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/*
* command.c
*
* Copyright © 2019 Thomas White <taw@bitwiz.me.uk>
*
* This file is part of NanoLight.
*
* NanoLight is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <libintl.h>
#define _(x) gettext(x)
#include "lightctx.h"
enum token_type
{
TK_FIXTURE,
TK_AT,
TK_DOT,
TK_TO,
TK_LEVEL,
TK_ATTRIBUTE,
};
struct token
{
enum token_type type;
int fixture_index;
int attribute;
int val;
};
/* Tables for converting between attribute class numbers and names */
const char *attr_class_names[] = {
"int",
};
int attr_classes[] = {
INTENSITY,
};
int n_attr_classes = 1;
/* (end of attribute tables) */
static int stop_char(char c)
{
if ( c == '@' ) return 1;
if ( c == ' ' ) return 1;
if ( c == '\0' ) return 1;
if ( c == '.' ) return 1;
if ( c == '-' ) return 1;
return 0;
}
static int find_tokens(const char *cmd, struct token *tokens, struct lightctx *nl)
{
int i;
int n = 0;
int pos = 0;
do {
int start;
char *word;
unsigned long val;
char *endptr;
int done = 0;
while ( isspace(cmd[pos]) ) pos++;
start = pos;
/* Is it an AT? */
if ( cmd[pos] == '@' ) {
tokens[n++].type = TK_AT;
pos++;
continue;
}
/* Is it a dot? */
if ( cmd[pos] == '.' ) {
tokens[n++].type = TK_DOT;
pos++;
continue;
}
/* Is it a dash? */
if ( cmd[pos] == '-' ) {
tokens[n++].type = TK_TO;
pos++;
continue;
}
while ( !stop_char(cmd[pos]) ) pos++;
word = strndup(cmd+start, pos-start);
/* Is is a fixture name? */
for ( i=0; i<nl->n_fixtures; i++ ) {
if ( strcasecmp(nl->fixtures[i].label, word) == 0 ) {
tokens[n].fixture_index = i;
tokens[n++].type = TK_FIXTURE;
done = 1;
break;
}
}
/* Is is an attribute name? */
for ( i=0; i<n_attr_classes; i++ ) {
if ( strcasecmp(attr_class_names[i], word) == 0 ) {
tokens[n].attribute = attr_classes[i];
tokens[n++].type = TK_ATTRIBUTE;
done = 1;
break;
}
}
/* Is it a number? */
val = strtoul(word, &endptr, 10);
if ( (word[0] != '\0') && (endptr[0] == '\0') ) {
tokens[n].val = val;
tokens[n++].type = TK_LEVEL;
done = 1;
}
free(word);
if ( !done ) return 0;
} while ( cmd[pos] != '\0' );
return n;
}
static const char *str_attr(int att)
{
switch ( att ) {
case INTENSITY : return "intensity";
}
return "???";
}
static void show_tokens(struct token *tokens, int n, struct lightctx *nl)
{
int i;
for ( i=0; i<n; i++ ) {
switch ( tokens[i].type ) {
case TK_FIXTURE:
printf(" [fixture:%s]", nl->fixtures[tokens[i].fixture_index].label);
break;
case TK_AT:
printf(" [@]");
break;
case TK_DOT:
printf(" [.]");
break;
case TK_TO:
printf(" [-]");
break;
case TK_LEVEL:
printf(" [value:%i]", tokens[i].val);
break;
case TK_ATTRIBUTE:
printf(" [attr:%s]", str_attr(tokens[i].attribute));
break;
}
}
printf("\n");
}
static void set_level(struct lightctx *nl, int val)
{
int i;
for ( i=0; i<nl->n_sel; i++ ) {
struct fixture *fix = &nl->fixtures[nl->selection[i]];
fix->v.intensity = (float)val/100.0;
}
}
int command_run(const char *cmd, struct lightctx *nl)
{
struct token tokens[1024];
int i, n;
n = find_tokens(cmd, tokens, nl);
if ( n == 0 ) return 1;
show_tokens(tokens, n, nl);
i = 0;
if ( tokens[i].type == TK_FIXTURE ) {
nl->n_sel = 0;
for ( i=0; i<n; i++ ) {
if ( tokens[i].type == TK_FIXTURE ) {
nl->selection[nl->n_sel++] = tokens[i].fixture_index;
} else {
break;
}
}
}
if ( tokens[i].type == TK_AT ) {
if ( tokens[i+1].type == TK_LEVEL ) {
set_level(nl, tokens[i+1].val);
}
}
return 0;
}
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