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php_proj.c
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php_proj.c
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/**********************************************************************
* $Id$
*
* Project: MapServer
* Purpose: PHP wraper function to PROJ4 projection module.
* Author: Yewondwossen Assefa, DM Solutions Group (assefa@dmsolutions.ca)
*
**********************************************************************
* Copyright (c) 2000-2005, Y. Assefa, DM Solutions Group inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies of this Software or works derived from this Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
**********************************************************************
*
* $Log$
* Revision 1.10 2005/06/14 16:03:36 dan
* Updated copyright date to 2005
*
* Revision 1.9 2005/01/04 22:55:27 assefa
* Add PHP5 support for windows (Bug 1100).
*
* Revision 1.8 2002/03/08 23:16:41 assefa
* Add PHP4.1 support.
*
* Revision 1.7 2002/01/22 19:18:54 dan
* Fixed a typo in pj_transform() docs
*
* Revision 1.6 2002/01/22 19:18:17 dan
* Took pj_datum_transform() out of docs to discourage its use.
*
* Revision 1.5 2001/09/25 14:52:54 assefa
* Add pj_transform function.
*
* Revision 1.4 2001/02/23 20:35:57 assefa
* Free function does not work for PHP4. Disable it for now.
*
* Revision 1.3 2001/01/09 05:24:41 dan
* Fixes to build with PHP 4.0.4
*
* Revision 1.2 2000/11/08 15:44:16 dan
* Correct compilation errors with php4.
*
* Revision 1.1 2000/11/02 16:39:55 dan
* PHP PROJ4 module.
*
*
**********************************************************************/
/*
* PHP PROJ4 Module
*
* This is a PHP module that gives acces to basic PROJ4 projection
* functionalities.
*
* There following functions available in this module :
*
* 1) pj_init : create and initializes a projection structures
*
* PJ pj_init(array_of_parameters)
*
* Example : $projarray[0] = "proj=lcc";
* $projarray[1] = "ellps=GRS80";
* $projarray[2] = "lat_0=49";
* $projarray[3] = "lon_0=-95";
* $projarray[4] = "lat_1=49";
* $projarray[5] = "lat_2=77";
*
* $pj = pj_init($projarray);
*
* 2) pj_fwd : Performs a projection from lat/long coordinates to
* cartesian coordinates.
*
* retrun_array pj_fwd(double lat, double long, PJ pj)
*
* Example : $lat = 45.25;
* $long = -75.42;
*
* $ret = pj_fwd($ingeox, $ingeoy, $pj);
* printf("geo x = %f<br>\n", $ret["u"]);
* printf("geo y = %f<br>\n",$ret["v"]);
*
* 3) pj_inv : Performs a projection from cartesian coordinates to
* lat/long coordinates .
*
* retrun_array pj_fwd(double geox, double geoy, PJ pj)
*
* Example : $ingeox = 1537490.335842;
* $ingeoy = -181633.471555;
*
* $ret = pj_inv($ingeox, $ingeoy, $pj);
* printf("lat = %f<br>\n", $ret["u"]);
* printf("lon = %f<br>\n",$ret["v"]);
*
*
* 4) pj_transform : pj_transform(PJ pjsrc, PJ pjdst, double x, double y)
* transforms coordinates from source projection to
* destination projection.
*
* Example : $projarray[0] = "proj=lcc";
* $projarray[1] = "ellps=GRS80";
* $projarray[2] = "lat_0=49";
* $projarray[3] = "lon_0=-95";
* $projarray[4] = "lat_1=49";
* $projarray[5] = "lat_2=77";
* $projarray[6] = "";
*
* $pjlcc = pj_init($projarray);
* $projarray2[0] = "proj=latlong";
* $pjlat = pj_init($projarray2);
*
* $ingeox = 1537490.335842;
* $ingeoy = -181633.471555;
*
* $ret = pj_transform($pjlcc, $pjlat, $ingeox, $ingeoy);
*
* 5) pj_free : frees PJ structure
*
* void pj_free(PJ pj);
*
**********************************************************************/
#ifdef USE_PROJ
#include <projects.h>
#include "php_mapscript_util.h"
#include "php.h"
#include "php_globals.h"
#include "maperror.h"
#include <time.h>
#if defined(_WIN32) && !defined(__CYGWIN__)
#include <process.h>
#else
#include <errno.h>
#endif
#define ZEND_DEBUG 0
#ifndef DLEXPORT
#define DLEXPORT ZEND_DLEXPORT
#endif
#define PHP_PROJ_VERSION "1.0.000 (Nov. 1, 2000)"
/*=====================================================================
* Prototypes
*====================================================================*/
DLEXPORT void php_proj_pj_init(INTERNAL_FUNCTION_PARAMETERS);
DLEXPORT void php_proj_pj_fwd(INTERNAL_FUNCTION_PARAMETERS);
DLEXPORT void php_proj_pj_inv(INTERNAL_FUNCTION_PARAMETERS);
DLEXPORT void php_proj_pj_transform(INTERNAL_FUNCTION_PARAMETERS);
DLEXPORT void php_proj_pj_datum_transform(INTERNAL_FUNCTION_PARAMETERS);
DLEXPORT void php_proj_pj_free(INTERNAL_FUNCTION_PARAMETERS);
DLEXPORT void php_info_proj(void);
DLEXPORT int php_init_proj(INIT_FUNC_ARGS);
DLEXPORT int php_end_proj(SHUTDOWN_FUNC_ARGS);
DLEXPORT void ttt(INTERNAL_FUNCTION_PARAMETERS);
#ifdef ZEND_VERSION
PHP_MINFO_FUNCTION(phpproj);
#else
DLEXPORT void php_info_proj(void);
#endif
static zend_class_entry *proj_class_entry_ptr;
#define PHPMS_GLOBAL(a) a
static int le_projobj;
function_entry php_proj_functions[] = {
{"pj_fwd", php_proj_pj_fwd, NULL},
{"pj_inv", php_proj_pj_inv, NULL},
{"pj_init", php_proj_pj_init, NULL},
{"pj_transform", php_proj_pj_transform, NULL},
{"pj_datum_transform", php_proj_pj_datum_transform, NULL},
{"pj_free", php_proj_pj_free, NULL},
{NULL, NULL, NULL}
};
php3_module_entry php_proj_module_entry = {
#if ZEND_MODULE_API_NO >= 20010901
STANDARD_MODULE_HEADER,
#endif
"PHPPROJ", php_proj_functions, php_init_proj, php_end_proj,
NULL, NULL,
#ifdef ZEND_VERSION
PHP_MINFO(phpproj),
#else
php_info_proj,
#endif
#if ZEND_MODULE_API_NO >= 20010901
"phpproj, php4.1version", /* extension version number (string) */
#endif
STANDARD_MODULE_PROPERTIES
};
#if COMPILE_DL
DLEXPORT php3_module_entry *get_module(void)
{
return &php_proj_module_entry;
}
#endif
function_entry php_proj_class_functions[] = {
{"ttt", ttt, NULL},
{NULL, NULL, NULL}
};
DLEXPORT void ttt(INTERNAL_FUNCTION_PARAMETERS)
{
}
#ifdef ZEND_VERSION
PHP_MINFO_FUNCTION(phpproj)
#else
DLEXPORT void php_info_proj(void)
#endif
{
php3_printf(" Version %s<br>\n", PHP_PROJ_VERSION);
php3_printf("<BR>\n");
}
DLEXPORT int php_init_proj(INIT_FUNC_ARGS)
{
zend_class_entry tmp_class_entry;
PHPMS_GLOBAL(le_projobj) =
register_list_destructors(php_proj_pj_free,
NULL);
INIT_CLASS_ENTRY(tmp_class_entry, "proj", php_proj_class_functions);
proj_class_entry_ptr = zend_register_internal_class(&tmp_class_entry TSRMLS_CC);
return SUCCESS;
}
DLEXPORT int php_end_proj(SHUTDOWN_FUNC_ARGS)
{
return SUCCESS;
}
#if !defined DEG_TO_RAD
#define DEG_TO_RAD 0.0174532925199432958
#endif
#if !defined RAD_TO_DEG
#define RAD_TO_DEG 57.29577951308232
#endif
/**********************************************************************
* _php_proj_build_proj_object
**********************************************************************/
static long _php_proj_build_proj_object(PJ *pj,
HashTable *list, pval *return_value TSRMLS_DC)
{
int pj_id;
if (pj == NULL)
return 0;
pj_id = php3_list_insert(pj, PHPMS_GLOBAL(le_projobj));
_phpms_object_init(return_value, pj_id, php_proj_class_functions,
PHP4_CLASS_ENTRY(proj_class_entry_ptr) TSRMLS_CC);
return pj_id;
}
/************************************************************************/
/* DLEXPORT void php_proj_pj_init(INTERNAL_FUNCTION_PARAMETERS) */
/* */
/* Creates and initialize a PJ structure that can be used with */
/* proj_fwd and proj_inv function. */
/* */
/* Parameter : */
/* */
/* array : array of parameters */
/* */
/* Ex : */
/* */
/* $projarray[0] = "proj=lcc"; */
/* $projarray[1] = "ellps=GRS80"; */
/* $projarray[2] = "lat_0=49"; */
/* $projarray[3] = "lon_0=-95"; */
/* $projarray[4] = "lat_1=49"; */
/* $projarray[5] = "lat_2=77"; */
/* */
/* $pj = pj_init($projarray); */
/* */
/************************************************************************/
DLEXPORT void php_proj_pj_init(INTERNAL_FUNCTION_PARAMETERS)
{
pval *pArrayOfParams = NULL;
pval **pParam = NULL;
HashTable *list=NULL;
int nParamCount = 0;
int i = 0;
PJ *pj = NULL;
char **papszBuf = NULL;
// char *strttt = NULL;
// int ttt;
//ttt = strlen(strttt);
/* -------------------------------------------------------------------- */
/* extract parameters. */
/* -------------------------------------------------------------------- */
if (getParameters(ht, 1, &pArrayOfParams) != SUCCESS) {
WRONG_PARAM_COUNT;
}
if (pArrayOfParams->type == IS_ARRAY)
nParamCount = _php3_hash_num_elements(pArrayOfParams->value.ht);
else
nParamCount = 0;
if (nParamCount <= 0)
RETURN_LONG(-1);
papszBuf = (char **) malloc((nParamCount+2)*sizeof(char *));
for (i = 0; i < nParamCount; i++) {
if (_php3_hash_index_find(pArrayOfParams->value.ht, i,
(void **)&pParam) != FAILURE) {
convert_to_string((*pParam));
if ((*pParam)->value.str.val != NULL)
papszBuf[i] = strdup((*pParam)->value.str.val);
}
}
papszBuf[i] = NULL;
pj = pj_init(nParamCount, papszBuf);
_php_proj_build_proj_object(pj, list, return_value TSRMLS_CC);
}
/************************************************************************/
/* DLEXPORT void php_proj_pj_fwd(INTERNAL_FUNCTION_PARAMETERS) */
/* */
/* Performs a projection from lat/long coordinates to */
/* cartesian coordinates (projection defines in the pj parameter) */
/* Parameters : */
/* */
/* - double p1 : latitude (in decimal degree ) */
/* - double p2 : longitude (in decimal degree ) */
/* - PJ pj : valid projection structure (see pj_init) */
/* */
/* Ex : */
/* $lat = 45.25; */
/* $lon = -75.42; */
/* */
/* $ret = pj_fwd($lat, $lon, $pj); */
/* printf("geo x = %f<br>\n", $ret["u"]); */
/* printf("geo y = %f<br>\n",$ret["v"]); */
/* */
/************************************************************************/
DLEXPORT void php_proj_pj_fwd(INTERNAL_FUNCTION_PARAMETERS)
{
HashTable *list=NULL;
pval *p1, *p2;
pval *pj = NULL;
PJ *popj = NULL;
projUV pnt;
projUV pntReturn = {0,0};
/* -------------------------------------------------------------------- */
/* extract parameters. */
/* -------------------------------------------------------------------- */
if (getParameters(ht, 3, &p1, &p2, &pj) != SUCCESS) {
WRONG_PARAM_COUNT;
}
/* -------------------------------------------------------------------- */
/* initilize return array. */
/* -------------------------------------------------------------------- */
if (array_init(return_value) == FAILURE) {
RETURN_FALSE;
}
convert_to_double(p1);
convert_to_double(p2);
popj = (PJ *)_phpms_fetch_handle(pj,
PHPMS_GLOBAL(le_projobj), list TSRMLS_CC);
if (popj) {
pnt.u = p2->value.dval * DEG_TO_RAD;
pnt.v = p1->value.dval * DEG_TO_RAD;
pntReturn = pj_fwd(pnt, popj);
}
add_assoc_double(return_value, "u", pntReturn.u);
add_assoc_double(return_value, "v", pntReturn.v);
}
/************************************************************************/
/* DLEXPORT void php_proj_pj_inv(INTERNAL_FUNCTION_PARAMETERS) */
/* */
/* Performs a projection from cartesian coordinates */
/* (projection defines in the pj parameter) to lat/long */
/* coordinates. */
/* */
/* Return vales are in decimal degrees. */
/* */
/* Parameters : */
/* */
/* - double p1 : projected coordinates (x) */
/* - double p2 : projected coordinates (y) */
/* - PJ pj : valid projection structure (see pj_init) */
/* */
/* Ex : */
/* $ingeox = 1537490.335842; */
/* $ingeoy = -181633.471555; */
/* */
/* $ret = pj_inv($ingeox, $ingeoy, $pj); */
/* */
/* printf("latitude = %f<br>\n", $ret["u"]); */
/* printf("longitude = %f<br>\n",$ret["v"]); */
/************************************************************************/
DLEXPORT void php_proj_pj_inv(INTERNAL_FUNCTION_PARAMETERS)
{
HashTable *list=NULL;
pval *p1, *p2;
pval *pj = NULL;
PJ *popj = NULL;
projUV pnt;
projUV pntReturn = {0,0};
/* -------------------------------------------------------------------- */
/* extract parameters. */
/* -------------------------------------------------------------------- */
if (getParameters(ht, 3, &p1, &p2, &pj) != SUCCESS) {
WRONG_PARAM_COUNT;
}
/* -------------------------------------------------------------------- */
/* initilize return array. */
/* -------------------------------------------------------------------- */
if (array_init(return_value) == FAILURE) {
RETURN_FALSE;
}
convert_to_double(p1);
convert_to_double(p2);
popj = (PJ *)_phpms_fetch_handle(pj,
PHPMS_GLOBAL(le_projobj), list TSRMLS_CC);
if (popj) {
pnt.u = p1->value.dval;
pnt.v = p2->value.dval;
pntReturn = pj_inv(pnt, popj);
pntReturn.u *= RAD_TO_DEG;
pntReturn.v *= RAD_TO_DEG;
}
add_assoc_double(return_value, "u", pntReturn.v);
add_assoc_double(return_value, "v", pntReturn.u);
}
/************************************************************************/
/* DLEXPORT void php_proj_pj_transform(INTERNAL_FUNCTION_PARAMETERS) */
/* */
/* Transform coordinates from source projection to destination */
/* projection. */
/* */
/* Parameters : */
/* */
/* - PJ *srcdefn, */
/* - PJ *dstdefn, */
/* - double x */
/* - double y */
/* */
/************************************************************************/
DLEXPORT void php_proj_pj_transform(INTERNAL_FUNCTION_PARAMETERS)
{
HashTable *list=NULL;
pval *p1, *p2;
pval *pjin, *pjout = NULL;
PJ *in = NULL;
PJ *out = NULL;
projUV pnt = {0, 0};
double z = 0;
int error = -1;
/* -------------------------------------------------------------------- */
/* extract parameters. */
/* -------------------------------------------------------------------- */
if (getParameters(ht, 4, &pjin , &pjout, &p1, &p2) != SUCCESS) {
WRONG_PARAM_COUNT;
}
/* -------------------------------------------------------------------- */
/* initilize return array. */
/* -------------------------------------------------------------------- */
if (array_init(return_value) == FAILURE) {
RETURN_FALSE;
}
convert_to_double(p1);
convert_to_double(p2);
in = (PJ *)_phpms_fetch_handle(pjin,
PHPMS_GLOBAL(le_projobj), list TSRMLS_CC);
out = (PJ *)_phpms_fetch_handle(pjout,
PHPMS_GLOBAL(le_projobj), list TSRMLS_CC);
if (in && out) {
pnt.u = p1->value.dval;
pnt.v = p2->value.dval;
if( pj_is_latlong(in) ) {
pnt.u *= DEG_TO_RAD;
pnt.v *= DEG_TO_RAD;
}
error = pj_transform(in, out, 1, 0,
&(pnt.u), &(pnt.v), &z );
if( pj_is_latlong(out) ) {
pnt.u *= RAD_TO_DEG;
pnt.v *= RAD_TO_DEG;
}
}
if (error) {
php_error(E_ERROR,"Error in pj_transform");
RETURN_LONG(-1);
} else {
add_assoc_double(return_value, "u", pnt.u);
add_assoc_double(return_value, "v", pnt.v);
}
}
/************************************************************************/
/* DLEXPORT */
/* void php_proj_pj_datum_transform(INTERNAL_FUNCTION_PARAMETERS) */
/* */
/* Datum from source projection to destination */
/* projection. */
/* */
/* Parameters : */
/* */
/* - PJ *srcdefn, */
/* - PJ *dstdefn, */
/* - double x */
/* - double y */
/* */
/************************************************************************/
DLEXPORT void php_proj_pj_datum_transform(INTERNAL_FUNCTION_PARAMETERS)
{
HashTable *list=NULL;
pval *p1, *p2;
pval *pjin, *pjout = NULL;
PJ *in = NULL;
PJ *out = NULL;
projUV pnt = {0, 0};
double z = 0;
int error = -1;
/* -------------------------------------------------------------------- */
/* extract parameters. */
/* -------------------------------------------------------------------- */
if (getParameters(ht, 4, &pjin , &pjout, &p1, &p2) != SUCCESS) {
WRONG_PARAM_COUNT;
}
/* -------------------------------------------------------------------- */
/* initilize return array. */
/* -------------------------------------------------------------------- */
if (array_init(return_value) == FAILURE) {
RETURN_FALSE;
}
convert_to_double(p1);
convert_to_double(p2);
in = (PJ *)_phpms_fetch_handle(pjin,
PHPMS_GLOBAL(le_projobj), list TSRMLS_CC);
out = (PJ *)_phpms_fetch_handle(pjout,
PHPMS_GLOBAL(le_projobj), list TSRMLS_CC);
if (in && out) {
pnt.u = p1->value.dval;
pnt.v = p2->value.dval;
if( pj_is_latlong(in) ) {
pnt.u *= DEG_TO_RAD;
pnt.v *= DEG_TO_RAD;
}
error = pj_transform(in, out, 1, 0,
&(pnt.u), &(pnt.v), &z );
if (!error) {
if( pj_is_latlong(out) ) {
pnt.u *= RAD_TO_DEG;
pnt.v *= RAD_TO_DEG;
}
}
}
if (error) {
php_error(E_ERROR,"Error in pj_datum_transform");
RETURN_LONG(-1);
} else {
add_assoc_double(return_value, "u", pnt.u);
add_assoc_double(return_value, "v", pnt.v);
}
}
/************************************************************************/
/* DLEXPORT void php_proj_pj_free(INTERNAL_FUNCTION_PARAMETERS) */
/************************************************************************/
DLEXPORT void php_proj_pj_free(INTERNAL_FUNCTION_PARAMETERS)
{
/* ==================================================================== */
/* TODO : freeing does not work properly on PHP4. */
/* ==================================================================== */
#ifdef PHP4_BAD_FREEING
HashTable *list=NULL;
pval *pj = NULL;
PJ *popj = NULL;
/* -------------------------------------------------------------------- */
/* extract parameters. */
/* -------------------------------------------------------------------- */
if (getParameters(ht, 1, &pj) != SUCCESS) {
WRONG_PARAM_COUNT;
}
popj = (PJ *)_phpms_fetch_handle(pj,
PHPMS_GLOBAL(le_projobj), list TSRMLS_CC);
if (popj) {
pj_free(popj);
}
#endif
}
#endif /* USE_PROJ */