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Diff for /OpenXM/src/kan96xx/Kan/ext.c between version 1.9 and 1.50

version 1.9, 2002/02/24 10:27:18 version 1.50, 2020/10/06 11:33:46
Line 1 
Line 1 
 /* $OpenXM: OpenXM/src/kan96xx/Kan/ext.c,v 1.8 2001/08/21 14:12:46 takayama Exp $ */  /* $OpenXM: OpenXM/src/kan96xx/Kan/ext.c,v 1.49 2018/09/07 00:09:32 takayama Exp $ */
 #include <stdio.h>  #include <stdio.h>
   #include <string.h>
 #include <sys/types.h>  #include <sys/types.h>
 #include <sys/stat.h>  #include <sys/stat.h>
 #include <fcntl.h>  #include <fcntl.h>
 #include <stdlib.h>  #include <stdlib.h>
 #include <unistd.h>  #include <unistd.h>
 #include <sys/wait.h>  #include <sys/wait.h>
   #include <sys/time.h>
   #include <time.h>
 #include "datatype.h"  #include "datatype.h"
 #include "stackm.h"  #include "stackm.h"
 #include "extern.h"  #include "extern.h"
 #include "extern2.h"  #include "extern2.h"
 #include <signal.h>  #include <signal.h>
 #include "plugin.h"  #include "plugin.h"
   #include "kclass.h"
   #include <ctype.h>
   #include <errno.h>
   #include <regex.h>
   #include "ox_pathfinder.h"
   #include "mysig.h"
   
   void cmoDumpCmo(struct object ob); /* defined in ../plugin/cmo0.h */
   
   extern int Quiet;
   extern char **environ;
   extern char *MsgSourceTrace;
   
 #define MYCP_SIZE 100  #define MYCP_SIZE 100
 static int Mychildren[MYCP_SIZE];  static int Mychildren[MYCP_SIZE];
 static int Mycp = 0;  static int Mycp = 0;
   static int Verbose_mywait = 0;
 static void mywait() {  static void mywait() {
   int status;    int status;
   int pid;    int pid;
   int i,j;    int i,j;
   signal(SIGCHLD,SIG_IGN);    /* mysignal(SIGCHLD,SIG_IGN); */
   pid = wait(&status);    pid = wait(&status);
   fprintf(stderr,"Child process %d is exiting.\n",pid);    if ((!Quiet) && (Verbose_mywait)) fprintf(stderr,"Child process %d is exiting.\n",pid);
   for (i=0; i<Mycp; i++) {    for (i=0; i<Mycp; i++) {
     if (Mychildren[i]  == pid) {      if (Mychildren[i]  == pid) {
       for (j=i; j<Mycp-1; j++) {        for (j=i; j<Mycp-1; j++) {
Line 31  static void mywait() {
Line 47  static void mywait() {
       if (Mycp > 0) Mycp--;        if (Mycp > 0) Mycp--;
     }      }
   }    }
   signal(SIGCHLD,mywait);    mysignal(SIGCHLD,mywait);
 }  }
   
 #define SIZE_OF_ENVSTACK 5  #define SIZE_OF_ENVSTACK 5
Line 79  static char *ext_generateUniqueFileName(char *s)
Line 95  static char *ext_generateUniqueFileName(char *s)
   return(NULL);    return(NULL);
 }  }
   
   static struct object oregexec(struct object oregex,struct object ostrArray,struct object oflag);
   
 struct object Kextension(struct object obj)  struct object Kextension(struct object obj)
 {  {
   char *key;    char *key;
   int size;    int size;
   struct object keyo;    struct object keyo = OINIT;
   struct object rob = NullObject;    struct object rob = NullObject;
   struct object obj1,obj2,obj3,obj4;    struct object obj1 = OINIT;
   int m,i,pid;    struct object obj2 = OINIT;
     struct object obj3 = OINIT;
     struct object obj4 = OINIT;
     int m,i,pid, uid;
   int argListc, fdListc;    int argListc, fdListc;
   char *abc;    char *abc;
   char *abc2;    char *abc2;
   extern struct context *CurrentContextp;    extern struct context *CurrentContextp;
     struct timeval tm;
 #if (__CYGWIN__)  #if (__CYGWIN__)
   extern sigjmp_buf EnvOfStackMachine;    extern sigjmp_buf EnvOfStackMachine;
 #else  #else
Line 98  struct object Kextension(struct object obj)
Line 120  struct object Kextension(struct object obj)
 #endif  #endif
   extern void ctrlC();    extern void ctrlC();
   extern int SigIgn;    extern int SigIgn;
   extern errno;  
   extern int DebugCMO;    extern int DebugCMO;
   extern int OXprintMessage;    extern int OXprintMessage;
   struct stat buf;    struct stat buf;
   char **argv;    char **argv;
   FILE *fp;    FILE *fp;
   void (*oldsig)();    void (*oldsig)();
   extern SecureMode;    extern int SecureMode;
     extern char *UD_str;
     extern int UD_attr;
   
   if (obj.tag != Sarray) errorKan1("%s\n","Kextension(): The argument must be an array.");    if (obj.tag != Sarray) errorKan1("%s\n","Kextension(): The argument must be an array.");
   size = getoaSize(obj);    size = getoaSize(obj);
Line 123  struct object Kextension(struct object obj)
Line 146  struct object Kextension(struct object obj)
     pushEnv(EnvOfStackMachine);      pushEnv(EnvOfStackMachine);
     m = KSexecuteString(obj1.lc.str);      m = KSexecuteString(obj1.lc.str);
     /* This is critical area. If you catch ctrl-c here, program crashes. */      /* This is critical area. If you catch ctrl-c here, program crashes. */
     oldsig = signal(SIGINT,SIG_IGN);      oldsig = mysignal(SIGINT,SIG_IGN);
     popEnv(EnvOfStackMachine);      popEnv(EnvOfStackMachine);
     /* OK! We passed the critical area. */      /* OK! We passed the critical area. */
     signal(SIGINT,oldsig);      mysignal(SIGINT,oldsig);
     rob = KpoInteger(m);      rob = KpoInteger(m);
   }else if (strcmp(key,"getpid") == 0) {    }else if (strcmp(key,"getpid") == 0) {
     rob = KpoInteger( (int) getpid() );      rob = KpoInteger( (int) getpid() );
Line 139  struct object Kextension(struct object obj)
Line 162  struct object Kextension(struct object obj)
     obj1 = getoa(obj,1);      obj1 = getoa(obj,1);
     if (obj1.tag != Sinteger) errorKan1("%s\n","[(chattrs)  num] extension.");      if (obj1.tag != Sinteger) errorKan1("%s\n","[(chattrs)  num] extension.");
     m = KopInteger(obj1);      m = KopInteger(obj1);
     if (!( m == 0 || m == PROTECT || m == ABSOLUTE_PROTECT))          /* if (!( m == 0 || m == PROTECT || m == ABSOLUTE_PROTECT || m == ATTR_INFIX))
       errorKan1("%s\n","The number must be 0, 1 or 2.");             errorKan1("%s\n","The number must be 0, 1 or 2.");*/
     putUserDictionary2((char *)NULL,0,0,m | SET_ATTR_FOR_ALL_WORDS,      putUserDictionary2((char *)NULL,0,0,m | SET_ATTR_FOR_ALL_WORDS,
                        CurrentContextp->userDictionary);                         CurrentContextp->userDictionary);
     }else if (strcmp(key,"or_attrs")==0) {
       if (size != 2) errorKan1("%s\n","[(or_attrs)  num] extension.");
       obj1 = getoa(obj,1);
       if (obj1.tag != Sinteger) errorKan1("%s\n","[(or_attrs)  num] extension.");
       m = KopInteger(obj1);
       putUserDictionary2((char *)NULL,0,0,m | OR_ATTR_FOR_ALL_WORDS,
                          CurrentContextp->userDictionary);
   }else if (strcmp(key,"keywords")==0) {    }else if (strcmp(key,"keywords")==0) {
     if (size != 1) errorKan1("%s\n","[(keywords)] extension.");      if (size != 1) errorKan1("%s\n","[(keywords)] extension.");
     rob = showSystemDictionary(1);      rob = showSystemDictionary(1);
Line 153  struct object Kextension(struct object obj)
Line 183  struct object Kextension(struct object obj)
         else {          else {
         system(KopString(getoa(obj,1))); exit(0);          system(KopString(getoa(obj,1))); exit(0);
         } */          } */
     }else if (strcmp(key,"date")==0) {
       if (size != 1) errorKan1("%s\n","[(date)] extension.");
       gettimeofday(&tm,NULL);
       rob = KpoString(ctime((time_t *)&(tm.tv_sec)));
   }else if (strcmp(key,"defaultPolyRing")==0) {    }else if (strcmp(key,"defaultPolyRing")==0) {
     if (size != 2) errorKan1("%s\n","[(defaultPolyRing) n] extension.");      if (size != 2) errorKan1("%s\n","[(defaultPolyRing) n] extension.");
     rob = KdefaultPolyRing(getoa(obj,1));      rob = KdefaultPolyRing(getoa(obj,1));
Line 161  struct object Kextension(struct object obj)
Line 195  struct object Kextension(struct object obj)
     obj1 = getoa(obj,1);      obj1 = getoa(obj,1);
     if (obj1.tag != Sdollar) errorKan1("%s\n","[(getenv) envstr] extension");      if (obj1.tag != Sdollar) errorKan1("%s\n","[(getenv) envstr] extension");
     abc = getenv(KopString(obj1));      abc = getenv(KopString(obj1));
   #if defined(__CYGWIN__)
     if (abc == NULL) {      if (abc == NULL) {
             abc2 = (char *)sGC_malloc(sizeof(char)*(strlen(KopString(obj1))+2));
         strcpy(abc2,KopString(obj1));
             for (i=0; i<strlen(abc2); i++) {
                   abc2[i] = toupper(abc2[i]);
             }
         abc = getenv(abc2);
       }
   #endif
       if (abc == NULL) {
       rob = NullObject;        rob = NullObject;
     }else{      }else{
       abc2 = (char *)sGC_malloc(sizeof(char)*(strlen(abc)+2));        abc2 = (char *)sGC_malloc(sizeof(char)*(strlen(abc)+2));
Line 189  struct object Kextension(struct object obj)
Line 233  struct object Kextension(struct object obj)
       putoa(obj3,0,KpoInteger((int) buf.st_size));        putoa(obj3,0,KpoInteger((int) buf.st_size));
       putoa(rob,1,obj3); /* We have not yet read buf fully */        putoa(rob,1,obj3); /* We have not yet read buf fully */
     }      }
     }else if (strcmp(key,"gethostname")==0) {
       abc = (char *)sGC_malloc(sizeof(char)*1024);
       if (gethostname(abc,1023) < 0) {
             errorKan1("%s\n","hostname could not be obtained.");
           }
           rob = KpoString(abc);
   }else if (strcmp(key,"forkExec")==0) {    }else if (strcmp(key,"forkExec")==0) {
     if (size != 4) errorKan1("%s\n","[(forkExec) argList fdList sigblock] extension.");      if (size != 4) errorKan1("%s\n","[(forkExec) argList fdList sigblock] extension.");
     obj1 = getoa(obj,1);      obj1 = getoa(obj,1);
           if (obj1.tag == Sdollar) {
             obj1 = KstringToArgv(obj1);
           }
     if (obj1.tag != Sarray) errorKan1("%s\n","[(forkExec) argList fdList sigblock] extension. array argList.");      if (obj1.tag != Sarray) errorKan1("%s\n","[(forkExec) argList fdList sigblock] extension. array argList.");
     obj2 = getoa(obj,2);          obj2 = getoa(obj,2);
     if (obj2.tag != Sarray) errorKan1("%s\n","[(forkExec) argList fdList sigblock] extension. array fdList.");      if (obj2.tag != Sarray) errorKan1("%s\n","[(forkExec) argList fdList sigblock] extension. array fdList.");
     obj3 = getoa(obj,3);      obj3 = getoa(obj,3);
     if (obj3.tag != Sinteger) errorKan1("%s\n","[(forkExec) argList fdList sigblock] extension. integer sigblock.");      if (obj3.tag != Sinteger) errorKan1("%s\n","[(forkExec) argList fdList sigblock] extension. integer sigblock.");
Line 205  struct object Kextension(struct object obj)
Line 258  struct object Kextension(struct object obj)
       if (m&2) {        if (m&2) {
          /* Do not call singal to turn around a trouble on cygwin. BUG. */           /* Do not call singal to turn around a trouble on cygwin. BUG. */
       }else{        }else{
          signal(SIGCHLD,mywait); /* to kill Zombie */           mysignal(SIGCHLD,mywait); /* to kill Zombie */
       }        }
       Mychildren[Mycp++] = pid;        Mychildren[Mycp++] = pid;
       if (Mycp >= MYCP_SIZE-1) {        if (Mycp >= MYCP_SIZE-1) {
Line 244  struct object Kextension(struct object obj)
Line 297  struct object Kextension(struct object obj)
         sleep(5);          sleep(5);
         fprintf(stderr,">>>\n");          fprintf(stderr,">>>\n");
       }        }
       execv(argv[0],argv);        execve(argv[0],argv,environ);
       /* This place will never be reached unless execv fails. */        /* This place will never be reached unless execv fails. */
       fprintf(stderr,"forkExec fails: ");        fprintf(stderr,"forkExec fails: ");
       for (i=0; i<argListc; i++) {        for (i=0; i<argListc; i++) {
Line 274  struct object Kextension(struct object obj)
Line 327  struct object Kextension(struct object obj)
     printObject(obj2,0,fp);      printObject(obj2,0,fp);
     fclose(fp);      fclose(fp);
     rob = NullObject;      rob = NullObject;
     }else if (strcmp(key,"getAttributeList")==0) {
       if (size != 2) errorKan1("%s\n","[(getAttributeList) ob] extension rob");
       rob = KgetAttributeList(getoa(obj,1));
     }else if (strcmp(key,"setAttributeList")==0) {
       if (size != 3) errorKan1("%s\n","[(setAttributeList) ob attrlist] extension rob");
       rob = KsetAttributeList(getoa(obj,1), getoa(obj,2));
     }else if (strcmp(key,"getAttribute")==0) {
       if (size != 3) errorKan1("%s\n","[(getAttribute) ob key] extension rob");
       rob = KgetAttribute(getoa(obj,1),getoa(obj,2));
     }else if (strcmp(key,"setAttribute")==0) {
       if (size != 4) errorKan1("%s\n","[(setAttributeList) ob key value] extension rob");
       rob = KsetAttribute(getoa(obj,1), getoa(obj,2),getoa(obj,3));
   }else if (strcmp(key,"hilbert")==0) {    }else if (strcmp(key,"hilbert")==0) {
     if (size != 3) errorKan1("%s\n","[(hilbert) obgb obvlist] extension.");      if (size != 3) errorKan1("%s\n","[(hilbert) obgb obvlist] extension.");
     rob = hilberto(getoa(obj,1),getoa(obj,2));      rob = hilberto(getoa(obj,1),getoa(obj,2));
     }else if (strcmp(key,"nobody") == 0) {
         uid = getuid();
             if (uid == 0) {
   #define NOBODY 65534
                   /* If I'm a super user, then change uid to nobody. */
                   if (setuid(NOBODY) != 0) {
                     fprintf(stderr,"Failed to change uid to nobody (%d)\n",NOBODY);
                     exit(10);
                   }
                   fprintf(stderr,"uid is changed to nobody (%d).\n",NOBODY);
                   rob.tag = Snull;
             }
   }else if (strcmp(key,"chattr")==0) {    }else if (strcmp(key,"chattr")==0) {
     if (size != 3) errorKan1("%s\n","[(chattr)  num symbol] extension.");      if (size != 3) errorKan1("%s\n","[(chattr)  num symbol] extension.");
     obj1 = getoa(obj,1);      obj1 = getoa(obj,1);
Line 284  struct object Kextension(struct object obj)
Line 361  struct object Kextension(struct object obj)
     if (obj1.tag != Sinteger) errorKan1("%s\n","[(chattr)  num symbol] extension.");      if (obj1.tag != Sinteger) errorKan1("%s\n","[(chattr)  num symbol] extension.");
     if (obj2.tag != Sstring)  errorKan1("%s\n","[(chattr)  num symbol] extension.");      if (obj2.tag != Sstring)  errorKan1("%s\n","[(chattr)  num symbol] extension.");
     m = KopInteger(obj1);      m = KopInteger(obj1);
     if (!( m == 0 || m == PROTECT || m == ABSOLUTE_PROTECT))          /* if (!( m == 0 || m == PROTECT || m == ABSOLUTE_PROTECT || m == ATTR_INFIX))
       errorKan1("%s\n","The number must be 0, 1 or 2.");             errorKan1("%s\n","The number must be 0, 1 or 2.");*/
     putUserDictionary2(obj2.lc.str,(obj2.rc.op->lc).ival,(obj2.rc.op->rc).ival,      putUserDictionary2(obj2.lc.str,(obj2.rc.op->lc).ival,(obj2.rc.op->rc).ival,
                        m,CurrentContextp->userDictionary);                         m,CurrentContextp->userDictionary);
     }else if (strcmp(key,"or_attr")==0) {
       if (size != 3) errorKan1("%s\n","[(or_attr)  num symbol] extension.");
       obj1 = getoa(obj,1);
       obj2 = getoa(obj,2);
       if (obj1.tag != Sinteger) errorKan1("%s\n","[(or_attr)  num symbol] extension.");
       if (obj2.tag != Sstring)  errorKan1("%s\n","[(or_attr)  num symbol] extension.");
       m = KopInteger(obj1);
       rob = KfindUserDictionary(obj2.lc.str);
       if (rob.tag != NoObject.tag) {
         if (strcmp(UD_str,obj2.lc.str) == 0) {
           m |= UD_attr;
         }else errorKan1("%s\n","or_attr: internal error.");
       }
       rob = KpoInteger(m);
       putUserDictionary2(obj2.lc.str,(obj2.rc.op->lc).ival,(obj2.rc.op->rc).ival,
                          m,CurrentContextp->userDictionary);
     }else if (strcmp(key,"getattr")==0) {
       if (size != 2) errorKan1("%s\n","[(getattr) symbol] extension.");
       obj1 = getoa(obj,1);
       if (obj1.tag != Sstring)  errorKan1("%s\n","[(getattr) symbol] extension.");
       rob = KfindUserDictionary(obj1.lc.str);
           if (rob.tag != NoObject.tag) {
             if (strcmp(UD_str,obj1.lc.str) == 0) {
                   rob = KpoInteger(UD_attr);
             }else errorKan1("%s\n","getattr: internal error.");
           }else rob = NullObject;
     }else if (strcmp(key,"getServerEnv")==0) {
       if (size != 2) errorKan1("%s\n","[(getServerEnv) serverName] extension.");
       obj1 = getoa(obj,1);
       if (obj1.tag != Sdollar) errorKan1("%s\n","[(getServerEnv) serverName] extension.");
       {
         char **se; int ii; int nn;
             char **getServerEnv(char *);
         se = getServerEnv(KopString(obj1));
         if (se == NULL) {
           debugServerEnv(KopString(obj1));
           rob = NullObject;
         }else{
           for (ii=0,nn=0; se[ii] != NULL; ii++) nn++;
           rob = newObjectArray(nn);
           for (ii=0; ii<nn; ii++) {
             putoa(rob,ii,KpoString(se[ii]));
           }
         }
       }
     }else if (strcmp(key,"read")==0) {
       if (size != 3) errorKan1("%s\n","[(read) fd size] extension.");
       obj1 = getoa(obj,1);
       if (obj1.tag != Sinteger) errorKan1("%s\n","[(read) fd size] extension. fd must be an integer.");
       obj2 = getoa(obj,2);
       if (obj2.tag != Sinteger) errorKan1("%s\n","[(read) fd size] extension. size must be an integer.");
       {
         int total, n, fd;
         char *s; char *s0;
         fd = KopInteger(obj1);
         total = KopInteger(obj2);
         if (total <= 0) errorKan1("%s\n","[(read) ...]; negative size has not yet been implemented.");
         /* Return a string. todo: implement SbyteArray case. */
         s0 = s = (char *) sGC_malloc(total+1);
         if (s0 == NULL) errorKan1("%s\n","[(read) ...]; no more memory.");
         while (total >0) {
           n = read(fd, s, total);
           if (n < 0) { perror("read"); errorKan1("%s\n","[(read) ...]; read error.");}
           s[n] = 0;
           total -= n;  s = &(s[n]);
         }
         rob = KpoString(s0);
       }
     }else if (strcmp(key,"regionMatches")==0) {
       if (size != 3) errorKan1("%s\n","[(regionMatches) str strArray] extension.");
       obj1 = getoa(obj,1);
       if (obj1.tag != Sdollar) errorKan1("%s\n","[(regionMatches) str strArray] extension. str must be a string.");
           obj2 = getoa(obj,2);
       if (obj2.tag != Sarray) errorKan1("%s\n","[(regionMatches) str strArray] extension. strArray must be an array.");
       rob = KregionMatches(obj1,obj2);
     }else if (strcmp(key,"newVector")==0) {
       if (size != 2) errorKan1("%s\n","[(newVector) m] extension.");
       obj1 = getoa(obj,1);
       if (obj1.tag != Sinteger) errorKan1("%s\n","[(newVector) m] extension. m must be an integer.");
       rob = newObjectArray(KopInteger(obj1));
     }else if (strcmp(key,"newMatrix")==0) {
       if (size != 3) errorKan1("%s\n","[(newMatrix) m n] extension.");
       obj1 = getoa(obj,1);
       if (obj1.tag != Sinteger) errorKan1("%s\n","[(newMatrix) m n] extension. m must be an integer.");
           obj2 = getoa(obj,2);
       if (obj2.tag != Sinteger) errorKan1("%s\n","[(newMatrix) m n] extension. n must be an integer.");
       rob = newObjectArray(KopInteger(obj1));
           for (i=0; i<KopInteger(obj1); i++) {
         putoa(rob,i,newObjectArray(KopInteger(obj2)));
           }
     }else if (strcmp(key,"ooPower")==0) {
       if (size != 3) errorKan1("%s\n","[(ooPower) a b] extension.");
       obj1 = getoa(obj,1);
           obj2 = getoa(obj,2);
       rob = KooPower(obj1,obj2);
     }else if (strcmp(key,"Krest")==0) {
       if (size != 2) errorKan1("%s\n","[(Krest) a] extension b");
       obj1 = getoa(obj,1);
       rob = Krest(obj1);
     }else if (strcmp(key,"Kjoin")==0) {
       if (size != 3) errorKan1("%s\n","[(Kjoin) a b] extension c");
       obj1 = getoa(obj,1);
           obj2 = getoa(obj,2);
       rob = Kjoin(obj1,obj2);
   }else if (strcmp(key,"ostype")==0) {    }else if (strcmp(key,"ostype")==0) {
     rob = newObjectArray(1);      /* Hard encode the OS type.  cpp -dM /dev/null */
     /* Hard encode the OS type. */  
 #if defined(__CYGWIN__)  #if defined(__CYGWIN__)
       rob = newObjectArray(1);
     putoa(rob,0,KpoString("windows"));      putoa(rob,0,KpoString("windows"));
 #else  #else
       rob = newObjectArray(2);
     putoa(rob,0,KpoString("unix"));      putoa(rob,0,KpoString("unix"));
   #if defined(__APPLE__)
       putoa(rob,1,KpoString("mac"));
   #else
       putoa(rob,1,KpoString("generic"));
 #endif  #endif
   #endif
     }else if (strcmp(key,"stringToArgv")==0) {
       if (size != 2) errorKan1("%s\n","[(stringToArgv) a ] extension b");
           obj1 = getoa(obj,1);
           if (obj1.tag != Sdollar) errorKan1("%s\n","[(stringToArgv) a ] extension b,  a must be a string.");
       rob = KstringToArgv(obj1);
     }else if (strcmp(key,"stringToArgv2")==0) {
       if (size != 3) errorKan1("%s\n","[(stringToArgv2) str separator] extension b");
           obj1 = getoa(obj,1);
           obj2 = getoa(obj,2);
       rob = KstringToArgv2(obj1,obj2);
     }else if (strcmp(key,"traceClearStack")==0) {
       traceClearStack();
       rob = NullObject;
     }else if (strcmp(key,"traceShowStack")==0) {
       char *ssst;
       ssst = traceShowStack();
       if (ssst != NULL) {
         rob = KpoString(ssst);
       }else{
         rob = NullObject;
       }
     }else if (strcmp(key,"traceShowScannerBuf")==0) {
       char *ssst;
       ssst = MsgSourceTrace;
       if (ssst != NULL) {
         rob = KpoString(ssst);
       }else{
         rob = NullObject;
       }
     }else if (strcmp(key,"regexec")==0) {
       if ((size != 3) && (size != 4)) errorKan1("%s\n","[(regexec) reg strArray flag(optional)] extension b");
       obj1 = getoa(obj,1);
       if (obj1.tag != Sdollar) errorKan1("%s\n","regexec, the first argument should be a string (regular expression).");
       obj2 = getoa(obj,2);
       if (obj2.tag != Sarray) errorKan1("%s\n","regexec, the second argument should be an array of a string.");
       if (size == 3) obj3 = newObjectArray(0);
       else obj3 = getoa(obj,3);
       rob = oregexec(obj1,obj2,obj3);
     }else if (strcmp(key,"unlink")==0) {
       if (size != 2) errorKan1("%s\n","[(unlink) filename] extension b");
       obj1 = getoa(obj,1);
       if (obj1.tag != Sdollar) errorKan1("%s\n","unlink, the first argument should be a string (filename).");
       rob = KpoInteger(oxDeleteFile(KopString(obj1)));
     }else if (strcmp(key,"quiet")==0) {
       obj1 = getoa(obj,1);
       if (obj1.tag != Sinteger) errorKan1("%s\n","quiet, the first argument should be an integer.");
       Quiet = KopInteger(obj1);
       rob = obj1;
   }    }
 #include "plugin.hh"  #include "plugin.hh"
   #include "Kclass/tree.hh"
   else{    else{
     errorKan1("%s\n","Unknown tag for extension.");          fprintf(stderr,"key=%s; ",key);
       errorKan1("%s\n","Unknown key for extension.");
   }    }
   
   
   return(rob);    return(rob);
 }  }
   
   struct object KregionMatches(struct object sobj, struct object keyArray)
   {
     struct object rob = OINIT;
     int n,i,j,m,keyn;
     char *s,*key;
     rob = newObjectArray(3);
     getoa(rob,0) = KpoInteger(-1);
     getoa(rob,1) = NullObject;
     getoa(rob,2) = NullObject;
   
     if (sobj.tag != Sdollar) return rob;
     if (keyArray.tag != Sarray) return rob;
     n = getoaSize(keyArray);
     for (i=0; i<n; i++) {
           if (getoa(keyArray,i).tag != Sdollar) { return rob; }
     }
   
     s = KopString(sobj);
     m = strlen(s);
   
     for (i=0; i<n; i++) {
           key = KopString(getoa(keyArray,i));
           keyn = strlen(key);
           for (j=0; j<m; j++) {
             if (strncmp(&(s[j]),key,keyn) == 0) {
                   getoa(rob,0) = KpoInteger(j);
                   getoa(rob,1) = KpoString(key);
                   getoa(rob,2) = KpoInteger(i);
                   return rob;
             }
           }
     }
     return rob;
   }
   
   static struct object oregexec(struct object oregex,struct object ostrArray,struct object oflag) {
     struct object rob = OINIT;
     struct object ob = OINIT;
     int n,i,j,m,keyn,cflag,eflag,er;
     char *regex;
     regex_t preg;
     char *s;
     char *mbuf; int mbufSize;
   #define REGMATCH_SIZE 100
     regmatch_t pmatch[100]; size_t nmatch;
     int size;
   
     nmatch = (size_t) REGMATCH_SIZE;
     rob = newObjectArray(0);
     mbufSize = 1024;
   
     if (oregex.tag != Sdollar) return rob;
     if (ostrArray.tag != Sarray) return rob;
     n = getoaSize(ostrArray);
     for (i=0; i<n; i++) {
       if (getoa(ostrArray,i).tag != Sdollar) { return rob; }
     }
     if (oflag.tag != Sarray) errorKan1("%s\n","oregexec: oflag should be an array of integers.");
     cflag = eflag = 0;
     oflag = Kto_int32(oflag);
     for (i=0; i<getoaSize(oflag); i++) {
       ob = getoa(oflag,i);
       if (ob.tag != Sinteger) errorKan1("%s\n","oregexec: oflag is not an array of integers.");
       if (i == 0) cflag = KopInteger(ob);
       if (i == 1) eflag = KopInteger(ob);
     }
   
     regex = KopString(oregex);
     if (er=regcomp(&preg,regex,cflag)) {
       mbuf = (char *) sGC_malloc(mbufSize);
       if (mbuf == NULL) errorKan1("%s\n","No more memory.");
       regerror(er,&preg,mbuf,mbufSize-1);
       errorKan1("regcomp error: %s\n",mbuf);
     }
   
     size = 0; /* We should use list instead of counting the size. */
     for (i=0; i<n; i++) {
       s = KopString(getoa(ostrArray,i));
       er=regexec(&preg,s,nmatch,pmatch,eflag);
       if ((er != 0) && (er != REG_NOMATCH)) {
         mbuf = (char *) sGC_malloc(mbufSize);
         if (mbuf == NULL) errorKan1("%s\n","No more memory.");
         regerror(er,&preg,mbuf,mbufSize-1);
         errorKan1("regcomp error: %s\n",mbuf);
       }
       if (er == 0) size++;
     }
   
     rob = newObjectArray(size);
     size = 0;
     for (i=0; i<n; i++) {
       s = KopString(getoa(ostrArray,i));
       er=regexec(&preg,s,nmatch,pmatch,eflag);
       if ((er != 0) && (er != REG_NOMATCH)) {
         mbuf = (char *) sGC_malloc(mbufSize);
         if (mbuf == NULL) errorKan1("%s\n","No more memory.");
         regerror(er,&preg,mbuf,mbufSize-1);
         errorKan1("regcomp error: %s\n",mbuf);
       }
       if (er == 0) {
         ob = newObjectArray(3);
         putoa(ob,0,KpoString(s));
         /* temporary */
         putoa(ob,1,KpoInteger((int) (pmatch[0].rm_so)));
         putoa(ob,2,KpoInteger((int) (pmatch[0].rm_eo)));
         putoa(rob,size,ob);
         size++;
       }
     }
     regfree(&preg);
     return rob;
   }
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