From a4d2de2120a358f0255e3a794ca73a81d27d0ec2 Mon Sep 17 00:00:00 2001
From: Dietrich Epp <depp@zdome.net>
Date: Tue, 22 Mar 2022 19:04:29 -0400
Subject: [PATCH] Create replacements for Mac OS toolbox functions

---
 src/BUILD.bazel | 12 ++++++++
 src/defs.h      | 43 +++++++++++++++++++++++++++
 src/toolbox.c   | 79 +++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 134 insertions(+)
 create mode 100644 src/defs.h
 create mode 100644 src/toolbox.c

diff --git a/src/BUILD.bazel b/src/BUILD.bazel
index 4261ca4..ead3393 100644
--- a/src/BUILD.bazel
+++ b/src/BUILD.bazel
@@ -1,3 +1,6 @@
+load("@rules_cc//cc:defs.bzl", "cc_library")
+load("//bazel:copts.bzl", "COPTS")
+
 genrule(
     name = "data",
     srcs = [
@@ -24,3 +27,12 @@ genrule(
         "//gen:macscript",
     ],
 )
+
+cc_library(
+    name = "convert",
+    srcs = [
+        "defs.h",
+        "toolbox.c",
+    ],
+    copts = COPTS,
+)
diff --git a/src/defs.h b/src/defs.h
new file mode 100644
index 0000000..814d473
--- /dev/null
+++ b/src/defs.h
@@ -0,0 +1,43 @@
+#ifndef defs_h
+#define defs_h
+/* defs.h - common definitions. */
+
+#if macintosh
+
+#include <MacTypes.h>
+
+#else
+
+/* Definitions in <MacTypes.h> */
+
+/* Include <stddef.h> for NULL */
+#include <stddef.h>
+#include <stdint.h>
+
+typedef uint8_t UInt8;
+typedef int8_t SInt8;
+typedef uint16_t UInt16;
+typedef int16_t SInt16;
+typedef uint32_t UInt32;
+typedef int32_t SInt32;
+
+typedef char *Ptr;
+typedef Ptr *Handle;
+typedef long Size;
+
+typedef SInt16 OSErr;
+
+/* Definitions in <MacMemory.h> */
+
+Handle NewHandle(Size byteCount);
+void HLock(Handle h);
+void HUnlock(Handle h);
+void DisposeHandle(Handle h);
+void SetHandleSize(Handle h, Size newSize);
+OSErr MemError(void);
+
+#endif
+
+void MemClear(void *ptr, Size size);
+
+#endif
diff --git a/src/toolbox.c b/src/toolbox.c
new file mode 100644
index 0000000..4a505bb
--- /dev/null
+++ b/src/toolbox.c
@@ -0,0 +1,79 @@
+/* toolbox.c - replacement functions for Mac OS toolbox functions
+
+   This is used to run conversion tests on non-Mac OS systems to make
+   development easier. These are not intended to make it possible to port the
+   converter to non-Mac OS systems. */
+#include "defs.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static void Dief(const char *msg, ...)
+	__attribute__((noreturn, format(printf, 1, 2)));
+
+static void Dief(const char *msg, ...) {
+	va_list ap;
+	fputs("Error: ", stderr);
+	va_start(ap, msg);
+	vfprintf(stderr, msg, ap);
+	va_end(ap);
+	fputc('\n', stderr);
+	exit(1);
+}
+
+Handle NewHandle(Size byteCount) {
+	Ptr p;
+	Handle h;
+
+	if (byteCount < 0) {
+		Dief("NewHandle: byteCount = %ld", byteCount);
+	}
+	p = malloc(byteCount);
+	if (byteCount > 0 && p == NULL) {
+		Dief("NewHandle: malloc failed");
+	}
+	h = malloc(sizeof(Ptr));
+	if (h == NULL) {
+		Dief("NewHandle: malloc failed");
+	}
+	*h = p;
+	return h;
+}
+
+void HLock(Handle h) {
+	(void)h;
+}
+
+void HUnlock(Handle h) {
+	(void)h;
+}
+
+void DisposeHandle(Handle h) {
+	if (h != NULL) {
+		free(*h);
+		free(h);
+	}
+}
+
+void SetHandleSize(Handle h, Size newSize) {
+	Ptr p;
+	if (h == NULL) {
+		Dief("SetHandleSize: h = NULL");
+	}
+	p = realloc(*h, newSize);
+	if (newSize > 0 && p == NULL) {
+		Dief("SetHandleSize: realloc failed");
+	}
+	*h = p;
+}
+
+OSErr MemError(void) {
+	/* Memory allocation failures abort the program. */
+	return 0;
+}
+
+void MemClear(void *ptr, Size size) {
+	memset(ptr, 0, size);
+}