1 files changed, 175 insertions, 0 deletions
diff --git a/xorg-server/hw/dmx/input/dmxarg.c b/xorg-server/hw/dmx/input/dmxarg.c
new file mode 100644
index 000000000..49a1da9af
--- /dev/null
+++ b/xorg-server/hw/dmx/input/dmxarg.c
@@ -0,0 +1,175 @@
+/*
+ * Copyright 2002-2003 Red Hat Inc., Durham, North Carolina.
+ *
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation on the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NON-INFRINGEMENT.  IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/*
+ * Authors:
+ *   Rickard E. (Rik) Faith <faith@redhat.com>
+ *
+ */
+
+/** \file
+ * Generic comma-delimited argument processing. */
+
+#ifdef HAVE_DMX_CONFIG_H
+#include <dmx-config.h>
+#endif
+
+#define DMX_ARG_TEST 0
+
+#include "dmx.h"
+#include "dmxarg.h"
+#include <stdio.h>
+#include <string.h>
+
+#if DMX_ARG_TEST
+#include <stdlib.h>
+#endif
+
+/** Stores the parsed argument list. */
+struct _dmxArg {
+    int        argc;   /**< Number of arguments in argv */
+    int        argm;   /**< Maximum number of arguments store-able in argv */
+    const char **argv; /**< Arguments */
+};
+
+/** Create an (externally opaque) \a dmxArg object. */
+dmxArg dmxArgCreate(void)
+{
+    dmxArg a   = malloc(sizeof(*a));
+    a->argc    = 0;
+    a->argm    = 2;
+    a->argv    = malloc(a->argm * sizeof(*a->argv));
+    a->argv[0] = NULL;
+    return a;
+}
+
+/** Free the specified \a dmxArg object. */
+void dmxArgFree(dmxArg a)
+{
+    int i;
+
+    for (i = 0; i < a->argc; i++) free((char *)a->argv[i]);
+    free(a->argv);
+    free(a);
+}
+
+/** Add the \a string as the next argument in the \a dmxArg object. */
+void dmxArgAdd(dmxArg a, const char *string)
+{
+    if (a->argm <= a->argc + 2)
+        a->argv = realloc(a->argv, sizeof(*a->argv) * (a->argm *= 2));
+    a->argv[a->argc++] = strdup(string);
+    a->argv[a->argc]   = NULL;
+}
+
+/** Return the argument number \a item in the \a dmxArg object.
+ * Arguments are 0 based.  NULL will be returned for values less than 0
+ * or equal to or greater than the number of arguments in the object. */
+const char *dmxArgV(dmxArg a, int item)
+{
+    if (item < 0 || item >= a->argc) return NULL;
+    return a->argv[item];
+}
+
+/** Return the number of arguments in the \a dmxArg object. */
+int dmxArgC(dmxArg a)
+{
+    return a->argc;
+}
+
+/** Parse a string into arguments delimited by commas.  Return a new \a
+ * dmxArg object containing the arguments. */
+dmxArg dmxArgParse(const char *string)
+{
+    char   *tmp;
+    char   *start, *pt;
+    dmxArg a = dmxArgCreate();
+    int    done;
+    int    len;
+
+    if (!string) return a;
+
+    len = strlen(string) + 2;
+    tmp = malloc(len);
+    strncpy(tmp, string, len);
+
+    for (start = pt = tmp, done = 0; !done && *pt; start = ++pt) {
+        for (;*pt && *pt != ','; pt++);
+        if (!*pt) done = 1;
+        *pt = '\0';
+        dmxArgAdd(a, start);
+    }
+    if (!done) dmxArgAdd(a, ""); /* Final comma */
+    
+    free(tmp);
+    return a;
+}
+
+#if DMX_ARG_TEST
+static void dmxArgPrint(dmxArg a)
+{
+    int i;
+
+    printf("   argc = %d\n", dmxArgC(a));
+    for (i = 0; i < dmxArgC(a); i++)
+        printf("   argv[%d] = \"%s\"\n", i, dmxArgV(a, i));
+}
+
+static void dmxArgTest(const char *string)
+{
+    dmxArg a;
+
+    if (!string)
+        printf("Testing NULL\n");
+    else if (!strlen(string))
+        printf("Testing (empty)\n");
+    else
+        printf("Testing \"%s\"\n", string);
+
+    a = dmxArgParse(string);
+    dmxArgPrint(a);
+    dmxArgFree(a);
+}
+
+int main(void)
+{
+    dmxArgTest(NULL);
+    dmxArgTest("");
+    dmxArgTest(",");
+
+    dmxArgTest("a");
+    dmxArgTest("a,");
+    dmxArgTest(",a");
+
+    dmxArgTest("a,b");
+    dmxArgTest("a,b,");
+    dmxArgTest("a,b,,");
+    dmxArgTest("a,b,,c");
+
+    return 0;
+}
+#endif