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Deal with CASE a OF 10 .. MAX(CARDINAL) ... and things like that

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ceriel 1991-10-29 09:18:46 +00:00
parent dd99f952d5
commit cfe45c4e2a
1 changed files with 41 additions and 3 deletions
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44
lang/m2/comp/casestat.C
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@ -270,13 +270,51 @@ AddOneCase(sh, lnode, rnode, lbl)
register struct case_entry *ce = new_case_entry();
register struct case_entry *c1 = sh->sh_entries, *c2 = 0;
int fund = sh->sh_type->tp_fund;
arith diff;
ce->ce_label = lbl;
ce->ce_low = lnode->nd_INT;
ce->ce_up = rnode->nd_INT;
if (! ChkCompat(&lnode, sh->sh_type, "case") ||
! ChkCompat(&rnode, sh->sh_type, "case")) {
}
diff = rnode->nd_INT - lnode->nd_INT;
#define MAXRANGE 100
if (diff < 0 || diff > MAXRANGE) {
/* This is a bit of a hack, but it prevents the compiler
from crashing on things like
CASE a OF
10 .. MAX(CARDINAL): ....
If the range covers more than MAXRANGE cases, this case
is dealt with separately.
*/
label cont = ++text_label;
C_dup(int_size);
C_loc(lnode->nd_INT);
if (fund == T_INTEGER) {
C_blt(cont);
}
else {
C_cmu(int_size);
C_zlt(cont);
}
C_dup(int_size);
C_loc(rnode->nd_INT);
if (fund == T_INTEGER) {
C_bgt(cont);
}
else {
C_cmu(int_size);
C_zgt(cont);
}
C_asp(int_size);
C_bra(lbl);
C_df_ilb(cont);
free_case_entry(ce);
return;
}
ce->ce_label = lbl;
ce->ce_low = lnode->nd_INT;
ce->ce_up = rnode->nd_INT;
if (sh->sh_entries == 0) {
/* first case entry
*/