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/* $OpenBSD: varname.c,v 1.7 2023/09/04 11:35:11 espie Exp $ */
/*
* Copyright (c) 2001 Marc Espie.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
* PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdlib.h>
#include "defines.h"
#include "var.h"
#include "buf.h"
#include "varname.h"
const char *
VarName_Get(const char *start, struct Name *name, SymTable *ctxt, bool err,
const char *(*cont)(const char *))
{
const char *p;
size_t len;
p = cont(start);
if (*p != '$') {
name->s = start;
name->e = p;
name->tofree = false;
return p;
} else {
BUFFER buf;
Buf_Init(&buf, MAKE_BSIZE);
for (;;) {
Buf_Addi(&buf, start, p);
if (*p != '$') {
name->s = (const char *)Buf_Retrieve(&buf);
name->e = name->s + Buf_Size(&buf);
name->tofree = true;
return p;
}
start = p;
Var_ParseBuffer(&buf, start, ctxt, err, &len);
start += len;
p = cont(start);
}
}
}
void
VarName_Free(struct Name *name)
{
if (name->tofree)
free((char *)name->s);
}
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