ const char *expr(const char *p, int *v, int linepc, int allowfr,
si = 0;
r = 0;
last = 'V'; /* first void */
usl = 0;
loop:
p = skipws(p);
if (*p == '(') {
@@ -184,6 +185,8 @@ loop:
}
stack[si++] = last;
stack[si++] = r;
stack[si++] = usl;
usl = usi;
p++;
r = 0;
last = 'v'; /* void */
@@ -197,6 +200,7 @@ loop:
} else {
p++;
n = r;
usl = stack[--si];
r = stack[--si];
last = (char) stack[--si];
goto oper;
@@ -396,7 +400,7 @@ uoper:
uopstk[usi++] = *p++;
goto loop;
oper:
while (usi > 0) {
while (usi > usl) {
usi--;
switch (uopstk[usi]) {
case '~': n = ~n; break;