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/* $KTH: sl.c,v 1.15 1997/10/19 23:12:40 assar Exp $ */
/*
* Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* 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.
*
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the Kungliga Tekniska
* Högskolan and its contributors.
*
* 4. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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 "sl_locl.h"
static SL_cmd *
sl_match (SL_cmd *cmds, char *cmd, int exactp)
{
SL_cmd *c, *current = NULL, *partial_cmd = NULL;
int partial_match = 0;
for (c = cmds; c->name; ++c) {
if (c->func)
current = c;
if (strcmp (cmd, c->name) == 0)
return current;
else if (strncmp (cmd, c->name, strlen(cmd)) == 0 &&
partial_cmd != current) {
++partial_match;
partial_cmd = current;
}
}
if (partial_match == 1 && !exactp)
return partial_cmd;
else
return NULL;
}
void
sl_help (SL_cmd *cmds, int argc, char **argv)
{
SL_cmd *c, *prev_c;
if (argc == 1) {
prev_c = NULL;
for (c = cmds; c->name; ++c) {
if (c->func) {
if(prev_c)
printf ("\n\t%s%s", prev_c->usage ? prev_c->usage : "",
prev_c->usage ? "\n" : "");
prev_c = c;
printf ("%s", c->name);
} else
printf (", %s", c->name);
}
if(prev_c)
printf ("\n\t%s%s", prev_c->usage ? prev_c->usage : "",
prev_c->usage ? "\n" : "");
} else {
c = sl_match (cmds, argv[1], 0);
if (c == NULL)
printf ("No such command: %s. "
"Try \"help\" for a list of all commands\n",
argv[1]);
else {
printf ("%s\t%s", c->name, c->usage);
if(c->help && *c->help)
printf ("%s\n", c->help);
if((++c)->name && c->func == NULL) {
printf ("\nSynonyms:");
while (c->name && c->func == NULL)
printf ("\t%s", (c++)->name);
}
printf ("\n");
}
}
}
static char *
readline(char *prompt)
{
char buf[BUFSIZ];
printf ("%s", prompt);
fflush (stdout);
if(fgets(buf, sizeof(buf), stdin) == NULL)
return NULL;
if (buf[strlen(buf) - 1] == '\n')
buf[strlen(buf) - 1] = '\0';
return strdup(buf);
}
static void
add_history(char *p)
{
}
int
sl_command(SL_cmd *cmds, int argc, char **argv)
{
SL_cmd *c;
c = sl_match (cmds, argv[0], 0);
if (c == NULL)
return -1;
return (*c->func)(argc, argv);
}
int
sl_loop (SL_cmd *cmds, char *prompt)
{
unsigned max_count;
char **ptr;
int ret;
max_count = 17;
ptr = malloc(max_count * sizeof(*ptr));
if (ptr == NULL) {
printf ("sl_loop: failed to allocate %u bytes of memory\n",
(int) max_count * sizeof(*ptr));
return -1;
}
for (;;) {
char *buf;
unsigned count;
SL_cmd *c;
ret = 0;
buf = readline(prompt);
if(buf == NULL)
break;
if(*buf)
add_history(buf);
count = 0;
{
char *foo = NULL;
char *p;
for(p = strtok_r (buf, " \t", &foo);
p;
p = strtok_r (NULL, " \t", &foo)) {
if(count == max_count) {
max_count *= 2;
ptr = realloc (ptr, max_count * sizeof(*ptr));
if (ptr == NULL) {
printf ("sl_loop: failed to allocate %u "
"bytes of memory\n",
(unsigned) max_count * sizeof(*ptr));
return -1;
}
}
ptr[count++] = p;
}
}
if (count > 0) {
c = sl_match (cmds, ptr[0], 0);
if (c) {
ret = (*c->func)(count, ptr);
if (ret != 0) {
free (buf);
buf = NULL;
break;
}
} else
printf ("Unrecognized command: %s\n", ptr[0]);
}
free(buf);
buf = NULL;
}
free (ptr);
ptr = NULL;
return 0;
}
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