--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/decoders/libmpg123/stringbuf.c	Fri Jan 30 02:44:47 2009 -0500
@@ -0,0 +1,131 @@
+/*
+	stringbuf: mimicking a bit of C++ to more safely handle strings
+
+	copyright 2006-8 by the mpg123 project - free software under the terms of the LGPL 2.1
+	see COPYING and AUTHORS files in distribution or http://mpg123.org
+	initially written by Thomas Orgis
+*/
+
+#include "mpg123lib_intern.h"
+#include "config.h"
+#include "mpg123.h"
+#include "compat.h"
+#include <string.h>
+#include "debug.h"
+
+void attribute_align_arg mpg123_init_string(mpg123_string* sb)
+{
+	sb->p = NULL;
+	sb->size = 0;
+	sb->fill = 0;
+}
+
+void attribute_align_arg mpg123_free_string(mpg123_string* sb)
+{
+	if(sb->p != NULL) free(sb->p);
+	mpg123_init_string(sb);
+}
+
+int attribute_align_arg mpg123_grow_string(mpg123_string* sb, size_t new)
+{
+	if(sb->size < new) return mpg123_resize_string(sb, new);
+	else return 1;
+}
+
+int attribute_align_arg mpg123_resize_string(mpg123_string* sb, size_t new)
+{
+	debug3("resizing string pointer %p from %lu to %lu", (void*) sb->p, (unsigned long)sb->size, (unsigned long)new);
+	if(new == 0)
+	{
+		if(sb->size && sb->p != NULL) free(sb->p);
+		mpg123_init_string(sb);
+		return 1;
+	}
+	if(sb->size != new)
+	{
+		char* t;
+		debug("really!");
+		t = (char*) safe_realloc(sb->p, new*sizeof(char));
+		debug1("safe_realloc returned %p", (void*) t); 
+		if(t != NULL)
+		{
+			sb->p = t;
+			sb->size = new;
+			return 1;
+		}
+		else return 0;
+	}
+	else return 1; /* success */
+}
+
+int attribute_align_arg mpg123_copy_string(mpg123_string* from, mpg123_string* to)
+{
+	size_t fill;
+	char  *text;
+	if(to == NULL) return -1;
+
+	debug2("called copy_string with %p -> %p", (void*)from, (void*)to);
+	if(from == NULL)
+	{
+		fill = 0;
+		text = NULL;
+	}
+	else
+	{
+		fill = from->fill;
+		text = from->p;
+	}
+
+	if(mpg123_resize_string(to, fill))
+	{
+		memcpy(to->p, text, fill);
+		to->fill = fill;
+		return 1;
+	}
+	else return 0;
+}
+
+int attribute_align_arg mpg123_add_string(mpg123_string* sb, const char* stuff)
+{
+	debug1("adding %s", stuff);
+	return mpg123_add_substring(sb, stuff, 0, strlen(stuff));
+}
+
+int attribute_align_arg mpg123_add_substring(mpg123_string *sb, const char *stuff, size_t from, size_t count)
+{
+	debug("adding a substring");
+	if(sb->fill) /* includes zero byte... */
+	{
+		if( (SIZE_MAX - sb->fill >= count) /* Avoid overflow. */
+		    && (sb->size >= sb->fill+count || mpg123_grow_string(sb, sb->fill+count)) )
+		{
+			memcpy(sb->p+sb->fill-1, stuff+from, count);
+			sb->fill += count;
+			sb->p[sb->fill-1] = 0; /* Terminate! */
+		}
+		else return 0;
+	}
+	else
+	{
+		if( count < SIZE_MAX && mpg123_grow_string(sb, count+1) )
+		{
+			memcpy(sb->p, stuff+from, count);
+			sb->fill = count+1;
+			sb->p[sb->fill-1] = 0; /* Terminate! */
+		}
+		else return 0;
+	}
+	return 1;
+}
+
+int attribute_align_arg mpg123_set_substring(mpg123_string* sb, const char* stuff, size_t from, size_t count)
+{
+	sb->fill = 0;
+	return mpg123_add_substring(sb, stuff, from, count);
+}
+
+int attribute_align_arg mpg123_set_string(mpg123_string* sb, const char* stuff)
+{
+	sb->fill = 0;
+	return mpg123_add_string(sb, stuff);
+}