dct/fft-test: use a replacement getopt() if the system has none present.

This allows compiling and running these tests on systems lacking a built-
in version of getopt(), such as MSVC.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

1 files changed, 84 insertions, 0 deletions

diff --git a/compat/getopt.c b/compat/getopt.c
new file mode 100644
index 0000000000..3a873b27ee
--- /dev/null
+++ b/compat/getopt.c
@@ -0,0 +1,84 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/*
+ * This file was copied from the following newsgroup posting:
+ *
+ * Newsgroups: mod.std.unix
+ * Subject: public domain AT&T getopt source
+ * Date: 3 Nov 85 19:34:15 GMT
+ *
+ * Here's something you've all been waiting for:  the AT&T public domain
+ * source for getopt(3).  It is the code which was given out at the 1985
+ * UNIFORUM conference in Dallas.  I obtained it by electronic mail
+ * directly from AT&T.  The people there assure me that it is indeed
+ * in the public domain.
+ */
+
+#define EOF (-1)
+
+static int opterr = 1;
+static int optind = 1;
+static int optopt;
+static char *optarg;
+
+#undef fprintf
+
+static int getopt(int argc, char *argv[], char *opts)
+{
+    static int sp = 1;
+    int c;
+    char *cp;
+
+    if (sp == 1)
+        if (optind >= argc ||
+            argv[optind][0] != '-' || argv[optind][1] == '\0')
+            return EOF;
+        else if (!strcmp(argv[optind], "--")) {
+            optind++;
+            return EOF;
+        }
+    optopt = c = argv[optind][sp];
+    if (c == ':' || (cp = strchr(opts, c)) == NULL) {
+        fprintf(stderr, ": illegal option -- %c\n", c);
+        if (argv[optind][++sp] == '\0') {
+            optind++;
+            sp = 1;
+        }
+        return '?';
+    }
+    if (*++cp == ':') {
+        if (argv[optind][sp+1] != '\0')
+            optarg = &argv[optind++][sp+1];
+        else if(++optind >= argc) {
+            fprintf(stderr, ": option requires an argument -- %c\n", c);
+            sp = 1;
+            return '?';
+        } else
+            optarg = argv[optind++];
+        sp = 1;
+    } else {
+        if (argv[optind][++sp] == '\0') {
+            sp = 1;
+            optind++;
+        }
+        optarg = NULL;
+    }
+
+    return c;
+}