netcdf-c/libdispatch/ddispatch.c
Dennis Heimbigner d538cf38c2 Fix nczarr-experimental to better support CMake and find AWS libraries
The primary fix is to improve CMake build support.
Specific changes include:
* CMake: Provide a better soln to locating the AWS SDK
  libraries; the new way is the preferred method as described in
  the aws-cpp-sdk documentation.
* CMake (and Automake): allow -DENABLE_S3_SDK (default off) to suppress
  looking for AWS libraries.
* CMake: add the complete set of nczarr tests
* CMake: add EXTERNL as needed to various .h files.
* Improve support for windows drive letters in paths.
* Add nczarr and s3 flags to nc-config
* For VisualStudio X nczarr, cleanup the NAN+INFINITY handling
* Convert _MSC_VER -> _WIN32 and vice versa as needed
* NCZarr - support multiple platform paths including windows, cygwin.
  mingw, etc.
* NCZarr - sort the test outputs because different platforms
  produce directory contents in different orders.

One big change concerns netcdf-c/CMakeLists.txt and netcdf-c/configure.ac.
In the current versions, it was the case that --disable-hdf5
disabled netcdf-4 (libsrc4). With nczarr, this can no longer
be the case because nczarr requires libsrc4 even if libhdf5
is disabled. So, I modified the above files to move the
format options (HDF5, NCZarr, HDF4, etc) to a single place
near the front of the files. Now it is the case that:
* Enabling any of the formats that require libsrc4
  also does an implicit --enable-netcdf4.
* --disable-netcdf4 | --disable-netcdf-4 now becomes
  and alias for --disable-hdf5.

There are probably some bugs in this change in terms of
dependencies between format options.

Problems:
* CMake S3 support is still not working for Visual Studio
* A recent issue points out that there is work to do on handling
  UTF8 filenames, but that will be addressed in a separate fix.

Notes:
* Consider converting all of our includes/.h files to use EXTERNL
2020-07-12 12:21:56 -06:00

145 lines
3.3 KiB
C

/*
Copyright (c) 1998-2018 University Corporation for Atmospheric Research/Unidata
See LICENSE.txt for license information.
*/
#include "config.h"
#include "ncdispatch.h"
#include "ncuri.h"
#include "nclog.h"
#include "ncbytes.h"
#include "ncrc.h"
#include "ncoffsets.h"
/* Required for getcwd, other functions. */
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
/* Required for getcwd, other functions. */
#ifdef _WIN32
#include <direct.h>
#define getcwd _getcwd
#endif
#if defined(ENABLE_BYTERANGE) || defined(ENABLE_DAP) || defined(ENABLE_DAP4)
#include <curl/curl.h>
#endif
/* Define vectors of zeros and ones for use with various nc_get_varX functions */
/* Note, this form of initialization fails under Cygwin */
size_t NC_coord_zero[NC_MAX_VAR_DIMS] = {0};
size_t NC_coord_one[NC_MAX_VAR_DIMS] = {1};
ptrdiff_t NC_stride_one[NC_MAX_VAR_DIMS] = {1};
NCRCglobalstate ncrc_globalstate;
/*
static nc_type longtype = (sizeof(long) == sizeof(int)?NC_INT:NC_INT64);
static nc_type ulongtype = (sizeof(unsigned long) == sizeof(unsigned int)?NC_UINT:NC_UINT64);
*/
/* Allow dispatch to do general initialization and finalization */
int
NCDISPATCH_initialize(void)
{
int status = NC_NOERR;
int i;
NCRCglobalstate* globalstate = NULL;
for(i=0;i<NC_MAX_VAR_DIMS;i++) {
NC_coord_zero[i] = 0;
NC_coord_one[i] = 1;
NC_stride_one[i] = 1;
}
globalstate = ncrc_getglobalstate(); /* will allocate and clear */
/* Capture temp dir*/
{
char* tempdir;
char* p;
char* q;
char cwd[4096];
#ifdef _WIN32
tempdir = getenv("TEMP");
#else
tempdir = "/tmp";
#endif
if(tempdir == NULL) {
fprintf(stderr,"Cannot find a temp dir; using ./\n");
tempdir = getcwd(cwd,sizeof(cwd));
if(tempdir == NULL || *tempdir == '\0') tempdir = ".";
}
globalstate->tempdir= (char*)malloc(strlen(tempdir) + 1);
for(p=tempdir,q=globalstate->tempdir;*p;p++,q++) {
if((*p == '/' && *(p+1) == '/')
|| (*p == '\\' && *(p+1) == '\\')) {p++;}
*q = *p;
}
*q = '\0';
#ifdef _WIN32
#else
/* Canonicalize */
for(p=globalstate->tempdir;*p;p++) {
if(*p == '\\') {*p = '/'; };
}
*q = '\0';
#endif
}
/* Capture $HOME */
{
char* p;
char* q;
char* home = getenv("HOME");
if(home == NULL) {
/* use tempdir */
home = globalstate->tempdir;
}
globalstate->home = (char*)malloc(strlen(home) + 1);
for(p=home,q=globalstate->home;*p;p++,q++) {
if((*p == '/' && *(p+1) == '/')
|| (*p == '\\' && *(p+1) == '\\')) {p++;}
*q = *p;
}
*q = '\0';
#ifdef _WIN32
#else
/* Canonicalize */
for(p=home;*p;p++) {
if(*p == '\\') {*p = '/'; };
}
#endif
}
/* Now load RC File */
status = NC_rcload();
ncloginit();
/* Compute type alignments */
NC_compute_alignments();
/* Initialize curl if it is being used */
#if defined(ENABLE_BYTERANGE) || defined(ENABLE_DAP) || defined(ENABLE_DAP4)
{
CURLcode cstat = curl_global_init(CURL_GLOBAL_ALL);
if(cstat != CURLE_OK)
status = NC_ECURL;
}
#endif
return status;
}
int
NCDISPATCH_finalize(void)
{
int status = NC_NOERR;
ncrc_freeglobalstate();
#if defined(ENABLE_BYTERANGE) || defined(ENABLE_DAP) || defined(ENABLE_DAP4)
curl_global_cleanup();
#endif
return status;
}