/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
 * Use is subject to license terms.
 */

/*
 *      macro.cc
 *
 *      Handle expansion of make macros
 */

/*
 * Included files
 */
#include <mk/defs.h>
#include <mksh/macro.h>         /* getvar(), expand_value() */
#include <mksh/misc.h>          /* getmem() */

/*
 * Defined macros
 */

/*
 * typedefs & structs
 */

/*
 * Static variables
 */

/*
 * File table of contents
 */

void
setvar_append(Name name, Name value)
{
        Property        macro_apx = get_prop(name->prop, macro_append_prop);
        Property        macro = get_prop(name->prop, macro_prop);
        int                     length;
        String_rec              destination;
        wchar_t                 buffer[STRING_BUFFER_LENGTH];
        Chain           chain;
        Name                    val = NULL;

        if(macro_apx == NULL) {
                macro_apx = append_prop(name, macro_append_prop);
                if(macro != NULL) {
                        macro_apx->body.macro_appendix.value = macro->body.macro.value;
                }
        }

        val = macro_apx->body.macro_appendix.value_to_append;

        INIT_STRING_FROM_STACK(destination, buffer);
        buffer[0] = 0;
        if (val != NULL) {
                APPEND_NAME(val,
                              &destination,
                              (int) val->hash.length);
                if (value != NULL) {
                        MBTOWC(wcs_buffer, " ");
                        append_char(wcs_buffer[0], &destination);
                }
        }
        if (value != NULL) {
                APPEND_NAME(value,
                              &destination,
                              (int) value->hash.length);
        }
        value = GETNAME(destination.buffer.start, FIND_LENGTH);
        if (destination.free_after_use) {
                retmem(destination.buffer.start);
        }
        macro_apx->body.macro_appendix.value_to_append = value;

        SETVAR(name, empty_name, true);
}

/*
 *      setvar_envvar()
 *
 *      This function scans the list of environment variables that have
 *      dynamic values and sets them.
 *
 *      Parameters:
 *
 *      Global variables used:
 *              envvar          A list of environment vars with $ in value
 */
void
setvar_envvar(void)
{
        wchar_t                 buffer[STRING_BUFFER_LENGTH];
        int                     length;
        char    *mbs, *tmp_mbs_buffer = NULL;
        char    *env, *tmp_mbs_buffer2 = NULL;
        Envvar                  p;
        String_rec              value;

        for (p = envvar; p != NULL; p = p->next) {
                if (p->already_put
                    ) {
                        continue;
                }
                INIT_STRING_FROM_STACK(value, buffer);
                expand_value(p->value, &value, false);
                if ((length = wcslen(value.buffer.start)) >= MAXPATHLEN) {
                        mbs = tmp_mbs_buffer = getmem((length + 1) * MB_LEN_MAX);
                        (void) wcstombs(mbs,
                                        value.buffer.start,
                                        (length + 1) * MB_LEN_MAX);
                } else {
                        mbs = mbs_buffer;
                        WCSTOMBS(mbs, value.buffer.start);
                }
                length = 2 + strlen(p->name->string_mb) + strlen(mbs);
                if (!p->already_put || length > (MAXPATHLEN * MB_LEN_MAX)) {
                        env = tmp_mbs_buffer2 = getmem(length);
                } else {
                        env = mbs_buffer2;
                }
                (void) sprintf(env,
                               "%s=%s",
                               p->name->string_mb,
                               mbs);
                if (!p->already_put) {
                        (void) putenv(env);
                        p->already_put = true;
                        if (p->env_string) {
                                retmem_mb(p->env_string);
                        }
                        p->env_string = env;
                        tmp_mbs_buffer2 = NULL; // We should not return this memory now
                }
                if (tmp_mbs_buffer2) {
                        retmem_mb(tmp_mbs_buffer2);
                        tmp_mbs_buffer2 = NULL;
                }
                if (tmp_mbs_buffer) {
                        retmem_mb(tmp_mbs_buffer);
                        tmp_mbs_buffer = NULL;
                }
        }
}