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/*
* HLSL preprocessor
*
* Copyright 2020 Zebediah Figura for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
%{
#include "preproc.tab.h"
#define YYSTYPE PREPROC_YYSTYPE
#define YYLTYPE PREPROC_YYLTYPE
#define YY_DECL static int preproc_lexer_lex(YYSTYPE *yylval_param, YYLTYPE *yylloc_param, yyscan_t yyscanner)
%}
%option 8bit
%option bison-bridge
%option bison-locations
%option extra-type="struct preproc_ctx *"
%option never-interactive
%option noinput
%option nounput
%option noyy_top_state
%option noyywrap
%option prefix="preproc_yy"
%option reentrant
%option stack
/* Because these can both be terminated by EOF, we need states for them. */
%s C_COMMENT
%s CXX_COMMENT
WS [ \t]
IDENTIFIER [A-Za-z_][A-Za-z0-9_]*
%%
<INITIAL>"//" {yy_push_state(CXX_COMMENT, yyscanner);}
<INITIAL>"/*" {yy_push_state(C_COMMENT, yyscanner);}
<CXX_COMMENT>\\\r?\n {}
<CXX_COMMENT>\n {
yy_pop_state(yyscanner);
return T_TEXT;
}
<C_COMMENT>"*/" {yy_pop_state(yyscanner);}
<C_COMMENT,CXX_COMMENT><<EOF>> {yy_pop_state(yyscanner);}
<C_COMMENT,CXX_COMMENT>. {}
<INITIAL>{IDENTIFIER} {return T_TEXT;}
<INITIAL>[0-9]*\.[0-9]+([eE][+-]?[0-9]+)?[hHfF]? {return T_TEXT;}
<INITIAL>[0-9]+\.([eE][+-]?[0-9]+)?[hHfF]? {return T_TEXT;}
<INITIAL>[0-9]+([eE][+-]?[0-9]+)?[hHfF] {return T_TEXT;}
<INITIAL>[0-9]+[eE][+-]?[0-9]+ {return T_TEXT;}
<INITIAL>0[xX][0-9a-fA-f]+[ul]{0,2} {return T_TEXT;}
<INITIAL>0[0-7]*[ul]{0,2} {return T_TEXT;}
<INITIAL>[1-9][0-9]*[ul]{0,2} {return T_TEXT;}
<INITIAL>"&&" {return T_TEXT;}
<INITIAL>"||" {return T_TEXT;}
<INITIAL>"++" {return T_TEXT;}
<INITIAL>"--" {return T_TEXT;}
<INITIAL>"<<"=? {return T_TEXT;}
<INITIAL>">>"=? {return T_TEXT;}
<INITIAL>[-+*/%&|^=><!]= {return T_TEXT;}
/* C strings (including escaped quotes). */
<INITIAL>\"([^"\\]|\\.)*\" {return T_TEXT;}
<INITIAL>{WS}+ {}
<INITIAL>. {return T_TEXT;}
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%%
int yylex(YYSTYPE *lval, YYLTYPE *lloc, yyscan_t scanner)
{
struct preproc_ctx *ctx = yyget_extra(scanner);
for (;;)
{
const char *text;
int token;
if (!(token = preproc_lexer_lex(lval, lloc, scanner)))
return 0;
text = yyget_text(scanner);
TRACE("Parsing token %d, string %s.\n", token, debugstr_a(text));
vkd3d_string_buffer_printf(&ctx->buffer, "%s ", text);
}
}
int preproc_lexer_parse(const struct vkd3d_shader_compile_info *compile_info,
struct vkd3d_shader_code *out, struct vkd3d_shader_message_context *message_context)
{
struct preproc_ctx ctx = {0};
YY_BUFFER_STATE top_buffer;
void *output_code;
vkd3d_string_buffer_init(&ctx.buffer);
yylex_init_extra(&ctx, &ctx.scanner);
top_buffer = yy_scan_bytes(compile_info->source.code, compile_info->source.size, ctx.scanner);
preproc_yyparse(ctx.scanner, &ctx);
yy_delete_buffer(top_buffer, ctx.scanner);
yylex_destroy(ctx.scanner);
if (!(output_code = vkd3d_malloc(ctx.buffer.content_size)))
{
vkd3d_string_buffer_cleanup(&ctx.buffer);
return VKD3D_ERROR_OUT_OF_MEMORY;
}
memcpy(output_code, ctx.buffer.buffer, ctx.buffer.content_size);
out->size = ctx.buffer.content_size;
out->code = output_code;
vkd3d_string_buffer_trace(&ctx.buffer);
vkd3d_string_buffer_cleanup(&ctx.buffer);
return VKD3D_OK;
}