PostgreSQL Source Code  git master
copyfuncs.c File Reference
#include "postgres.h"
#include "miscadmin.h"
#include "utils/datum.h"
#include "copyfuncs.funcs.c"
#include "copyfuncs.switch.c"
Include dependency graph for copyfuncs.c:

Go to the source code of this file.

Macros

#define COPY_SCALAR_FIELD(fldname)    (newnode->fldname = from->fldname)
 
#define COPY_NODE_FIELD(fldname)    (newnode->fldname = copyObjectImpl(from->fldname))
 
#define COPY_BITMAPSET_FIELD(fldname)    (newnode->fldname = bms_copy(from->fldname))
 
#define COPY_STRING_FIELD(fldname)    (newnode->fldname = from->fldname ? pstrdup(from->fldname) : (char *) NULL)
 
#define COPY_ARRAY_FIELD(fldname)    memcpy(newnode->fldname, from->fldname, sizeof(newnode->fldname))
 
#define COPY_POINTER_FIELD(fldname, sz)
 
#define COPY_LOCATION_FIELD(fldname)    (newnode->fldname = from->fldname)
 

Functions

static Const_copyConst (const Const *from)
 
static A_Const_copyA_Const (const A_Const *from)
 
static ExtensibleNode_copyExtensibleNode (const ExtensibleNode *from)
 
static Bitmapset_copyBitmapset (const Bitmapset *from)
 
void * copyObjectImpl (const void *from)
 

Macro Definition Documentation

◆ COPY_ARRAY_FIELD

#define COPY_ARRAY_FIELD (   fldname)     memcpy(newnode->fldname, from->fldname, sizeof(newnode->fldname))

Definition at line 46 of file copyfuncs.c.

◆ COPY_BITMAPSET_FIELD

#define COPY_BITMAPSET_FIELD (   fldname)     (newnode->fldname = bms_copy(from->fldname))

Definition at line 38 of file copyfuncs.c.

◆ COPY_LOCATION_FIELD

#define COPY_LOCATION_FIELD (   fldname)     (newnode->fldname = from->fldname)

Definition at line 61 of file copyfuncs.c.

◆ COPY_NODE_FIELD

#define COPY_NODE_FIELD (   fldname)     (newnode->fldname = copyObjectImpl(from->fldname))

Definition at line 34 of file copyfuncs.c.

◆ COPY_POINTER_FIELD

#define COPY_POINTER_FIELD (   fldname,
  sz 
)
Value:
do { \
Size _size = (sz); \
if (_size > 0) \
{ \
newnode->fldname = palloc(_size); \
memcpy(newnode->fldname, from->fldname, _size); \
} \
} while (0)
void * palloc(Size size)
Definition: mcxt.c:1210

Definition at line 50 of file copyfuncs.c.

◆ COPY_SCALAR_FIELD

#define COPY_SCALAR_FIELD (   fldname)     (newnode->fldname = from->fldname)

Definition at line 30 of file copyfuncs.c.

◆ COPY_STRING_FIELD

#define COPY_STRING_FIELD (   fldname)     (newnode->fldname = from->fldname ? pstrdup(from->fldname) : (char *) NULL)

Definition at line 42 of file copyfuncs.c.

Function Documentation

◆ _copyA_Const()

static A_Const* _copyA_Const ( const A_Const from)
static

Definition at line 108 of file copyfuncs.c.

109 {
110  A_Const *newnode = makeNode(A_Const);
111 
112  COPY_SCALAR_FIELD(isnull);
113  if (!from->isnull)
114  {
115  /* This part must duplicate other _copy*() functions. */
116  COPY_SCALAR_FIELD(val.node.type);
117  switch (nodeTag(&from->val))
118  {
119  case T_Integer:
120  COPY_SCALAR_FIELD(val.ival.ival);
121  break;
122  case T_Float:
123  COPY_STRING_FIELD(val.fval.fval);
124  break;
125  case T_Boolean:
126  COPY_SCALAR_FIELD(val.boolval.boolval);
127  break;
128  case T_String:
129  COPY_STRING_FIELD(val.sval.sval);
130  break;
131  case T_BitString:
132  COPY_STRING_FIELD(val.bsval.bsval);
133  break;
134  default:
135  elog(ERROR, "unrecognized node type: %d",
136  (int) nodeTag(&from->val));
137  break;
138  }
139  }
140 
141  COPY_LOCATION_FIELD(location);
142 
143  return newnode;
144 }
#define COPY_LOCATION_FIELD(fldname)
Definition: copyfuncs.c:61
#define COPY_STRING_FIELD(fldname)
Definition: copyfuncs.c:42
#define COPY_SCALAR_FIELD(fldname)
Definition: copyfuncs.c:30
#define ERROR
Definition: elog.h:39
long val
Definition: informix.c:664
#define nodeTag(nodeptr)
Definition: nodes.h:122
#define makeNode(_type_)
Definition: nodes.h:165
bool isnull
Definition: parsenodes.h:354
union ValUnion val
Definition: parsenodes.h:353

References COPY_LOCATION_FIELD, COPY_SCALAR_FIELD, COPY_STRING_FIELD, elog(), ERROR, A_Const::isnull, makeNode, nodeTag, A_Const::val, and val.

◆ _copyBitmapset()

static Bitmapset* _copyBitmapset ( const Bitmapset from)
static

Definition at line 164 of file copyfuncs.c.

165 {
166  return bms_copy(from);
167 }
Bitmapset * bms_copy(const Bitmapset *a)
Definition: bitmapset.c:74

References bms_copy().

◆ _copyConst()

static Const* _copyConst ( const Const from)
static

Definition at line 73 of file copyfuncs.c.

74 {
75  Const *newnode = makeNode(Const);
76 
77  COPY_SCALAR_FIELD(consttype);
78  COPY_SCALAR_FIELD(consttypmod);
79  COPY_SCALAR_FIELD(constcollid);
80  COPY_SCALAR_FIELD(constlen);
81 
82  if (from->constbyval || from->constisnull)
83  {
84  /*
85  * passed by value so just copy the datum. Also, don't try to copy
86  * struct when value is null!
87  */
88  newnode->constvalue = from->constvalue;
89  }
90  else
91  {
92  /*
93  * passed by reference. We need a palloc'd copy.
94  */
95  newnode->constvalue = datumCopy(from->constvalue,
96  from->constbyval,
97  from->constlen);
98  }
99 
100  COPY_SCALAR_FIELD(constisnull);
101  COPY_SCALAR_FIELD(constbyval);
102  COPY_LOCATION_FIELD(location);
103 
104  return newnode;
105 }
Datum datumCopy(Datum value, bool typByVal, int typLen)
Definition: datum.c:132
int constlen
Definition: primnodes.h:276
Datum constvalue
Definition: primnodes.h:278
bool constisnull
Definition: primnodes.h:280
bool constbyval
Definition: primnodes.h:287

References Const::constbyval, Const::constisnull, Const::constlen, Const::constvalue, COPY_LOCATION_FIELD, COPY_SCALAR_FIELD, datumCopy(), and makeNode.

◆ _copyExtensibleNode()

static ExtensibleNode* _copyExtensibleNode ( const ExtensibleNode from)
static

Definition at line 147 of file copyfuncs.c.

148 {
149  ExtensibleNode *newnode;
150  const ExtensibleNodeMethods *methods;
151 
152  methods = GetExtensibleNodeMethods(from->extnodename, false);
153  newnode = (ExtensibleNode *) newNode(methods->node_size,
154  T_ExtensibleNode);
155  COPY_STRING_FIELD(extnodename);
156 
157  /* copy the private fields */
158  methods->nodeCopy(newnode, from);
159 
160  return newnode;
161 }
const ExtensibleNodeMethods * GetExtensibleNodeMethods(const char *extnodename, bool missing_ok)
Definition: extensible.c:125
#define newNode(size, tag)
Definition: nodes.h:155
void(* nodeCopy)(struct ExtensibleNode *newnode, const struct ExtensibleNode *oldnode)
Definition: extensible.h:66
const char * extnodename
Definition: extensible.h:37

References COPY_STRING_FIELD, ExtensibleNode::extnodename, GetExtensibleNodeMethods(), newNode, ExtensibleNodeMethods::node_size, and ExtensibleNodeMethods::nodeCopy.

◆ copyObjectImpl()

void* copyObjectImpl ( const void *  from)

Definition at line 177 of file copyfuncs.c.

178 {
179  void *retval;
180 
181  if (from == NULL)
182  return NULL;
183 
184  /* Guard against stack overflow due to overly complex expressions */
186 
187  switch (nodeTag(from))
188  {
189 #include "copyfuncs.switch.c"
190 
191  case T_List:
192  retval = list_copy_deep(from);
193  break;
194 
195  /*
196  * Lists of integers, OIDs and XIDs don't need to be deep-copied,
197  * so we perform a shallow copy via list_copy()
198  */
199  case T_IntList:
200  case T_OidList:
201  case T_XidList:
202  retval = list_copy(from);
203  break;
204 
205  default:
206  elog(ERROR, "unrecognized node type: %d", (int) nodeTag(from));
207  retval = 0; /* keep compiler quiet */
208  break;
209  }
210 
211  return retval;
212 }
List * list_copy_deep(const List *oldlist)
Definition: list.c:1638
List * list_copy(const List *oldlist)
Definition: list.c:1572
void check_stack_depth(void)
Definition: postgres.c:3454

References check_stack_depth(), elog(), ERROR, list_copy(), list_copy_deep(), and nodeTag.

Referenced by list_copy_deep().