GRASS GIS 7 Programmer's Manual  7.9.dev(2021)-e384be2c9
shpopen.c File Reference
#include <grass/shapefil.h>
#include <math.h>
#include <limits.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
Include dependency graph for shpopen.c:

Go to the source code of this file.

Macros

#define CPL_UNUSED
 
#define FALSE   0
 
#define TRUE   1
 
#define ByteCopy(a, b, c)   memcpy( b, a, c )
 
#define MIN(a, b)   ((a<b) ? a : b)
 
#define MAX(a, b)   ((a>b) ? a : b)
 

Typedefs

typedef unsigned char uchar
 
typedef unsigned int int32
 

Functions

void SHPAPI_CALL SHPWriteHeader (SHPHandle psSHP)
 
SHPHandle SHPAPI_CALL SHPOpen (const char *pszLayer, const char *pszAccess)
 
SHPHandle SHPAPI_CALL SHPOpenLL (const char *pszLayer, const char *pszAccess, SAHooks *psHooks)
 
SHPHandle SHPAPI_CALL SHPOpenLLEx (const char *pszLayer, const char *pszAccess, SAHooks *psHooks, int bRestoreSHX)
 
int SHPAPI_CALL SHPRestoreSHX (const char *pszLayer, const char *pszAccess, SAHooks *psHooks)
 
void SHPAPI_CALL SHPClose (SHPHandle psSHP)
 
void SHPAPI_CALL SHPSetFastModeReadObject (SHPHandle hSHP, int bFastMode)
 
void SHPAPI_CALL SHPGetInfo (SHPHandle psSHP, int *pnEntities, int *pnShapeType, double *padfMinBound, double *padfMaxBound)
 
SHPHandle SHPAPI_CALL SHPCreate (const char *pszLayer, int nShapeType)
 
SHPHandle SHPAPI_CALL SHPCreateLL (const char *pszLayer, int nShapeType, SAHooks *psHooks)
 
void SHPAPI_CALL SHPComputeExtents (SHPObject *psObject)
 
SHPObject SHPAPI_CALL1SHPCreateObject (int nSHPType, int nShapeId, int nParts, const int *panPartStart, const int *panPartType, int nVertices, const double *padfX, const double *padfY, const double *padfZ, const double *padfM){ SHPObject *psObject;int i, bHasM, bHasZ;psObject=(SHPObject *) calloc(1, sizeof(SHPObject)
 
 if (nSHPType==SHPT_ARCM||nSHPType==SHPT_POINTM||nSHPType==SHPT_POLYGONM||nSHPType==SHPT_MULTIPOINTM)
 
 if (nVertices > 0)
 
 SHPComputeExtents (psObject)
 
 return (psObject)
 
SHPObject SHPAPI_CALL1SHPCreateSimpleObject (int nSHPType, int nVertices, const double *padfX, const double *padfY, const double *padfZ){ return(SHPCreateObject(nSHPType, -1, 0, NULL, NULL, nVertices, padfX, padfY, padfZ, NULL)
 
int SHPAPI_CALL SHPWriteObject (SHPHandle psSHP, int nShapeId, SHPObject *psObject)
 
SHPObject SHPAPI_CALL1SHPReadObject (SHPHandle psSHP, int hEntity){ int nEntitySize, nRequiredSize;SHPObject *psShape;char szErrorMsg[128];int nSHPType;int nBytesRead;if(hEntity< 0||hEntity >=psSHP->nRecords) return(NULL
 
 if (psSHP->panRecOffset[hEntity]==0 &&psSHP->fpSHX !=NULL)
 
 if (nEntitySize > psSHP->nBufSize)
 
 if (psSHP->pabyRec==NULL)
 
 if (psSHP->sHooks.FSeek(psSHP->fpSHP, psSHP->panRecOffset[hEntity], 0) !=0)
 
 if (nBytesRead >=8 &&nBytesRead==nEntitySize - 8)
 
else if (nBytesRead !=nEntitySize)
 
 if (8+4 > nEntitySize)
 
 if (bBigEndian)
 
 if (psShape->nSHPType==SHPT_POLYGON||psShape->nSHPType==SHPT_ARC||psShape->nSHPType==SHPT_POLYGONZ||psShape->nSHPType==SHPT_POLYGONM||psShape->nSHPType==SHPT_ARCZ||psShape->nSHPType==SHPT_ARCM||psShape->nSHPType==SHPT_MULTIPATCH)
 
 return (psShape)
 
const char SHPAPI_CALL1SHPTypeName (int nSHPType){ switch(nSHPType
 
const char SHPAPI_CALL1SHPPartTypeName (int nPartType){ switch(nPartType
 
void SHPAPI_CALL SHPDestroyObject (SHPObject *psShape)
 
int SHPAPI_CALL SHPRewindObject (CPL_UNUSED SHPHandle hSHP, SHPObject *psObject)
 

Variables

psObject nSHPType = nSHPType
 
psObject nShapeId = nShapeId
 
psObject bMeasureIsUsed = FALSE
 
 else
 
 bHasZ = FALSE
 
psObject nVertices = nVertices
 
 nEntitySize = psSHP->panRecSize[hEntity]+8
 
 nBytesRead = (int)psSHP->sHooks.FRead( psSHP->pabyRec, 1, nEntitySize, psSHP->fpSHP )
 
else psShape = (SHPObject *) calloc(1,sizeof(SHPObject))
 
psShape bFastModeReadObject = psSHP->bFastModeReadObject
 

Macro Definition Documentation

◆ ByteCopy

#define ByteCopy (   a,
  b,
 
)    memcpy( b, a, c )

Definition at line 296 of file shpopen.c.

Referenced by SHPCreateLL(), and SHPWriteHeader().

◆ CPL_UNUSED

#define CPL_UNUSED

Definition at line 280 of file shpopen.c.

◆ FALSE

#define FALSE   0

◆ MAX

#define MAX (   a,
  b 
)    ((a>b) ? a : b)

Definition at line 299 of file shpopen.c.

Referenced by SHPComputeExtents().

◆ MIN

#define MIN (   a,
  b 
)    ((a<b) ? a : b)

Definition at line 298 of file shpopen.c.

Referenced by SHPComputeExtents().

◆ TRUE

#define TRUE   1

Definition at line 293 of file shpopen.c.

Referenced by if(), SHPCreateLL(), SHPOpenLL(), SHPRestoreSHX(), and SHPWriteObject().

Typedef Documentation

◆ int32

typedef unsigned int int32

Definition at line 288 of file shpopen.c.

◆ uchar

typedef unsigned char uchar

Definition at line 283 of file shpopen.c.

Function Documentation

◆ if() [1/11]

◆ if() [2/11]

◆ if() [3/11]

if ( psSHP->  panRecOffset[hEntity] = = 0 && psSHP->fpSHX != NULL)

◆ if() [4/11]

if ( nEntitySize  ,
psSHP->  nBufSize 
)

◆ if() [5/11]

if ( psSHP->  pabyRec = NULL)

Definition at line 2098 of file shpopen.c.

References NULL.

◆ if() [6/11]

if ( psSHP->sHooks.FSeek(psSHP->fpSHP, psSHP->panRecOffset[hEntity], 0) !  = 0)

Definition at line 2106 of file shpopen.c.

References SAHooks::Error, NULL, SHPInfo::panRecOffset, and SHPInfo::sHooks.

◆ if() [7/11]

if ( nBytesRead >=8 &&  nBytesRead = nEntitySize - 8)

Definition at line 2129 of file shpopen.c.

References SHPInfo::pabyRec.

◆ if() [8/11]

Definition at line 2148 of file shpopen.c.

References SAHooks::Error, NULL, SHPInfo::panRecOffset, and SHPInfo::sHooks.

◆ if() [9/11]

if ( 8+  4,
nEntitySize   
)

Definition at line 2163 of file shpopen.c.

References SAHooks::Error, NULL, SHPInfo::pabyRec, and SHPInfo::sHooks.

◆ if() [10/11]

if ( bBigEndian  )

Definition at line 2173 of file shpopen.c.

◆ if() [11/11]

◆ return() [1/2]

return ( psObject  )

◆ return() [2/2]

return ( psShape  )

◆ SHPClose()

◆ SHPComputeExtents() [1/2]

◆ SHPComputeExtents() [2/2]

SHPComputeExtents ( psObject  )

◆ SHPCreate()

SHPHandle SHPAPI_CALL SHPCreate ( const char *  pszLayer,
int  nShapeType 
)

Definition at line 1173 of file shpopen.c.

References SASetupDefaultHooks(), SHPAPI_CALL, and SHPCreateLL().

◆ SHPCreateLL()

SHPHandle SHPAPI_CALL SHPCreateLL ( const char *  pszLayer,
int  nShapeType,
SAHooks psHooks 
)

Definition at line 1191 of file shpopen.c.

References ByteCopy, SAHooks::Error, FALSE, SAHooks::FOpen, free(), malloc(), NULL, and TRUE.

Referenced by SHPCreate().

◆ SHPCreateObject()

SHPObject SHPAPI_CALL1* SHPCreateObject ( int  nSHPType,
int  nShapeId,
int  nParts,
const int *  panPartStart,
const int *  panPartType,
int  nVertices,
const double *  padfX,
const double *  padfY,
const double *  padfZ,
const double *  padfM 
)

Referenced by SHPComputeExtents().

◆ SHPCreateSimpleObject()

SHPObject SHPAPI_CALL1* SHPCreateSimpleObject ( int  nSHPType,
int  nVertices,
const double *  padfX,
const double *  padfY,
const double *  padfZ 
)

◆ SHPDestroyObject()

◆ SHPGetInfo()

void SHPAPI_CALL SHPGetInfo ( SHPHandle  psSHP,
int *  pnEntities,
int *  pnShapeType,
double *  padfMinBound,
double *  padfMaxBound 
)

◆ SHPOpen()

SHPHandle SHPAPI_CALL SHPOpen ( const char *  pszLayer,
const char *  pszAccess 
)

Definition at line 489 of file shpopen.c.

References SASetupDefaultHooks(), SHPAPI_CALL, and SHPOpenLL().

◆ SHPOpenLL()

SHPHandle SHPAPI_CALL SHPOpenLL ( const char *  pszLayer,
const char *  pszAccess,
SAHooks psHooks 
)

◆ SHPOpenLLEx()

SHPHandle SHPAPI_CALL SHPOpenLLEx ( const char *  pszLayer,
const char *  pszAccess,
SAHooks psHooks,
int  bRestoreSHX 
)

Definition at line 850 of file shpopen.c.

References NULL, SHPAPI_CALL, SHPOpenLL(), and SHPRestoreSHX().

◆ SHPPartTypeName()

const char SHPAPI_CALL1* SHPPartTypeName ( int  nPartType)

◆ SHPReadObject()

SHPObject SHPAPI_CALL1* SHPReadObject ( SHPHandle  psSHP,
int  hEntity 
) -> nRecords) return(NULL

◆ SHPRestoreSHX()

int SHPAPI_CALL SHPRestoreSHX ( const char *  pszLayer,
const char *  pszAccess,
SAHooks psHooks 
)

Definition at line 874 of file shpopen.c.

References SAHooks::Error, FALSE, SAHooks::FOpen, SAHooks::FRead, free(), malloc(), NULL, and TRUE.

Referenced by SHPOpenLLEx().

◆ SHPRewindObject()

◆ SHPSetFastModeReadObject()

void SHPAPI_CALL SHPSetFastModeReadObject ( SHPHandle  hSHP,
int  bFastMode 
)

◆ SHPTypeName()

◆ SHPWriteHeader()

void SHPAPI_CALL SHPWriteHeader ( SHPHandle  psSHP)

Definition at line 359 of file shpopen.c.

References ByteCopy, SAHooks::Error, SHPInfo::fpSHX, SHPInfo::nFileSize, NULL, and SHPInfo::sHooks.

Referenced by SHPClose().

◆ SHPWriteObject()

int SHPAPI_CALL SHPWriteObject ( SHPHandle  psSHP,
int  nShapeId,
SHPObject psObject 
)

Variable Documentation

◆ bFastModeReadObject

psShape bFastModeReadObject = psSHP->bFastModeReadObject

Definition at line 2195 of file shpopen.c.

◆ bHasZ

bHasZ = FALSE

Definition at line 1423 of file shpopen.c.

Referenced by SHPComputeExtents().

◆ bMeasureIsUsed

psShape bMeasureIsUsed = FALSE

Definition at line 1398 of file shpopen.c.

◆ else

else
Initial value:
{
bHasM = FALSE
#define FALSE
Definition: shpopen.c:292

Definition at line 1421 of file shpopen.c.

◆ nBytesRead

nBytesRead = (int)psSHP->sHooks.FRead( psSHP->pabyRec, 1, nEntitySize, psSHP->fpSHP )

Definition at line 2121 of file shpopen.c.

◆ nEntitySize

nEntitySize = psSHP->panRecSize[hEntity]+8

Definition at line 2043 of file shpopen.c.

Referenced by if().

◆ nShapeId

psShape nShapeId = nShapeId

Definition at line 1397 of file shpopen.c.

Referenced by SHPComputeExtents().

◆ nSHPType

psShape nSHPType = nSHPType

Definition at line 1396 of file shpopen.c.

Referenced by SHPComputeExtents().

◆ nVertices

psObject nVertices = nVertices

Definition at line 1488 of file shpopen.c.

Referenced by if(), and SHPComputeExtents().

◆ psShape

else psShape = (SHPObject *) calloc(1,sizeof(SHPObject))

Definition at line 2191 of file shpopen.c.