mirror of
https://github.com/holub/mame
synced 2025-05-25 23:35:26 +03:00
b5475eb38b
Compile Lua as C++. When Lua is compiled as C, it uses setjmp/longjmp for error handling, resulting in failure to unwind intermediate stack frames. Trying to ensure no objects with non-trivial destructors are in scope when raising a Lua error is error-prone. In particular, converting an exception to a Lua error becomes convoluted, and raising a Lua error from a constructor is effectively impossible. Updated Lua to 5.4.4 - this includes a brand-new garbage collector implementation with better performance. The main thing removed is the deprecated bitlib. Updated sol2 to version 3.3.0 - this adds support for Lua 5.4 and fixes a number of issues, including not correctly handling errors when Lua is built as C++. Updated LuaFileSystem to version 1.8.0 - this adds support for symbolic links on Windows, as well as Lua 5.4 compatibility. Updated LuaSQLite3 to version 0.9.5 - this fixes issues in multi-threaded environments, as well as Lua 5.4 compatibility. Fixed double-free after attempting to construct a debugger expression from Lua with an invalid string, and exposed expression error to Lua in a better way. Added warning level print function to Lua. Fixed saving cheats with shift operators in expressions, although this code isn't actually used as there's no cheat editor.
69 lines
1.3 KiB
C
69 lines
1.3 KiB
C
/*
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** $Id: lzio.c $
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** Buffered streams
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** See Copyright Notice in lua.h
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*/
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#define lzio_c
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#define LUA_CORE
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#include "lprefix.h"
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#include <string.h>
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#include "lua.h"
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#include "llimits.h"
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#include "lmem.h"
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#include "lstate.h"
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#include "lzio.h"
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int luaZ_fill (ZIO *z) {
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size_t size;
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lua_State *L = z->L;
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const char *buff;
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lua_unlock(L);
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buff = z->reader(L, z->data, &size);
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lua_lock(L);
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if (buff == NULL || size == 0)
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return EOZ;
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z->n = size - 1; /* discount char being returned */
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z->p = buff;
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return cast_uchar(*(z->p++));
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}
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void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader, void *data) {
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z->L = L;
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z->reader = reader;
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z->data = data;
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z->n = 0;
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z->p = NULL;
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}
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/* --------------------------------------------------------------- read --- */
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size_t luaZ_read (ZIO *z, void *b, size_t n) {
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while (n) {
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size_t m;
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if (z->n == 0) { /* no bytes in buffer? */
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if (luaZ_fill(z) == EOZ) /* try to read more */
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return n; /* no more input; return number of missing bytes */
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else {
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z->n++; /* luaZ_fill consumed first byte; put it back */
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z->p--;
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}
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}
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m = (n <= z->n) ? n : z->n; /* min. between n and z->n */
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memcpy(b, z->p, m);
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z->n -= m;
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z->p += m;
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b = (char *)b + m;
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n -= m;
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}
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return 0;
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}
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