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/* flex -o cparse_lex.c cparse_lex.l */
/* definitions */
%x sComment
%x sID
%x sValue
%x sQStr
%option noyywrap
ID ([-[:alnum:]_]+)
SPACE ([[:space:]]{-}[\n])
%{
#include <string.h>
#include "cparse_def.h"
#include "cparse.h"
#define STR_BUF_INC 4096
int line_number = 0;
int node_deactivated = 0;
char *str_buf = NULL;
char *out_buf = NULL;
char *str_ptr = NULL;
size_t str_buf_len = 0;
void
append_str(char *text)
{
size_t tlen = strlen(text);
size_t slen = str_ptr - str_buf;
if (!str_buf || (slen + tlen) >= str_buf_len) {
str_buf_len += STR_BUF_INC;
str_buf = realloc(str_buf, str_buf_len);
out_buf = realloc(out_buf, str_buf_len);
if (!str_buf || !out_buf) {
printf("realloc failed\n");
exit(1);
}
str_ptr = str_buf + slen;
}
strcpy(str_ptr, text);
str_ptr += tlen;
}
void
set_ret_str()
{
*str_ptr = 0;
strcpy(out_buf, str_buf);
str_ptr = str_buf;
}
%}
%%
<INITIAL>"/*" {
BEGIN(sComment);
}
<sComment>[^*\n]* {
append_str(yytext);
}
<sComment>\*[^/] {
append_str(yytext);
}
<sComment>\n {
append_str(yytext);
++line_number;
}
<sComment>"*/" {
set_ret_str();
yylval.str = strdup(out_buf);
BEGIN(INITIAL);
return COMMENT;
}
<INITIAL>! {
node_deactivated = 1;
}
<INITIAL>[[:space:]]+ {
}
<INITIAL>\} {
node_deactivated = 0;
return RIGHTB;
}
<INITIAL>{ID} {
yylval.str = strdup(yytext);
yylval.deactivated = node_deactivated;
node_deactivated = 0;
BEGIN(sID);
return NODE;
}
<sID>:?{SPACE}+[^{\n] {
unput(yytext[yyleng - 1]);
BEGIN(sValue);
}
<sID>{SPACE}+ {
}
<sID>\{ {
BEGIN(INITIAL);
return LEFTB;
}
<sID>\n {
++line_number;
BEGIN(INITIAL);
}
<sValue>{SPACE}+ {
/* ignore spaces */
}
<sValue>\" {
/* quoted string */
BEGIN(sQStr);
}
<sQStr>[^\"\\\n]+ {
append_str(yytext);
}
<sQStr>\\. {
char tmp[2] = { yytext[1], 0 };
append_str(tmp);
}
<sQStr>\n {
append_str(yytext);
++line_number;
}
<sQStr>\" {
set_ret_str();
yylval.str = strdup(out_buf);
BEGIN(sValue);
return VALUE;
}
<sValue>[^{"[:space:]][^{[:space:]]+ {
/* unquoted string */
yylval.str = strdup(yytext);
return VALUE;
}
<sValue>\{ {
BEGIN(INITIAL);
return LEFTB;
}
<sValue>\n {
++line_number;
BEGIN(INITIAL);
}
%%
/* code */
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