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Code Issues 48 Pull Requests Releases Wiki Activity

Copy and free funcall tokens 

Again, even though there is not as of yet any way to create them
This commit is contained in:
Glen Whitney 2019-08-04 10:39:20 -04:00
parent d6b4adfc8c
commit b0e989d848
1 changed files with 51 additions and 21 deletions
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72
src/common/eval.c
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@ -38,10 +38,21 @@ Token tcopy(Token n)
Token result;
/*}}}*/
result=n;
if (result.type==STRING) result.u.string=strcpy(malloc(strlen(n.u.string)+1),n.u.string);
else if (result.type==EEK) result.u.err=strcpy(malloc(strlen(n.u.err)+1),n.u.err);
else if (result.type==LIDENT) result.u.lident=strcpy(malloc(strlen(n.u.lident)+1),n.u.lident);
result = n;
switch (n.type) {
case STRING: result.u.string = strdup(n.u.string); break;
case LIDENT: result.u.lident = strdup(n.u.lident); break;
case FUNCALL:
if (n.u.funcall.argc > 0)
{
result.u.funcall.argv = malloc(n.u.funcall.argc*sizeof(Token));
for (size_t ai = 0; ai < n.u.funcall.argc; ++ai)
result.u.funcall.argv[ai] = tcopy(n.u.funcall.argv[ai]);
}
break;
case EEK: result.u.err = strdup(n.u.err); break;
default: break;
}
return result;
}
/*}}}*/
@ -58,23 +69,42 @@ void tfree(Token *n)
/* tfree_protected -- free dynamic data of token but not if same as protected */ /*{{{*/
void tfree_protected(Token *n, const Token dontfree)
{
if (n->type == STRING &&
(dontfree.type != STRING || n->u.string != dontfree.u.string))
{
free(n->u.string);
n->u.string=(char*)0;
}
else if (n->type == EEK &&
(dontfree.type != EEK || n->u.err != dontfree.u.err))
{
free(n->u.err);
n->u.err=(char*)0;
}
else if (n->type==LIDENT &&
(dontfree.type != LIDENT || n->u.lident != dontfree.u.lident))
{
free(n->u.lident);
n->u.lident=(char*)0;
bool difftype = (dontfree.type != n->type);
switch (n->type) {
case STRING:
if (difftype || n->u.string != dontfree.u.string)
{
free(n->u.string);
n->u.string=(char*)0;
}
break;
case LIDENT:
if (difftype || n->u.lident != dontfree.u.lident)
{
free(n->u.lident);
n->u.lident=(char*)0;
}
break;
case FUNCALL:
if (difftype || n->u.funcall.argv != dontfree.u.funcall.argv)
{
for (int ai = 0; ai < n->u.funcall.argc; ++ai)
tfree_protected(n->u.funcall.argv + ai, dontfree);
if (n->u.funcall.argv != NULLTOKEN) {
free(n->u.funcall.argv);
n->u.funcall.argv = NULLTOKEN;
}
}
break;
case EEK:
if (difftype || n->u.err != dontfree.u.err)
{
free(n->u.err);
n->u.err=(char*)0;
}
break;
default:
break;
}
}
/*}}}*/