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-rw-r--r--xorg-server/hw/dmx/input/dmxarg.c175
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
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+++ b/xorg-server/hw/dmx/input/dmxarg.c
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+/*
+ * 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