From 3bb446ba6e890bc3f60a34318a5a0fe860e53cbb Mon Sep 17 00:00:00 2001 From: Michal Krol Date: Fri, 26 Jun 2009 10:59:25 +0200 Subject: glsl: Add expression interpreter. --- src/glsl/pp/SConscript | 1 + src/glsl/pp/sl_pp_expression.c | 407 +++++++++++++++++++++++++++++++++++++++++ src/glsl/pp/sl_pp_expression.h | 40 ++++ 3 files changed, 448 insertions(+) create mode 100644 src/glsl/pp/sl_pp_expression.c create mode 100644 src/glsl/pp/sl_pp_expression.h diff --git a/src/glsl/pp/SConscript b/src/glsl/pp/SConscript index 1fde3dfccf3..623d2362ce0 100644 --- a/src/glsl/pp/SConscript +++ b/src/glsl/pp/SConscript @@ -10,6 +10,7 @@ glsl = env.StaticLibrary( source = [ 'sl_pp_context.c', 'sl_pp_define.c', + 'sl_pp_expression.c', 'sl_pp_macro.c', 'sl_pp_process.c', 'sl_pp_purify.c', diff --git a/src/glsl/pp/sl_pp_expression.c b/src/glsl/pp/sl_pp_expression.c new file mode 100644 index 00000000000..a692430abbf --- /dev/null +++ b/src/glsl/pp/sl_pp_expression.c @@ -0,0 +1,407 @@ +/************************************************************************** + * + * Copyright 2009 VMware, Inc. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + +#include +#include "sl_pp_expression.h" + + +struct parse_context { + struct sl_pp_context *context; + const struct sl_pp_token_info *input; +}; + +static int +_parse_or(struct parse_context *ctx, + int *result); + +static int +_parse_primary(struct parse_context *ctx, + int *result) +{ + if (ctx->input->token == SL_PP_NUMBER) { + *result = atoi(sl_pp_context_cstr(ctx->context, ctx->input->data.number)); + ctx->input++; + } else { + if (ctx->input->token != SL_PP_LPAREN) { + return -1; + } + ctx->input++; + if (_parse_or(ctx, result)) { + return -1; + } + if (ctx->input->token != SL_PP_RPAREN) { + return -1; + } + ctx->input++; + } + return 0; +} + +static int +_parse_unary(struct parse_context *ctx, + int *result) +{ + if (!_parse_primary(ctx, result)) { + return 0; + } + + switch (ctx->input->token) { + case SL_PP_PLUS: + ctx->input++; + if (_parse_unary(ctx, result)) { + return -1; + } + *result = +*result; + break; + + case SL_PP_MINUS: + ctx->input++; + if (_parse_unary(ctx, result)) { + return -1; + } + *result = -*result; + break; + + case SL_PP_NOT: + ctx->input++; + if (_parse_unary(ctx, result)) { + return -1; + } + *result = !*result; + break; + + case SL_PP_BITNOT: + ctx->input++; + if (_parse_unary(ctx, result)) { + return -1; + } + *result = ~*result; + break; + + default: + return -1; + } + + return 0; +} + +static int +_parse_multiplicative(struct parse_context *ctx, + int *result) +{ + if (_parse_unary(ctx, result)) { + return -1; + } + for (;;) { + int right; + + switch (ctx->input->token) { + case SL_PP_STAR: + ctx->input++; + if (_parse_unary(ctx, &right)) { + return -1; + } + *result = *result * right; + break; + + case SL_PP_SLASH: + ctx->input++; + if (_parse_unary(ctx, &right)) { + return -1; + } + *result = *result / right; + break; + + case SL_PP_MODULO: + ctx->input++; + if (_parse_unary(ctx, &right)) { + return -1; + } + *result = *result % right; + break; + + default: + return 0; + } + } +} + +static int +_parse_additive(struct parse_context *ctx, + int *result) +{ + if (_parse_multiplicative(ctx, result)) { + return -1; + } + for (;;) { + int right; + + switch (ctx->input->token) { + case SL_PP_PLUS: + ctx->input++; + if (_parse_multiplicative(ctx, &right)) { + return -1; + } + *result = *result + right; + break; + + case SL_PP_MINUS: + ctx->input++; + if (_parse_multiplicative(ctx, &right)) { + return -1; + } + *result = *result - right; + break; + + default: + return 0; + } + } +} + +static int +_parse_shift(struct parse_context *ctx, + int *result) +{ + if (_parse_additive(ctx, result)) { + return -1; + } + for (;;) { + int right; + + switch (ctx->input->token) { + case SL_PP_LSHIFT: + ctx->input++; + if (_parse_additive(ctx, &right)) { + return -1; + } + *result = *result << right; + break; + + case SL_PP_RSHIFT: + ctx->input++; + if (_parse_additive(ctx, &right)) { + return -1; + } + *result = *result >> right; + break; + + default: + return 0; + } + } +} + +static int +_parse_relational(struct parse_context *ctx, + int *result) +{ + if (_parse_shift(ctx, result)) { + return -1; + } + for (;;) { + int right; + + switch (ctx->input->token) { + case SL_PP_LESSEQUAL: + ctx->input++; + if (_parse_shift(ctx, &right)) { + return -1; + } + *result = *result <= right; + break; + + case SL_PP_GREATEREQUAL: + ctx->input++; + if (_parse_shift(ctx, &right)) { + return -1; + } + *result = *result >= right; + break; + + case SL_PP_LESS: + ctx->input++; + if (_parse_shift(ctx, &right)) { + return -1; + } + *result = *result < right; + break; + + case SL_PP_GREATER: + ctx->input++; + if (_parse_shift(ctx, &right)) { + return -1; + } + *result = *result > right; + break; + + default: + return 0; + } + } +} + +static int +_parse_equality(struct parse_context *ctx, + int *result) +{ + if (_parse_relational(ctx, result)) { + return -1; + } + for (;;) { + int right; + + switch (ctx->input->token) { + case SL_PP_EQUAL: + ctx->input++; + if (_parse_relational(ctx, &right)) { + return -1; + } + *result = *result == right; + break; + + case SL_PP_NOTEQUAL: + ctx->input++; + if (_parse_relational(ctx, &right)) { + return -1; + } + *result = *result != right; + break; + + default: + return 0; + } + } +} + +static int +_parse_bitand(struct parse_context *ctx, + int *result) +{ + if (_parse_equality(ctx, result)) { + return -1; + } + while (ctx->input->token == SL_PP_BITAND) { + int right; + + ctx->input++; + if (_parse_equality(ctx, &right)) { + return -1; + } + *result = *result & right; + } + return 0; +} + +static int +_parse_xor(struct parse_context *ctx, + int *result) +{ + if (_parse_bitand(ctx, result)) { + return -1; + } + while (ctx->input->token == SL_PP_XOR) { + int right; + + ctx->input++; + if (_parse_bitand(ctx, &right)) { + return -1; + } + *result = *result ^ right; + } + return 0; +} + +static int +_parse_bitor(struct parse_context *ctx, + int *result) +{ + if (_parse_xor(ctx, result)) { + return -1; + } + while (ctx->input->token == SL_PP_BITOR) { + int right; + + ctx->input++; + if (_parse_xor(ctx, &right)) { + return -1; + } + *result = *result | right; + } + return 0; +} + +static int +_parse_and(struct parse_context *ctx, + int *result) +{ + if (_parse_bitor(ctx, result)) { + return -1; + } + while (ctx->input->token == SL_PP_AND) { + int right; + + ctx->input++; + if (_parse_bitor(ctx, &right)) { + return -1; + } + *result = *result && right; + } + return 0; +} + +static int +_parse_or(struct parse_context *ctx, + int *result) +{ + if (_parse_and(ctx, result)) { + return -1; + } + while (ctx->input->token == SL_PP_OR) { + int right; + + ctx->input++; + if (_parse_and(ctx, &right)) { + return -1; + } + *result = *result || right; + } + return 0; +} + +int +sl_pp_execute_expression(struct sl_pp_context *context, + const struct sl_pp_token_info *input, + int *result) +{ + struct parse_context ctx; + + ctx.context = context; + ctx.input = input; + + return _parse_or(&ctx, result); +} diff --git a/src/glsl/pp/sl_pp_expression.h b/src/glsl/pp/sl_pp_expression.h new file mode 100644 index 00000000000..377d5b4cbd9 --- /dev/null +++ b/src/glsl/pp/sl_pp_expression.h @@ -0,0 +1,40 @@ +/************************************************************************** + * + * Copyright 2009 VMware, Inc. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + +#ifndef SL_PP_EXPRESSION_H +#define SL_PP_EXPRESSION_H + +#include "sl_pp_context.h" +#include "sl_pp_token.h" + + +int +sl_pp_execute_expression(struct sl_pp_context *context, + const struct sl_pp_token_info *input, + int *result); + +#endif /* SL_PP_EXPRESSION_H */ -- cgit v1.2.3