Added parser module

src/parser.c

@@ -0,0 +1,96 @@
+/*
+ * parser.c
+ *
+ * Copyright (C) 2012 James Booth <boothj5@gmail.com>
+ *
+ * This file is part of Profanity.
+ *
+ * Profanity 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.
+ *
+ * Profanity 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 Profanity.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <glib.h>
+
+gchar **
+parse_args(const char * const inp, int min, int max, int *num)
+{
+    if (inp == NULL) {
+        *num = 0;
+        return NULL;
+    }
+
+    // copy and strip input of leading/trailing whitepsace
+    char *copy = strdup(inp);
+    g_strstrip(copy);
+
+    int inp_size = strlen(copy);
+    gboolean in_token = FALSE;
+    char *token_start = &copy[0];
+    int token_size = 0;
+    GSList *tokens = NULL;
+
+    // add tokens to GSList
+    int i;
+    for (i = 0; i <= inp_size; i++) {
+        if (!in_token) {
+            if (copy[i] == ' ') {
+                continue;
+            } else {
+                in_token = TRUE;
+                token_start = &copy[i];
+                token_size++;
+            }
+        } else {
+            if (copy[i] == ' ' || copy[i] == '\0') {
+                tokens = g_slist_append(tokens, g_strndup(token_start, 
+                    token_size));
+                token_size = 0;
+                in_token = FALSE;
+            } else {
+                token_size++;
+            }
+        }
+    }
+    
+    *num = g_slist_length(tokens) - 1;
+
+    // if num args not valid return NULL
+    if ((*num < min) || (*num > max)) {
+        g_slist_free_full(tokens, free);
+        free(copy);
+        *num = 0;
+        return NULL;
+
+    // otherwise return args array
+    } else {
+        gchar **args = malloc((*num + 1) * sizeof(*args));
+        GSList *token = tokens;
+        token = g_slist_next(token);
+        int arg_count = 0;
+
+        while (token != NULL) {
+            args[arg_count++] = strdup(token->data);
+            token = g_slist_next(token);
+        }
+
+        args[arg_count] = NULL;
+        g_slist_free_full(tokens, free);
+        free(copy);
+
+        return args;
+    }
+}