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/* proplist.l - for parsing NSString property lists -*- c -*- */
/* definition section */
/* literal block */
%{
#include "proplist.h"
#include "proplist.tab.h"
#include "util.h"
#include "util.h"
#ifdef yywrap
#undef yywrap
#endif
int yywrap(void) {
return 1;
}
#define return_data(str) yylval.obj = str2data(str); return DATA
char * unescstr(char * src);
proplist_t str2data(char * str);
extern char plinput[];
extern char *plinputptr;
extern char *plinputlim;
int pl_line_count = 1;
static int level;
%}
/* pattern definitions */
ws [ \t\r]
nl \n
wsnl [ \t\r\n]
hexdigit [0-9A-Fa-f]
hexbyte {hexdigit}{2}
hexword {hexbyte}{4}
hexnum {hexbyte}{1,3}
qstring [^"]*\"
noquote [$./0-9A-Z_a-z]
unqstring {noquote}+
hexdata \<{ws}*({hexword}{ws}*)*{hexnum}{0,1}{ws}*\>
/* exclusive states */
%x QUOTE COMMENT LINE_COMMENT
/* rules section */
%%
"/*" {++level; BEGIN COMMENT;}
"//" {BEGIN LINE_COMMENT;}
<QUOTE>{qstring} {
if(yyleng==1) {
BEGIN INITIAL;
yylval.obj = PLMakeString("");
return STRING;
}
if(yytext[yyleng-2] == '\\') {
yymore();
} else {
char *unesc;
BEGIN INITIAL;
unesc = unescstr(yytext);
yylval.obj = PLMakeString(unesc);
MyFree(__FILE__, __LINE__, unesc);
return STRING;
}
}
<COMMENT>"*/" {if(!--level) BEGIN INITIAL;}
<COMMENT>. ;
<COMMENT><<EOF>> {return 0;}
<LINE_COMMENT>\n {BEGIN INITIAL; pl_line_count++;}
<LINE_COMMENT>. ;
{unqstring} {yylval.obj = PLMakeString(yytext); return STRING;}
{hexdata} {return_data(yytext);}
\" {BEGIN QUOTE;}
{ws}+ ;
{nl}+ {pl_line_count += yyleng;} /* skip whitespace */
<<EOF>> {return 0;}
. {return yytext[0];} /* return unmatched characters
literally*/
%%
/* C code section */
#define inrange(ch,min,max) ((ch)>=(min) && (ch)<=(max))
#define char2num(ch) \
inrange(ch,'0','9') \
? ((ch)-0x30) \
: (inrange(ch,'a','f') \
? ((ch)-0x57) : ((ch)-0x37))
proplist_t
str2data (char *str)
{
unsigned char *buf, *str_ptr, *buf_ptr;
char ch;
int len;
proplist_t data;
buf=(unsigned char *)MyMalloc(__FILE__, __LINE__, strlen(str));
for (str_ptr=(unsigned char *)str+1, buf_ptr=buf,len=0;
(ch = *str_ptr) != '>';
str_ptr++)
{
if(ch==' ' || ch=='\n' || ch=='\t' || ch=='\r')
continue; /* ignore whitespace */
*buf_ptr = (char2num(ch))<<4;
ch = *++str_ptr;
*buf_ptr |= char2num(ch);
len++; buf_ptr++;
}
data = PLMakeData(buf,len);
MyFree(__FILE__, __LINE__, buf);
return data;
}
char *
unescstr (char *src)
{
char *dest=(char*) MyMalloc (__FILE__, __LINE__, strlen(src));
char *src_ptr, *dest_ptr;
char ch;
/* blow away that terminating quote for good measure */
src[strlen(src)-1] = '\0';
for (src_ptr=src,dest_ptr=dest;
*src_ptr;
src_ptr++, dest_ptr++)
{
if(*src_ptr != '\\')
*dest_ptr = *src_ptr;
else
{
ch = *(++src_ptr);
if((ch>='0') && (ch<='3')) /* assume next 2 chars are octal too */
{
*dest_ptr = ((ch & 07) << 6);
*dest_ptr |= ((*(++src_ptr)&07)<<3);
*dest_ptr |= (*(++src_ptr))&07;
}
else
{
switch(ch)
{
case 'a' : *dest_ptr = '\a'; break;
case 'b' : *dest_ptr = '\b'; break;
case 't' : *dest_ptr = '\t'; break;
case 'r' : *dest_ptr = '\r'; break;
case 'n' : *dest_ptr = '\n'; break;
case 'v' : *dest_ptr = '\v'; break;
case 'f' : *dest_ptr = '\f'; break;
default : *dest_ptr = *src_ptr;
}
}
}
}
*dest_ptr = '\0'; /* terminate dest */
return dest;
}
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