diff options
Diffstat (limited to 'scanner.l')
| -rw-r--r-- | scanner.l | 222 |
1 files changed, 0 insertions, 222 deletions
diff --git a/scanner.l b/scanner.l deleted file mode 100644 index 1f9c73d..0000000 --- a/scanner.l +++ /dev/null @@ -1,222 +0,0 @@ -/* -*- mode: C -*- */ -/* -------------------------------------------------------------------------- - libconfig - A library for processing structured configuration files - Copyright (C) 2005-2009 Mark A Lindner - - This file is part of libconfig. - - This library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public License - as published by the Free Software Foundation; either version 2.1 of - the License, or (at your option) any later version. - - This library is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with this library; if not, see - <http://www.gnu.org/licenses/>. - ---------------------------------------------------------------------------- -*/ - -%{ -#define YY_EXTRA_TYPE void* -%} - -%option nounistd -%option reentrant -%option noyywrap -%option yylineno -%option nounput -%option bison-bridge -%option header-file="scanner.h" -%option outfile="lex.yy.c" - -%{ - -#ifdef _MSC_VER -#pragma warning (disable: 4996) -#endif - -#include <stdlib.h> -#include <ctype.h> -#include <string.h> -#include "grammar.h" -#include "wincompat.h" - -/* this is somewhat kludgy, but I wanted to avoid building strings - dynamically during scanning */ - -static char *make_string(char *s) -{ - char *r = ++s; - char *p, *q = r; - size_t len = strlen(r); - int esc = 0; - - *(r + --len) = 0; - - for(p = r; *p; p++) - { - if(*p == '\\') - { - if(! esc) - { - esc = 1; - continue; - } - } - - if(esc) - { - if(*p == 'n') - *(q++) = '\n'; - else if(*p == 'r') - *(q++) = '\r'; - else if(*p == 'f') - *(q++) = '\f'; - else if(*p == 't') - *(q++) = '\t'; - else - *(q++) = *p; - - esc = 0; - } - - else if(*p == '\"') /* if we reached the end of a string segment, ... */ - { - /* This construction allows for C-style string concatenation. - We don't bother to check for end-of-string here, as we depend - on the {string} definition to ensure a new opening quote exists. - We do, however, check for and discard all forms of comments - [that is, (#...$|//...$|[/][*]...[*][/])] between string segments. */ - - while (*++p != '\"') /* ... look for the start of the next segment */ - { - if(*p == '#') /* check for #...$ comment */ - { - while(*++p != '\n') - { - /* skip the rest of the line */ - } - } - else if (*p == '/') - { - if(*++p == '/') /* check for //...$ comment */ - { - while (*++p != '\n') - { - /* skip the rest of the line */ - } - } - else /* must be '*', lead-in to an old C-style comment */ - { - while (*++p != '*' || *(p+1) != '/') - { - /* skip all comment content */ - } - ++p; /* step to the trailing slash, to skip it as well */ - } - } - } - } - else - *(q++) = *p; - } - - *q = 0; - - return(r); -} - -static unsigned long long fromhex(const char *s) -{ -#ifdef __MINGW32__ - - // MinGW's strtoull() seems to be broken; it only returns the lower - // 32 bits... - - const char *p = s; - unsigned long long val = 0; - - if(*p != '0') - return(0); - - ++p; - - if(*p != 'x' && *p != 'X') - return(0); - - for(++p; isxdigit(*p); ++p) - { - val <<= 4; - val |= ((*p < 'A') ? (*p & 0xF) : (9 + (*p & 0x7))); - } - - return(val); - -#else // ! __MINGW32__ - - return(strtoull(s, NULL, 16)); - -#endif // __MINGW32__ -} - -%} - -ws [ \t\f\r\n]+ -equals \=|\: -comma , -group_start \{ -group_end \} -true [Tt][Rr][Uu][Ee] -false [Ff][Aa][Ll][Ss][Ee] -name [A-Za-z\*][-A-Za-z0-9_\*]* -quote \" -integer [-+]?[0-9]+ -integer64 [-+]?[0-9]+L(L)? -hex 0[Xx][0-9A-Fa-f]+ -hex64 0[Xx][0-9A-Fa-f]+L(L)? -float ([-+]?([0-9]*)?\.[0-9]*([eE][-+]?[0-9]+)?)|([-+]?([0-9]+)(\.[0-9]*)?[eE][-+]?[0-9]+) -segment {quote}([^\"\\]|\\.)*{quote} -string {segment}(([ \t\f\r\n]*((#|\/\/).*\n|\/\*(.|\n)*\*\/)*)*{segment})* -end ; -array_start \[ -array_end \] -list_start \( -list_end \) -comment (#|\/\/).*$ - -%x COMMENT - -%% - -\/\* { BEGIN COMMENT; } -<COMMENT>\*\/ { BEGIN INITIAL; } -<COMMENT>. { /* ignore */ } -<COMMENT>\n { } - -{ws} { /* skip */ } - -{equals} { return(TOK_EQUALS); } -{comma} { return(TOK_COMMA); } -{group_start} { return(TOK_GROUP_START); } -{group_end} { return(TOK_GROUP_END); } -{true} { yylval->ival = 1; return(TOK_BOOLEAN); } -{false} { yylval->ival = 0; return(TOK_BOOLEAN); } -{name} { yylval->sval = strdup(yytext); return(TOK_NAME); } -{float} { yylval->fval = atof(yytext); return(TOK_FLOAT); } -{integer} { yylval->ival = atoi(yytext); return(TOK_INTEGER); } -{integer64} { yylval->llval = atoll(yytext); return(TOK_INTEGER64); } -{hex} { yylval->ival = strtoul(yytext, NULL, 16); return(TOK_HEX); } -{hex64} { yylval->llval = fromhex(yytext); return(TOK_HEX64); } -{string} { yylval->sval = strdup(make_string(yytext)); return(TOK_STRING); } -{array_start} { return(TOK_ARRAY_START); } -{array_end} { return(TOK_ARRAY_END); } -{list_start} { return(TOK_LIST_START); } -{list_end} { return(TOK_LIST_END); } -{end} { return(TOK_END); } -{comment} { /* ignore */ } -. { return(TOK_GARBAGE); } |