Logo Search packages:      
Sourcecode: openssl version File versions

txt_db.c

/* crypto/txt_db/txt_db.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/txt_db.h>

#undef BUFSIZE
#define BUFSIZE   512

const char *TXT_DB_version="TXT_DB" OPENSSL_VERSION_PTEXT;

TXT_DB *TXT_DB_read(BIO *in, int num)
      {
      TXT_DB *ret=NULL;
      int er=1;
      int esc=0;
      long ln=0;
      int i,add,n;
      int size=BUFSIZE;
      int offset=0;
      char *p,**pp,*f;
      BUF_MEM *buf=NULL;

      if ((buf=BUF_MEM_new()) == NULL) goto err;
      if (!BUF_MEM_grow(buf,size)) goto err;

      if ((ret=(TXT_DB *)OPENSSL_malloc(sizeof(TXT_DB))) == NULL)
            goto err;
      ret->num_fields=num;
      ret->index=NULL;
      ret->qual=NULL;
      if ((ret->data=sk_new_null()) == NULL)
            goto err;
      if ((ret->index=(LHASH **)OPENSSL_malloc(sizeof(LHASH *)*num)) == NULL)
            goto err;
      if ((ret->qual=(int (**)(char **))OPENSSL_malloc(sizeof(int (**)(char **))*num)) == NULL)
            goto err;
      for (i=0; i<num; i++)
            {
            ret->index[i]=NULL;
            ret->qual[i]=NULL;
            }

      add=(num+1)*sizeof(char *);
      buf->data[size-1]='\0';
      offset=0;
      for (;;)
            {
            if (offset != 0)
                  {
                  size+=BUFSIZE;
                  if (!BUF_MEM_grow_clean(buf,size)) goto err;
                  }
            buf->data[offset]='\0';
            BIO_gets(in,&(buf->data[offset]),size-offset);
            ln++;
            if (buf->data[offset] == '\0') break;
            if ((offset == 0) && (buf->data[0] == '#')) continue;
            i=strlen(&(buf->data[offset]));
            offset+=i;
            if (buf->data[offset-1] != '\n')
                  continue;
            else
                  {
                  buf->data[offset-1]='\0'; /* blat the '\n' */
                  if (!(p=(char *)OPENSSL_malloc(add+offset))) goto err;
                  offset=0;
                  }
            pp=(char **)p;
            p+=add;
            n=0;
            pp[n++]=p;
            i=0;
            f=buf->data;

            esc=0;
            for (;;)
                  {
                  if (*f == '\0') break;
                  if (*f == '\t')
                        {
                        if (esc)
                              p--;
                        else
                              {     
                              *(p++)='\0';
                              f++;
                              if (n >=  num) break;
                              pp[n++]=p;
                              continue;
                              }
                        }
                  esc=(*f == '\\');
                  *(p++)= *(f++);
                  }
            *(p++)='\0';
            if ((n != num) || (*f != '\0'))
                  {
#if !defined(OPENSSL_NO_STDIO) && !defined(OPENSSL_SYS_WIN16)     /* temporaty fix :-( */
                  fprintf(stderr,"wrong number of fields on line %ld (looking for field %d, got %d, '%s' left)\n",ln,num,n,f);
#endif
                  er=2;
                  goto err;
                  }
            pp[n]=p;
            if (!sk_push(ret->data,(char *)pp))
                  {
#if !defined(OPENSSL_NO_STDIO) && !defined(OPENSSL_SYS_WIN16)     /* temporaty fix :-( */
                  fprintf(stderr,"failure in sk_push\n");
#endif
                  er=2;
                  goto err;
                  }
            }
      er=0;
err:
      BUF_MEM_free(buf);
      if (er)
            {
#if !defined(OPENSSL_NO_STDIO) && !defined(OPENSSL_SYS_WIN16)
            if (er == 1) fprintf(stderr,"OPENSSL_malloc failure\n");
#endif
            if (ret != NULL)
                  {
                  if (ret->data != NULL) sk_free(ret->data);
                  if (ret->index != NULL) OPENSSL_free(ret->index);
                  if (ret->qual != NULL) OPENSSL_free(ret->qual);
                  if (ret != NULL) OPENSSL_free(ret);
                  }
            return(NULL);
            }
      else
            return(ret);
      }

char **TXT_DB_get_by_index(TXT_DB *db, int idx, char **value)
      {
      char **ret;
      LHASH *lh;

      if (idx >= db->num_fields)
            {
            db->error=DB_ERROR_INDEX_OUT_OF_RANGE;
            return(NULL);
            }
      lh=db->index[idx];
      if (lh == NULL)
            {
            db->error=DB_ERROR_NO_INDEX;
            return(NULL);
            }
      ret=(char **)lh_retrieve(lh,value);
      db->error=DB_ERROR_OK;
      return(ret);
      }

int TXT_DB_create_index(TXT_DB *db, int field, int (*qual)(char **),
            LHASH_HASH_FN_TYPE hash, LHASH_COMP_FN_TYPE cmp)
      {
      LHASH *idx;
      char **r;
      int i,n;

      if (field >= db->num_fields)
            {
            db->error=DB_ERROR_INDEX_OUT_OF_RANGE;
            return(0);
            }
      if ((idx=lh_new(hash,cmp)) == NULL)
            {
            db->error=DB_ERROR_MALLOC;
            return(0);
            }
      n=sk_num(db->data);
      for (i=0; i<n; i++)
            {
            r=(char **)sk_value(db->data,i);
            if ((qual != NULL) && (qual(r) == 0)) continue;
            if ((r=lh_insert(idx,r)) != NULL)
                  {
                  db->error=DB_ERROR_INDEX_CLASH;
                  db->arg1=sk_find(db->data,(char *)r);
                  db->arg2=i;
                  lh_free(idx);
                  return(0);
                  }
            }
      if (db->index[field] != NULL) lh_free(db->index[field]);
      db->index[field]=idx;
      db->qual[field]=qual;
      return(1);
      }

long TXT_DB_write(BIO *out, TXT_DB *db)
      {
      long i,j,n,nn,l,tot=0;
      char *p,**pp,*f;
      BUF_MEM *buf=NULL;
      long ret= -1;

      if ((buf=BUF_MEM_new()) == NULL)
            goto err;
      n=sk_num(db->data);
      nn=db->num_fields;
      for (i=0; i<n; i++)
            {
            pp=(char **)sk_value(db->data,i);

            l=0;
            for (j=0; j<nn; j++)
                  {
                  if (pp[j] != NULL)
                        l+=strlen(pp[j]);
                  }
            if (!BUF_MEM_grow_clean(buf,(int)(l*2+nn))) goto err;

            p=buf->data;
            for (j=0; j<nn; j++)
                  {
                  f=pp[j];
                  if (f != NULL)
                        for (;;) 
                              {
                              if (*f == '\0') break;
                              if (*f == '\t') *(p++)='\\';
                              *(p++)= *(f++);
                              }
                  *(p++)='\t';
                  }
            p[-1]='\n';
            j=p-buf->data;
            if (BIO_write(out,buf->data,(int)j) != j)
                  goto err;
            tot+=j;
            }
      ret=tot;
err:
      if (buf != NULL) BUF_MEM_free(buf);
      return(ret);
      }

int TXT_DB_insert(TXT_DB *db, char **row)
      {
      int i;
      char **r;

      for (i=0; i<db->num_fields; i++)
            {
            if (db->index[i] != NULL)
                  {
                  if ((db->qual[i] != NULL) &&
                        (db->qual[i](row) == 0)) continue;
                  r=(char **)lh_retrieve(db->index[i],row);
                  if (r != NULL)
                        {
                        db->error=DB_ERROR_INDEX_CLASH;
                        db->arg1=i;
                        db->arg_row=r;
                        goto err;
                        }
                  }
            }
      /* We have passed the index checks, now just append and insert */
      if (!sk_push(db->data,(char *)row))
            {
            db->error=DB_ERROR_MALLOC;
            goto err;
            }

      for (i=0; i<db->num_fields; i++)
            {
            if (db->index[i] != NULL)
                  {
                  if ((db->qual[i] != NULL) &&
                        (db->qual[i](row) == 0)) continue;
                  lh_insert(db->index[i],row);
                  }
            }
      return(1);
err:
      return(0);
      }

void TXT_DB_free(TXT_DB *db)
      {
      int i,n;
      char **p,*max;

      if(db == NULL)
          return;

      if (db->index != NULL)
            {
            for (i=db->num_fields-1; i>=0; i--)
                  if (db->index[i] != NULL) lh_free(db->index[i]);
            OPENSSL_free(db->index);
            }
      if (db->qual != NULL)
            OPENSSL_free(db->qual);
      if (db->data != NULL)
            {
            for (i=sk_num(db->data)-1; i>=0; i--)
                  {
                  /* check if any 'fields' have been allocated
                   * from outside of the initial block */
                  p=(char **)sk_value(db->data,i);
                  max=p[db->num_fields]; /* last address */
                  if (max == NULL) /* new row */
                        {
                        for (n=0; n<db->num_fields; n++)
                              if (p[n] != NULL) OPENSSL_free(p[n]);
                        }
                  else
                        {
                        for (n=0; n<db->num_fields; n++)
                              {
                              if (((p[n] < (char *)p) || (p[n] > max))
                                    && (p[n] != NULL))
                                    OPENSSL_free(p[n]);
                              }
                        }
                  OPENSSL_free(sk_value(db->data,i));
                  }
            sk_free(db->data);
            }
      OPENSSL_free(db);
      }

Generated by  Doxygen 1.6.0   Back to index