d2_lexer.ll 22.8 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
/* Copyright (C) 2017 Internet Systems Consortium, Inc. ("ISC")

   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
   file, You can obtain one at http://mozilla.org/MPL/2.0/. */

%{ /* -*- C++ -*- */
#include <cerrno>
#include <climits>
#include <cstdlib>
#include <string>
#include <d2/parser_context.h>
#include <asiolink/io_address.h>
#include <boost/lexical_cast.hpp>
#include <exceptions/exceptions.h>

17 18 19 20 21 22
/* Please avoid C++ style comments (// ... eol) as they break flex 2.6.2 */

/* Work around an incompatibility in flex (at least versions
   2.5.31 through 2.5.33): it generates code that does
   not conform to C89.  See Debian bug 333231
   <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=333231>. */
23 24 25 26 27 28 29 30 31 32 33 34
# undef yywrap
# define yywrap() 1

namespace {

bool start_token_flag = false;

isc::d2::D2ParserContext::ParserType start_token_value;
unsigned int comment_start_line = 0;

};

35
/* To avoid the call to exit... oops! */
36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87
#define YY_FATAL_ERROR(msg) isc::d2::D2ParserContext::fatal(msg)
%}

/* noyywrap disables automatic rewinding for the next file to parse. Since we
   always parse only a single string, there's no need to do any wraps. And
   using yywrap requires linking with -lfl, which provides the default yywrap
   implementation that always returns 1 anyway. */
%option noyywrap

/* nounput simplifies the lexer, by removing support for putting a character
   back into the input stream. We never use such capability anyway. */
%option nounput

/* batch means that we'll never use the generated lexer interactively. */
%option batch

/* avoid to get static global variables to remain with C++. */
/* in last resort %option reentrant */

/* Enables debug mode. To see the debug messages, one needs to also set
   yy_flex_debug to 1, then the debug messages will be printed on stderr. */
%option debug

/* I have no idea what this option does, except it was specified in the bison
   examples and Postgres folks added it to remove gcc 4.3 warnings. Let's
   be on the safe side and keep it. */
%option noinput

%x COMMENT
%x DIR_ENTER DIR_INCLUDE DIR_EXIT

/* These are not token expressions yet, just convenience expressions that
   can be used during actual token definitions. Note some can match
   incorrect inputs (e.g., IP addresses) which must be checked. */
int   \-?[0-9]+
blank [ \t\r]

UnicodeEscapeSequence           u[0-9A-Fa-f]{4}
JSONEscapeCharacter             ["\\/bfnrt]
JSONEscapeSequence              {JSONEscapeCharacter}|{UnicodeEscapeSequence}
JSONStandardCharacter           [^\x00-\x1f"\\]
JSONStringCharacter             {JSONStandardCharacter}|\\{JSONEscapeSequence}
JSONString                      \"{JSONStringCharacter}*\"

/* for errors */

BadUnicodeEscapeSequence        u[0-9A-Fa-f]{0,3}[^0-9A-Fa-f]
BadJSONEscapeSequence           [^"\\/bfnrtu]|{BadUnicodeEscapeSequence}
ControlCharacter                [\x00-\x1f]
ControlCharacterFill            [^"\\]|\\{JSONEscapeSequence}

%{
88 89 90
/* This code run each time a pattern is matched. It updates the location
   by moving it ahead by yyleng bytes. yyleng specifies the length of the
   currently matched token. */
91 92 93 94 95 96
#define YY_USER_ACTION  driver.loc_.columns(yyleng);
%}

%%

%{
97 98 99
    /* This part of the code is copied over to the verbatim to the top
       of the generated yylex function. Explanation:
       http://www.gnu.org/software/bison/manual/html_node/Multiple-start_002dsymbols.html */
100

101
    /* Code run each time yylex is called. */
102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145
    driver.loc_.step();

    if (start_token_flag) {
        start_token_flag = false;
        switch (start_token_value) {
        case D2ParserContext::PARSER_JSON:
        default:
            return isc::d2::D2Parser::make_TOPLEVEL_JSON(driver.loc_);
        case D2ParserContext::PARSER_DHCPDDNS:
            return isc::d2::D2Parser::make_TOPLEVEL_DHCPDDNS(driver.loc_);
        case D2ParserContext::PARSER_SUB_DHCPDDNS:
            return isc::d2::D2Parser::make_SUB_DHCPDDNS(driver.loc_);
        case D2ParserContext::PARSER_TSIG_KEY:
            return isc::d2::D2Parser::make_SUB_TSIG_KEY(driver.loc_);
        case D2ParserContext::PARSER_TSIG_KEYS:
            return isc::d2::D2Parser::make_SUB_TSIG_KEYS(driver.loc_);
        case D2ParserContext::PARSER_DDNS_DOMAIN:
            return isc::d2::D2Parser::make_SUB_DDNS_DOMAIN(driver.loc_);
        case D2ParserContext::PARSER_DDNS_DOMAINS:
            return isc::d2::D2Parser::make_SUB_DDNS_DOMAINS(driver.loc_);
        case D2ParserContext::PARSER_DNS_SERVER:
            return isc::d2::D2Parser::make_SUB_DNS_SERVER(driver.loc_);
        }
    }
%}

#.* ;

"//"(.*) ;

"/*" {
  BEGIN(COMMENT);
  comment_start_line = driver.loc_.end.line;;
}

<COMMENT>"*/" BEGIN(INITIAL);
<COMMENT>. ;
<COMMENT><<EOF>> {
    isc_throw(D2ParseError, "Comment not closed. (/* in line " << comment_start_line);
}

"<?" BEGIN(DIR_ENTER);
<DIR_ENTER>"include" BEGIN(DIR_INCLUDE);
<DIR_INCLUDE>\"([^\"\n])+\" {
146
    /* Include directive. */
147

148
    /* Extract the filename. */
149 150 151 152 153 154 155 156 157 158 159 160
    std::string tmp(yytext+1);
    tmp.resize(tmp.size() - 1);

    driver.includeFile(tmp);
}
<DIR_ENTER,DIR_INCLUDE,DIR_EXIT><<EOF>> {
    isc_throw(D2ParseError, "Directive not closed.");
}
<DIR_EXIT>"?>" BEGIN(INITIAL);


<*>{blank}+   {
161
    /* Ok, we found a with space. Let's ignore it and update loc variable. */
162 163 164 165
    driver.loc_.step();
}

<*>[\n]+      {
166
    /* Newline found. Let's update the location and continue. */
167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393
    driver.loc_.lines(yyleng);
    driver.loc_.step();
}

\"DhcpDdns\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::CONFIG:
        return isc::d2::D2Parser::make_DHCPDDNS(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("DhcpDdns", driver.loc_);
    }
}

\"ip-address\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::DHCPDDNS:
    case isc::d2::D2ParserContext::DNS_SERVER:
    case isc::d2::D2ParserContext::DNS_SERVERS:
        return isc::d2::D2Parser::make_IP_ADDRESS(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("ip-address", driver.loc_);
    }
}

\"port\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::DHCPDDNS:
    case isc::d2::D2ParserContext::DNS_SERVER:
    case isc::d2::D2ParserContext::DNS_SERVERS:
        return isc::d2::D2Parser::make_PORT(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("port", driver.loc_);
    }
}

\"dns-server-timeout\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::DHCPDDNS:
        return isc::d2::D2Parser::make_DNS_SERVER_TIMEOUT(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("dns-server-timeout", driver.loc_);
    }
}

\"ncr-protocol\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::DHCPDDNS:
        return isc::d2::D2Parser::make_NCR_PROTOCOL(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("ncr-protocol", driver.loc_);
    }
}

\"ncr-format\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::DHCPDDNS:
        return isc::d2::D2Parser::make_NCR_FORMAT(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("ncr-format", driver.loc_);
    }
}

(?i:\"UDP\") {
    /* dhcp-ddns value keywords are case insensitive */
    if (driver.ctx_ == isc::d2::D2ParserContext::NCR_PROTOCOL) {
        return isc::d2::D2Parser::make_UDP(driver.loc_);
    }
    std::string tmp(yytext+1);
    tmp.resize(tmp.size() - 1);
    return isc::d2::D2Parser::make_STRING(tmp, driver.loc_);
}

(?i:\"TCP\") {
    /* dhcp-ddns value keywords are case insensitive */
    if (driver.ctx_ == isc::d2::D2ParserContext::NCR_PROTOCOL) {
        return isc::d2::D2Parser::make_TCP(driver.loc_);
    }
    std::string tmp(yytext+1);
    tmp.resize(tmp.size() - 1);
    return isc::d2::D2Parser::make_STRING(tmp, driver.loc_);
}

(?i:\"JSON\") {
    /* dhcp-ddns value keywords are case insensitive */
    if (driver.ctx_ == isc::d2::D2ParserContext::NCR_FORMAT) {
        return isc::d2::D2Parser::make_JSON(driver.loc_);
    }
    std::string tmp(yytext+1);
    tmp.resize(tmp.size() - 1);
    return isc::d2::D2Parser::make_STRING(tmp, driver.loc_);
}

\"forward-ddns\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::DHCPDDNS:
        return isc::d2::D2Parser::make_FORWARD_DDNS(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("forward-ddns", driver.loc_);
    }
}

\"reverse-ddns\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::DHCPDDNS:
        return isc::d2::D2Parser::make_REVERSE_DDNS(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("reverse-ddns", driver.loc_);
    }
}

\"ddns-domains\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::FORWARD_DDNS:
    case isc::d2::D2ParserContext::REVERSE_DDNS:
        return isc::d2::D2Parser::make_DDNS_DOMAINS(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("ddns-domains", driver.loc_);
    }
}

\"key-name\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::DDNS_DOMAIN:
    case isc::d2::D2ParserContext::DDNS_DOMAINS:
        return isc::d2::D2Parser::make_KEY_NAME(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("key-name", driver.loc_);
    }
}

\"dns-servers\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::DDNS_DOMAIN:
    case isc::d2::D2ParserContext::DDNS_DOMAINS:
        return isc::d2::D2Parser::make_DNS_SERVERS(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("dns-servers", driver.loc_);
    }
}

\"hostname\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::DNS_SERVER:
    case isc::d2::D2ParserContext::DNS_SERVERS:
        return isc::d2::D2Parser::make_HOSTNAME(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("hostname", driver.loc_);
    }
}


\"tsig-keys\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::DHCPDDNS:
        return isc::d2::D2Parser::make_TSIG_KEYS(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("tsig-keys", driver.loc_);
    }
}

\"algorithm\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::TSIG_KEY:
    case isc::d2::D2ParserContext::TSIG_KEYS:
        return isc::d2::D2Parser::make_ALGORITHM(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("algorithm", driver.loc_);
    }
}

\"digest-bits\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::TSIG_KEY:
    case isc::d2::D2ParserContext::TSIG_KEYS:
        return isc::d2::D2Parser::make_DIGEST_BITS(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("digest-bits", driver.loc_);
    }
}

\"secret\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::TSIG_KEY:
    case isc::d2::D2ParserContext::TSIG_KEYS:
        return isc::d2::D2Parser::make_SECRET(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("secret", driver.loc_);
    }
}


\"Logging\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::CONFIG:
        return isc::d2::D2Parser::make_LOGGING(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("Logging", driver.loc_);
    }
}

\"loggers\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::LOGGING:
        return isc::d2::D2Parser::make_LOGGERS(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("loggers", driver.loc_);
    }
}

\"output_options\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::LOGGERS:
        return isc::d2::D2Parser::make_OUTPUT_OPTIONS(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("output_options", driver.loc_);
    }
}

\"output\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::OUTPUT_OPTIONS:
        return isc::d2::D2Parser::make_OUTPUT(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("output", driver.loc_);
    }
}

394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420
\"flush\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::OUTPUT_OPTIONS:
        return isc::d2::D2Parser::make_FLUSH(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("flush", driver.loc_);
    }
}

\"maxsize\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::OUTPUT_OPTIONS:
        return isc::d2::D2Parser::make_MAXSIZE(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("maxsize", driver.loc_);
    }
}

\"maxver\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::OUTPUT_OPTIONS:
        return isc::d2::D2Parser::make_MAXVER(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("maxver", driver.loc_);
    }
}

421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471
\"name\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::LOGGERS:
    case isc::d2::D2ParserContext::TSIG_KEY:
    case isc::d2::D2ParserContext::TSIG_KEYS:
    case isc::d2::D2ParserContext::DDNS_DOMAIN:
    case isc::d2::D2ParserContext::DDNS_DOMAINS:
        return isc::d2::D2Parser::make_NAME(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("name", driver.loc_);
    }
}

\"debuglevel\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::LOGGERS:
        return isc::d2::D2Parser::make_DEBUGLEVEL(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("debuglevel", driver.loc_);
    }
}

\"severity\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::LOGGERS:
        return isc::d2::D2Parser::make_SEVERITY(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("severity", driver.loc_);
    }
}

\"Dhcp4\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::CONFIG:
        return isc::d2::D2Parser::make_DHCP4(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("Dhcp4", driver.loc_);
    }
}

\"Dhcp6\" {
    switch(driver.ctx_) {
    case isc::d2::D2ParserContext::CONFIG:
        return isc::d2::D2Parser::make_DHCP6(driver.loc_);
    default:
        return isc::d2::D2Parser::make_STRING("Dhcp6", driver.loc_);
    }
}


{JSONString} {
472 473 474
    /* A string has been matched. It contains the actual string and single quotes.
       We need to get those quotes out of the way and just use its content, e.g.
       for 'foo' we should get foo */
475 476 477 478 479 480 481 482 483 484
    std::string raw(yytext+1);
    size_t len = raw.size() - 1;
    raw.resize(len);
    std::string decoded;
    decoded.reserve(len);
    for (size_t pos = 0; pos < len; ++pos) {
        int b = 0;
        char c = raw[pos];
        switch (c) {
        case '"':
485
            /* impossible condition */
486 487 488 489
            driver.error(driver.loc_, "Bad quote in \"" + raw + "\"");
        case '\\':
            ++pos;
            if (pos >= len) {
490
                /* impossible condition */
491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515
                driver.error(driver.loc_, "Overflow escape in \"" + raw + "\"");
            }
            c = raw[pos];
            switch (c) {
            case '"':
            case '\\':
            case '/':
                decoded.push_back(c);
                break;
            case 'b':
                decoded.push_back('\b');
                break;
            case 'f':
                decoded.push_back('\f');
                break;
            case 'n':
                decoded.push_back('\n');
                break;
            case 'r':
                decoded.push_back('\r');
                break;
            case 't':
                decoded.push_back('\t');
                break;
            case 'u':
516
                /* support only \u0000 to \u00ff */
517 518
                ++pos;
                if (pos + 4 > len) {
519
                    /* impossible condition */
520 521 522 523 524 525 526 527 528 529 530 531 532 533 534
                    driver.error(driver.loc_,
                                 "Overflow unicode escape in \"" + raw + "\"");
                }
                if ((raw[pos] != '0') || (raw[pos + 1] != '0')) {
                    driver.error(driver.loc_, "Unsupported unicode escape in \"" + raw + "\"");
                }
                pos += 2;
                c = raw[pos];
                if ((c >= '0') && (c <= '9')) {
                    b = (c - '0') << 4;
                } else if ((c >= 'A') && (c <= 'F')) {
                    b = (c - 'A' + 10) << 4;
                } else if ((c >= 'a') && (c <= 'f')) {
                    b = (c - 'a' + 10) << 4;
                } else {
535
                    /* impossible condition */
536 537 538 539 540 541 542 543 544 545 546
                    driver.error(driver.loc_, "Not hexadecimal in unicode escape in \"" + raw + "\"");
                }
                pos++;
                c = raw[pos];
                if ((c >= '0') && (c <= '9')) {
                    b |= c - '0';
                } else if ((c >= 'A') && (c <= 'F')) {
                    b |= c - 'A' + 10;
                } else if ((c >= 'a') && (c <= 'f')) {
                    b |= c - 'a' + 10;
                } else {
547
                    /* impossible condition */
548 549 550 551 552
                    driver.error(driver.loc_, "Not hexadecimal in unicode escape in \"" + raw + "\"");
                }
                decoded.push_back(static_cast<char>(b & 0xff));
                break;
            default:
553
                /* impossible condition */
554 555 556 557 558
                driver.error(driver.loc_, "Bad escape in \"" + raw + "\"");
            }
            break;
        default:
            if ((c >= 0) && (c < 0x20)) {
559
                /* impossible condition */
560 561 562 563 564 565 566 567 568 569
                driver.error(driver.loc_, "Invalid control in \"" + raw + "\"");
            }
            decoded.push_back(c);
        }
    }

    return isc::d2::D2Parser::make_STRING(decoded, driver.loc_);
}

\"{JSONStringCharacter}*{ControlCharacter}{ControlCharacterFill}*\" {
570
    /* Bad string with a forbidden control character inside */
571 572 573 574
    driver.error(driver.loc_, "Invalid control in " + std::string(yytext));
}

\"{JSONStringCharacter}*\\{BadJSONEscapeSequence}[^\x00-\x1f"]*\" {
575
    /* Bad string with a bad escape inside */
576 577 578 579
    driver.error(driver.loc_, "Bad escape in " + std::string(yytext));
}

\"{JSONStringCharacter}*\\\" {
580
    /* Bad string with an open escape at the end */
581 582 583 584 585 586 587 588 589 590 591
    driver.error(driver.loc_, "Overflow escape in " + std::string(yytext));
}

"["    { return isc::d2::D2Parser::make_LSQUARE_BRACKET(driver.loc_); }
"]"    { return isc::d2::D2Parser::make_RSQUARE_BRACKET(driver.loc_); }
"{"    { return isc::d2::D2Parser::make_LCURLY_BRACKET(driver.loc_); }
"}"    { return isc::d2::D2Parser::make_RCURLY_BRACKET(driver.loc_); }
","    { return isc::d2::D2Parser::make_COMMA(driver.loc_); }
":"    { return isc::d2::D2Parser::make_COLON(driver.loc_); }

{int} {
592
    /* An integer was found. */
593 594 595
    std::string tmp(yytext);
    int64_t integer = 0;
    try {
596 597 598 599
        /* In substring we want to use negative values (e.g. -1).
           In enterprise-id we need to use values up to 0xffffffff.
           To cover both of those use cases, we need at least
           int64_t. */
600 601 602 603 604
        integer = boost::lexical_cast<int64_t>(tmp);
    } catch (const boost::bad_lexical_cast &) {
        driver.error(driver.loc_, "Failed to convert " + tmp + " to an integer.");
    }

605
    /* The parser needs the string form as double conversion is no lossless */
606 607 608 609
    return isc::d2::D2Parser::make_INTEGER(integer, driver.loc_);
}

[-+]?[0-9]*\.?[0-9]*([eE][-+]?[0-9]+)? {
610
    /* A floating point was found. */
611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679
    std::string tmp(yytext);
    double fp = 0.0;
    try {
        fp = boost::lexical_cast<double>(tmp);
    } catch (const boost::bad_lexical_cast &) {
        driver.error(driver.loc_, "Failed to convert " + tmp + " to a floating point.");
    }

    return isc::d2::D2Parser::make_FLOAT(fp, driver.loc_);
}

true|false {
    string tmp(yytext);
    return isc::d2::D2Parser::make_BOOLEAN(tmp == "true", driver.loc_);
}

null {
   return isc::d2::D2Parser::make_NULL_TYPE(driver.loc_);
}

(?i:true) driver.error (driver.loc_, "JSON true reserved keyword is lower case only");

(?i:false) driver.error (driver.loc_, "JSON false reserved keyword is lower case only");

(?i:null) driver.error (driver.loc_, "JSON null reserved keyword is lower case only");

<*>.   driver.error (driver.loc_, "Invalid character: " + std::string(yytext));

<<EOF>> {
    if (driver.states_.empty()) {
        return isc::d2::D2Parser::make_END(driver.loc_);
    }
    driver.loc_ = driver.locs_.back();
    driver.locs_.pop_back();
    driver.file_ = driver.files_.back();
    driver.files_.pop_back();
    if (driver.sfile_) {
        fclose(driver.sfile_);
        driver.sfile_ = 0;
    }
    if (!driver.sfiles_.empty()) {
        driver.sfile_ = driver.sfiles_.back();
        driver.sfiles_.pop_back();
    }
    d2_parser__delete_buffer(YY_CURRENT_BUFFER);
    d2_parser__switch_to_buffer(driver.states_.back());
    driver.states_.pop_back();

    BEGIN(DIR_EXIT);
}

%%

using namespace isc::dhcp;

void
D2ParserContext::scanStringBegin(const std::string& str, ParserType parser_type)
{
    start_token_flag = true;
    start_token_value = parser_type;

    file_ = "<string>";
    sfile_ = 0;
    loc_.initialize(&file_);
    yy_flex_debug = trace_scanning_;
    YY_BUFFER_STATE buffer;
    buffer = d2_parser__scan_bytes(str.c_str(), str.size());
    if (!buffer) {
        fatal("cannot scan string");
680
        /* fatal() throws an exception so this can't be reached */
681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697
    }
}

void
D2ParserContext::scanFileBegin(FILE * f,
                              const std::string& filename,
                              ParserType parser_type)
{
    start_token_flag = true;
    start_token_value = parser_type;

    file_ = filename;
    sfile_ = f;
    loc_.initialize(&file_);
    yy_flex_debug = trace_scanning_;
    YY_BUFFER_STATE buffer;

698
    /* See d2_lexer.cc header for available definitions */
699 700 701 702 703 704 705 706 707 708 709 710 711
    buffer = d2_parser__create_buffer(f, 65536 /*buffer size*/);
    if (!buffer) {
        fatal("cannot scan file " + filename);
    }
    d2_parser__switch_to_buffer(buffer);
}

void
D2ParserContext::scanEnd() {
    if (sfile_)
        fclose(sfile_);
    sfile_ = 0;
    static_cast<void>(d2_parser_lex_destroy());
712
    /* Close files */
713 714 715 716 717 718 719
    while (!sfiles_.empty()) {
        FILE* f = sfiles_.back();
        if (f) {
            fclose(f);
        }
        sfiles_.pop_back();
    }
720
    /* Delete states */
721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756
    while (!states_.empty()) {
        d2_parser__delete_buffer(states_.back());
        states_.pop_back();
    }
}

void
D2ParserContext::includeFile(const std::string& filename) {
    if (states_.size() > 10) {
        fatal("Too many nested include.");
    }

    FILE* f = fopen(filename.c_str(), "r");
    if (!f) {
        fatal("Can't open include file " + filename);
    }
    if (sfile_) {
        sfiles_.push_back(sfile_);
    }
    sfile_ = f;
    states_.push_back(YY_CURRENT_BUFFER);
    YY_BUFFER_STATE buffer;
    buffer = d2_parser__create_buffer(f, 65536 /*buffer size*/);
    if (!buffer) {
        fatal( "Can't scan include file " + filename);
    }
    d2_parser__switch_to_buffer(buffer);
    files_.push_back(file_);
    file_ = filename;
    locs_.push_back(loc_);
    loc_.initialize(&file_);

    BEGIN(INITIAL);
}

namespace {
757
/** To avoid unused function error */
758
class Dummy {
759
    /* cppcheck-suppress unusedPrivateFunction */
760 761 762
    void dummy() { yy_fatal_error("Fix me: how to disable its definition?"); }
};
}