[lcd4linux @ 2006-02-19 15:42:18 by reinelt]

file plugin from Chris Maj

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@640 3ae390bd-cb1e-0410-b409-cd5a39f66f1f

1 files changed, 113 insertions, 0 deletions

diff --git a/plugin_file.c b/plugin_file.c
new file mode 100644
index 0000000..24ac815
--- /dev/null
+++ b/plugin_file.c
@@ -0,0 +1,113 @@
+/* $Id: plugin_file.c,v 1.1 2006/02/19 15:42:19 reinelt Exp $
+ *
+ * plugin to perform simple file operations
+ *
+ * Copyright (C) 2006 Chris Maj <cmaj@freedomcorpse.com>
+ * Copyright (C) 2006 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.
+ *
+ *
+ * $Log: plugin_file.c,v $
+ * Revision 1.1  2006/02/19 15:42:19  reinelt
+ * file plugin from Chris Maj
+ *
+ */
+
+/* 
+ * exported functions:
+ *
+ * int plugin_init_file (void)
+ *  adds various functions
+ *
+ */
+
+
+/* define the include files you need */
+#include "config.h"
+
+#include <stdio.h>
+#include <string.h>
+
+/* these should always be included */
+#include "debug.h"
+#include "plugin.h"
+
+#ifdef WITH_DMALLOC
+#include <dmalloc.h>
+#endif
+
+
+/* function 'readline' */
+/* takes two arguments, file name and line number */
+/* returns text of that line */
+
+static void my_readline(RESULT * result, RESULT * arg1, RESULT * arg2)
+{
+    char value[80], val2[80];
+    char *pos;
+    FILE *fp;
+    int reqline, i, size;
+
+    reqline = R2N(arg2);
+    fp = fopen(R2S(arg1), "r");
+    if (!fp) {
+	error("readline couldn't open file '%s'", R2S(arg1));
+    } else {
+	i = 0;
+	while (!feof(fp) && i < reqline) {
+	    fgets(val2, sizeof(val2), fp);
+	    size = strcspn(val2, "\n");
+	    strncpy(value, val2, size);
+	    value[size] = '\0';
+	    pos = strchr(val2, '\n');
+	    /* more than 80 chars, chew up rest of line */
+	    while (!pos) {
+		fgets(val2, sizeof(val2), fp);
+		pos = strchr(val2, '\n');
+	    }
+	    i++;
+	}
+	fclose(fp);
+	if (i < reqline) {
+	    error("readline requested line %d but file only had %d lines", reqline, i);
+	    value[0] = '\0';
+	}
+    }
+
+    /* store result */
+    SetResult(&result, R_STRING, &value);
+}
+
+/* plugin initialization */
+/* MUST NOT be declared 'static'! */
+int plugin_init_file(void)
+{
+
+    /* register all our cool functions */
+    /* the second parameter is the number of arguments */
+    /* -1 stands for variable argument list */
+    AddFunction("file::readline", 2, my_readline);
+
+    return 0;
+}
+
+void plugin_exit_file(void)
+{
+    /* free any allocated memory */
+    /* close filedescriptors */
+}