/**
 * Implementation file for the exe buffer buffer handling system.
 *
 * copyright: see file COPYRIGHT
 *
 * More information in exe.tex
 *
 * Mark Koennecke, November 2004
 */

#include <stdio.h>
#include <assert.h>
#include <tcl.h>
#include "lld_str.h"
#include "fortify.h"
#include "sics.h"
#include "exebuf.h"
#include "dynstring.h"
#include "exebuf.i"
#include "status.h"

/*-----------------------------------------------------------------------*/
pExeBuf exeBufCreate(char *name){
  pExeBuf pNew = NULL;

  pNew = (pExeBuf)malloc(sizeof(ExeBuf));
  if(pNew == NULL){
    return NULL;
  }
  memset(pNew,0,sizeof(ExeBuf));
  pNew->name = strdup(name);
  pNew->bufferContent = CreateDynString(1024,1024);
  if(!pNew->bufferContent){
    return NULL;
  }
  return pNew;
}
/*----------------------------------------------------------------------*/
void exeBufKill(void *data){
  exeBufDelete((pExeBuf)data);
}
/*-----------------------------------------------------------------------*/
void exeBufDelete(pExeBuf self){
  if(self == NULL){
    return;
  }
  if(self->name != NULL){
    free(self->name);
    self->name = NULL;
  }
  if(self->bufferContent != NULL){
    DeleteDynString(self->bufferContent);
    self->bufferContent = NULL;
  }
  free(self);
}
/*----------------------------------------------------------------------*/
int exeBufAppend(pExeBuf self, char *line){
  int status;
  assert(self);

  status = DynStringConcat(self->bufferContent,line);
  if(strrchr(line,(int)'\n') == NULL){ 
    DynStringConcatChar(self->bufferContent,'\n');
  }
  return status;
}
/*-----------------------------------------------------------------------*/
static char *locateName(char *filename){
  char *pPtr;
  int i;

  pPtr = filename + strlen(filename) -1;
  for(i = strlen(filename) -1; i > 0; i--,pPtr--){
    if(*pPtr == '/'){
      pPtr++;
      return pPtr;
    }
  }
  return filename;
}
/*-----------------------------------------------------------------------*/
int exeBufLoad(pExeBuf self, char *filename){
  char line[256];
  FILE *fd = NULL;
  int status;

  assert(self);
  fd = fopen(filename,"r");
  if(fd == NULL){
    return 0;
  }
  while(fgets(line,255,fd) != NULL){
    status = exeBufAppend(self,line);
    if(status != 1){
      fclose(fd);
      return 0;
    }
  }
  fclose(fd);
  if(self->name != NULL){
    free(self->name);
  }
  self->name = strdup(locateName(filename));
  return 1;
}
/*----------------------------------------------------------------------*/
int exeBufSave(pExeBuf self, char *filename){
  FILE *fd = NULL;

  fd = fopen(filename,"w");
  if(fd == NULL){
    return 0;
  }
  fputs(GetCharArray(self->bufferContent),fd);
  fclose(fd);
  self->name = strdup(locateName(filename));
  return 1;
}
/*================ process batch buffer ==============================*/
static pDynString  findBlockEnd(pExeBuf self){
  pDynString command = NULL;
  char *buffer = NULL;
  int i;

  assert(self);

  command = CreateDynString(80,80);
  if(command == NULL){
    return NULL;
  }
  buffer = GetCharArray(self->bufferContent);
  if(self->end != -1){
    self->start = self->end + 1;
  }
  for(i = self->start; i < strlen(buffer); i++){
    DynStringConcatChar(command,buffer[i]);
    if(buffer[i] == '\n'){
      self->lineno++;
      if(Tcl_CommandComplete(GetCharArray(command))){
	self->end = i;
	return command;
      }
    }
  }
  DeleteDynString(command);
  return NULL;
}
/*---------------------------------------------------------------------*/
int exeBufProcess(pExeBuf self, SicsInterp *pSics, 
		    SConnection *pCon, pICallBack pCall, int echo){
  pDynString command = NULL;
  Tcl_Interp *pTcl = NULL;
  int status;
  
  static int weWantLogging = 1;
  char *cmd;
  char cmdName[128];
  char *ende;
  int l;
  
  assert(self);
  assert(pSics);

  self->start = 0;
  self->end = -1;
  self->lineno = 0;
  pTcl = InterpGetTcl(pSics);

  if(pCall != NULL){
      InvokeCallBack(pCall,BATCHSTART,self->name);
  }
  
  if (echo) {
    SCsetMacro(pCon,0);
  }
  while((command = findBlockEnd(self)) != NULL){
    if(pCall != NULL){
        InvokeCallBack(pCall,BATCHAREA,NULL);
    }
    cmd = GetCharArray(command);
    
    if (echo) {
      /* find first word */
      while (*cmd == ' ') {
        cmd++;
      }
      ende = cmd;
      while (*ende > ' ') {
        ende++;
      }
      l = ende - cmd;
      if (l < sizeof cmdName) {
        strncpy(cmdName, cmd, l);
        cmdName[l] = '\0';
        if (FindCommand(pSics, cmdName) != NULL) {
          /* print only SICS commands */ 
          SCPrintf(pCon, eValue, "%s:%d>> %s",self->name,self->lineno,cmd);
        }
      }
    }
    
    status = Tcl_Eval(pTcl,cmd);
    if(status != TCL_OK){
      if(pCon->sicsError == 0){
	/*
	  Tcl Error
	*/
	if(strlen(pTcl->result) >= 2){
	  SCWrite(pCon,pTcl->result,eError);
        }
	SCWrite(pCon,"ERROR: Tcl error in block:",eError);
	SCWrite(pCon,GetCharArray(command),eError);
	SCWrite(pCon,"ERROR: end of Tcl error block",eError);
      } else {
	/*
	  SICS error: has already been reported
	*/
	pCon->sicsError = 0;
      }
    }
    DeleteDynString(command);
    if(SCGetInterrupt(pCon) >= eAbortBatch){
      SCWrite(pCon,"ERROR: batch processing interrupted",eError);
      SetStatus(eEager);
      return 0;
    } else {
      SCSetInterrupt(pCon,eContinue);
    }
  }
  if(pCall != NULL){
      InvokeCallBack(pCall,BATCHEND,self->name);
  }
  return 1;
}
/*---------------------------------------------------------------------*/
int exeBufProcessErrList(pExeBuf self, SicsInterp *pSics, 
            SConnection *pCon, int errList){
  pDynString command = NULL;
  Tcl_Interp *pTcl = NULL;
  int status;
  
  static int weWantLogging = 1;
  char *cmd;
  char cmdName[128];
  char *error;
  char msg[132];
  char *ende;
  int l;
  
  assert(self);
  assert(pSics);

  self->start = 0;
  self->end = -1;
  self->lineno = 0;
  pTcl = InterpGetTcl(pSics);

  while((command = findBlockEnd(self)) != NULL){
    cmd = GetCharArray(command);
        
    status = Tcl_Eval(pTcl,cmd);
    if(status != TCL_OK){
        LLDstringAppend(errList,cmd);
        error = (char *)Tcl_GetStringResult(pTcl);
        snprintf(msg, sizeof msg, "#ERR: %s\n", error);
        LLDstringAppend(errList,msg);
    }
    DeleteDynString(command);
    if(SCGetInterrupt(pCon) >= eAbortBatch){
      SCWrite(pCon,"ERROR: batch processing interrupted",eError);
      SetStatus(eEager);
      return 0;
    } else {
      SCSetInterrupt(pCon,eContinue);
    }
  }
  return 1;
}
/*------------------------------------------------------------------------*/
void exeBufRange(pExeBuf self, int *start, int *end, int *lineno){
  assert(self);
  *start = self->start;
  *end = self->end;
  *lineno = self->lineno;
}
/*------------------------------------------------------------------------*/
pDynString exeBufText(pExeBuf self, int start, int end){
  pDynString result = NULL;
  char *pPtr;
  int i;

  assert(self);
  
  result = CreateDynString(256,132);
  if(result == NULL){
    return NULL;
  }

  pPtr = GetCharArray(self->bufferContent);
  if(end >= strlen(pPtr)){
    end = strlen(pPtr) -1;
  }
  for(i = start; i < end; i++){
    DynStringConcatChar(result,pPtr[i]);
  } 
  return result;
}
/*-----------------------------------------------------------------------*/
char *exeBufName(pExeBuf self){
  assert(self);
  return self->name;
}