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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
/* lex file for analyzing PKCS #11 Module installation instructions */
/*----------------------------- Definitions ---------------------------*/
%{
#include <string.h>
#include "install-ds.h" /* defines tokens and data structures */
#include "installparse.h" /* produced by yacc -d */
#include <prprf.h>
static char *putSimpleString(char*); /* return copy of string */
static char *putComplexString(char*); /* strip out quotes, deal with */
/* escaped characters */
void Pk11Install_yyerror(char *);
/* Overrides to use NSPR */
#define malloc PR_Malloc
#define realloc PR_Realloc
#define free PR_Free
int Pk11Install_yylinenum=1;
static char *err;
#define YY_NEVER_INTERACTIVE 1
#define yyunput Pkcs11Install_yyunput
/* This is the default YY_INPUT modified for NSPR */
#define YY_INPUT(buf,result,max_size) \
if ( yy_current_buffer->yy_is_interactive ) { \
char c; \
int n; \
for ( n = 0; n < max_size && \
PR_Read(Pk11Install_FD, &c, 1)==1 && c != '\n'; ++n ) { \
buf[n] = c; \
} \
if ( c == '\n' ) { \
buf[n++] = c; \
} \
result = n; \
} else { \
result = PR_Read(Pk11Install_FD, buf, max_size); \
}
%}
/*** Regular expression definitions ***/
/* simple_string has no whitespace, quotes, or braces */
simple_string [^ \t\r\n\""{""}"]+
/* complex_string is enclosed in quotes. Inside the quotes, quotes and
backslashes must be backslash-escaped. No newlines or carriage returns
are allowed inside the quotes. Otherwise, anything goes. */
complex_string \"([^\"\\\r\n]|(\\\")|(\\\\))+\"
/* Standard whitespace */
whitespace [ \t\r]+
other .
/*---------------------------- Actions --------------------------------*/
%%
"{" return OPENBRACE;
"}" return CLOSEBRACE;
{simple_string} {Pk11Install_yylval.string =
putSimpleString(Pk11Install_yytext);
return STRING;}
{complex_string} {Pk11Install_yylval.string =
putComplexString(Pk11Install_yytext);
return STRING;}
"\n" Pk11Install_yylinenum++;
{whitespace} ;
{other} {err = PR_smprintf("Invalid lexeme: %s",Pk11Install_yytext);
Pk11Install_yyerror(err);
PR_smprintf_free(err);
return 1;
}
%%
/*------------------------ Program Section ----------------------------*/
PRFileDesc *Pk11Install_FD=NULL;
/*************************************************************************/
/* dummy function required by lex */
int Pk11Install_yywrap(void) { return 1;}
/*************************************************************************/
/* Return a copy of the given string */
static char*
putSimpleString(char *str)
{
char *tmp = (char*) PR_Malloc(strlen(str)+1);
strcpy(tmp, str);
return tmp;
}
/*************************************************************************/
/* Strip out quotes, replace escaped characters with what they stand for.
This function assumes that what is passed in is actually a complex
string, so error checking is lax. */
static char*
putComplexString(char *str)
{
int size, i,j;
char *tmp;
if(!str) {
return NULL;
}
size = strlen(str);
/* Allocate the new space. This string will actually be too big,
since quotes and backslashes will be stripped out. But that's ok. */
tmp = (char*) PR_Malloc(size+1);
/* Copy it over */
for(i=0, j=0; i < size; i++) {
if(str[i]=='\"') {
continue; /* skip un-escaped quotes */
} else if(str[i]=='\\') {
++i; /* escaped character. skip the backslash */
}
tmp[j++] = str[i];
}
tmp[j] = '\0';
return tmp;
}