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Added $display %m support, fixed mem leak in $display, fixes #128

This commit is contained in:
Clifford Wolf 2016-03-19 11:51:13 +01:00
parent ff5c61b120
commit e5d42ebb4d
1 changed files with 44 additions and 20 deletions
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46
frontends/ast/simplify.cc
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@ -193,13 +193,13 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
// but should be good enough for most uses
if ((type == AST_TCALL) && ((str == "$display") || (str == "$write")))
{
size_t nargs = GetSize(children);
int nargs = GetSize(children);
if (nargs < 1)
log_error("System task `%s' got %d arguments, expected >= 1 at %s:%d.\n",
str.c_str(), int(children.size()), filename.c_str(), linenum);
// First argument is the format string
AstNode *node_string = children[0]->clone();
AstNode *node_string = children[0];
while (node_string->simplify(true, false, false, stage, width_hint, sign_hint, false)) { }
if (node_string->type != AST_CONSTANT)
log_error("Failed to evaluate system task `%s' with non-constant 1st argument at %s:%d.\n", str.c_str(), filename.c_str(), linenum);
@ -207,7 +207,7 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
// Other arguments are placeholders. Process the string as we go through it
std::string sout;
size_t next_arg = 1;
int next_arg = 1;
for (size_t i = 0; i < sformat.length(); i++)
{
// format specifier
@ -226,17 +226,37 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
continue;
}
// If we're out of arguments, that's a problem!
if(next_arg >= nargs)
log_error("System task `%s' called with more format specifiers than arguments at %s:%d.\n", str.c_str(), filename.c_str(), linenum);
// Simplify the argument
AstNode *node_arg = children[next_arg ++]->clone();
AstNode *node_arg = nullptr;
// Everything from here on depends on the format specifier
switch (cformat)
{
case 's':
case 'S':
case 'd':
case 'D':
case 'x':
case 'X':
if (next_arg >= GetSize(children))
log_error("Missing argument for %%%c format specifier in system task `%s' at %s:%d.\n",
cformat, str.c_str(), filename.c_str(), linenum);
node_arg = children[next_arg++];
while (node_arg->simplify(true, false, false, stage, width_hint, sign_hint, false)) { }
if (node_arg->type != AST_CONSTANT)
log_error("Failed to evaluate system task `%s' with non-constant argument at %s:%d.\n", str.c_str(), filename.c_str(), linenum);
break;
case 'm':
case 'M':
break;
default:
log_error("System task `%s' called with invalid/unsupported format specifier at %s:%d.\n", str.c_str(), filename.c_str(), linenum);
break;
}
// Everything from here on depends on the format specifier
switch (cformat)
{
case 's':
@ -262,9 +282,13 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
}
break;
default:
log_error("System task `%s' called with invalid format specifier at %s:%d.\n", str.c_str(), filename.c_str(), linenum);
case 'm':
case 'M':
sout += log_id(current_module->name);
break;
default:
log_abort();
}
}