SQLite

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code to implement the "sqlite" command line
** utility for accessing SQLite databases.
**
** $Id: shell.c,v 1.152 2006/10/26 18:15:42 drh Exp $
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include "sqlite3.h"
#include <ctype.h>

# include <io.h>
#else
/* Make sure isatty() has a prototype.
*/
extern int isatty();
#endif

/*
** If the following flag is set, then command execution stops
** at an error if we are not interactive.
*/
static int bail_on_error = 0;

/*
** Threat stdin as an interactive input if the following variable
** is true.  Otherwise, assume stdin is connected to a file or pipe.
*/
static int stdin_is_interactive = 1;

/*

    }else{
      break;
    }
    z += i + 1;
  }
}

/*
** If a field contains any character identified by a 1 in the following
** array, then the string must be quoted for CSV.
*/
static const char needCsvQuote[] = {
  1, 1, 1, 1, 1, 1, 1, 1,   1, 1, 1, 1, 1, 1, 1, 1,   
  1, 1, 1, 1, 1, 1, 1, 1,   1, 1, 1, 1, 1, 1, 1, 1,   
  1, 0, 1, 0, 0, 0, 0, 1,   0, 0, 0, 0, 0, 0, 0, 0, 
  0, 0, 0, 0, 0, 0, 0, 0,   0, 0, 0, 0, 0, 0, 0, 0, 
  0, 0, 0, 0, 0, 0, 0, 0,   0, 0, 0, 0, 0, 0, 0, 0, 
  0, 0, 0, 0, 0, 0, 0, 0,   0, 0, 0, 0, 0, 0, 0, 0, 
  0, 0, 0, 0, 0, 0, 0, 0,   0, 0, 0, 0, 0, 0, 0, 0, 
  0, 0, 0, 0, 0, 0, 0, 0,   0, 0, 0, 0, 0, 0, 0, 1, 
  1, 1, 1, 1, 1, 1, 1, 1,   1, 1, 1, 1, 1, 1, 1, 1,   
  1, 1, 1, 1, 1, 1, 1, 1,   1, 1, 1, 1, 1, 1, 1, 1,   
  1, 1, 1, 1, 1, 1, 1, 1,   1, 1, 1, 1, 1, 1, 1, 1,   
  1, 1, 1, 1, 1, 1, 1, 1,   1, 1, 1, 1, 1, 1, 1, 1,   
  1, 1, 1, 1, 1, 1, 1, 1,   1, 1, 1, 1, 1, 1, 1, 1,   
  1, 1, 1, 1, 1, 1, 1, 1,   1, 1, 1, 1, 1, 1, 1, 1,   
  1, 1, 1, 1, 1, 1, 1, 1,   1, 1, 1, 1, 1, 1, 1, 1,   
  1, 1, 1, 1, 1, 1, 1, 1,   1, 1, 1, 1, 1, 1, 1, 1,   
};

/*
** Output a single term of CSV.  Actually, p->separator is used for
** the separator, which may or may not be a comma.  p->nullvalue is
** the null value.  Strings are quoted using ANSI-C rules.  Numbers
** appear outside of quotes.
*/
static void output_csv(struct callback_data *p, const char *z, int bSep){
  FILE *out = p->out;
  if( z==0 ){
    fprintf(out,"%s",p->nullvalue);
  }else{
    int i;
    for(i=0; z[i]; i++){
      if( needCsvQuote[((unsigned char*)z)[i]] ){
        i = 0;
        break;
      }
    }
    if( i==0 ){
      putc('"', out);
      for(i=0; z[i]; i++){
        if( z[i]=='"' ) putc('"', out);
        putc(z[i], out);
      }
      putc('"', out);
    }else{
      fprintf(out, "%s", z);
    }
  }
  if( bSep ){
    fprintf(p->out, p->separator);
  }
}

#ifdef SIGINT

  }

  /* Process the input line.
  */
  if( nArg==0 ) return rc;
  n = strlen(azArg[0]);
  c = azArg[0][0];
  if( c=='b' && n>1 && strncmp(azArg[0], "bail", n)==0 && nArg>1 ){
    bail_on_error = booleanValue(azArg[1]);
  }else

  if( c=='d' && n>1 && strncmp(azArg[0], "databases", n)==0 ){
    struct callback_data data;
    char *zErrMsg = 0;
    open_db(p);
    memcpy(&data, p, sizeof(data));
    data.showHeader = 1;
    data.mode = MODE_Column;

** Return the number of errors.
*/
static int process_input(struct callback_data *p, FILE *in){
  char *zLine;
  char *zSql = 0;
  int nSql = 0;
  char *zErrMsg;
  int rc;
  int errCnt = 0;
  int lineno = 0;
  int startline = 0;

  while( errCnt==0 || !bail_on_error || (in==0 && stdin_is_interactive) ){
    fflush(p->out);
    zLine = one_input_line(zSql, in);
    if( zLine==0 ){
      break;  /* We have reached EOF */
    }
    if( seenInterrupt ){
      if( in!=0 ) break;
      seenInterrupt = 0;
    }



    lineno++;
    if( p->echoOn ) printf("%s\n", zLine);
    if( (zSql==0 || zSql[0]==0) && _all_whitespace(zLine) ) continue;
    if( zLine && zLine[0]=='.' && nSql==0 ){
      rc = do_meta_command(zLine, p);
      free(zLine);
      if( rc ){
        errCnt++;
      }
      continue;
    }
    if( _is_command_terminator(zLine) ){
      strcpy(zLine,";");
    }
    if( zSql==0 ){
      int i;

        if( zErrMsg!=0 ){
          printf("%s %s\n", zPrefix, zErrMsg);
          sqlite3_free(zErrMsg);
          zErrMsg = 0;
        }else{
          printf("%s %s\n", zPrefix, sqlite3_errmsg(p->db));
        }
        errCnt++;
      }
      free(zSql);
      zSql = 0;
      nSql = 0;
    }
  }
  if( zSql ){
    if( !_all_whitespace(zSql) ) printf("Incomplete SQL: %s\n", zSql);
    free(zSql);
  }
  return errCnt;
}

/*
** Return a pathname which is the user's home directory.  A
** 0 return indicates an error of some kind.  Space to hold the
** resulting string is obtained from malloc().  The calling
** function should free the result.

/*
** Show available command line options
*/
static const char zOptions[] = 
  "   -init filename       read/process named file\n"
  "   -echo                print commands before execution\n"
  "   -[no]header          turn headers on or off\n"
  "   -bail                stop after hitting an error\n"
  "   -interactive         force interactive I/O\n"
  "   -batch               force batch I/O\n"
  "   -column              set output mode to 'column'\n"
  "   -csv                 set output mode to 'csv'\n"
  "   -html                set output mode to HTML\n"
  "   -line                set output mode to 'line'\n"
  "   -list                set output mode to 'list'\n"
  "   -separator 'x'       set output field separator (|)\n"
  "   -nullvalue 'text'    set text string for NULL values\n"
  "   -version             show SQLite version\n"
;

      data.mode = MODE_Html;
    }else if( strcmp(z,"-list")==0 ){
      data.mode = MODE_List;
    }else if( strcmp(z,"-line")==0 ){
      data.mode = MODE_Line;
    }else if( strcmp(z,"-column")==0 ){
      data.mode = MODE_Column;
    }else if( strcmp(z,"-csv")==0 ){
      data.mode = MODE_Csv;
      strcpy(data.separator,",");
    }else if( strcmp(z,"-separator")==0 ){
      i++;
      sprintf(data.separator,"%.*s",(int)sizeof(data.separator)-1,argv[i]);
    }else if( strcmp(z,"-nullvalue")==0 ){
      i++;
      sprintf(data.nullvalue,"%.*s",(int)sizeof(data.nullvalue)-1,argv[i]);
    }else if( strcmp(z,"-header")==0 ){
      data.showHeader = 1;
    }else if( strcmp(z,"-noheader")==0 ){
      data.showHeader = 0;
    }else if( strcmp(z,"-echo")==0 ){
      data.echoOn = 1;
    }else if( strcmp(z,"-bail")==0 ){
      bail_on_error = 1;
    }else if( strcmp(z,"-version")==0 ){
      printf("%s\n", sqlite3_libversion());
      return 0;
    }else if( strcmp(z,"-interactive")==0 ){
      stdin_is_interactive = 1;
    }else if( strcmp(z,"-batch")==0 ){
      stdin_is_interactive = 0;