Mercurial > hg > openttd
changeset 5600:37c5d98c3fa6 draft
(svn r8054) -Codechange: Use a template function instead of a macro for evaluating NewGRF var adjusts
| author | peter1138 <peter1138@openttd.org> |
|---|---|
| date | Thu, 11 Jan 2007 10:58:53 +0000 |
| parents | 5e5bc5e7c067 |
| children | ca6b459bf488 |
| files | src/newgrf_spritegroup.cpp |
| diffstat | 1 files changed, 39 insertions(+), 44 deletions(-) [+] |
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line diff
--- a/src/newgrf_spritegroup.cpp +++ b/src/newgrf_spritegroup.cpp @@ -92,50 +92,45 @@ } -/* Evaluate an adjustment for a variable of the given size. This is a bit of - * an unwieldy macro, but it saves triplicating the code. */ -#define BUILD_EVAL_ADJUST(size, usize) \ -static inline usize EvalAdjust_ ## size(const DeterministicSpriteGroupAdjust *adjust, usize last_value, int32 value) \ -{ \ - value >>= adjust->shift_num; \ - value &= adjust->and_mask; \ -\ - if (adjust->type != DSGA_TYPE_NONE) value += (size)adjust->add_val; \ -\ - switch (adjust->type) { \ - case DSGA_TYPE_DIV: value /= (size)adjust->divmod_val; break; \ - case DSGA_TYPE_MOD: value %= (usize)adjust->divmod_val; break; \ - case DSGA_TYPE_NONE: break; \ - } \ -\ - /* Get our value to the correct range */ \ - value = (usize)value; \ -\ - switch (adjust->operation) { \ - case DSGA_OP_ADD: return last_value + value; \ - case DSGA_OP_SUB: return last_value - value; \ - case DSGA_OP_SMIN: return min(last_value, value); \ - case DSGA_OP_SMAX: return max(last_value, value); \ - case DSGA_OP_UMIN: return min((usize)last_value, (usize)value); \ - case DSGA_OP_UMAX: return max((usize)last_value, (usize)value); \ - case DSGA_OP_SDIV: return last_value / value; \ - case DSGA_OP_SMOD: return last_value % value; \ - case DSGA_OP_UDIV: return (usize)last_value / (usize)value; \ - case DSGA_OP_UMOD: return (usize)last_value % (usize)value; \ - case DSGA_OP_MUL: return last_value * value; \ - case DSGA_OP_AND: return last_value & value; \ - case DSGA_OP_OR: return last_value | value; \ - case DSGA_OP_XOR: return last_value ^ value; \ - default: return value; \ - } \ +/* Evaluate an adjustment for a variable of the given size. +* U is the unsigned type and S is the signed type to use. */ +template <typename U, typename S> +static U EvalAdjustT(const DeterministicSpriteGroupAdjust *adjust, U last_value, int32 value) +{ + value >>= adjust->shift_num; + value &= adjust->and_mask; + + if (adjust->type != DSGA_TYPE_NONE) value += (S)adjust->add_val; + + switch (adjust->type) { + case DSGA_TYPE_DIV: value /= (S)adjust->divmod_val; break; + case DSGA_TYPE_MOD: value %= (U)adjust->divmod_val; break; + case DSGA_TYPE_NONE: break; + } + + /* Get our value to the correct range */ + value = (U)value; + + switch (adjust->operation) { + case DSGA_OP_ADD: return last_value + value; + case DSGA_OP_SUB: return last_value - value; + case DSGA_OP_SMIN: return min(last_value, value); + case DSGA_OP_SMAX: return max(last_value, value); + case DSGA_OP_UMIN: return min((U)last_value, (U)value); + case DSGA_OP_UMAX: return max((U)last_value, (U)value); + case DSGA_OP_SDIV: return last_value / value; + case DSGA_OP_SMOD: return last_value % value; + case DSGA_OP_UDIV: return (U)last_value / (U)value; + case DSGA_OP_UMOD: return (U)last_value % (U)value; + case DSGA_OP_MUL: return last_value * value; + case DSGA_OP_AND: return last_value & value; + case DSGA_OP_OR: return last_value | value; + case DSGA_OP_XOR: return last_value ^ value; + default: return value; + } } -BUILD_EVAL_ADJUST(int8, uint8) -BUILD_EVAL_ADJUST(int16, uint16) -BUILD_EVAL_ADJUST(int32, uint32) - - static inline const SpriteGroup *ResolveVariable(const SpriteGroup *group, ResolverObject *object) { static SpriteGroup nvarzero; @@ -159,9 +154,9 @@ } switch (group->g.determ.size) { - case DSG_SIZE_BYTE: value = EvalAdjust_int8(adjust, last_value, value); break; - case DSG_SIZE_WORD: value = EvalAdjust_int16(adjust, last_value, value); break; - case DSG_SIZE_DWORD: value = EvalAdjust_int32(adjust, last_value, value); break; + case DSG_SIZE_BYTE: value = EvalAdjustT<uint8, int8>(adjust, last_value, value); break; + case DSG_SIZE_WORD: value = EvalAdjustT<uint16, int16>(adjust, last_value, value); break; + case DSG_SIZE_DWORD: value = EvalAdjustT<uint32, int32>(adjust, last_value, value); break; default: NOT_REACHED(); break; } last_value = value;