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/* $Id: plugin_string.c 840 2007-09-09 12:17:42Z michael $
* $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/plugin_string.c $
*
* string plugin
*
* Copyright (C) 2003, 2004 Michael Reinelt <michael@reinelt.co.at>
* Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
*
* This file is part of LCD4Linux.
*
* LCD4Linux 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 2, or (at your option)
* any later version.
*
* LCD4Linux 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
* exported functions:
*
* int plugin_init_string (void)
* adds some handy string functions
*
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include "debug.h"
#include "plugin.h"
static void my_strlen(RESULT * result, RESULT * arg1)
{
double value = strlen(R2S(arg1));
SetResult(&result, R_NUMBER, &value);
}
/* 'upcase' function (shamelessly stolen from plugin_sample.c)*/
/* returns the string in upper case letters */
static void my_strupper(RESULT * result, RESULT * arg1)
{
char *value, *p;
value = strdup(R2S(arg1));
for (p = value; *p != '\0'; p++)
*p = toupper(*p);
SetResult(&result, R_STRING, value);
free(value);
}
static void my_strstr(RESULT * result, RESULT * arg1, RESULT * arg2)
{
char *p;
double value;
char *haystack = R2S(arg1);
char *needle = R2S(arg2);
p = strstr(haystack, needle);
if (p == NULL) {
value = -1;
} else {
value = p - haystack;
}
SetResult(&result, R_NUMBER, &value);
}
static void my_substr(RESULT * result, int argc, RESULT * argv[])
{
char *str, *p1, *p2;
int pos, len;
if (argc < 2 || argc > 3) {
error("substr(): wrong number of parameters");
SetResult(&result, R_STRING, "");
return;
}
str = strdup(R2S(argv[0]));
pos = R2N(argv[1]);
if (pos < 0)
pos = 0;
if (argc == 3) {
len = R2N(argv[2]);
if (len < 0)
len = 0;
} else {
len = -1;
}
p1 = str;
while (pos > 0 && *p1 != '\0') {
p1++;
pos--;
}
if (len >= 0) {
p2 = p1;
while (len > 0 && *p2 != '\0') {
p2++;
len--;
}
*p2 = '\0';
}
SetResult(&result, R_STRING, p1);
free(str);
}
int plugin_init_string(void)
{
/* register some basic string functions */
AddFunction("strlen", 1, my_strlen);
AddFunction("strupper", 1, my_strupper);
AddFunction("strstr", 2, my_strstr);
AddFunction("substr", -1, my_substr);
return 0;
}
void plugin_exit_string(void)
{
/* empty */
}
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