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|
%option nounput backup nostdinit noyywrap full ecs
%option 8bit backup nodefault perf-report perf-report
%x STRING
%{
/*
* Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
* Released under the terms of the GNU GPL v2.0.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "cml1.h"
char *text;
static char *text_ptr;
static int text_size, text_asize;
struct buffer {
struct buffer *parent;
YY_BUFFER_STATE state;
};
struct buffer *current_buf;
int lineno(void)
{
if (current_buf)
return current_file->lineno;
else
return 0;
}
void scan_init(char *file)
{
struct buffer *buf = malloc(sizeof(*buf));
memset(buf, 0, sizeof(*buf));
yyin = fopen(file, "r");
if (!yyin) {
printf("can't find file %s\n", file);
exit(1);
}
current_buf = buf;
current_file = lookup_file(file);
current_file->lineno = 0;
current_file->flags = FILE_BUSY;
}
void scan_nextfile(char *name)
{
struct file *file = lookup_file(name);
struct buffer *buf = malloc(sizeof(*buf));
memset(buf, 0, sizeof(*buf));
current_buf->state = YY_CURRENT_BUFFER;
yyin = fopen(name, "r");
if (!yyin) {
printf("can't find file %s\n", name);
exit(1);
}
yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
buf->parent = current_buf;
current_buf = buf;
if (file->flags & FILE_BUSY) {
printf("recursive scan (%s)?\n", name);
exit(1);
}
file->flags |= FILE_BUSY;
file->lineno = 0;
file->parent = current_file;
current_file = file;
}
#define START_STRSIZE 16
void new_string(void)
{
text = malloc(START_STRSIZE);
text_asize = START_STRSIZE;
text_ptr = text;
text_size = 0;
*text_ptr = 0;
}
void append_string(const char *str, int size)
{
int new_size = text_size + size + 1;
if (new_size > text_asize) {
text = realloc(text, new_size);
text_asize = new_size;
text_ptr = text + text_size;
}
memcpy(text_ptr, str, size);
text_ptr += size;
text_size += size;
*text_ptr = 0;
}
void alloc_string(const char *str, int size)
{
text = malloc(size + 1);
memcpy(text, str, size);
text[size] = 0;
}
%}
%%
int str = 0;
\"|\' {
str = yytext[0];
new_string();
BEGIN(STRING);
}
<STRING>{
[^'"\n\\]+ {
append_string(yytext, yyleng);
}
\'|\" {
if (str == yytext[0]) {
BEGIN(INITIAL);
cml1lval.string = text;
//printf("s:%s", text);
return str == '"' ? T_WORD_DQUOTE : T_WORD_QUOTE;
} else
append_string(yytext, 1);
}
\\[ \t]*\n append_string(yytext+yyleng-1, 1); current_file->lineno++;
\\[ \t]* append_string(yytext+1, yyleng-1);
\\. append_string(yytext+1, 1);
\n {
printf(":%d: open string!\n", current_file->lineno+1);
exit(0);
}
<<EOF>> {
printf(":%d: open string!\n", current_file->lineno+1);
exit(0);
}
}
mainmenu_name[ \t] return T_MAINMENU_NAME;
mainmenu_option[ \t] return T_MAINMENU_OPTION;
next_comment/[ \t\n] return T_NEXT_COMMENT;
endmenu/[ \t\n] return T_ENDMENU;
comment[ \t] return T_COMMENT;
bool[ \t] return T_BOOL;
hex[ \t] return T_HEX;
int[ \t] return T_INT;
string[ \t] return T_STRING;
tristate[ \t] return T_TRISTATE;
define_bool[ \t] return T_DEFINE_BOOL;
define_hex[ \t] return T_DEFINE_HEX;
define_int[ \t] return T_DEFINE_INT;
define_string[ \t] return T_DEFINE_STRING;
define_tristate[ \t] return T_DEFINE_TRISTATE;
dep_bool[ \t] return T_DEP_BOOL;
dep_mbool[ \t] return T_DEP_MBOOL;
dep_tristate[ \t] return T_DEP_TRISTATE;
unset[ \t] return T_UNSET;
choice[ \t] return T_CHOICE;
source[ \t] return T_SOURCE;
if[ \t] return T_IF;
else/[ \t\n] return T_ELSE;
fi/[ \t\n] return T_FI;
then/[ \t\n] return T_THEN;
\[ return '[';
\] return ']';
; return ';';
!= return T_UNEQUAL;
= return '=';
! return '!';
-a return T_AND;
-o return T_OR;
#[^\n]* {
/* comment */
current_file->lineno++;
alloc_string(yytext, yyleng);
cml1lval.string = text;
return T_SH_COMMENT;
}
[ \t]+ /* space */
\\\n current_file->lineno++; /* ignore */
\n {
current_file->lineno++;
return '\n';
}
[[:alnum:]$/][[:graph:]]* {
alloc_string(yytext, yyleng);
cml1lval.string = text;
//printf("w:%s", text);
return T_WORD;
}
. {
printf("%s:%d: invalid character 0x%x(%c)\n", current_file->name, current_file->lineno+1, yytext[0], yytext[0]);
exit(1);
}
<<EOF>> {
if (current_buf->parent) {
struct buffer *buf = current_buf;
current_buf = buf->parent;
current_file->flags |= FILE_SCANNED;
current_file->flags &= ~FILE_BUSY;
current_file = current_file->parent;
yy_delete_buffer(YY_CURRENT_BUFFER);
yy_switch_to_buffer(current_buf->state);
free(buf);
} else
yyterminate();
}
%%
|
