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960 lines
21 KiB
Plaintext
960 lines
21 KiB
Plaintext
%{/* nlmheader.y - parse NLM header specification keywords.
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Copyright (C) 1993-2015 Free Software Foundation, Inc.
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This file is part of GNU Binutils.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/* Written by Ian Lance Taylor <ian@cygnus.com>.
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This bison file parses the commands recognized by the NetWare NLM
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linker, except for lists of object files. It stores the
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information in global variables.
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This implementation is based on the description in the NetWare Tool
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Maker Specification manual, edition 1.0. */
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#include "sysdep.h"
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#include "safe-ctype.h"
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#include "bfd.h"
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#include "nlm/common.h"
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#include "nlm/internal.h"
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#include "bucomm.h"
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#include "nlmconv.h"
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/* Information is stored in the structures pointed to by these
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variables. */
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Nlm_Internal_Fixed_Header *fixed_hdr;
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Nlm_Internal_Variable_Header *var_hdr;
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Nlm_Internal_Version_Header *version_hdr;
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Nlm_Internal_Copyright_Header *copyright_hdr;
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Nlm_Internal_Extended_Header *extended_hdr;
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/* Procedure named by CHECK. */
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char *check_procedure;
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/* File named by CUSTOM. */
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char *custom_file;
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/* Whether to generate debugging information (DEBUG). */
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bfd_boolean debug_info;
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/* Procedure named by EXIT. */
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char *exit_procedure;
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/* Exported symbols (EXPORT). */
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struct string_list *export_symbols;
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/* List of files from INPUT. */
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struct string_list *input_files;
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/* Map file name (MAP, FULLMAP). */
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char *map_file;
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/* Whether a full map has been requested (FULLMAP). */
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bfd_boolean full_map;
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/* File named by HELP. */
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char *help_file;
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/* Imported symbols (IMPORT). */
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struct string_list *import_symbols;
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/* File named by MESSAGES. */
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char *message_file;
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/* Autoload module list (MODULE). */
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struct string_list *modules;
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/* File named by OUTPUT. */
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char *output_file;
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/* File named by SHARELIB. */
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char *sharelib_file;
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/* Start procedure name (START). */
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char *start_procedure;
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/* VERBOSE. */
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bfd_boolean verbose;
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/* RPC description file (XDCDATA). */
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char *rpc_file;
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/* The number of serious errors that have occurred. */
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int parse_errors;
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/* The current symbol prefix when reading a list of import or export
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symbols. */
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static char *symbol_prefix;
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/* Parser error message handler. */
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#define yyerror(msg) nlmheader_error (msg);
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/* Local functions. */
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static int yylex (void);
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static void nlmlex_file_push (const char *);
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static bfd_boolean nlmlex_file_open (const char *);
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static int nlmlex_buf_init (void);
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static char nlmlex_buf_add (int);
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static long nlmlex_get_number (const char *);
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static void nlmheader_identify (void);
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static void nlmheader_warn (const char *, int);
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static void nlmheader_error (const char *);
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static struct string_list * string_list_cons (char *, struct string_list *);
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static struct string_list * string_list_append (struct string_list *,
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struct string_list *);
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static struct string_list * string_list_append1 (struct string_list *,
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char *);
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static char *xstrdup (const char *);
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%}
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%union
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{
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char *string;
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struct string_list *list;
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};
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/* The reserved words. */
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%token CHECK CODESTART COPYRIGHT CUSTOM DATE DEBUG_K DESCRIPTION EXIT
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%token EXPORT FLAG_ON FLAG_OFF FULLMAP HELP IMPORT INPUT MAP MESSAGES
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%token MODULE MULTIPLE OS_DOMAIN OUTPUT PSEUDOPREEMPTION REENTRANT
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%token SCREENNAME SHARELIB STACK START SYNCHRONIZE
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%token THREADNAME TYPE VERBOSE VERSIONK XDCDATA
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/* Arguments. */
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%token <string> STRING
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%token <string> QUOTED_STRING
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/* Typed non-terminals. */
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%type <list> symbol_list_opt symbol_list string_list
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%type <string> symbol
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%%
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/* Keywords must start in the leftmost column of the file. Arguments
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may appear anywhere else. The lexer uses this to determine what
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token to return, so we don't have to worry about it here. */
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/* The entire file is just a list of commands. */
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file:
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commands
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;
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/* A possibly empty list of commands. */
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commands:
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/* May be empty. */
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| command commands
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;
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/* A single command. There is where most of the work takes place. */
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command:
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CHECK STRING
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{
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check_procedure = $2;
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}
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| CODESTART STRING
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{
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nlmheader_warn (_("CODESTART is not implemented; sorry"), -1);
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free ($2);
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}
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| COPYRIGHT QUOTED_STRING
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{
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int len;
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strncpy (copyright_hdr->stamp, "CoPyRiGhT=", 10);
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len = strlen ($2);
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if (len >= NLM_MAX_COPYRIGHT_MESSAGE_LENGTH)
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{
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nlmheader_warn (_("copyright string is too long"),
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NLM_MAX_COPYRIGHT_MESSAGE_LENGTH - 1);
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len = NLM_MAX_COPYRIGHT_MESSAGE_LENGTH - 1;
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}
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copyright_hdr->copyrightMessageLength = len;
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strncpy (copyright_hdr->copyrightMessage, $2, len);
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copyright_hdr->copyrightMessage[len] = '\0';
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free ($2);
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}
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| CUSTOM STRING
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{
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custom_file = $2;
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}
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| DATE STRING STRING STRING
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{
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/* We don't set the version stamp here, because we use the
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version stamp to detect whether the required VERSION
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keyword was given. */
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version_hdr->month = nlmlex_get_number ($2);
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version_hdr->day = nlmlex_get_number ($3);
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version_hdr->year = nlmlex_get_number ($4);
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free ($2);
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free ($3);
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free ($4);
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if (version_hdr->month < 1 || version_hdr->month > 12)
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nlmheader_warn (_("illegal month"), -1);
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if (version_hdr->day < 1 || version_hdr->day > 31)
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nlmheader_warn (_("illegal day"), -1);
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if (version_hdr->year < 1900 || version_hdr->year > 3000)
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nlmheader_warn (_("illegal year"), -1);
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}
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| DEBUG_K
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{
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debug_info = TRUE;
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}
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| DESCRIPTION QUOTED_STRING
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{
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int len;
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len = strlen ($2);
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if (len > NLM_MAX_DESCRIPTION_LENGTH)
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{
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nlmheader_warn (_("description string is too long"),
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NLM_MAX_DESCRIPTION_LENGTH);
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len = NLM_MAX_DESCRIPTION_LENGTH;
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}
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var_hdr->descriptionLength = len;
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strncpy (var_hdr->descriptionText, $2, len);
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var_hdr->descriptionText[len] = '\0';
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free ($2);
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}
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| EXIT STRING
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{
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exit_procedure = $2;
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}
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| EXPORT
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{
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symbol_prefix = NULL;
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}
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symbol_list_opt
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{
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export_symbols = string_list_append (export_symbols, $3);
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}
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| FLAG_ON STRING
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{
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fixed_hdr->flags |= nlmlex_get_number ($2);
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free ($2);
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}
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| FLAG_OFF STRING
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{
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fixed_hdr->flags &=~ nlmlex_get_number ($2);
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free ($2);
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}
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| FULLMAP
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{
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map_file = "";
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full_map = TRUE;
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}
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| FULLMAP STRING
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{
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map_file = $2;
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full_map = TRUE;
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}
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| HELP STRING
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{
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help_file = $2;
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}
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| IMPORT
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{
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symbol_prefix = NULL;
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}
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symbol_list_opt
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{
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import_symbols = string_list_append (import_symbols, $3);
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}
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| INPUT string_list
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{
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input_files = string_list_append (input_files, $2);
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}
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| MAP
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{
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map_file = "";
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}
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| MAP STRING
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{
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map_file = $2;
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}
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| MESSAGES STRING
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{
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message_file = $2;
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}
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| MODULE string_list
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{
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modules = string_list_append (modules, $2);
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}
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| MULTIPLE
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{
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fixed_hdr->flags |= 0x2;
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}
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| OS_DOMAIN
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{
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fixed_hdr->flags |= 0x10;
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}
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| OUTPUT STRING
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{
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if (output_file == NULL)
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output_file = $2;
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else
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nlmheader_warn (_("ignoring duplicate OUTPUT statement"), -1);
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}
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| PSEUDOPREEMPTION
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{
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fixed_hdr->flags |= 0x8;
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}
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| REENTRANT
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{
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fixed_hdr->flags |= 0x1;
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}
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| SCREENNAME QUOTED_STRING
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{
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int len;
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len = strlen ($2);
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if (len >= NLM_MAX_SCREEN_NAME_LENGTH)
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{
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nlmheader_warn (_("screen name is too long"),
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NLM_MAX_SCREEN_NAME_LENGTH);
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len = NLM_MAX_SCREEN_NAME_LENGTH;
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}
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var_hdr->screenNameLength = len;
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strncpy (var_hdr->screenName, $2, len);
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var_hdr->screenName[NLM_MAX_SCREEN_NAME_LENGTH] = '\0';
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free ($2);
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}
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| SHARELIB STRING
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{
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sharelib_file = $2;
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}
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| STACK STRING
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{
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var_hdr->stackSize = nlmlex_get_number ($2);
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free ($2);
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}
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| START STRING
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{
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start_procedure = $2;
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}
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| SYNCHRONIZE
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{
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fixed_hdr->flags |= 0x4;
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}
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| THREADNAME QUOTED_STRING
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{
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int len;
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len = strlen ($2);
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if (len >= NLM_MAX_THREAD_NAME_LENGTH)
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{
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nlmheader_warn (_("thread name is too long"),
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NLM_MAX_THREAD_NAME_LENGTH);
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len = NLM_MAX_THREAD_NAME_LENGTH;
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}
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var_hdr->threadNameLength = len;
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strncpy (var_hdr->threadName, $2, len);
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var_hdr->threadName[len] = '\0';
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free ($2);
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}
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| TYPE STRING
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{
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fixed_hdr->moduleType = nlmlex_get_number ($2);
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free ($2);
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}
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| VERBOSE
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{
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verbose = TRUE;
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}
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| VERSIONK STRING STRING STRING
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{
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long val;
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strncpy (version_hdr->stamp, "VeRsIoN#", 8);
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version_hdr->majorVersion = nlmlex_get_number ($2);
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val = nlmlex_get_number ($3);
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if (val < 0 || val > 99)
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nlmheader_warn (_("illegal minor version number (must be between 0 and 99)"),
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-1);
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else
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version_hdr->minorVersion = val;
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val = nlmlex_get_number ($4);
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if (val < 0)
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nlmheader_warn (_("illegal revision number (must be between 0 and 26)"),
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-1);
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else if (val > 26)
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version_hdr->revision = 0;
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else
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version_hdr->revision = val;
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free ($2);
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free ($3);
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free ($4);
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}
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| VERSIONK STRING STRING
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{
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long val;
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strncpy (version_hdr->stamp, "VeRsIoN#", 8);
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version_hdr->majorVersion = nlmlex_get_number ($2);
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val = nlmlex_get_number ($3);
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if (val < 0 || val > 99)
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nlmheader_warn (_("illegal minor version number (must be between 0 and 99)"),
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-1);
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else
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version_hdr->minorVersion = val;
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version_hdr->revision = 0;
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free ($2);
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free ($3);
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}
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| XDCDATA STRING
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{
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rpc_file = $2;
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}
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;
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/* A possibly empty list of symbols. */
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symbol_list_opt:
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/* Empty. */
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{
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$$ = NULL;
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}
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| symbol_list
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{
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$$ = $1;
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}
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;
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/* A list of symbols in an import or export list. Prefixes may appear
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in parentheses. We need to use left recursion here to avoid
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building up a large import list on the parser stack. */
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symbol_list:
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symbol
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{
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$$ = string_list_cons ($1, NULL);
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}
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| symbol_prefix
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{
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$$ = NULL;
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}
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| symbol_list symbol
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{
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$$ = string_list_append1 ($1, $2);
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}
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| symbol_list symbol_prefix
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{
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$$ = $1;
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}
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;
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/* A prefix for subsequent symbols. */
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symbol_prefix:
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'(' STRING ')'
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{
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if (symbol_prefix != NULL)
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free (symbol_prefix);
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symbol_prefix = $2;
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}
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;
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/* A single symbol. */
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symbol:
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STRING
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{
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if (symbol_prefix == NULL)
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$$ = $1;
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else
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{
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$$ = xmalloc (strlen (symbol_prefix) + strlen ($1) + 2);
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sprintf ($$, "%s@%s", symbol_prefix, $1);
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free ($1);
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}
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}
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;
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/* A list of strings. */
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string_list:
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/* May be empty. */
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{
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$$ = NULL;
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}
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| STRING string_list
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{
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$$ = string_list_cons ($1, $2);
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}
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;
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%%
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/* If strerror is just a macro, we want to use the one from libiberty
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since it will handle undefined values. */
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#undef strerror
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extern char *strerror (int);
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/* The lexer is simple, too simple for flex. Keywords are only
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recognized at the start of lines. Everything else must be an
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argument. A comma is treated as whitespace. */
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/* The states the lexer can be in. */
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enum lex_state
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{
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/* At the beginning of a line. */
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BEGINNING_OF_LINE,
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/* In the middle of a line. */
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IN_LINE
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};
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/* We need to keep a stack of files to handle file inclusion. */
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struct input
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{
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/* The file to read from. */
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FILE *file;
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/* The name of the file. */
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char *name;
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/* The current line number. */
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int lineno;
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/* The current state. */
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enum lex_state state;
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/* The next file on the stack. */
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struct input *next;
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};
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/* The current input file. */
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static struct input current;
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/* The character which introduces comments. */
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#define COMMENT_CHAR '#'
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/* Start the lexer going on the main input file. */
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bfd_boolean
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nlmlex_file (const char *name)
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{
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current.next = NULL;
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return nlmlex_file_open (name);
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}
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/* Start the lexer going on a subsidiary input file. */
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static void
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nlmlex_file_push (const char *name)
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{
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struct input *push;
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push = (struct input *) xmalloc (sizeof (struct input));
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*push = current;
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if (nlmlex_file_open (name))
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current.next = push;
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else
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{
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current = *push;
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free (push);
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}
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}
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/* Start lexing from a file. */
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static bfd_boolean
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nlmlex_file_open (const char *name)
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{
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current.file = fopen (name, "r");
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if (current.file == NULL)
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{
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fprintf (stderr, "%s:%s: %s\n", program_name, name, strerror (errno));
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++parse_errors;
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return FALSE;
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}
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current.name = xstrdup (name);
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current.lineno = 1;
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current.state = BEGINNING_OF_LINE;
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return TRUE;
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}
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/* Table used to turn keywords into tokens. */
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struct keyword_tokens_struct
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{
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const char *keyword;
|
||
int token;
|
||
};
|
||
|
||
static struct keyword_tokens_struct keyword_tokens[] =
|
||
{
|
||
{ "CHECK", CHECK },
|
||
{ "CODESTART", CODESTART },
|
||
{ "COPYRIGHT", COPYRIGHT },
|
||
{ "CUSTOM", CUSTOM },
|
||
{ "DATE", DATE },
|
||
{ "DEBUG", DEBUG_K },
|
||
{ "DESCRIPTION", DESCRIPTION },
|
||
{ "EXIT", EXIT },
|
||
{ "EXPORT", EXPORT },
|
||
{ "FLAG_ON", FLAG_ON },
|
||
{ "FLAG_OFF", FLAG_OFF },
|
||
{ "FULLMAP", FULLMAP },
|
||
{ "HELP", HELP },
|
||
{ "IMPORT", IMPORT },
|
||
{ "INPUT", INPUT },
|
||
{ "MAP", MAP },
|
||
{ "MESSAGES", MESSAGES },
|
||
{ "MODULE", MODULE },
|
||
{ "MULTIPLE", MULTIPLE },
|
||
{ "OS_DOMAIN", OS_DOMAIN },
|
||
{ "OUTPUT", OUTPUT },
|
||
{ "PSEUDOPREEMPTION", PSEUDOPREEMPTION },
|
||
{ "REENTRANT", REENTRANT },
|
||
{ "SCREENNAME", SCREENNAME },
|
||
{ "SHARELIB", SHARELIB },
|
||
{ "STACK", STACK },
|
||
{ "STACKSIZE", STACK },
|
||
{ "START", START },
|
||
{ "SYNCHRONIZE", SYNCHRONIZE },
|
||
{ "THREADNAME", THREADNAME },
|
||
{ "TYPE", TYPE },
|
||
{ "VERBOSE", VERBOSE },
|
||
{ "VERSION", VERSIONK },
|
||
{ "XDCDATA", XDCDATA }
|
||
};
|
||
|
||
#define KEYWORD_COUNT (sizeof (keyword_tokens) / sizeof (keyword_tokens[0]))
|
||
|
||
/* The lexer accumulates strings in these variables. */
|
||
static char *lex_buf;
|
||
static int lex_size;
|
||
static int lex_pos;
|
||
|
||
/* Start accumulating strings into the buffer. */
|
||
#define BUF_INIT() \
|
||
((void) (lex_buf != NULL ? lex_pos = 0 : nlmlex_buf_init ()))
|
||
|
||
static int
|
||
nlmlex_buf_init (void)
|
||
{
|
||
lex_size = 10;
|
||
lex_buf = xmalloc (lex_size + 1);
|
||
lex_pos = 0;
|
||
return 0;
|
||
}
|
||
|
||
/* Finish a string in the buffer. */
|
||
#define BUF_FINISH() ((void) (lex_buf[lex_pos] = '\0'))
|
||
|
||
/* Accumulate a character into the buffer. */
|
||
#define BUF_ADD(c) \
|
||
((void) (lex_pos < lex_size \
|
||
? lex_buf[lex_pos++] = (c) \
|
||
: nlmlex_buf_add (c)))
|
||
|
||
static char
|
||
nlmlex_buf_add (int c)
|
||
{
|
||
if (lex_pos >= lex_size)
|
||
{
|
||
lex_size *= 2;
|
||
lex_buf = xrealloc (lex_buf, lex_size + 1);
|
||
}
|
||
|
||
return lex_buf[lex_pos++] = c;
|
||
}
|
||
|
||
/* The lexer proper. This is called by the bison generated parsing
|
||
code. */
|
||
|
||
static int
|
||
yylex (void)
|
||
{
|
||
int c;
|
||
|
||
tail_recurse:
|
||
|
||
c = getc (current.file);
|
||
|
||
/* Commas are treated as whitespace characters. */
|
||
while (ISSPACE (c) || c == ',')
|
||
{
|
||
current.state = IN_LINE;
|
||
if (c == '\n')
|
||
{
|
||
++current.lineno;
|
||
current.state = BEGINNING_OF_LINE;
|
||
}
|
||
c = getc (current.file);
|
||
}
|
||
|
||
/* At the end of the file we either pop to the previous file or
|
||
finish up. */
|
||
if (c == EOF)
|
||
{
|
||
fclose (current.file);
|
||
free (current.name);
|
||
if (current.next == NULL)
|
||
return 0;
|
||
else
|
||
{
|
||
struct input *next;
|
||
|
||
next = current.next;
|
||
current = *next;
|
||
free (next);
|
||
goto tail_recurse;
|
||
}
|
||
}
|
||
|
||
/* A comment character always means to drop everything until the
|
||
next newline. */
|
||
if (c == COMMENT_CHAR)
|
||
{
|
||
do
|
||
{
|
||
c = getc (current.file);
|
||
}
|
||
while (c != '\n');
|
||
++current.lineno;
|
||
current.state = BEGINNING_OF_LINE;
|
||
goto tail_recurse;
|
||
}
|
||
|
||
/* An '@' introduces an include file. */
|
||
if (c == '@')
|
||
{
|
||
do
|
||
{
|
||
c = getc (current.file);
|
||
if (c == '\n')
|
||
++current.lineno;
|
||
}
|
||
while (ISSPACE (c));
|
||
BUF_INIT ();
|
||
while (! ISSPACE (c) && c != EOF)
|
||
{
|
||
BUF_ADD (c);
|
||
c = getc (current.file);
|
||
}
|
||
BUF_FINISH ();
|
||
|
||
ungetc (c, current.file);
|
||
|
||
nlmlex_file_push (lex_buf);
|
||
goto tail_recurse;
|
||
}
|
||
|
||
/* A non-space character at the start of a line must be the start of
|
||
a keyword. */
|
||
if (current.state == BEGINNING_OF_LINE)
|
||
{
|
||
BUF_INIT ();
|
||
while (ISALNUM (c) || c == '_')
|
||
{
|
||
BUF_ADD (TOUPPER (c));
|
||
c = getc (current.file);
|
||
}
|
||
BUF_FINISH ();
|
||
|
||
if (c != EOF && ! ISSPACE (c) && c != ',')
|
||
{
|
||
nlmheader_identify ();
|
||
fprintf (stderr, _("%s:%d: illegal character in keyword: %c\n"),
|
||
current.name, current.lineno, c);
|
||
}
|
||
else
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0; i < KEYWORD_COUNT; i++)
|
||
{
|
||
if (lex_buf[0] == keyword_tokens[i].keyword[0]
|
||
&& strcmp (lex_buf, keyword_tokens[i].keyword) == 0)
|
||
{
|
||
/* Pushing back the final whitespace avoids worrying
|
||
about \n here. */
|
||
ungetc (c, current.file);
|
||
current.state = IN_LINE;
|
||
return keyword_tokens[i].token;
|
||
}
|
||
}
|
||
|
||
nlmheader_identify ();
|
||
fprintf (stderr, _("%s:%d: unrecognized keyword: %s\n"),
|
||
current.name, current.lineno, lex_buf);
|
||
}
|
||
|
||
++parse_errors;
|
||
/* Treat the rest of this line as a comment. */
|
||
ungetc (COMMENT_CHAR, current.file);
|
||
goto tail_recurse;
|
||
}
|
||
|
||
/* Parentheses just represent themselves. */
|
||
if (c == '(' || c == ')')
|
||
return c;
|
||
|
||
/* Handle quoted strings. */
|
||
if (c == '"' || c == '\'')
|
||
{
|
||
int quote;
|
||
int start_lineno;
|
||
|
||
quote = c;
|
||
start_lineno = current.lineno;
|
||
|
||
c = getc (current.file);
|
||
BUF_INIT ();
|
||
while (c != quote && c != EOF)
|
||
{
|
||
BUF_ADD (c);
|
||
if (c == '\n')
|
||
++current.lineno;
|
||
c = getc (current.file);
|
||
}
|
||
BUF_FINISH ();
|
||
|
||
if (c == EOF)
|
||
{
|
||
nlmheader_identify ();
|
||
fprintf (stderr, _("%s:%d: end of file in quoted string\n"),
|
||
current.name, start_lineno);
|
||
++parse_errors;
|
||
}
|
||
|
||
/* FIXME: Possible memory leak. */
|
||
yylval.string = xstrdup (lex_buf);
|
||
return QUOTED_STRING;
|
||
}
|
||
|
||
/* Gather a generic argument. */
|
||
BUF_INIT ();
|
||
while (! ISSPACE (c)
|
||
&& c != ','
|
||
&& c != COMMENT_CHAR
|
||
&& c != '('
|
||
&& c != ')')
|
||
{
|
||
BUF_ADD (c);
|
||
c = getc (current.file);
|
||
}
|
||
BUF_FINISH ();
|
||
|
||
ungetc (c, current.file);
|
||
|
||
/* FIXME: Possible memory leak. */
|
||
yylval.string = xstrdup (lex_buf);
|
||
return STRING;
|
||
}
|
||
|
||
/* Get a number from a string. */
|
||
|
||
static long
|
||
nlmlex_get_number (const char *s)
|
||
{
|
||
long ret;
|
||
char *send;
|
||
|
||
ret = strtol (s, &send, 10);
|
||
if (*send != '\0')
|
||
nlmheader_warn (_("bad number"), -1);
|
||
return ret;
|
||
}
|
||
|
||
/* Prefix the nlmconv warnings with a note as to where they come from.
|
||
We don't use program_name on every warning, because then some
|
||
versions of the emacs next-error function can't recognize the line
|
||
number. */
|
||
|
||
static void
|
||
nlmheader_identify (void)
|
||
{
|
||
static int done;
|
||
|
||
if (! done)
|
||
{
|
||
fprintf (stderr, _("%s: problems in NLM command language input:\n"),
|
||
program_name);
|
||
done = 1;
|
||
}
|
||
}
|
||
|
||
/* Issue a warning. */
|
||
|
||
static void
|
||
nlmheader_warn (const char *s, int imax)
|
||
{
|
||
nlmheader_identify ();
|
||
fprintf (stderr, "%s:%d: %s", current.name, current.lineno, s);
|
||
if (imax != -1)
|
||
fprintf (stderr, " (max %d)", imax);
|
||
fprintf (stderr, "\n");
|
||
}
|
||
|
||
/* Report an error. */
|
||
|
||
static void
|
||
nlmheader_error (const char *s)
|
||
{
|
||
nlmheader_warn (s, -1);
|
||
++parse_errors;
|
||
}
|
||
|
||
/* Add a string to a string list. */
|
||
|
||
static struct string_list *
|
||
string_list_cons (char *s, struct string_list *l)
|
||
{
|
||
struct string_list *ret;
|
||
|
||
ret = (struct string_list *) xmalloc (sizeof (struct string_list));
|
||
ret->next = l;
|
||
ret->string = s;
|
||
return ret;
|
||
}
|
||
|
||
/* Append a string list to another string list. */
|
||
|
||
static struct string_list *
|
||
string_list_append (struct string_list *l1, struct string_list *l2)
|
||
{
|
||
register struct string_list **pp;
|
||
|
||
for (pp = &l1; *pp != NULL; pp = &(*pp)->next)
|
||
;
|
||
*pp = l2;
|
||
return l1;
|
||
}
|
||
|
||
/* Append a string to a string list. */
|
||
|
||
static struct string_list *
|
||
string_list_append1 (struct string_list *l, char *s)
|
||
{
|
||
struct string_list *n;
|
||
register struct string_list **pp;
|
||
|
||
n = (struct string_list *) xmalloc (sizeof (struct string_list));
|
||
n->next = NULL;
|
||
n->string = s;
|
||
for (pp = &l; *pp != NULL; pp = &(*pp)->next)
|
||
;
|
||
*pp = n;
|
||
return l;
|
||
}
|
||
|
||
/* Duplicate a string in memory. */
|
||
|
||
static char *
|
||
xstrdup (const char *s)
|
||
{
|
||
unsigned long len;
|
||
char *ret;
|
||
|
||
len = strlen (s);
|
||
ret = xmalloc (len + 1);
|
||
strcpy (ret, s);
|
||
return ret;
|
||
}
|