hshell.c

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      }
   }
   printf("\n");
}

/* EXPORT->GetConfig: return a list of selected config values */
int GetConfig(char *user, Boolean incGlob, ConfParam **list, int max)
{
   ConfigEntry *e;
   int found = 0;

   /* Specific ones first */
   if (user!=NULL)
      for (e=confList; e!= NULL; e=e->next){
         if (e->param.user!=NULL && strcmp(e->param.user,user)==0) {
            ++found;
            if (list != NULL) {
               if (found>max) 
                  HError(5071,"GetConfig: more than %d for user %s%s",
                         max,user==NULL?"<null>":user,incGlob?"with globals":"");
               *list++ = &e->param;
            }
         }
      }
   /* Then append globals */
   if (incGlob || user==NULL)
      for (e=confList; e!= NULL; e=e->next){
         if (e->param.user==NULL) {
            ++found;
            if (list != NULL) {
               if (found>max) 
                  HError(5071,"GetConfig: more than %d for user %s%s",
                         max,user==NULL?"<null>":user,incGlob?"with globals":"");
               *list++ = &e->param;
            }
         }
      }
   return found;
}

/* FindConfParm: return index of conf parameter with given name and kind*/
static int FindConfParm(ConfParam **list,int size,char *name,ConfKind kind)
{
   int i;
   
   for (i=0; i<size; i++)
      if (strcmp(list[i]->name,name)==0){
         if (kind != AnyCKind && list[i]->kind != kind && 
             !(list[i]->kind==IntCKind && kind==FltCKind))
            HError(5072,"FindConfParm: %s is %s but should be type %s",
                   name,cfkmap[list[i]->kind],cfkmap[kind]);
         list[i]->seen=TRUE;
         return i;
      }
   return -1;
}

/* EXPORT->HasConfParm: true if parameter exists with given name */
Boolean HasConfParm(ConfParam **list, int size, char *name)
{
   return (FindConfParm(list,size,name,AnyCKind) != -1);
}

/* EXPORT->GetConfStr: return string parameter with given name */
Boolean GetConfStr(ConfParam **list,int size,char *name,char *str)
{
   int i;
   
   if ((i = FindConfParm(list,size,name,StrCKind)) != -1){
      strcpy(str,list[i]->val.s);
      return TRUE;
   }
   return FALSE;
}

/* EXPORT->GetConfBool: return Boolean parameter with given name */
Boolean GetConfBool(ConfParam **list,int size,char *name, Boolean *b)
{
   int i;
   
   if ((i = FindConfParm(list,size,name,BoolCKind)) != -1){
      *b = list[i]->val.b;
      return TRUE;
   }
   return FALSE;
}

/* EXPORT->GetConfInt: return integer parameter with given name */
Boolean GetConfInt(ConfParam **list,int size,char *name, int *ival)
{
   int i;
   
   if ((i = FindConfParm(list,size,name,IntCKind)) != -1){
      *ival = list[i]->val.i;
      return TRUE;
   }
   return FALSE;
}

/* EXPORT->GetConfFlt: return float parameter with given name */
Boolean GetConfFlt(ConfParam **list,int size,char *name, double *fval)
{
   int i;
   
   if ((i = FindConfParm(list,size,name,FltCKind)) != -1){
      *fval = (list[i]->kind==FltCKind)?list[i]->val.f:list[i]->val.i;
      return TRUE;
   }
   return FALSE;
}


/* ------------------ Argument Processing -------------------- */

/*
  Arguments are processed in sequence by calls to Getxxx().
  The enum type ArgKind is used to indicate the kind of the next
  argument 
  
  SWITCHARG - any str starting with '-' char
  FLOATARG  - any str which is a valid number and contains a '.'
  INTARG    - any str which is a valid number and is not a FLOATARG
  STRINGARG - any str in double quotes or not one of the above 
  NOARG     - returned when all arguments processed
     
  Each of the Getxxx() functions will return value of next arg in 
  form specified by xxx, an error is reported if next arg is not of 
  the required type except that an int will be converted to a float 
  if requested.  The list of args is actually a copy from which the
  standard HShell options -C and -S have been removed.
   
  If a script file is set, then the contents of the script file
  are effectively appended to the command line.  However, the
  actual strings returned for args in the script are volatile and
  should be copied by the host program where necessary.

*/

static int argcount;          /* total args = argc */
static int nextarg=1;         /* next arg to return in GetxxxArg */
static char *defargs[2]={ "<Uninitialised>", "" };
static char **arglist=defargs;/* actual arg list */
static FILE *script = NULL;   /* script file if any */
static int scriptcount = 0;   /* num words in script */
static char scriptBuf[256];   /* buffer for current script arg */
static Boolean scriptBufLoaded = FALSE;
static Boolean wasQuoted;     /* true if next arg was quoted */
static ConfParam *cParm[MAXGLOBS];      /* config parameters */
static int nParm = 0;

/* ScriptWord: return next word from script */
static char * ScriptWord(void)
{
   int ch,qch,i;
   
   i=0; ch=' ';
   while (isspace(ch)) ch = fgetc(script);
   if (ch==EOF) return NULL;
   if (ch=='\'' || ch=='"'){
      qch = ch;
      ch = fgetc(script);
      while (ch != qch && ch != EOF) {
         scriptBuf[i++] = ch;           /* #### ge: should check for overflow of scriptBuf */
         ch = fgetc(script);
      }
      if (ch==EOF)
         HError(5051,"ScriptWord: Closing quote missing in script file");
      wasQuoted = TRUE;
   } else {
      do {
         scriptBuf[i++] = ch; 
         ch = fgetc(script);
      }while (!isspace(ch) && ch != EOF);
      wasQuoted = FALSE;
   }
   scriptBuf[i] = '\0';
   scriptBufLoaded = TRUE;
   return scriptBuf;
}
         
/* GetNextArg: from either command line or script file */
static char * GetNextArg(Boolean step)
{
   char *s;
   
   if (argcount>nextarg){
      s = arglist[nextarg];
      wasQuoted = FALSE;
   } else if (scriptBufLoaded)
      s = scriptBuf;
   else
      s = ScriptWord();
   if (step) {
      ++nextarg;
      scriptBufLoaded = FALSE;
   }
   return s;
}

/* EXPORT->NumArgs: Number of actual cmd line arguments left unprocessed */
int  NumArgs(void)
{
   return argcount+scriptcount-nextarg;
}

/* EXPORT->NextArg: Kind of next argument */
ArgKind NextArg(void)
{
   char *s,*p;
   
   if (NumArgs() == 0) return NOARG;
   s = GetNextArg(FALSE);
   if (wasQuoted)
      return STRINGARG;
   if (NumHead(s)){
      strtod(s,&p);
      if (p==NULL || *p == '\0'){
         if (strchr(s,'.') == NULL)
            return INTARG;
         else
            return FLOATARG;
      }
   }
   if (*s=='-') 
      return SWITCHARG;
   return STRINGARG;
}

/* ArgError: called when next arg is different to requested arg 
   or no more args are left */
static void ArgError(char *s)
{
   if (NextArg()==NOARG)
      HError(5020,"ArgError: %s arg requested but no args left",s);
   else
      HError(5021,"ArgError: %s arg requested but next is %s",s,GetNextArg(FALSE));
}

/* EXPORT->GetStrArg: get string arg */
char * GetStrArg(void)
{
   char *s;

   if (NextArg() != STRINGARG) 
      ArgError("String");

   s = GetNextArg (TRUE);
   if (extendedFileNames)
      s = RegisterExtFileName (s);

   return s;
}
   
/* EXPORT->GetSwtArg: get switch arg */
char * GetSwtArg(void)
{
   if (NextArg() != SWITCHARG) 
      ArgError("Switch");
   return GetNextArg(TRUE)+1;
}

/* EXPORT->GetIntArg: get int arg */
int GetIntArg(void)
{
   int i;
   char *s;
   
   if (NextArg() != INTARG) 
      ArgError("Int");
   s = GetNextArg(TRUE);
   if (sscanf(s,"%i",&i) !=1)
      HError(5090,"GetIntArg: Integer Argument %s",s);
   return i;
}

/* EXPORT->GetLongArg: get long arg */
long GetLongArg(void)
{
   long i;
   char *s;
   
   if (NextArg() != INTARG) 
      ArgError("int");
   s = GetNextArg(TRUE);
   if (sscanf(s,"%li",&i) !=1)
      HError(5090,"GetLongArg: Integer Argument %s",s);
   return i;
}

/* EXPORT->GetFltArg: get float arg */
float GetFltArg(void)
{
   int k = NextArg();
   
   if (k != INTARG && k != FLOATARG) 
      ArgError("Float");
   return atof(GetNextArg(TRUE));

}

/* EXPORT->GetChkedInt: range checked version of GetIntArg */
int GetChkedInt(int min, int max, char * swtname)
{
   int val;
   
   if (NextArg() != INTARG) 
      HError(5021,"GetChkedInt: Integer Arg Required for %s option",swtname);
   val=GetIntArg();
   if (val<min || val>max) 
      HError(5022,"GetChkedInt: Integer arg out of range in %s option",swtname);
   return val;
}

/* EXPORT->GetChkedLong: range checked version of GetIntArg */
long GetChkedLong(long min, long max, char * swtname)
{
   long val;
   
   if (NextArg() != INTARG) 
      HError(5021,"GetChkedLong: Integer Arg Required for %s option",swtname);
   val=GetLongArg();
   if (val<min || val>max) 
      HError(5022,"GetChkedLong: Long arg out of range in %s option",swtname);
   return val;
}

/* EXPORT->GetChkedFlt: range checked version of GetFltArg */
float GetChkedFlt(float min, float max, char * swtname)
{
   float val;
   
   if (NextArg() != INTARG && NextArg() != FLOATARG) 
      HError(5021,"GetChkedFlt: Float Arg Required for %s option",swtname);
   val=GetFltArg();
   if (val<min || val>max) 
      HError(5022,"GetChkedFlt: Float arg out of range in %s option",swtname);
   return val;
}

/* EXPORT->GetIntEnvVar: get integer environment variable */
Boolean GetIntEnvVar(char *envVar, int *value)
{
   char *env;
   
   if ((env = getenv(envVar)) == NULL) return FALSE;
   *value = atoi(env);
   return TRUE;
}

static char *CheckFn(char *fn);

/* SetScriptFile: open script file and count words in it */

ReturnStatus SetScriptFile(char *fn)
{
   CheckFn(fn);
   if ((script = fopen(fn,"r")) == NULL){  /* Don't care if text/binary */
      HRError(5010,"SetScriptFile: Cannot open script file %s",fn);
      return(FAIL);
   }
   while (ScriptWord() != NULL) ++scriptcount;
   rewind(script);
   scriptBufLoaded = FALSE;
   return(SUCCESS);
}

/* -------------------- Input Files/Pipes -------------------- */

static char *filtermap[] = {
   "HWAVEFILTER", "HPARMFILTER", "HLANGMODFILTER", "HMMLISTFILTER", 
   "HMMDEFFILTER", "HLABELFILTER", "HNETFILTER", "HDICTFILTER", 
   "LGRAMFILTER",  "LWMAPFILTER",  "LCMAPFILTER", "LMTEXTFILTER", 
   "HNOFILTER",
   "HWAVEOFILTER", "HPARMOFILTER", "HLANGMODOFILTER", "HMMLISTOFILTER", 
   "HMMDEFOFILTER", "HLABELOFILTER", "HNETOFILTER", "HDICTOFILTER",
   "LGRAMOFILTER",  "LWMAPOFILTER",  "LCMAPOFILTER", 
   "HNOOFILTER"
};

/* FilterSet: returns true and puts filter cmd in s if configuration
              parameter or environment variable set */
static Boolean FilterSet(IOFilter filter, char *s)
{
   char *env;
 
   if ((env = getenv(filtermap[filter])) != NULL){
      strcpy(s,env);
      return TRUE;
   } else if (GetConfStr(cParm,nParm,filtermap[filter],s))
      return TRUE;
   else
      return FALSE;
}

/* EXPORT->SubstFName: subst fname for $, if any, in s */
void SubstFName(char *fname, char *s)
{
   char *p;
   char buf[1028];

   while ((p=strchr(s,'$')) != NULL){
      *p = '\0'; ++p;
      strcpy(buf,s); strcat(buf,fname); strcat(buf,p);
      strcpy(s,buf);
   }
}

static int maxTry = 1;

#ifdef WIN32
#define popen _popen
#define pclose _pclose
#endif

/* EXPORT->FOpen: return either a file or a pipe */
FILE *FOpen(char *fname, IOFilter filter, Boolean *isPipe)
{
   FILE *f;
   int i;
   Boolean isInput;
   char mode[8],cmd[1028];

   if (filter <= NoFilter){ /* then input */
      isInput = TRUE;
      strcpy(mode,"r"); /* May be binary */
   } else {
      isInput = FALSE;
      strcpy(mode,"w"); /* May be binary */
   }
   
#ifndef NOPIPES
   if (FilterSet(filter,cmd)){
      SubstFName(fname,cmd);
      f = (FILE *)popen(cmd,mode);
      *isPipe = TRUE;
      if (trace&T_IOP)
         printf("HShell: FOpen - file %s %s pipe %s\n",
                fname,isInput?"<-":"->",cmd);
      return f;
   }
#endif
   *isPipe = FALSE; strcat(mode,"b");
   for (i=1; i<=maxTry; i++){
      f = fopen(fname,mode);
      if (f!=NULL) return f;
#ifdef UNIX
      if (i<maxTry) sleep(5);
#endif
      if (trace&T_IOP)
         printf("HShell: FOpen - try %d failed on %s in mode %s\n",
                i,fname,mode);
   }
   return NULL;
}

/* EXPORT->FClose: close the given file or pipe */
void FClose(FILE *f, Boolean isPipe)
{
#ifndef NOPIPES
   if (isPipe){
      pclose(f);
      return;
   }
#endif
   if (fclose(f) != 0)
      HError (5010, "FClose: closing file failed");
}



/* EXPORT->InitSource: initialise a source */
ReturnStatus InitSource(char *fname, Source *src,  IOFilter filter)
{
   CheckFn(fname);
   strcpy(src->name,fname);
   if ((src->f = FOpen(fname, filter, &(src->isPipe))) == NULL){
      HRError(5010,"InitSource: Cannot open source file %s",fname);
      return(FAIL);
   }
   src->pbValid = FALSE;
   src->chcount = 0;
   return(SUCCESS);
}

/* EXPORT->AttachSource: attach a source to a file */
void AttachSource(FILE *file, Source *src)
{
   src->f=file;
   strcpy(src->name,"attachment");
   src->isPipe=TRUE;
   src->pbValid = FALSE;
   src->chcount = 0;
}

/* EXPORT->CloseSource: close a source */
void CloseSource(Source *src)
{
   FClose(src->f,src->isPipe);
}

/* EXPORT->SrcPosition: return string giving position in src */
char *SrcPosition(Source src, char *s)
{
   int i,line,col,c;
   long pos;

   if (src.isPipe || src.chcount>100000)
      sprintf(s,"char %d in %s",src.chcount,src.name);
   else{