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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdbool.h>
#include <stdio.h>
#include "cdi.h"
#include "cksum.h"
#include "stream_cksum.h"
#include "dmemory.h"
const char *zaxisNamePtr(int zaxistype);
struct cksum_table *
cksum_stream(const char *fname, size_t *table_len)
{
int nvars;
uint32_t *checksum_state = NULL;
enum directionZ
{
DIRECTION_DOWN = 1,
DIRECTION_NONE,
DIRECTION_UP
};
struct var_desc_t
{
int x, y, z;
enum directionZ zDirection;
int code;
size_t chars;
} *varDesc = NULL;
size_t var_size_max_chars = 0;
double *buf = NULL;
struct cksum_table *file_vars = NULL;
do {
// Open the dataset
int streamID = streamOpenRead(fname);
if (streamID < 0)
{
fprintf(stderr, "Cannot open data input file %s: %s\n", fname, cdiStringError(streamID));
nvars = -1;
break;
}
// Get the variable list of the dataset
int vlistID = streamInqVlist(streamID);
int fileType = streamInqFiletype(streamID);
bool isLegacyFile = fileType == CDI_FILETYPE_SRV || fileType == CDI_FILETYPE_EXT;
nvars = vlistNvars(vlistID);
int ngrids = vlistNumGrids(vlistID);
int nzaxis = vlistNumZaxis(vlistID);
if (nzaxis < 0 || ngrids < 0)
{
fprintf(stderr, "Error in grid/zaxis count query %d:%d\n", ngrids, nzaxis);
nvars = -1;
break;
}
checksum_state = (uint32_t *) Calloc((size_t) nvars, sizeof(checksum_state[0]));
varDesc = (struct var_desc_t *) Malloc((size_t) nvars * sizeof(varDesc[0]));
for (int varIdx = 0; varIdx < nvars; ++varIdx)
{
int grid = vlistInqVarGrid(vlistID, varIdx), gridType, varCode = vlistInqVarCode(vlistID, varIdx);
varDesc[varIdx].code = varCode;
int zaxisID = vlistInqVarZaxis(vlistID, varIdx);
if (grid == CDI_UNDEFID || zaxisID == CDI_UNDEFID)
{
fputs("error in axis/grid inquiry\n", stderr);
nvars = -1;
break;
}
int zSize;
if ((zSize = varDesc[varIdx].z = zaxisInqSize(zaxisID)) <= 0)
{
fputs("invalid Z-axis found\n", stderr);
nvars = -1;
break;
}
if (isLegacyFile)
varDesc[varIdx].zDirection = DIRECTION_NONE;
else if (zSize > 1)
{
double lev[2];
for (int levIdx = 0; levIdx < 2; ++levIdx) lev[levIdx] = zaxisInqLevel(zaxisID, levIdx);
int zaxistype = zaxisInqType(zaxisID);
switch (zaxistype)
{
case ZAXIS_PRESSURE:
if (lev[0] < lev[1])
varDesc[varIdx].zDirection = DIRECTION_DOWN;
else if (lev[1] < lev[0])
varDesc[varIdx].zDirection = DIRECTION_UP;
else
{
fprintf(stderr,
"unexpected level ordering on z-Axis for variable"
" code %d found: lev[0]=%g, lev[1]=%g\n",
varCode, lev[0], lev[1]);
nvars = -1;
}
break;
default:
fprintf(stderr,
"unexpected type of z-Axis for variable"
" code %d found: %s\n",
varCode, zaxisNamePtr(zaxistype));
nvars = -1;
}
}
else
varDesc[varIdx].zDirection = DIRECTION_NONE;
if (nvars == -1) break;
if ((gridType = gridInqType(grid)) != GRID_LONLAT && gridType != GRID_GENERIC && gridType != GRID_CURVILINEAR)
{
fprintf(stderr, "unexpected non-lonlat grid found: %d\n", gridType);
nvars = -1;
break;
}
if ((varDesc[varIdx].x = gridInqXsize(grid)) < 0)
{
fprintf(stderr, "invalid X-size found: %d\n", varDesc[varIdx].x);
nvars = -1;
break;
}
if (varDesc[varIdx].x == 0) varDesc[varIdx].x = 1;
if ((varDesc[varIdx].y = gridInqYsize(grid)) < 0)
{
fprintf(stderr, "invalid Y-size found: %d\n", varDesc[varIdx].y);
nvars = -1;
break;
}
if (varDesc[varIdx].y == 0) varDesc[varIdx].y = 1;
varDesc[varIdx].chars = (size_t) varDesc[varIdx].x * (size_t) varDesc[varIdx].y * (size_t) varDesc[varIdx].z * sizeof(buf[0]);
if (var_size_max_chars < varDesc[varIdx].chars) var_size_max_chars = varDesc[varIdx].chars;
}
buf = (double *) Malloc(var_size_max_chars);
if (nvars == -1) break;
// Get the Time axis from the variable list
int taxisID = vlistInqTaxis(vlistID);
int tsID = 0;
// Inquire the time step
while (streamInqTimestep(streamID, tsID))
{
// Get the verification date and time
int vdatetime[2] = { taxisInqVtime(taxisID), (int) taxisInqVdate(taxisID) };
// Read var1 and var2
for (int varIdx = 0; varIdx < nvars; ++varIdx)
{
SizeType nmiss;
streamReadVar(streamID, varIdx, buf, &nmiss);
memcrc_r(checksum_state + varIdx, (const unsigned char *) vdatetime, sizeof(vdatetime));
if (varDesc[varIdx].zDirection == DIRECTION_UP || varDesc[varIdx].zDirection == DIRECTION_NONE)
memcrc_r(checksum_state + varIdx, (const unsigned char *) buf, varDesc[varIdx].chars);
else
{
size_t nlev = (size_t) varDesc[varIdx].z,
charsPerLev = (size_t) varDesc[varIdx].x * (size_t) varDesc[varIdx].y * sizeof(buf[0]);
for (size_t lev = 0; lev < nlev; ++lev)
memcrc_r(checksum_state + varIdx, (const unsigned char *) buf + (nlev - lev - 1) * charsPerLev, charsPerLev);
}
}
++tsID;
}
file_vars = (struct cksum_table *) Malloc((size_t) nvars * sizeof(file_vars[0]));
for (int varIdx = 0; varIdx < nvars; ++varIdx)
{
file_vars[varIdx].code = varDesc[varIdx].code;
file_vars[varIdx].cksum
= memcrc_finish(checksum_state + varIdx, (off_t) ((varDesc[varIdx].chars + sizeof(int) * 2) * (size_t) tsID));
}
// Close the input stream
streamClose(streamID);
} while (0);
// free resources
free(checksum_state);
free(varDesc);
free(buf);
*table_len = (size_t) nvars;
return file_vars;
}
/*
* Local Variables:
* c-file-style: "Java"
* c-basic-offset: 2
* indent-tabs-mode: nil
* show-trailing-whitespace: t
* require-trailing-newline: t
* End:
*/
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