Enough compatibility work to make figlet build and run!

I ran out of steam writing library routines and imported two BSD-licensed libc routines: sscanf() and getopt(). I will most likely rewrite them sooner or later. For now I just wanted to see figlet running.
2025-05-31 22:28:11 +00:00 · 2018-10-31 17:50:43 +01:00 · 2018-10-31 17:50:43 +01:00 · 819ce91395
commit 819ce91395
parent 69c7a59e6f
22 changed files with 714 additions and 36 deletions
--- a/LibC/getopt.cpp
+++ b/LibC/getopt.cpp
@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 1987, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <getopt.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+int	opterr = 1; /* if error message should be printed */
+int optind = 1; /* index into parent argv vector */
+int optopt;     /* character checked for validity */
+int optreset;   /* reset getopt */
+char *optarg;   /* argument associated with option */
+
+#define	BADCH  (int)'?'
+#define	BADARG (int)':'
+#define	EMSG   ""
+
+int getopt(int nargc, char* const nargv[], const char* ostr)
+{
+    static const char* place = EMSG; /* option letter processing */
+    char *oli; /* option letter list index */
+
+    ASSERT(nargv != NULL);
+    ASSERT(ostr != NULL);
+
+    if (optreset || !*place) { /* update scanning pointer */
+        optreset = 0;
+        if (optind >= nargc || *(place = nargv[optind]) != '-') {
+            place = EMSG;
+            return (-1);
+        }
+        if (place[1] && *++place == '-' /* found "--" */
+            && place[1] == '\0') {
+            ++optind;
+            place = EMSG;
+            return -1;
+        }
+    }					/* option letter okay? */
+    if ((optopt = (int)*place++) == (int)':' || !(oli = strchr(ostr, optopt))) {
+        /*
+         * if the user didn't specify '-' as an option,
+         * assume it means -1.
+         */
+        if (optopt == (int)'-')
+            return -1;
+        if (!*place)
+            ++optind;
+        if (opterr && *ostr != ':')
+            fprintf(stderr, "unknown option -- %c\n", optopt);
+        return BADCH;
+    }
+    if (*++oli != ':') { /* don't need argument */
+        optarg = NULL;
+        if (!*place)
+            ++optind;
+    }
+    else { /* need an argument */
+        if (*place) /* no white space */
+            optarg = (char*)place;
+        else if (nargc <= ++optind) { /* no arg */
+            place = EMSG;
+            if (*ostr == ':')
+                return BADARG;
+            if (opterr)
+                fprintf(stderr, "option requires an argument -- %c\n", optopt);
+            return BADCH;
+        }
+        else /* white space */
+            optarg = nargv[optind];
+        place = EMSG;
+        ++optind;
+    }
+    return optopt; /* dump back option letter */
+}