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Make deterministic UUID code friendly to non-C99 compilers; update change log

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This commit is contained in:
Jason Perkins 2012-12-19 09:29:52 -05:00
parent 4c7fc6881b
commit 7abfc991ae
2 changed files with 28 additions and 11 deletions
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4
CHANGES.txt
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@ -1,5 +1,5 @@
--------
4.5 (in progress)
5.0 (in progress)
--------
* Completely overhauled the platform support; too many changes to list
@ -26,6 +26,8 @@
* Added NoImplicitLink flag to force explicit linking from Visual Studio
* Decoupled VS2010 smaller type checks (/RTCc) from extra warnings (/W4)
* Added NoRuntimeChecks flag to disable Visual Studio default checks
* Generated Visual Studio GUIDs are now deterministic
* Added support for Visual Studio solution groups
-------

35
src/host/os_uuid.c
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@ -1,21 +1,36 @@
/**
* \file os_uuid.c
* \brief Create a new UUID.
* \author Copyright (c) 2002-2008 Jason Perkins and the Premake project
* \author Copyright (c) 2002-2012 Jason Perkins and the Premake project
*/
#include "premake.h"
#include <stdint.h>
#if PLATFORM_WINDOWS
#include <Objbase.h>
#endif
/*
* Pull off the four lowest bytes of a value and add them to my array,
* without the help of the determinately sized C99 data types that
* are not yet universally supported.
*/
static void add(unsigned char* bytes, int offset, unsigned long value)
{
int i;
for (i = 0; i < 4; ++i)
{
bytes[offset++] = value & 0xff;
value >>= 8;
}
}
int os_uuid(lua_State* L)
{
char uuid[38];
uint32_t buffer[4];
uint8_t* bytes = (uint8_t*)buffer;
unsigned char bytes[16];
/* If a name argument is supplied, build the UUID from that. For speed we
* are using a simple DBJ2 hashing function; if this isn't sufficient we
@ -23,23 +38,23 @@ int os_uuid(lua_State* L)
const char* name = luaL_optstring(L, 1, NULL);
if (name != NULL)
{
buffer[0] = do_hash(name, 0);
buffer[1] = do_hash(name, 'L');
buffer[2] = do_hash(name, 'u');
buffer[3] = do_hash(name, 'a');
add(bytes, 0, do_hash(name, 0));
add(bytes, 4, do_hash(name, 'L'));
add(bytes, 8, do_hash(name, 'u'));
add(bytes, 12, do_hash(name, 'a'));
}
/* If no name is supplied, try to build one properly */
else
{
#if PLATFORM_WINDOWS
CoCreateGuid((GUID*)buffer);
CoCreateGuid((GUID*)bytes);
#else
int result;
/* not sure how to get a UUID here, so I fake it */
FILE* rnd = fopen("/dev/urandom", "rb");
result = fread(buffer, 16, 1, rnd);
result = fread(bytes, 16, 1, rnd);
fclose(rnd);
if (!result)
{