mirror of https://github.com/rusefi/lua.git
Forbid changing numerical types through compiler options
'luaconf.h' always defines options LUA_32BITS, LUA_C89_NUMBERS, LUA_INT_TYPE, and LUA_FLOAT_TYPE (using 0/1 for the first two), to avoid they being set through compiler options. (It is too easy to forget these options when compiling other software that interoperates with Lua.)
This commit is contained in:
Roberto Ierusalimschy
parent
2bfa13e520
commit
dee6433a89
85
luaconf.h
85
luaconf.h
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@ -16,13 +16,13 @@
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** ===================================================================
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** General Configuration File for Lua
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**
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** Some definitions here can be changed externally, through the
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** compiler (e.g., with '-D' options). Those are protected by
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** '#if !defined' guards. However, several other definitions should
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** be changed directly here, either because they affect the Lua
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** ABI (by making the changes here, you ensure that all software
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** connected to Lua, such as C libraries, will be compiled with the
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** same configuration); or because they are seldom changed.
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** Some definitions here can be changed externally, through the compiler
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** (e.g., with '-D' options): They are commented out or protected
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** by '#if !defined' guards. However, several other definitions
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** should be changed directly here, either because they affect the
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** Lua ABI (by making the changes here, you ensure that all software
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** connected to Lua, such as C libraries, will be compiled with the same
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** configuration); or because they are seldom changed.
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**
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** Search for "@@" to find all configurable definitions.
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** ===================================================================
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@ -81,26 +81,12 @@
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/*
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** {==================================================================
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** Configuration for Number types.
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** Configuration for Number types. These options should not be
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** set externally, because any other code connected to Lua must
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** use the same configuration.
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** ===================================================================
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*/
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/*
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@@ LUA_32BITS enables Lua with 32-bit integers and 32-bit floats.
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*/
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/* #define LUA_32BITS */
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/*
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@@ LUA_C89_NUMBERS ensures that Lua uses the largest types available for
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** C89 ('long' and 'double'); Windows always has '__int64', so it does
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** not need to use this case.
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*/
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#if defined(LUA_USE_C89) && !defined(LUA_USE_WINDOWS)
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#define LUA_C89_NUMBERS
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#endif
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/*
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@@ LUA_INT_TYPE defines the type for Lua integers.
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@@ LUA_FLOAT_TYPE defines the type for Lua floats.
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@ -121,7 +107,31 @@
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#define LUA_FLOAT_DOUBLE 2
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#define LUA_FLOAT_LONGDOUBLE 3
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#if defined(LUA_32BITS) /* { */
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/* Default configuration ('long long' and 'double', for 64-bit Lua) */
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#define LUA_INT_DEFAULT LUA_INT_LONGLONG
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#define LUA_FLOAT_DEFAULT LUA_FLOAT_DOUBLE
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/*
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@@ LUA_32BITS enables Lua with 32-bit integers and 32-bit floats.
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*/
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#define LUA_32BITS 0
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/*
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@@ LUA_C89_NUMBERS ensures that Lua uses the largest types available for
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** C89 ('long' and 'double'); Windows always has '__int64', so it does
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** not need to use this case.
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*/
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#if defined(LUA_USE_C89) && !defined(LUA_USE_WINDOWS)
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#define LUA_C89_NUMBERS 1
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#else
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#define LUA_C89_NUMBERS 0
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#endif
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#if LUA_32BITS /* { */
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/*
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** 32-bit integers and 'float'
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*/
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@ -132,27 +142,22 @@
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#endif
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#define LUA_FLOAT_TYPE LUA_FLOAT_FLOAT
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#elif defined(LUA_C89_NUMBERS) /* }{ */
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#elif LUA_C89_NUMBERS /* }{ */
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/*
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** largest types available for C89 ('long' and 'double')
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*/
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#define LUA_INT_TYPE LUA_INT_LONG
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#define LUA_FLOAT_TYPE LUA_FLOAT_DOUBLE
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#else /* }{ */
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/* use defaults */
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#define LUA_INT_TYPE LUA_INT_DEFAULT
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#define LUA_FLOAT_TYPE LUA_FLOAT_DEFAULT
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#endif /* } */
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/*
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** default configuration for 64-bit Lua ('long long' and 'double')
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*/
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#if !defined(LUA_INT_TYPE)
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#define LUA_INT_TYPE LUA_INT_LONGLONG
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#endif
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#if !defined(LUA_FLOAT_TYPE)
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#define LUA_FLOAT_TYPE LUA_FLOAT_DOUBLE
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#endif
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/* }================================================================== */
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@ -373,14 +378,13 @@
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/*
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** {==================================================================
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** Configuration for Numbers.
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** Configuration for Numbers (low-level part).
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** Change these definitions if no predefined LUA_FLOAT_* / LUA_INT_*
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** satisfy your needs.
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** ===================================================================
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*/
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/*
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@@ LUA_NUMBER is the floating-point type used by Lua.
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@@ LUAI_UACNUMBER is the result of a 'default argument promotion'
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@@ over a floating number.
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@@ l_floatatt(x) corrects float attribute 'x' to the proper float type
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@ -473,10 +477,7 @@
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/*
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@@ LUA_INTEGER is the integer type used by Lua.
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**
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@@ LUA_UNSIGNED is the unsigned version of LUA_INTEGER.
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**
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@@ LUAI_UACINT is the result of a 'default argument promotion'
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@@ over a LUA_INTEGER.
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@@ LUA_INTEGER_FRMLEN is the length modifier for reading/writing integers.
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