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mirror of https://github.com/Unidata/netcdf-c.git synced 2025-02-11 16:40:36 +08:00
netcdf-c/libsrc/t_ncio.c
Dennis Heimbigner 3db4f013bf Primary change: add dap4 support
Specific changes:
1. Add dap4 code: libdap4 and dap4_test.
   Note that until the d4ts server problem is solved, dap4 is turned off.
2. Modify various files to support dap4 flags:
	configure.ac, Makefile.am, CMakeLists.txt, etc.
3. Add nc_test/test_common.sh. This centralizes
   the handling of the locations of various
   things in the build tree: e.g. where is
   ncgen.exe located. See nc_test/test_common.sh
   for details.
4. Modify .sh files to use test_common.sh
5. Obsolete separate oc2 by moving it to be part of
   netcdf-c. This means replacing code with netcdf-c
   equivalents.
5. Add --with-testserver to configure.ac to allow
   override of the servers to be used for --enable-dap-remote-tests.
6. There were multiple versions of nctypealignment code. Try to
   centralize in libdispatch/doffset.c and include/ncoffsets.h
7. Add a unit test for the ncuri code because of its complexity.
8. Move the findserver code out of libdispatch and into
   a separate, self contained program in ncdap_test and dap4_test.
9. Move the dispatch header files (nc{3,4}dispatch.h) to
   .../include because they are now shared by modules.
10. Revamp the handling of TOPSRCDIR and TOPBUILDDIR for shell scripts.
11. Make use of MREMAP if available
12. Misc. minor changes e.g.
	- #include <config.h> -> #include "config.h"
	- Add some no-install headers to /include
	- extern -> EXTERNL and vice versa as needed
	- misc header cleanup
	- clean up checking for misc. unix vs microsoft functions
13. Change copyright decls in some files to point to LICENSE file.
14. Add notes to RELEASENOTES.md
2017-03-08 17:01:10 -07:00

374 lines
7.3 KiB
C

/*
* Copyright 1995, University Corporation for Atmospheric Research
* See top level COPYRIGHT file for copying and redistribution conditions.
*/
/* $Id: t_ncio.c,v 1.10 2010/05/26 11:11:26 ed Exp $ */
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <assert.h>
#include "ncio.h"
#ifndef NC_NOERR
#define NC_NOERR 0
#endif
static void
usage(const char *av0)
{
(void)fprintf(stderr,
"Usage: %s [options] fname\t\nOptions:\n", av0);
(void)fprintf(stderr,
"\t-v Verbose\n") ;
(void)fprintf(stderr,
"\t-w Open Read/Write, default is read only\n") ;
(void)fprintf(stderr,
"\t-c Create, clobber existing\n") ;
(void)fprintf(stderr,
"\t-n Create, error if it already exists\n") ;
(void)fprintf(stderr,
"\t-L Use locking if available\n") ;
(void)fprintf(stderr,
"\t-S Share updates (turn off caching)\n") ;
(void)fprintf(stderr,
"\t-U Delete (unlink) on close\n") ;
(void)fprintf(stderr,
"\t-o igeto Initial get offset\n") ;
(void)fprintf(stderr,
"\t-i igetsz Initial get size\n") ;
(void)fprintf(stderr,
"\t-I initialsz Initial file size for create\n") ;
(void)fprintf(stderr,
"\t-s sizehint Buffer size\n") ;
exit(EXIT_FAILURE);
}
static long
argscale(const char *arg, const char *tag)
{
long value = 0;
/* last character */
const char *cp = arg + strlen(arg) -1;
value = atol(arg);
if(isalpha(*cp))
{
switch(*cp) {
case 'k':
case 'K':
value *= 1024;
break;
case 'm':
case 'M':
value *= (1024*1024);
break;
default:
value = 0; /* trigger error below */
break;
}
}
if(value == 0)
{
fprintf(stderr,
"Illegal %s \"%s\", ignored\n", tag, arg);
}
return value;
}
static void
modify_ex(off_t offset, size_t extent, void *vp)
{
unsigned char *obuf = vp;
const unsigned char *const end = &obuf[extent];
unsigned char *cp = obuf;
if(cp >= end) return;
*cp++ = (unsigned char)( offset >> 24);
if(cp >= end) return;
*cp++ = (unsigned char)((offset & 0x00ff0000) >> 16);
if(cp >= end) return;
*cp++ = (unsigned char)((offset & 0x0000ff00) >> 8);
if(cp >= end) return;
*cp++ = (unsigned char)( offset & 0x000000ff);
if(cp >= end) return;
*cp++ = (unsigned char)( extent >> 24);
if(cp >= end) return;
*cp++ = (unsigned char)((extent & 0x00ff0000) >> 16);
if(cp >= end) return;
*cp++ = (unsigned char)((extent & 0x0000ff00) >> 8);
if(cp >= end) return;
*cp++ = (unsigned char)( extent & 0x000000ff);
while(cp < end)
{
*cp++ = (unsigned char) (cp - obuf);
}
}
typedef struct riu {
struct riu *next;
struct riu *prev;
off_t offset;
size_t extent;
void *vp;
} riu;
static void
free_riu(riu *riup)
{
if(riup == NULL)
return;
free(riup);
}
static riu *
new_riu(off_t offset, size_t extent, void *vp)
{
riu *riup = (riu *)malloc(sizeof(riu));
if(riup == NULL)
{
fprintf(stderr,
"new_riu: malloc failed\n");
exit(EXIT_FAILURE);
}
riup->next = NULL;
riup->prev = NULL;
riup->offset = offset;
riup->extent = extent;
riup->vp = vp;
return riup;
}
static riu *stack = NULL;
static void
riu_push(off_t offset, size_t extent, void *vp)
{
riu *riup = new_riu(offset, extent, vp);
/* assert(riup != NULL); */
riup->next = stack;
if(stack != NULL)
stack->prev = riup;
stack = riup;
}
static int
riu_pop(off_t offset, int modify)
{
riu *riup = stack;
while(riup != NULL)
{
if(riup->offset == offset)
{
if(modify)
{
modify_ex(riup->offset, riup->extent, riup->vp);
}
if(riup->next != NULL)
{
riup->next->prev = riup->prev;
}
if(riup == stack)
{
stack = riup->next;
}
else
{
assert(riup->prev != NULL);
riup->prev->next = riup->next;
}
free_riu(riup);
return 1;
}
riup = riup->next;
}
/* else, not found */
return 0;
}
main(int ac, char *av[])
{
char *path = "";
ncio *nciop;
char linebuf[128];
off_t offset;
size_t extent;
void *vp;
int status = NC_NOERR;
int verbose = 0;
int flags = 0;
int create = 0;
off_t igeto = 0;
size_t igetsz = 0;
size_t initialsz = 0;
int doUnlink = 0;
size_t sizehint = NC_SIZEHINT_DEFAULT;
{
extern int optind;
extern int opterr;
extern char *optarg;
int ch;
opterr = 1;
while ((ch = getopt(ac, av, "vwcnLSUo:i:I:s:")) != EOF)
switch (ch) {
case 'v':
verbose = 1;
break;
case 'w':
flags |= NC_WRITE;
break;
case 'c':
create = 1;
break;
case 'n':
create = 1;
flags |= NC_NOCLOBBER;
break;
case 'L':
flags |= NC_LOCK;
break;
case 'S':
flags |= NC_SHARE;
break;
case 'U':
doUnlink = 1;
break;
case 'o':
igeto = argscale(optarg, "igeto");
break;
case 'i':
igetsz = argscale(optarg, "igetsz");
break;
case 'I':
initialsz = argscale(optarg, "initialsz");
break;
case 's':
sizehint = argscale(optarg, "sizehint");
break;
case '?':
usage(av[0]);
break;
}
/* last arg, the file name, is required */
if(ac - optind <= 0)
usage(av[0]) ;
path = av[optind];
}
if(!create)
{
status = ncio_open(path, flags,
igeto, igetsz, &sizehint,
&nciop, &vp);
if(status != NC_NOERR)
{
fprintf(stderr, "ncio_open: %s: %s\n",
path, strerror(status));
return(EXIT_FAILURE);
}
} else {
status = ncio_create(path, flags, initialsz,
igeto, igetsz, &sizehint,
&nciop, &vp);
if(status != NC_NOERR)
{
fprintf(stderr, "ncio_create: %s: %s\n",
path, strerror(status));
return(EXIT_FAILURE);
}
}
while(fgets(linebuf, sizeof(linebuf), stdin) != NULL)
{
offset = 0;
extent = 0;
if(*linebuf == '#')
continue; /* comment */
if(sscanf(linebuf, "rel 0x%lx", &offset) == 1
|| sscanf(linebuf, "rel %ld", &offset) == 1)
{
if(verbose)
printf("- rel %8ld\n", offset);
if(!riu_pop(offset, 0))
continue;
status = nciop->rel(nciop, offset, 0);
if(status)
{
fprintf(stderr, "- rel error: %s\n",
strerror(status));
continue;
}
}
else if(sscanf(linebuf, "relm 0x%lx", &offset) == 1
|| sscanf(linebuf, "relm %ld", &offset) == 1)
{
if(verbose)
printf("- relm %8ld\n", offset);
if(!riu_pop(offset, 1))
continue;
status = nciop->rel(nciop, offset, RGN_MODIFIED);
if(status)
{
fprintf(stderr, "- relm %8ld error: %s\n",
offset, strerror(status));
continue;
}
}
else if(sscanf(linebuf, "get 0x%lx %ld", &offset, &extent) == 2
|| sscanf(linebuf, "get %ld %ld", &offset, &extent) == 2)
{
if(verbose)
printf("- get %10ld %8ld\n", offset, extent);
status = nciop->get(nciop, offset, extent, 0, &vp);
if(status)
{
fprintf(stderr, "- get error: %s\n",
strerror(status));
continue;
}
riu_push(offset, extent, vp);
}
else if(sscanf(linebuf, "getw 0x%lx %ld", &offset, &extent) == 2
|| sscanf(linebuf, "getw %ld %ld", &offset, &extent) == 2)
{
if(verbose)
printf("- getw %10ld %8ld\n", offset, extent);
status = nciop->get(nciop, offset, extent, RGN_WRITE, &vp);
if(status)
{
fprintf(stderr, "- getw error: %s\n",
strerror(status));
continue;
}
riu_push(offset, extent, vp);
}
else if(strchr(linebuf, 'q') != NULL)
break;
else
printf("???\n");
}
status = ncio_close(nciop, doUnlink);
if(status != NC_NOERR)
{
fprintf(stderr, "ncio_close(%s): %s: %s\n",
doUnlink ? "doUnlink" : "",
path, strerror(status));
return(EXIT_FAILURE);
}
return(EXIT_SUCCESS);
}