Initial checkin: beta 0.43

[originally from svn r11]

misc.c

@@ -0,0 +1,67 @@
+#include <windows.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "putty.h"
+
+/* My own versions of malloc, realloc and free. Because I want malloc and
+ * realloc to bomb out and exit the program if they run out of memory,
+ * realloc to reliably call malloc if passed a NULL pointer, and free
+ * to reliably do nothing if passed a NULL pointer. Of course we can also
+ * put trace printouts in, if we need to. */
+
+#ifdef MALLOC_LOG
+static FILE *fp = NULL;
+
+void mlog(char *file, int line) {
+    if (!fp)
+	fp = fopen("putty_mem.log", "w");
+    if (fp)
+	fprintf (fp, "%s:%d: ", file, line);
+}
+#endif
+
+void *safemalloc(size_t size) {
+    void *p = malloc (size);
+    if (!p) {
+	MessageBox(NULL, "Out of memory!", "PuTTY Fatal Error",
+		   MB_SYSTEMMODAL | MB_ICONERROR | MB_OK);
+	exit(1);
+    }
+#ifdef MALLOC_LOG
+    if (fp)
+	fprintf(fp, "malloc(%d) returns %p\n", size, p);
+#endif
+    return p;
+}
+
+void *saferealloc(void *ptr, size_t size) {
+    void *p;
+    if (!ptr)
+	p = malloc (size);
+    else
+	p = realloc (ptr, size);
+    if (!p) {
+	MessageBox(NULL, "Out of memory!", "PuTTY Fatal Error",
+		   MB_SYSTEMMODAL | MB_ICONERROR | MB_OK);
+	exit(1);
+    }
+#ifdef MALLOC_LOG
+    if (fp)
+	fprintf(fp, "realloc(%p,%d) returns %p\n", ptr, size, p);
+#endif
+    return p;
+}
+
+void safefree(void *ptr) {
+    if (ptr) {
+#ifdef MALLOC_LOG
+	if (fp)
+	    fprintf(fp, "free(%p)\n", ptr);
+#endif
+	free (ptr);
+    }
+#ifdef MALLOC_LOG
+    else if (fp)
+	fprintf(fp, "freeing null pointer - no action taken\n");
+#endif
+}