git.sur5r.net Git - openldap/blob - servers/slapd/back-sql/util.c

   1 /*
   2  *       Copyright 1999, Dmitry Kovalev <mit@openldap.org>, All rights reserved.
   3  *
   4  *       Redistribution and use in source and binary forms are permitted only
   5  *       as authorized by the OpenLDAP Public License.  A copy of this
   6  *       license is available at http://www.OpenLDAP.org/license.html or
   7  *       in file LICENSE in the top-level directory of the distribution.
   8  */
   9
  10 #include "portable.h"
  11
  12 #ifdef SLAPD_SQL
  13
  14 #include <stdio.h>
  15 #include <sys/types.h>
  16 #include <string.h>
  17 #include <stdarg.h>
  18 #include "slap.h"
  19 #include "back-sql.h"
  20 #include "util.h"
  21
  22
  23 char backsql_def_oc_query[]="SELECT id,name,keytbl,keycol,create_proc,delete_proc,expect_return FROM ldap_objclasses";
  24 char backsql_def_at_query[]="SELECT name,sel_expr,from_tbls,join_where,add_proc,modify_proc,delete_proc,param_order,expect_return FROM ldap_attrs WHERE oc_id=?";
  25 char backsql_def_delentry_query[]="DELETE FROM ldap_entries WHERE id=?";
  26 char backsql_def_insentry_query[]="INSERT INTO ldap_entries (dn,objclass,parent,keyval) VALUES (?,?,?,?)";
  27 char backsql_def_subtree_cond[]="ldap_entries.dn LIKE CONCAT('%',?)";
  28 char backsql_id_query[]="SELECT id,keyval,objclass FROM ldap_entries WHERE ";
  29
  30
  31 char* backsql_strcat(char* dest,int *buflen, ...)
  32 {
  33  va_list strs;
  34  int cdlen,cslen,grow;
  35  char *cstr;
  36
  37  //Debug(LDAP_DEBUG_TRACE,"==>my_strcat()\n");
  38  va_start(strs,buflen);
  39  if (dest==NULL || *buflen<=0)
  40   {
  41    dest=(char*)ch_calloc(BACKSQL_STR_GROW,sizeof(char));
  42    *buflen=BACKSQL_STR_GROW;
  43   }
  44  cdlen=strlen(dest)+1;
  45  while ((cstr=va_arg(strs,char*)) != NULL)
  46   {
  47    cslen=strlen(cstr);
  48    grow=BACKSQL_MAX(BACKSQL_STR_GROW,cslen);
  49    if (*buflen-cdlen < cslen)
  50     {
  51      //Debug(LDAP_DEBUG_TRACE,"my_strcat(): buflen=%d, cdlen=%d, cslen=%d -- reallocating dest\n",
  52      //                     *buflen,cdlen,cslen);
  53      dest=(char*)ch_realloc(dest,(*buflen)+grow*sizeof(char));
  54      if (dest == NULL)
  55       {
  56        Debug(LDAP_DEBUG_ANY,"my_strcat(): could not reallocate string buffer.\n",0,0,0);
  57       }
  58      *buflen+=grow;
  59      //Debug(LDAP_DEBUG_TRACE,"my_strcat(): new buflen=%d, dest=%p\n",*buflen,dest,0);
  60     }
  61    strcat(dest,cstr);
  62    cdlen+=cslen;
  63   }
  64  va_end(strs);
  65  //Debug(LDAP_DEBUG_TRACE,"<==my_strcat() (dest='%s')\n",dest,0,0);
  66  return dest;
  67 }
  68
  69 int backsql_entry_addattr(Entry *e,char *at_name,char *at_val,unsigned int at_val_len)
  70 {
  71  Attribute *c_at=e->e_attrs;
  72  struct berval **cval;
  73  int nvals;
  74
  75  Debug(LDAP_DEBUG_TRACE,"backsql_entry_addattr(): at_name='%s', at_val='%s'\n",at_name,at_val,0);
  76  while (c_at!=NULL && strcasecmp(c_at->a_type,at_name))
  77   c_at=c_at->a_next;
  78  if (c_at == NULL)
  79   {
  80    //Debug(LDAP_DEBUG_TRACE,"backsql_addattr(): creating new attribute\n",0,0,0);
  81    c_at=(Attribute *)ch_calloc(sizeof(Attribute),1);
  82    c_at->a_type=ch_strdup(at_name);
  83    c_at->a_syntax=SYNTAX_CIS;
  84    c_at->a_vals=(struct berval**)ch_calloc(sizeof(struct berval *),1);
  85    c_at->a_vals[0]=NULL;
  86    c_at->a_next=e->e_attrs;
  87    e->e_attrs=c_at;
  88   }
  89  //Debug(LDAP_DEBUG_TRACE,"backsql_addattr(): checking attribute values\n",0,0,0);
  90  //should use different comparison methods for different attributes
  91  //for now, uses memcmp
  92  for (cval=c_at->a_vals,nvals=0;*cval != NULL &&
  93       memcmp((*cval)->bv_val,at_val,BACKSQL_MIN((*cval)->bv_len,at_val_len));cval++,nvals++);
  94
  95  if (*cval==NULL)
  96   {
  97    //Debug(LDAP_DEBUG_TRACE,"backsql_addattr(): nvals=%d; adding new value\n",nvals,0,0);
  98    c_at->a_vals=(struct berval **)realloc(c_at->a_vals,sizeof(struct berval *)*(nvals+2));
  99    c_at->a_vals[nvals]=(struct berval*)ch_calloc(sizeof(struct berval),1);
 100    c_at->a_vals[nvals]->bv_val=(char*)ch_calloc(sizeof(char),at_val_len);
 101    strncpy(c_at->a_vals[nvals]->bv_val,at_val,at_val_len);
 102    c_at->a_vals[nvals]->bv_len=at_val_len;
 103    c_at->a_vals[nvals+1]=NULL;
 104   }
 105  else
 106  {
 107   //Debug(LDAP_DEBUG_TRACE,"backsql_addattr(): value already exists\n",0,0,0);
 108  }
 109  Debug(LDAP_DEBUG_TRACE,"<==backsql_query_addattr()\n",0,0,0);
 110  return 1;
 111 }
 112
 113 char* backsql_get_table_spec(char **p)
 114 {
 115  char *s,*q;
 116  char *res=NULL;
 117  int res_len=0;
 118
 119  s=*p;
 120  while(**p && **p!=',') (*p)++;
 121  if (**p)
 122   *(*p)++='\0';
 123
 124 #define BACKSQL_NEXT_WORD  {while (*s && isspace(*s)) s++; if (!*s) return res; q=s; while (*q && !isspace(*q)) q++; if (*q) *q++='\0';}
 125  BACKSQL_NEXT_WORD;
 126  res=backsql_strcat(res,&res_len,s,NULL);//table name
 127  s=q;
 128
 129  BACKSQL_NEXT_WORD;
 130  if (!strcasecmp(s,"as"))
 131  {
 132   s=q;
 133   BACKSQL_NEXT_WORD;
 134  }
 135  //res=backsql_strcat(res,&res_len," AS ",s,NULL);//table alias
 136  //oracle doesn't understand AS :(
 137  res=backsql_strcat(res,&res_len," ",s,NULL);//table alias
 138  return res;
 139 }
 140
 141 int backsql_merge_from_clause(char **dest_from,int *dest_len,char *src_from)
 142 {
 143  char *s,*p,*srcc,*pos,e;
 144
 145  //Debug(LDAP_DEBUG_TRACE,"==>backsql_merge_from_clause(): dest_from='%s',src_from='%s'\n",
 146  //                             dest_from,src_from,0);
 147  srcc=ch_strdup(src_from);
 148  p=srcc;
 149  while(*p)
 150  {
 151   s=backsql_get_table_spec(&p);
 152  // Debug(LDAP_DEBUG_TRACE,"backsql_merge_from_clause(): p='%s' s='%s'\n",p,s,0);
 153   if (*dest_from==NULL)
 154    *dest_from=backsql_strcat(*dest_from,dest_len,s,NULL);
 155   else
 156         if((pos=strstr(*dest_from,s))==NULL)
 157      *dest_from=backsql_strcat(*dest_from,dest_len,",",s,NULL);
 158     else if((e=pos[strlen(s)])!='\0' && e!=',')
 159       *dest_from=backsql_strcat(*dest_from,dest_len,",",s,NULL);
 160   if (s)
 161         ch_free(s);
 162  }
 163 // Debug(LDAP_DEBUG_TRACE,"<==backsql_merge_from_clause()\n",0,0,0);
 164  free(srcc);
 165  return 1;
 166 }
 167
 168 #endif /* SLAPD_SQL */