Imported Upstream version 1.4.8upstream/1.4.8

1 files changed, 190 insertions, 0 deletions

diff --git a/lib/scanner.l b/lib/scanner.l
new file mode 100644
index 0000000..2703eb6
--- /dev/null
+++ b/lib/scanner.l
@@ -0,0 +1,190 @@
+/* -*- mode: C -*- */
+/* --------------------------------------------------------------------------
+   libconfig - A library for processing structured configuration files
+   Copyright (C) 2005-2010  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/>.
+   ----------------------------------------------------------------------------
+*/
+
+%option nounistd
+%option reentrant
+%option noyywrap
+%option yylineno
+%option nounput
+%option bison-bridge
+%option header-file="scanner.h"
+%option outfile="lex.yy.c"
+%option extra-type="struct scan_context *"
+
+%{
+
+#ifdef _MSC_VER
+#pragma warning (disable: 4996)
+#endif
+
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+#include "grammar.h"
+#include "wincompat.h"
+#include "parsectx.h"
+#include "scanctx.h"
+
+#define YY_NO_INPUT // Suppress generation of useless input() function
+
+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__ */
+}
+
+%}
+
+true              [Tt][Rr][Uu][Ee]
+false             [Ff][Aa][Ll][Ss][Ee]
+name              [A-Za-z\*][-A-Za-z0-9_\*]*
+integer           [-+]?[0-9]+
+integer64         [-+]?[0-9]+L(L)?
+hex               0[Xx][0-9A-Fa-f]+
+hex64             0[Xx][0-9A-Fa-f]+L(L)?
+hexchar           \\[Xx][0-9A-Fa-f]{2}
+float             ([-+]?([0-9]*)?\.[0-9]*([eE][-+]?[0-9]+)?)|([-+]?([0-9]+)(\.[0-9]*)?[eE][-+]?[0-9]+)
+comment           (#|\/\/).*$
+include_open      ^[ \t]*@include[ \t]+\"
+
+%x COMMENT STRING INCLUDE
+
+%%
+
+\/\*              { BEGIN COMMENT; }
+<COMMENT>\*\/     { BEGIN INITIAL; }
+<COMMENT>.        { /* ignore */ }
+<COMMENT>\n       { /* ignore */ }
+
+\"                { BEGIN STRING; }
+<STRING>[^\"\\]+  { scanctx_append_string(yyextra, yytext); }
+<STRING>\\n       { scanctx_append_string(yyextra, "\n"); }
+<STRING>\\r       { scanctx_append_string(yyextra, "\r"); }
+<STRING>\\t       { scanctx_append_string(yyextra, "\t"); }
+<STRING>\\f       { scanctx_append_string(yyextra, "\f"); }
+<STRING>\\\\      { scanctx_append_string(yyextra, "\\"); }
+<STRING>\\\"      { scanctx_append_string(yyextra, "\""); }
+<STRING>{hexchar} {
+                    char c[2] = { (char)(strtol(yytext + 2, NULL, 16) & 0xFF),
+                                  0 };
+                    scanctx_append_string(yyextra, c);
+                  }
+<STRING>\"        {
+                    yylval->sval = scanctx_take_string(yyextra);
+                    BEGIN INITIAL;
+                    return(TOK_STRING);
+                  }
+
+{include_open}    { BEGIN INCLUDE; }
+<INCLUDE>[^\"\\]+ { scanctx_append_string(yyextra, yytext); }
+<INCLUDE>\\\\     { scanctx_append_string(yyextra, "\\"); }
+<INCLUDE>\\\"     { scanctx_append_string(yyextra, "\""); }
+<INCLUDE>\"       {
+                    const char *error;
+                    FILE *fp = scanctx_push_include(yyextra,
+                                                    (void *)YY_CURRENT_BUFFER,
+                                                    &error);
+                    if(fp)
+                    {
+                      yyin = fp;
+                      yy_switch_to_buffer(
+                        yy_create_buffer(yyin, YY_BUF_SIZE, yyscanner),
+                        yyscanner);
+                    }
+                    else
+                    {
+                      yyextra->config->error_text = error;
+                      yyextra->config->error_file = scanctx_current_filename(
+                        yyextra);
+                      yyextra->config->error_line = libconfig_yyget_lineno(
+                        yyscanner);
+                      return TOK_ERROR;
+                    }
+                    BEGIN INITIAL;
+                  }
+
+\n|\r|\f          { /* ignore */ }
+[ \t]+            { /* ignore */ }
+
+\=|\:             { return(TOK_EQUALS); }
+,                 { return(TOK_COMMA); }
+\{                { return(TOK_GROUP_START); }
+\}                { return(TOK_GROUP_END); }
+{true}            { yylval->ival = 1; return(TOK_BOOLEAN); }
+{false}           { yylval->ival = 0; return(TOK_BOOLEAN); }
+{name}            { yylval->sval = 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); }
+\[                { return(TOK_ARRAY_START); }
+\]                { return(TOK_ARRAY_END); }
+\(                { return(TOK_LIST_START); }
+\)                { return(TOK_LIST_END); }
+;                 { return(TOK_SEMICOLON); }
+{comment}         { /* ignore */ }
+.                 { return(TOK_GARBAGE); }
+
+<<EOF>>           {
+                    YY_BUFFER_STATE buf = (YY_BUFFER_STATE)scanctx_pop_include(
+                      yyextra);
+                    if(buf)
+                    {
+                      yy_delete_buffer(YY_CURRENT_BUFFER, yyscanner);
+                      yy_switch_to_buffer(buf, yyscanner);
+                    }
+                    else
+                      yyterminate();
+                  }