1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/security/nss/cmd/modutil/installparse.l Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,137 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +
1.9 +/* lex file for analyzing PKCS #11 Module installation instructions */
1.10 +
1.11 +/*----------------------------- Definitions ---------------------------*/
1.12 +%{
1.13 +#include <string.h>
1.14 +
1.15 +#include "install-ds.h" /* defines tokens and data structures */
1.16 +#include "installparse.h" /* produced by yacc -d */
1.17 +#include <prprf.h>
1.18 +static char *putSimpleString(char*); /* return copy of string */
1.19 +static char *putComplexString(char*); /* strip out quotes, deal with */
1.20 + /* escaped characters */
1.21 +
1.22 +void Pk11Install_yyerror(char *);
1.23 +
1.24 +/* Overrides to use NSPR */
1.25 +#define malloc PR_Malloc
1.26 +#define realloc PR_Realloc
1.27 +#define free PR_Free
1.28 +
1.29 +int Pk11Install_yylinenum=1;
1.30 +static char *err;
1.31 +
1.32 +#define YY_NEVER_INTERACTIVE 1
1.33 +#define yyunput Pkcs11Install_yyunput
1.34 +
1.35 +/* This is the default YY_INPUT modified for NSPR */
1.36 +#define YY_INPUT(buf,result,max_size) \
1.37 + if ( yy_current_buffer->yy_is_interactive ) { \
1.38 + char c; \
1.39 + int n; \
1.40 + for ( n = 0; n < max_size && \
1.41 + PR_Read(Pk11Install_FD, &c, 1)==1 && c != '\n'; ++n ) { \
1.42 + buf[n] = c; \
1.43 + } \
1.44 + if ( c == '\n' ) { \
1.45 + buf[n++] = c; \
1.46 + } \
1.47 + result = n; \
1.48 + } else { \
1.49 + result = PR_Read(Pk11Install_FD, buf, max_size); \
1.50 + }
1.51 +
1.52 +%}
1.53 +
1.54 +/*** Regular expression definitions ***/
1.55 +/* simple_string has no whitespace, quotes, or braces */
1.56 +simple_string [^ \t\r\n\""{""}"]+
1.57 +
1.58 +/* complex_string is enclosed in quotes. Inside the quotes, quotes and
1.59 + backslashes must be backslash-escaped. No newlines or carriage returns
1.60 + are allowed inside the quotes. Otherwise, anything goes. */
1.61 +complex_string \"([^\"\\\r\n]|(\\\")|(\\\\))+\"
1.62 +
1.63 +/* Standard whitespace */
1.64 +whitespace [ \t\r]+
1.65 +
1.66 +other .
1.67 +
1.68 +/*---------------------------- Actions --------------------------------*/
1.69 +%%
1.70 +
1.71 +"{" return OPENBRACE;
1.72 +"}" return CLOSEBRACE;
1.73 +{simple_string} {Pk11Install_yylval.string =
1.74 + putSimpleString(Pk11Install_yytext);
1.75 + return STRING;}
1.76 +{complex_string} {Pk11Install_yylval.string =
1.77 + putComplexString(Pk11Install_yytext);
1.78 + return STRING;}
1.79 +
1.80 +"\n" Pk11Install_yylinenum++;
1.81 +
1.82 +{whitespace} ;
1.83 +
1.84 +{other} {err = PR_smprintf("Invalid lexeme: %s",Pk11Install_yytext);
1.85 + Pk11Install_yyerror(err);
1.86 + PR_smprintf_free(err);
1.87 + return 1;
1.88 + }
1.89 +
1.90 +%%
1.91 +/*------------------------ Program Section ----------------------------*/
1.92 +
1.93 +PRFileDesc *Pk11Install_FD=NULL;
1.94 +
1.95 +/*************************************************************************/
1.96 +/* dummy function required by lex */
1.97 +int Pk11Install_yywrap(void) { return 1;}
1.98 +
1.99 +/*************************************************************************/
1.100 +/* Return a copy of the given string */
1.101 +static char*
1.102 +putSimpleString(char *str)
1.103 +{
1.104 + char *tmp = (char*) PR_Malloc(strlen(str)+1);
1.105 + strcpy(tmp, str);
1.106 + return tmp;
1.107 +}
1.108 +
1.109 +/*************************************************************************/
1.110 +/* Strip out quotes, replace escaped characters with what they stand for.
1.111 + This function assumes that what is passed in is actually a complex
1.112 + string, so error checking is lax. */
1.113 +static char*
1.114 +putComplexString(char *str)
1.115 +{
1.116 + int size, i,j;
1.117 + char *tmp;
1.118 +
1.119 + if(!str) {
1.120 + return NULL;
1.121 + }
1.122 + size = strlen(str);
1.123 +
1.124 + /* Allocate the new space. This string will actually be too big,
1.125 + since quotes and backslashes will be stripped out. But that's ok. */
1.126 + tmp = (char*) PR_Malloc(size+1);
1.127 +
1.128 + /* Copy it over */
1.129 + for(i=0, j=0; i < size; i++) {
1.130 + if(str[i]=='\"') {
1.131 + continue; /* skip un-escaped quotes */
1.132 + } else if(str[i]=='\\') {
1.133 + ++i; /* escaped character. skip the backslash */
1.134 + }
1.135 + tmp[j++] = str[i];
1.136 + }
1.137 + tmp[j] = '\0';
1.138 +
1.139 + return tmp;
1.140 +}
