source: git/src/message.c @ a3e49dc

/* message.c */

/* ERRC show diffs to newer version of error.c - most that are left in here aren't relevant */

/* loosely based on Survex's error.c, but uses SGML entities for accented
 * characters, and is rather more generic */

/* maps: */

/* (perfect hash) entity name to &#nnn; code */

/* (lookup table or switch) &#nnn; code to best rendition in each charset */


/* filename.c split off with filename manipulation stuff */


/* > error.c
 * Fairly general purpose error routines and path handling code
 * Copyright (C) 1993-1997 Olly Betts
 */

/*
1993.01.25 PC Compatibility OKed
1993.01.27 print newline before error messages
1993.02.17 changed #ifdef RISCOS to #if OS==...
1993.02.19 now look for ErrList in dir main exec was in
           for PC ERRLIST -> ERRLIST.TXT
1993.02.23 now do exit(EXIT_FAILURE) or exit(EXIT_SUCCESS)
           added guessed UNIX stuff
1993.03.12 Major recode to make it less crap. Especially:
           Now copes with *any* undefined message number
           Error file now has spaces, not underscores
1993.03.16 Merged 'PathCode.c' with this file. Updates for 'PathCode.c' were:
>> 1993.02.19 written
>> 1993.02.23 added guess at UNIX code
>> 1993.02.24 (W) add (int) cast to suppress warning calculating lenpth
>> 1993.02.25 Don't look for FNM_SEP_DRV if it's not defined
1993.03.18 Added LfFromFnm()
1993.03.19 Corrected bug which caused infinite loop for PC text error file
1993.04.06 slight fettles and copied fn headers to error.c
1993.04.07 Added UsePth()
           #error Don't ... -> #error Do not ... for GCC's happiness
1993.04.22 added fopenWithPthAndExt()
           added application name code
1993.04.25 added AMIGA version
1993.05.05 Slightly more elegant hack than Wook's to solve BC++ stderr bug
1993.05.12 (W) added FNTYPE for different DOS memory model proofing (non-ANSI)
1993.05.22 (W) removed stderr hack as it is not that simple???
               improved 'error file not found' reporting
1993.05.27 removed commented out #define STDERR ...
           actually improved 'error file not found' et al - personally I do
            *not* regard caverot telling me 'SURVEX: <error message>' as an
            improvement. Mind you, I'm fussy.
1993.05.28 added signal catching code
1993.05.29 errno printed when signal received
1993.06.04 moved #define FNM_SEP_XXX to filelist.h
           added #ifdef SIGSTAK as unix GCC doesn't seem to have it
1993.06.05 removed 'superfluous' &'s in signal fns
           signal catcher now uses strerror()
1993.06.07 Unix libraries don't have strerror() - so don't use it!
           FNTYPE -> FAR to aid comprehension
1993.06.10 in report_sig() only print out errno if non-zero
1993.06.12 fixed bug in path&ext code: only added .ext when prepending path
1993.06.16 syserr() -> fatal(); osmalloc() added; char* -> sz
           osrealloc() added; osfree() comment added
1993.06.28 fixed bug which lost first character of each error message on
            big-endian machines
           fixed fopenWithPthAndExt() to osfree() fnmFull
1993.07.19 "common.h" -> "osdepend.h"
1993.07.27 changed "error number %d" to "#%d" in output
1993.08.10 added '\n' before errors reported in report_sig
1993.08.12 added more bomb-proofing
1993.08.13 fettled header
1993.08.16 added fAbsoluteFnm & fAmbiguousFnm; recoded fopenWithPthAndExt
           RISC OS version of fopenWithPthAndExt copes with "<My$Dir>.File"
           added AddExt; added pfExtUsed arg to fopenWithPthAndExt
1993.08.19 ./ in DOS is ambiguous, not absolute
1993.09.21 (W)fixed relative paths without preceding .\ for .svc files
           (W)changed DOS fAbsolute() so 'c:here' is returned as ambiguous
1993.09.22 (W)changed error functions for more general info line
           (W)added function list
1993.09.23 (IH)DOS uses farmalloc,farrealloc,farfree; osmalloc() takes a long
1993.10.15 (BP)changed erroneous ifdef MSDOS's to if (OS==MSDOS)
1993.10.18 (W)fWarningGiven added
1993.10.23 corrected fFALSE to fFalse
1993.11.03 changed error routines
           cWarnings rather than fWarningGiven
           fettled a bit
1993.11.05 OSSIZE_T added
           fixed problem with pth=="" in fopenWithPthAndExt
           added msg() and msgPerm()
1993.11.07 merged out of memory code from osmalloc & osrealloc
1993.11.08 added code to deal with quoted messages
1993.11.14 fettled
1993.11.15 added xosmalloc (returns NULL if malloc fails)
1993.11.18 xosrealloc added as macro in error.h
           added calls to fDirectory
1993.11.19 added TeX style escape sequences for accents; also ``,'' for "
1993.11.20 minor change to '' and `` code
           \/O & \/o now used for slashed Os
           extracted tables to tex.h
1993.11.26 moved chOpenQuotes & chCloseQuotes to tex.h
1993.11.28 added NO_TEX to turn it off for now
1993.11.29 (IH) void * FAR -> void FAR * ; void * FILE -> void FILE *
           use perror in UNIX version
           extracted messages from here too! (except for signal ones)
1993.11.30 corrected Wook's ungroks in function list
           error now returns (it was wrong, but limp on); use fatal to abort
           added cErrors
1993.12.01 added error_summary()
           most signals tell the user to report them as a bug (autograss?)
           check version of messages.txt file
1993.12.08 split off osdepend.c
1993.12.09 now makes less explicit reference to OS
1993.12.16 farmalloc use controlled by NO_FLATDOS macro
           fixed error bootstrap code problem-ette
1993.12.17 wr changed to send to stderr as it writes error info
1994.01.05 added missing FAR to fix >128 eqns bug
           and another
           bug-fixed in outofmem
1994.03.13 enabled TeX style characters
           will deal with `` and '' even if NO_TEX is defined
1994.03.14 altered fopenWithPthAndExt to give filename actually used
1994.03.19 signals now reported as `fatal error' since they are
           all error output to do with signals is now sent to stderr
1994.03.20 added a putnl() at end of error_summary()
1994.03.24 error summary to stderr too
1994.04.27 cWarnings and cErrors now static
1994.06.03 fixed so SunOS version should cope with DOS error message file
1994.06.09 added home directory environmental variable
1994.06.18 fixed Norcroft warning
1994.06.20 added int argument to warning, error and fatal
1994.08.31 added fputnl()
1994.09.13 added fix for caverot signals being invisible under RISC OS
1994.09.13 removed 'cos it doesn't work
1994.09.20 fixed signal handler to longjmp back so it's now truely ANSI
           miscellaneous fettling
1994.09.21 rearranged signal handler code to minimize stack use
1994.09.22 should now be able to read multi-language message file
1994.09.28 xosmalloc is now a macro in error.h
1994.10.04 no longer pass NULL for szExt to fopenWithPathAndExt
1994.10.05 DEFAULTLANG and szLangVar added
1994.10.08 sizeof -> ossizeof
1994.11.16 errno.h wanted even if we're not signal handling
1994.11.23 UsePth and AddExt now insert a separator if appropriate
           fopenWithPthAndExt now uses UsePth and AddExt
1994.12.03 added FNM_SEP_LEV2
1994.12.06 stderr -> STDERR; STDERR #defined to stdout
1994.12.10 fopenWithPthAndExt() copes with NULL for pth or ext
1995.03.25 added osstrdup
1995.06.26 fixed bug with UsePth("",leafname)
1995.10.06 commented out some debug code
1995.10.11 fixed getline to take a buffer length
1996.02.10 pszTable entries can now be NULL, as can szSingTab
1996.02.19 fixed 2 sizeof() to ossizeof()
1996.03.22 fettled layout
1996.05.05 added CDECL
1997.01.19 started code to support multiple charsets at once
1997.01.22 finished off up charset code (merged in tex.h):
>1993.11.20 created
>1993.11.26 moved chOpenQuotes and chCloseQuotes to here too
>1994.03.13 characters 128-159 translated to \xXX codes to placate compilers
>1994.03.23 added caveat comment about top-bit-set characters
>1994.12.03 added -DISO8859_1 to makefile to force iso-8859-1
>1995.02.14 changed "char foo[]=" to "char *foo="
>1996.02.10 pszTable is now an array of char *, which can be NULL
>          szSingTab can also be NULL
1997.06.05 added const
1998.03.04 more const
1998.03.21 fixed up to compile cleanly on Linux
*/

/* Beware: This file contains top-bit-set characters (160-255), so be     */
/* careful of mailers, ascii ftp, etc                                     */

/* Tables for TeX style accented chars, etc for use with Survex           */
/* Copyright (C) Olly Betts 1993-1996                                     */

/* NB if (as in TeX) \o and \O mean slashed-o and slashed-O, we can't
 * have \oe and \OE for linked-oe and linked-OE without cleverer code.
 * Therefore, I've changed slashed-o and slashed-O to \/o and \/O.
 */

/*
Function List
xosmalloc:       malloc, but indirected so we can eg do DOS XMS malloc
osmalloc:        ditto, but traps failure and gives fatal error
xosrealloc:      realloc, but indirected so we can eg do DOS XMS malloc
osrealloc:       ditto, but traps failure and gives fatal error
osfree:          free, but indirected so we can eg do DOS XMS malloc
report_sig:      catches signals and prints explanatory message
ReadErrorFile:   initialisation function - should be called first (ish)
warning:         report warning
error:           report error
fatal:           report fatal error and exit
fAbsoluteFnm:    is fnm definitely absolute?
fAmbiguousFnm:   could fnm be interpreted as both absolute and relative?
PthFromFnm:      extract path from fnm
LfFromFnm:       extract leafname from fnm
UsePth:          concatenate path & leafname
UseExt:          bung an extension on
fopenWithPthAndExt:
                 open file, passing back filename actually used
safe_fopen:      like fopen, but returns NULL for directories under all OS
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>
#include <errno.h>

#include "whichos.h"
#include "error.h"
#include "osdepend.h"
#include "filelist.h"
#include "debug.h"
#include "version.h"

#ifdef HAVE_SIGNAL
# ifdef HAVE_SETJMP
#  include <setjmp.h>
static jmp_buf jmpbufSignal;
#  include <signal.h>
# else
#  undef HAVE_SIGNAL
# endif
#endif

/* This is the name of the default language -- set like this so folks can
 * add (for eg) -DDEFAULTLANG="fren" to UFLG in the makefile
 */
#ifndef DEFAULTLANG
# define DEFAULTLANG "engi"
#endif

#define STDERR stdout

/* For funcs which want to be immune from messing around with different
 * calling conventions */
#ifndef CDECL
#define CDECL
#endif

/* These are English versions of messages which might be needed before the
 * alternative language version has been read from the message file.
 */
static const char * ergBootstrap[]={
   "",
   "Out of memory (couldn't find %ul bytes).\n",
   "\nFatal error from %s: ",
   "\nError from %s: ",
   "\nWarning from %s: ",
   "Message file has incorrect format\n", /* was "Error message file ..." */
   "Negative error numbers are not allowed\n",
   NULL /* NULL marks end of list */
};

static const char **erg = ergBootstrap;
static int enMac = 32; /* Initially, grows automatically */
static const char *szBadEn = "???";

static int cWarnings = 0; /* keep track of how many warnings we've given */
static int cErrors = 0;   /* and how many (non-fatal) errors */

extern int error_summary(void) {
   fprintf(STDERR,msg(16),cWarnings,cErrors);
   fputnl(STDERR);
   return ( cErrors ? EXIT_FAILURE : EXIT_SUCCESS );
}

/* in case osmalloc() fails before szAppNameCopy is set up */
static const char *szAppNameCopy="anonymous program";

/* error code for failed osmalloc and osrealloc calls */
static void outofmem(OSSIZE_T size) {
   fprintf( STDERR, erg[2], szAppNameCopy );
   fprintf( STDERR, erg[1], (unsigned long)size );
   exit(EXIT_FAILURE);
}

/* malloc with error catching if it fails. Also allows us to write special
 * versions easily eg for DOS EMS or MS Windows.
 */
extern void FAR * osmalloc( OSSIZE_T size ) {
   void FAR *p;
   p=xosmalloc( size );
   if (p==NULL)
      outofmem(size);
   return p;
}

/* realloc with error catching if it fails. */
extern void FAR * osrealloc( void *p, OSSIZE_T size ) {
   p=xosrealloc(p,size);
   if (p==NULL)
      outofmem(size);
   return p;
}

extern void FAR * osstrdup( const char *sz ) {
   char *p;
   int len;
   len=strlen(sz)+1;
   p=osmalloc(len);
   memmove(p,sz,len);
   return p;
}

/* osfree is currently a macro in error.h */

#ifdef HAVE_SIGNAL

static int sigReceived;

/* for systems not using autoconf, assume the signal handler returns void
 * unless specified elsewhere */
#ifndef RETSIGTYPE
#define RETSIGTYPE void
#endif

static CDECL RETSIGTYPE FAR report_sig( int sig ) {
   sigReceived=sig;
   longjmp(jmpbufSignal,1);
}

static void init_signals( void ) {
   int en;
   if (!setjmp(jmpbufSignal)) {
      signal(SIGABRT,report_sig); /* abnormal termination eg abort() */
      signal(SIGFPE ,report_sig); /* arithmetic error eg /0 or overflow */
      signal(SIGILL ,report_sig); /* illegal function image eg illegal instruction */
      signal(SIGINT ,report_sig); /* interactive attention eg interrupt */
      signal(SIGSEGV,report_sig); /* illegal storage access eg access outside memory limits */
      signal(SIGTERM,report_sig); /* termination request sent to program */
# ifdef SIGSTAK /* only on RISC OS AFAIK */
      signal(SIGSTAK,report_sig); /* stack overflow */
# endif
      return;
   }
   fprintf(STDERR,msg(2),szAppNameCopy);
   switch (sigReceived) {
    case SIGABRT: en=90; break;
    case SIGFPE:  en=91; break;
    case SIGILL:  en=92; break;
    case SIGINT:  en=93; break;
    case SIGSEGV: en=94; break;
    case SIGTERM: en=95; break;
# ifdef SIGSTAK
    case SIGSTAK: en=96; break;
# endif
    default:      en=97; break;
   }
   fputsnl(msg(en),STDERR);
   if (errno >= 0) {
# ifdef HAVE_STRERROR
      fputsnl(strerror(errno),STDERR);
# elif defined(HAVE_SYS_ERRLIST)
      if (errno < sys_nerr)
         fputsnl( STDERR, sys_errlist[errno] );
# elif defined(HAVE_PERROR)
      perror(NULL); /* always goes to stderr */
      /* if (arg!=NULL && *arg!='\0') fputs("<arg>: <err>\n",stderr); */
      /* else fputs("<err>\n",stderr); */
# else
      fprintf( STDERR, "error code %d\n", errno );
# endif
   }
   if (sigReceived!=SIGINT && sigReceived!=SIGTERM)
      fatal(11,NULL,NULL,0); /* shouldn't get any others => bug */
   exit(EXIT_FAILURE);
}
#endif

/* write string and nl to STDERR */
extern void wr( const char *sz, int n ) {
   n=n; /* suppress warning */
   fputsnl(sz,STDERR);
}

#define CHARSET_BAD       -1
#define CHARSET_USASCII    0
#define CHARSET_ISO_8859_1 1
#define CHARSET_DOSCP850   2
#define CHARSET_RISCOS31   3
static int default_charset( void ) {
#ifdef ISO8859_1
   return CHARSET_ISO_8859_1;
#elif (OS==RISCOS)
/*
RISCOS 3.1 and above
CHARSET_RISCOS31 !HCAK!
*/
   return CHARSET_ISO_8859_1;
#elif (OS==MSDOS)
   return CHARSET_DOSCP850;
#else
   return CHARSET_ISO_8859_1; /*!HACK!*/
#endif
}

static const char *pthMe=NULL, *lfErrs=NULL;
static char prefix[5];
static int prefix_len;

static void parse_msg_file( int charset_code ) {
  FILE *fh;
  char estr[256], line[256];
  int en;
  int c;
  bool fQuoted;
#ifndef NO_ACCENTS
  char chOpenQuotes, chCloseQuotes;
  char *szSingles;
  char *szSingTab;
  char *szAccents;
  char *szLetters;
  char **pszTable;

  switch (charset_code) {
     case CHARSET_USASCII: {
        /* US ASCII */
        chOpenQuotes = '\"';
        chCloseQuotes = '\"';
        szSingles = "";
        szSingTab = NULL;
        szAccents = "";
        szLetters = "";
        pszTable = NULL;
        break;
     }
     case CHARSET_ISO_8859_1: {
        /* ISO 8859/1 (Latin 1) */
        static char *my_pszTable[]={
         "àèòÀìùÈÌÒÙ",
         "áéóÁíúÉÍÓÚýÝ",
         "âêôÂîûÊÎÔÛ",
         "äëöÄïüËÏÖÜÿ",
         "ã õà    Õ   ñÑ",
         NULL,
         NULL,
         NULL,
         NULL,
         NULL,
         NULL,
         "              ç",
         "               Ç",
         NULL,
         "ª º",
         "åæ",
         "   Å  Æ",
         "                  ß",
         NULL,
         NULL,
         "  ø     Ø"
        };
        chOpenQuotes = '\"';
        chCloseQuotes = '\"';
        szSingles = "";
        szSingTab = NULL;
        szAccents = "`'^\"~=.uvHtcCdbaAsOo/";
        szLetters = "aeoAiuEIOUyYnNcCwWs";
        pszTable = my_pszTable;
        break;
     }
     case CHARSET_RISCOS31: {
        /* Archimedes RISC OS 3.1 and above
         * ISO 8859/1 (Latin 1) + extensions in 128-159 */
        static char *my_pszTable[]={
         "àèòÀìùÈÌÒÙ",
         "áéóÁíúÉÍÓÚýÝ",
         "âêôÂîûÊÎÔÛ\x86\x85    \x82\x81",
         "äëöÄïüËÏÖÜÿ",
         "ã õà    Õ   ñÑ",
         NULL,
         NULL,
         NULL,
         NULL,
         NULL,
         NULL,
         "              ç",
         "               Ç",
         NULL,
         "ª º",
         "åæ",
         "   Å  Æ",
         "                  ß",
         "      \x9a",
         " \x9b",
         "  ø     Ø"
        };
        chOpenQuotes='\x94';
        chCloseQuotes='\x95';
        szSingles="";
        szSingTab=NULL;
        szAccents="`'^\"~=.uvHtcCdbaAsOo/";
        szLetters="aeoAiuEIOUyYnNcCwWs";
        pszTable = my_pszTable;
        break;
     }
     case CHARSET_DOSCP850: {
        /* MS DOS - Code page 850 */
        static char *my_pszTable[]={
         "\x85\x8A\x95·\x8D\x97Ô ãëìí",
         " \x82¢µ¡£\x90Öàé",
         "\x83\x88\x93¶\x8C\x96Ò×âê",
         "\x84\x89\x94\x8E\x8B\x81ÓØ\x99\x9A\x98",
         "Æ äÇ    å   ¤¥",
         NULL,
         NULL,
         NULL,
         NULL,
         NULL,
         NULL,
         "              \x87",
         "               \x80",
         NULL,
         "¦ §",
         "\x86\x91",
         "   \x8F  \x92",
         "                  á",
         NULL,
         NULL,
         "  \x9B     \x9D"
        };
        chOpenQuotes='\"';
        chCloseQuotes='\"';
        szSingles="lLij";
        szSingTab="  Õ";
        szAccents="`'^\"~=.uvHtcCdbaAsOo/";
        szLetters="aeoAiuEIOUyYnNcCwWs";
        pszTable = my_pszTable;
        break;
     }
#if 0
/* MS DOS - PC-8 (code page 437?) */
static char chOpenQuotes='\"', chCloseQuotes='\"';
static char *szSingles="";
static char *szSingTab=NULL;
static char *szAccents="`'^\"~=.uvHtcCdbaAsOo/";
static char *szLetters="aeoAiuEIOUyYnNcCwWs";
static char *pszTable[]={
 "\x85\x8A\x95 \x8D\x97",
 " \x82¢ ¡£\x90",
 "\x83\x88\x93 \x8C\x96",
 "\x84\x89\x94\x8E\x8B\x81  \x99\x9A\x98",
 "            ¤¥",
 NULL,
 NULL,
 NULL,
 NULL,
 NULL,
 NULL,
 "              \x87",
 "               \x80",
 NULL,
 "¦ §",
 "\x86\x91",
 "   \x8F  \x92",
 "                  á",
 NULL,
 NULL,
 NULL
};

#elif 0
/* MS DOS - PC-8 Denmark/Norway */
static char chOpenQuotes='\"', chCloseQuotes='\"';
static char *szSingles="";
static char *szSingTab=NULL;
static char *szAccents="`'^\"~=.uvHtcCdbaAsOo/";
static char *szLetters="aeoAiuEIOUyYnNcCwWs";
static char *pszTable[]={
 "\x85\x8A\x95 \x8D\x97",
 " \x82¢ ¡£\x90     ¬",
 "\x83\x88\x93 \x8C\x96",
 "\x84\x89\x94\x8E\x8B\x81  \x99\x9A\x98",
 "© ¦ª    §   ¤¥",
 NULL,
 NULL,
 NULL,
 NULL,
 NULL,
 NULL,
 "              \x87",
 "               \x80",
 NULL,
 NULL,
 "\x86\x91",
 "   \x8F  \x92",
 "                  á",
 NULL,
 NULL,
 NULL
};
#elif 0
/* No special chars... */
# define NO_TEX
#endif
default: /*!HACK! do something -- no_tex variable version of NO_TEX ? */
printf("oops, bad charset...\n");
(void)0;
  }
#endif

#if 0
printf("opening error file\n");
printf("(%s %s)\n",pthMe,lfErrs);
#endif
  fh=fopenWithPthAndExt( pthMe, lfErrs, "", "rb", NULL );
#if 0
printf("opened error file\n");
#endif
  if (!fh) {
    /* no point extracting this error, as it won't get used if file opens */
    fprintf(STDERR, erg[3], szAppNameCopy );
    fprintf(STDERR, "Can't open message file '%s' using path '%s'\n",
            lfErrs, pthMe);
    exit(EXIT_FAILURE);
  }

  { /* copy bootstrap erg[] which'll get overwritten by file entries */
     const char **ergMalloc;
     erg = ergBootstrap;
     ergMalloc = osmalloc( enMac * ossizeof(char*) );
     /* NULL marks end of list */
     for ( en = 0 ; erg[en] ; en++ ) ergMalloc[en]=erg[en];
     for ( ; en < enMac ; en++ ) ergMalloc[en] = szBadEn;
     erg = ergMalloc;
  }

  while (!feof( fh )) {
#ifndef ERRC
    const char *p, *q;
    getline( line, ossizeof(line), fh );
    if (strncmp( line, prefix, prefix_len ) == 0) {
      long val = strtol( line+prefix_len, &q, 0);
      if (val < 0 || val > (unsigned long)INT_MAX) {
        fprintf( STDERR, erg[3], szAppNameCopy );
        fprintf( STDERR, erg[ (errno==ERANGE) ? 5 : 6 ] );
#else /* ERRC */
    char *q;
    getline(line,ossizeof(line),fh);
    if (strncmp(line,prefix,prefix_len)==0) {
      long val=strtol(line+prefix_len,&q,0);
      if (val<0 || val>(unsigned long)INT_MAX) {
        fprintf(STDERR, erg[3], szAppNameCopy);
        fprintf(STDERR,erg[ (errno==ERANGE)?5:6 ]);
#endif /* ERRC */
        exit(EXIT_FAILURE);
      }
#ifndef ERRC
      en = (int)val;
      while (isspace(*q)) q++;

      p = q + strlen(q);
      while (p > q && isspace(p[-1])) p--;

      fQuoted = (p > q + 1 && *q == '\"' && *(p-1) == '\"');
      if (fQuoted) {
         q++;
         p--;
      }
      *p = '\0';

      c = 0;
      while (*q) {
         if (*q == '&') {
            if (*(q+1) == '#') {
               if (isdigit(*(q+2))) {
                  unsigned long value = strtoul( q+2, &q, 10);
                  if (*q == ';') q++;
                  /* add entity number value at estr[c] */
                  continue;
               }
            } else if (isalnum(*q+1)) { /* or isalpha? !HACK! */
               const char *entity;
               int entity_len;
               entity = q+1;
               q += 2;
               while (isalnum(*q)) q++;
               entity_len = q - entity;
               if (*q == ';') q++;
               if (/* add entity "entity" at estr[c] ok*/) continue;
               q = entity - 1;
#else /* ERRC */
      en=(int)val;
      while (isspace(*q))
        q++;
      fQuoted=(*q=='\"');
      if (fQuoted)
        q++;
      c=0;
      while (*q && !(fQuoted && *q=='\"') ) {
        if (*q=='\'' || *q=='`') /* convert `` and '' to left/right " */ {
          if (*q==*(q+1)) {
#ifndef NO_TEX
            estr[c++] = ( *q=='`' ? chOpenQuotes : chCloseQuotes );
#else
            estr[c++] = '\"';
#endif /* !NO_TEX */
            q+=2;
            continue;
          }
        }
        if (*q!='\\')
          estr[c++]=*q;
        else {
          q++;
          switch (*q) {
            case 'n': /* '\n' */
              estr[c++]='\n';
              break;
            case '\0': /* \ at end of line, so concatenate lines */
              getline(line,ossizeof(line),fh);
              if (strncmp(line,prefix,prefix_len)!=0) { /* bad format */
                fprintf(STDERR, erg[3], szAppNameCopy);
                fprintf(STDERR,erg[5]);
                exit(EXIT_FAILURE);
              }
              q=line+prefix_len;
              continue;
#ifndef NO_TEX
            default: {
              char *p;
              int i, accent;
              p=strchr(szSingles,*q);
              if (p && szSingTab) {
                estr[c++]=szSingTab[p-szSingles];
                break;
              }
              p=strchr(szAccents,*q);
              if (!p) {
                if (*q!='\\')
                  estr[c++]='\\';
                break; /* \\ becomes \ and \<unknown> is not translated */
              }
              accent=p-szAccents;
              q++;
              p=strchr(szLetters,*q);
              if (!p) {
                estr[c++]='\\';
                estr[c++]=szAccents[accent];
                break;
              }
              i=p-szLetters;
              if (pszTable[accent] && i<strlen(pszTable[accent])) {
                char ch;
                ch=pszTable[accent][i];
                if (ch!=32) {
                  estr[c++]=ch;
                  break;
                }
              }
              estr[c++]='\\';
              estr[c++]=szAccents[accent];
              estr[c++]=szLetters[i];
#endif /* ERRC */
            }
#ifndef ERRC
         }
         if (*q < 32 || *q >= 127) {
            printf( STDERR, "Warning: literal character '%c' (value %d) "
                    "in message %d\n", *q, (int)*q, en );
         }
         estr[c++] = *q++;
#else /* ERRC */
#endif /* !NO_TEX */
          }
        }
        q++;
#endif /* ERRC */
      }
#ifndef ERRC
      estr[c] = '\0';
#endif /* not ERRC */

#ifndef ERRC
      if (en >= enMac) {
         int enTmp;
         enTmp = enMac;
         enMac = enMac<<1;
         erg = osrealloc( erg, enMac * ossizeof(char*) );
         while (enTmp < enMac) erg[enTmp++] = szBadEn;
#else /* ERRC */
      if (!fQuoted) /* if string wasn't quoted, trim off spaces... */
        while (c>0 && estr[c-1]==' ')
          c--;
      estr[c]='\0';
      if (en>=enMac) {
        int enTmp;
        enTmp=enMac;
        enMac=enMac<<1;
        erg = osrealloc(erg, enMac * ossizeof(char*) );
        for ( ; enTmp < enMac ; enTmp++ ) erg[enTmp] = szBadEn;
#endif /* ERRC */
      }
      erg[en] = osstrdup(estr);
/*printf("Error number %d: %s\n",en,erg[en]);*/
    }
  }
  fclose(fh);
}

extern const char * FAR ReadErrorFile( const char *szAppName, const char *szEnvVar,
                                       const char *szLangVar, const char *argv0,
                                       const char *lfErrFile ) {
  int  c;
  char *szTmp;

  lfErrs = osstrdup(lfErrFile);
#ifdef HAVE_SIGNAL
  init_signals();
#endif
  /* This code *should* be completely bomb-proof :) even if strcpy()
   * generates a signal
   */
  szAppNameCopy=szAppName; /* ... in case the osstrdup() fails */
  szAppNameCopy=osstrdup(szAppName);

  /* Look for env. var. "SURVEXHOME" or the like */
  if (szEnvVar && *szEnvVar && (szTmp=getenv(szEnvVar))!=NULL && *szTmp) {
    pthMe = osstrdup(szTmp);
  } else if (argv0) /* else try the path on argv[0] */
    pthMe = PthFromFnm(argv0);
  else /* otherwise, forget it - go for the current directory */
    pthMe = "";

  /* Look for env. var. "SURVEXLANG" or the like */
  if ((szTmp=getenv(szLangVar))==0 || !*szTmp)
    szTmp=DEFAULTLANG;
  for( c=0 ; c<4 && szTmp[c] ; c++ )
    prefix[c]=tolower(szTmp[c]);
  prefix[c++]=':';
  prefix[c]='\0';
  prefix_len=strlen(prefix);

  select_charset(default_charset());

  if (erg[0]==szBadEn) {
    fprintf(STDERR, erg[3], szAppName );
    /* no point extracting this message */
    fprintf(STDERR, "No messages in language '%s'\n",prefix);
    exit(EXIT_FAILURE);
  }
  if (strcmp(MESSAGE_VERSION_MIN,erg[0])>0 || strcmp(VERSION,erg[0])<0)
    /* a little tacky, but'll work */
    fatal(191,wr,MESSAGE_VERSION_MIN" - "VERSION,0);

  return pthMe;
}

extern const char *msg( int en ) /* message may be overwritten by next call */ {
  return ( (en<0||en>=enMac) ? szBadEn : erg[en] );
}

extern const char *msgPerm( int en ) /* returns persistent copy of message */ {
  return ( (en<0||en>=enMac) ? szBadEn : erg[en] );
}

static void FAR errdisp( int en, void (*fn)( const char *, int ), const char *szArg, int n,
                         int type ) {
  fputnl( STDERR );
  fprintf( STDERR, erg[type], szAppNameCopy );
  fputs( msg(en), STDERR);
  fputnl( STDERR );
  if (fn)
    (fn)( szArg, n );
}

extern void FAR warning( int en, void (*fn)( const char *, int ), const char *szArg, int n ) {
  cWarnings++; /* And another notch in the bedpost... */
  errdisp( en, fn, szArg, n, 4 );
}

extern void FAR error( int en, void (*fn)( const char *, int ), const char *szArg, int n ) {
  cErrors++; /* non-fatal errors now return... */
  errdisp( en, fn, szArg, n, 3 );
}

extern void FAR fatal( int en, void (*fn)( const char *, int ), const char *szArg, int n ) {
  errdisp( en, fn, szArg, n, 2 );
  exit(EXIT_FAILURE);
}

#if 1
/* Code to support switching character set at runtime (e.g. for a printer
 * driver to support different character sets on screen and on the printer)
 */
typedef struct charset_li {
   struct charset_li *next;
   int code;
   const char **erg;
} charset_li;

static charset_li *charset_head = NULL;

static int charset = CHARSET_BAD;

int select_charset( int charset_code ) {
   int old_charset = charset;
   charset_li *p;

/*   printf( "select_charset(%d), old charset = %d\n", charset_code, charset ); */

   charset = charset_code;

   /* check if we've already parsed messages for new charset */
   for( p = charset_head ; p ; p = p->next ) {
/*      printf("%p: code %d erg %p\n",p,p->code,p->erg); */
      if (p->code == charset) {
         erg = p->erg;
         goto found;
      }
   }

   /* nope, got to reparse message file */
   parse_msg_file( charset_code );

   /* add to list */
   p = osnew(charset_li);
/*   p = osmalloc(256); */
   p->code = charset;
   p->erg = erg;
   p->next = charset_head;
   charset_head = p;

   found:
   return old_charset;
}
#endif