mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-27 22:52:21 +00:00
ea3895805b
That which isn't rewritten is horribly broken. However, this does include a nice mechanism for building QC structs for emitting data. emit.c has been gutted in the spirit of "throw one away". There is much work to be done to get even variables emitted, let alone code. Things should be a little more fun from here on.
304 lines
6.5 KiB
Text
304 lines
6.5 KiB
Text
%{
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/*
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qp-lex.l
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lexer for QuakePascal
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Copyright (C) 2011 Bill Currie <bill@taniwha.org>
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Author: Bill Currie <bill@taniwha.org>
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Date: 2011/01/06
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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static __attribute__ ((used)) const char rcsid[] = "$Id$";
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#include "QF/hash.h"
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#include "debug.h"
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#include "expr.h"
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#include "grab.h"
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#include "qfcc.h"
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#include "symtab.h"
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#include "type.h"
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#include "qp-parse.h"
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#ifndef YY_PROTO
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# define YY_PROTO(x) x
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#else
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# define YY_FLEX_REALLOC_HACK
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#endif
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int yyget_lineno (void);
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FILE *yyget_in (void);
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FILE *yyget_out (void);
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int yyget_leng (void);
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char *yyget_text (void);
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void yyset_lineno (int line_number);
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void yyset_in (FILE * in_str);
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void yyset_out (FILE * out_str);
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int yyget_debug (void);
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void yyset_debug (int bdebug);
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int yylex_destroy (void);
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#define YY_NO_UNPUT
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#define YY_DECL int yylex YY_PROTO(( void ))
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YY_DECL;
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static int keyword_or_id (const char *token);
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static int convert_relop (const char *relop);
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%}
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s [ \t]
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m [\-+]
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D [0-9]
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X [0-9a-fA-F]
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ID [a-zA-Z_][0-9a-zA-Z_]*
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FLOAT ({D}+|{D}*\.{D}+|{D}+\.{D}*)([eE]{m}?{D}+)?
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INTEGER ({D}+|0[xX]{X}+)
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RELOP (=|<>|[<>]=?)
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ADDOP [\-+]
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MULOP [*/]
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ASSIGNOP :=
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RANGE \.\.
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ELLIPSIS \.\.\.
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FRAMEID {ID}(\.{ID})*
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%x GRAB_FRAME GRAB_OTHER COMMENT
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%%
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grab_frame = GRAB_FRAME;
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grab_other = GRAB_OTHER;
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"{" { BEGIN (COMMENT); }
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<COMMENT>"{" { warning (0, "nested { in comment"); }
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<COMMENT>"}" { BEGIN (INITIAL); }
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"(*" { BEGIN (COMMENT); }
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<COMMENT>"(*" { warning (0, "nested (* in comment"); }
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<COMMENT>"*)" { BEGIN (INITIAL); }
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<COMMENT>\r*\n { pr.source_line++; }
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<COMMENT>. /* nothing to do, with people like you */
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<COMMENT><<EOF>> { error (0, "EOF in comment"); return 0; }
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"//".* /* nothing to do, with people like you */
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^#{s}+{D}+{s}+\"(\.|[^"\n])*\".*$ { line_info (yytext + 1); }
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^#line{s}+{D}+{s}+\"(\.|[^"\n])*\".*$ { line_info (yytext + 1); }
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{INTEGER} {
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int i = strtol (yytext, 0, 0);
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yylval.expr = new_integer_expr (i);
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return CONST;
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}
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{FLOAT} {
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float f = strtof (yytext, 0);
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yylval.expr = new_float_expr (f);
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return CONST;
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}
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{ID} return keyword_or_id (yytext);
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\"(\\.|[^"\\])*\" {
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const char *s = make_string (yytext, 0);
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yylval.expr = new_string_expr (s);
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return CONST;
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}
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'{s}*{m}{FLOAT}{s}+{m}{FLOAT}{s}+{m}{FLOAT}{s}*' {
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vec3_t v;
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sscanf (yytext, "' %f %f %f '",
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&v[0], &v[1], &v[2]);
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yylval.expr = new_vector_expr (v);
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return CONST;
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}
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'{s}*{m}{FLOAT}{s}+{m}{FLOAT}{s}+{m}{FLOAT}{s}+{m}{FLOAT}{s}*' {
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quat_t q;
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sscanf (yytext, "' %f %f %f %f'",
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&q[0], &q[1], &q[2], &q[3]);
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yylval.expr = new_quaternion_expr (q);
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return CONST;
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}
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{RELOP} {
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yylval.op = convert_relop (yytext);
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return RELOP;
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}
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{ADDOP} {
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yylval.op = yytext[0];
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return ADDOP;
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}
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{MULOP} {
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yylval.op = yytext[0];
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return MULOP;
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}
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{ASSIGNOP} return ASSIGNOP;
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{RANGE} return RANGE;
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{ELLIPSIS} return ELLIPSIS;
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[!(){}.&|^~\[\];,#%?:] return yytext[0];
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"$"{s}*{FRAMEID} {
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int ret = do_grab (yytext);
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if (ret >= 0) {
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yylval.expr = new_integer_expr (ret);
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return CONST;
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} else {
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BEGIN (-ret);
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}
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}
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<GRAB_FRAME>{FRAMEID} add_frame_macro (yytext);
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<GRAB_OTHER>[^\r\n]* /* skip */
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<*>\r*\n {
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pr.source_line++;
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BEGIN (INITIAL);
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}
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<*>{s}* /* skip whitespace */
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<*>. error (0, "all your typo are belong to us");
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%%
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int
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yywrap (void)
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{
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return 1;
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}
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typedef struct {
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const char *name;
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int value;
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type_t *type;
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} keyword_t;
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static keyword_t keywords[] = {
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{"real", TYPE, &type_float},
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{"string", TYPE, &type_string},
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{"vector", TYPE, &type_vector},
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{"entity", TYPE, &type_entity},
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{"quaternion", TYPE, &type_quaternion},
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{"integer", TYPE, &type_integer},
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{"program", PROGRAM, 0},
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{"var", VAR, 0},
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{"array", ARRAY, 0},
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{"of", OF, 0},
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{"function", FUNCTION, 0},
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{"procedure", PROCEDURE, 0},
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{"begin", PBEGIN, 0},
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{"end", END, 0},
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{"if", IF, 0},
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{"then", THEN, 0},
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{"else", ELSE, 0},
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{"while", WHILE, 0},
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{"do", DO, 0},
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{"or", ADDOP, 0},
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{"div", MULOP, 0},
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{"mod", MULOP, 0},
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{"and", MULOP, 0},
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{"not", NOT, 0},
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};
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static const char *
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keyword_get_key (void *kw, void *unused)
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{
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return ((keyword_t *) kw)->name;
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}
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static int
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keyword_or_id (const char *token)
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{
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static hashtab_t *keyword_tab;
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keyword_t *keyword;
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symbol_t *sym;
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if (!keyword_tab) {
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size_t i;
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keyword_tab = Hash_NewTable (1021, keyword_get_key, 0, 0);
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for (i = 0; i < sizeof (keywords) / sizeof (keywords[0]); i++)
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Hash_Add (keyword_tab, &keywords[i]);
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}
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keyword = Hash_Find (keyword_tab, token);
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if (keyword) {
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if (keyword->value == ADDOP || keyword->value == MULOP) {
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yylval.op = token[0];
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} else {
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yylval.type = keyword->type;
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}
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return keyword->value;
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}
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sym = symtab_lookup (current_symtab, token);
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if (!sym)
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sym = new_symbol (token);
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if (sym->sy_type == sy_type) {
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yylval.type = sym->type;
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return TYPE_NAME;
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}
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yylval.symbol = sym;
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return ID;
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}
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static int
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convert_relop (const char *relop)
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{
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switch (relop[0]) {
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case '=':
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return EQ;
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case '<':
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switch (relop[1]) {
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case 0:
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return LT;
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case '>':
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return NE;
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case '=':
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return LE;
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}
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break;
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case '>':
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switch (relop[1]) {
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case 0:
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return GT;
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case '=':
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return GE;
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}
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break;
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}
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error (0, "internal: bad relop %s", relop);
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return EQ;
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}
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#ifdef YY_FLEX_REALLOC_HACK
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static __attribute__ ((used)) void *(*const yy_flex_realloc_hack)(void *,yy_size_t) = yy_flex_realloc;
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#else
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static __attribute__ ((used)) void (*yyunput_hack)(int, char*) = yyunput;
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static __attribute__ ((used)) int (*input_hack)(void) = input;
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#endif
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