/* $Id$
 * $URL$
 *
 * 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 */
}
59bffa9e118&amp;showmsg=1&amp;follow=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
<tr><td><span title='2000-08-09 11:03:07 +0000'>2000-08-09</span></td><td><a href='/lcd4linux.git/commit/system.c?h=master&amp;id=fc2a80a97829537355a889ed4bf564ca5b6a9c75&amp;follow=1'>[lcd4linux @ 2000-08-09 11:03:07 by reinelt]</a></td><td>reinelt</td><td>1</td><td><span class='deletions'>-13</span>/<span class='insertions'>+28</span></td></tr>
<tr><td><span title='2000-08-09 09:50:29 +0000'>2000-08-09</span></td><td><a href='/lcd4linux.git/commit/system.c?h=master&amp;id=1645d61018c24013525f3953613aaea56714bab4&amp;follow=1'>[lcd4linux @ 2000-08-09 09:50:29 by reinelt]</a></td><td>reinelt</td><td>13</td><td><span class='deletions'>-127</span>/<span class='insertions'>+204</span></td></tr>
<tr><td><span title='2000-07-31 10:43:44 +0000'>2000-07-31</span></td><td><a href='/lcd4linux.git/commit/udelay.c?h=master&amp;id=7ff246c0458df37567dcefebfd9a720f9b98cdb7&amp;follow=1'>[lcd4linux @ 2000-07-31 10:43:44 by reinelt]</a></td><td>reinelt</td><td>8</td><td><span class='deletions'>-91</span>/<span class='insertions'>+235</span></td></tr>
<tr><td><span title='2000-07-31 06:46:35 +0000'>2000-07-31</span></td><td><a href='/lcd4linux.git/commit/cfg.c?h=master&amp;id=5369cdf6f69abc9a33581e8209f4fc1d2ea468f1&amp;follow=1'>[lcd4linux @ 2000-07-31 06:46:35 by reinelt]</a></td><td>reinelt</td><td>4</td><td><span class='deletions'>-5</span>/<span class='insertions'>+15</span></td></tr>
<tr><td><span title='2000-06-04 21:43:50 +0000'>2000-06-04</span></td><td><a href='/lcd4linux.git/commit/Crystalfontz.c?h=master&amp;id=1e6198b7be4ecc45b8c62d814df8559163e9712c&amp;follow=1'>[lcd4linux @ 2000-06-04 21:43:50 by herp]</a></td><td>herp</td><td>1</td><td><span class='deletions'>-2</span>/<span class='insertions'>+9</span></td></tr>
<tr><td><span title='2000-05-21 06:20:35 +0000'>2000-05-21</span></td><td><a href='/lcd4linux.git/commit/system.h?h=master&amp;id=2c5d16713862968233858a2430deb67fd485078a&amp;follow=1'>[lcd4linux @ 2000-05-21 06:20:35 by reinelt]</a></td><td>reinelt</td><td>7</td><td><span class='deletions'>-35</span>/<span class='insertions'>+148</span></td></tr>
<tr><td><span title='2000-05-03 17:14:51 +0000'>2000-05-03</span></td><td><a href='/lcd4linux.git/commit/Crystalfontz.c?h=master&amp;id=4b2b6ee2f0eed08a6e9117d343360e778734f26e&amp;follow=1'>[lcd4linux @ 2000-05-03 17:14:51 by herp]</a></td><td>herp</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2000-05-03 09:37:32 +0000'>2000-05-03</span></td><td><a href='/lcd4linux.git/commit/README.Crystalfontz?h=master&amp;id=1df2f43206a2cb86e2792d8315b5e14f269ed83f&amp;follow=1'>[lcd4linux @ 2000-05-03 09:37:32 by herp]</a></td><td>herp</td><td>3</td><td><span class='deletions'>-0</span>/<span class='insertions'>+658</span></td></tr>
<tr><td><span title='2000-05-02 23:07:48 +0000'>2000-05-02</span></td><td><a href='/lcd4linux.git/commit/display.c?h=master&amp;id=6373b1b0c309ef99f98295cfc70b5411c96afce2&amp;follow=1'>[lcd4linux @ 2000-05-02 23:07:48 by herp]</a></td><td>herp</td><td>4</td><td><span class='deletions'>-15</span>/<span class='insertions'>+24</span></td></tr>
<tr><td><span title='2000-05-02 06:05:00 +0000'>2000-05-02</span></td><td><a href='/lcd4linux.git/commit/lcd4linux.conf.sample?h=master&amp;id=23a1214b15e7750a9cd0b849c394ba90824bd638&amp;follow=1'>[lcd4linux @ 2000-05-02 06:05:00 by reinelt]</a></td><td>reinelt</td><td>5</td><td><span class='deletions'>-7</span>/<span class='insertions'>+312</span></td></tr>
<tr><td><span title='2000-04-30 06:40:42 +0000'>2000-04-30</span></td><td><a href='/lcd4linux.git/commit/lcd4linux.conf.sample?h=master&amp;id=e6cc895f5d708709e837a4735a83b922b8328e69&amp;follow=1'>[lcd4linux @ 2000-04-30 06:40:42 by reinelt]</a></td><td>reinelt</td><td>2</td><td><span class='deletions'>-17</span>/<span class='insertions'>+37</span></td></tr>
<tr><td><span title='2000-04-28 05:19:55 +0000'>2000-04-28</span></td><td><a href='/lcd4linux.git/commit/display.c?h=master&amp;id=c501b39d5995b0dc42468f75172f35aa12244772&amp;follow=1'>[lcd4linux @ 2000-04-28 05:19:55 by reinelt]</a></td><td>reinelt</td><td>5</td><td><span class='deletions'>-12</span>/<span class='insertions'>+554</span></td></tr>
<tr><td><span title='2000-04-20 05:48:42 +0000'>2000-04-20</span></td><td><a href='/lcd4linux.git/commit/Makefile.in?h=master&amp;id=9382c096f395f353bdd47f3c16fe899cad540734&amp;follow=1'>[lcd4linux @ 2000-04-20 05:48:42 by reinelt]</a></td><td>reinelt</td><td>2</td><td><span class='deletions'>-0</span>/<span class='insertions'>+18</span></td></tr>
<tr><td><span title='2000-04-19 04:44:20 +0000'>2000-04-19</span></td><td><a href='/lcd4linux.git/commit/README.HD44780?h=master&amp;id=6b0b31cdb7d5dc8bf2d80978066e20900c5e55ba&amp;follow=1'>[lcd4linux @ 2000-04-19 04:44:20 by reinelt]</a></td><td>reinelt</td><td>1</td><td><span class='deletions'>-2</span>/<span class='insertions'>+2</span></td></tr>
<tr><td><span title='2000-04-17 05:14:27 +0000'>2000-04-17</span></td><td><a href='/lcd4linux.git/commit/lcd4linux.conf.sample?h=master&amp;id=b8d1fec4ab4011a52dad5afb82ab339baf5df31e&amp;follow=1'>[lcd4linux @ 2000-04-17 05:14:27 by reinelt]</a></td><td>reinelt</td><td>3</td><td><span class='deletions'>-5</span>/<span class='insertions'>+119</span></td></tr>
<tr><td><span title='2000-04-15 16:56:52 +0000'>2000-04-15</span></td><td><a href='/lcd4linux.git/commit/udelay.h?h=master&amp;id=c8f4049a367f0384549b5c5907603222370664cb&amp;follow=1'>[lcd4linux @ 2000-04-15 16:56:52 by reinelt]</a></td><td>reinelt</td><td>7</td><td><span class='deletions'>-58</span>/<span class='insertions'>+197</span></td></tr>
<tr><td><span title='2000-04-15 11:56:35 +0000'>2000-04-15</span></td><td><a href='/lcd4linux.git/commit/system.c?h=master&amp;id=5843f20a9d5e4d6840fa92f239258b11297cb36c&amp;follow=1'>[lcd4linux @ 2000-04-15 11:56:35 by reinelt]</a></td><td>reinelt</td><td>4</td><td><span class='deletions'>-10</span>/<span class='insertions'>+60</span></td></tr>
<tr><td><span title='2000-04-15 11:13:54 +0000'>2000-04-15</span></td><td><a href='/lcd4linux.git/commit/processor.c?h=master&amp;id=24f64dfa553a9b713aeb3c1a1f1592ab7973f85e&amp;follow=1'>[lcd4linux @ 2000-04-15 11:13:54 by reinelt]</a></td><td>reinelt</td><td>10</td><td><span class='deletions'>-28</span>/<span class='insertions'>+144</span></td></tr>
<tr><td><span title='2000-04-13 06:09:52 +0000'>2000-04-13</span></td><td><a href='/lcd4linux.git/commit/system.h?h=master&amp;id=6dfd10e9f5aef7c0411aaf0c0de775a3c011e33a&amp;follow=1'>[lcd4linux @ 2000-04-13 06:09:52 by reinelt]</a></td><td>reinelt</td><td>5</td><td><span class='deletions'>-54</span>/<span class='insertions'>+126</span></td></tr>
<tr><td><span title='2000-04-12 08:05:45 +0000'>2000-04-12</span></td><td><a href='/lcd4linux.git/commit/lcd4linux.conf.sample?h=master&amp;id=73ffb61bfcbbba0abaeb26912a7408c4e0d143ab&amp;follow=1'>[lcd4linux @ 2000-04-12 08:05:45 by reinelt]</a></td><td>reinelt</td><td>6</td><td><span class='deletions'>-24</span>/<span class='insertions'>+535</span></td></tr>
<tr><td><span title='2000-04-10 04:40:53 +0000'>2000-04-10</span></td><td><a href='/lcd4linux.git/commit/lcd4linux.c?h=master&amp;id=66d30deaa9b4b9bb575560b69e811265eebbffec&amp;follow=1'>[lcd4linux @ 2000-04-10 04:40:53 by reinelt]</a></td><td>reinelt</td><td>5</td><td><span class='deletions'>-31</span>/<span class='insertions'>+65</span></td></tr>
<tr><td><span title='2000-04-07 05:42:20 +0000'>2000-04-07</span></td><td><a href='/lcd4linux.git/commit/lock.h?h=master&amp;id=a3e3fa4aafc6404907419bf9652a32cc1d7d54cf&amp;follow=1'>[lcd4linux @ 2000-04-07 05:42:20 by reinelt]</a></td><td>reinelt</td><td>6</td><td><span class='deletions'>-17</span>/<span class='insertions'>+266</span></td></tr>
<tr><td><span title='2000-04-05 05:58:36 +0000'>2000-04-05</span></td><td><a href='/lcd4linux.git/commit/configure.in?h=master&amp;id=ef1af83c23834f8e4ee75fde0395ada84fd1acb5&amp;follow=1'>[lcd4linux @ 2000-04-05 05:58:36 by reinelt]</a></td><td>reinelt</td><td>4</td><td><span class='deletions'>-17</span>/<span class='insertions'>+65</span></td></tr>