mirror of
https://github.com/rn10950/RetroZilla.git
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138 lines
3.6 KiB
Plaintext
138 lines
3.6 KiB
Plaintext
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* lex file for analyzing PKCS #11 Module installation instructions */
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/*----------------------------- Definitions ---------------------------*/
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%{
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#include <string.h>
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#include "install-ds.h" /* defines tokens and data structures */
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#include "installparse.h" /* produced by yacc -d */
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#include <prprf.h>
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static char *putSimpleString(char*); /* return copy of string */
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static char *putComplexString(char*); /* strip out quotes, deal with */
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/* escaped characters */
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void Pk11Install_yyerror(char *);
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/* Overrides to use NSPR */
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#define malloc PR_Malloc
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#define realloc PR_Realloc
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#define free PR_Free
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int Pk11Install_yylinenum=1;
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static char *err;
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#define YY_NEVER_INTERACTIVE 1
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#define yyunput Pkcs11Install_yyunput
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/* This is the default YY_INPUT modified for NSPR */
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#define YY_INPUT(buf,result,max_size) \
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if ( yy_current_buffer->yy_is_interactive ) { \
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char c; \
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int n; \
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for ( n = 0; n < max_size && \
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PR_Read(Pk11Install_FD, &c, 1)==1 && c != '\n'; ++n ) { \
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buf[n] = c; \
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} \
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if ( c == '\n' ) { \
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buf[n++] = c; \
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} \
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result = n; \
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} else { \
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result = PR_Read(Pk11Install_FD, buf, max_size); \
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}
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%}
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/*** Regular expression definitions ***/
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/* simple_string has no whitespace, quotes, or braces */
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simple_string [^ \t\r\n\""{""}"]+
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/* complex_string is enclosed in quotes. Inside the quotes, quotes and
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backslashes must be backslash-escaped. No newlines or carriage returns
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are allowed inside the quotes. Otherwise, anything goes. */
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complex_string \"([^\"\\\r\n]|(\\\")|(\\\\))+\"
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/* Standard whitespace */
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whitespace [ \t\r]+
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other .
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/*---------------------------- Actions --------------------------------*/
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%%
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"{" return OPENBRACE;
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"}" return CLOSEBRACE;
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{simple_string} {Pk11Install_yylval.string =
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putSimpleString(Pk11Install_yytext);
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return STRING;}
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{complex_string} {Pk11Install_yylval.string =
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putComplexString(Pk11Install_yytext);
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return STRING;}
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"\n" Pk11Install_yylinenum++;
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{whitespace} ;
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{other} {err = PR_smprintf("Invalid lexeme: %s",Pk11Install_yytext);
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Pk11Install_yyerror(err);
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PR_smprintf_free(err);
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return 1;
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}
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%%
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/*------------------------ Program Section ----------------------------*/
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PRFileDesc *Pk11Install_FD=NULL;
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/*************************************************************************/
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/* dummy function required by lex */
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int Pk11Install_yywrap(void) { return 1;}
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/*************************************************************************/
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/* Return a copy of the given string */
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static char*
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putSimpleString(char *str)
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{
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char *tmp = (char*) PR_Malloc(strlen(str)+1);
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strcpy(tmp, str);
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return tmp;
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}
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/*************************************************************************/
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/* Strip out quotes, replace escaped characters with what they stand for.
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This function assumes that what is passed in is actually a complex
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string, so error checking is lax. */
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static char*
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putComplexString(char *str)
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{
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int size, i,j;
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char *tmp;
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if(!str) {
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return NULL;
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}
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size = strlen(str);
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/* Allocate the new space. This string will actually be too big,
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since quotes and backslashes will be stripped out. But that's ok. */
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tmp = (char*) PR_Malloc(size+1);
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/* Copy it over */
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for(i=0, j=0; i < size; i++) {
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if(str[i]=='\"') {
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continue; /* skip un-escaped quotes */
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} else if(str[i]=='\\') {
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++i; /* escaped character. skip the backslash */
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}
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tmp[j++] = str[i];
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}
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tmp[j] = '\0';
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return tmp;
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}
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