/*! This function determines onto how many files a given snapshot is
* distributed.
*/
int find_files(char *fname)
{
FILE *fd;
char buf[200], buf1[200];
int dummy;
sprintf(buf, "%s.%d", fname, 0);
sprintf(buf1, "%s", fname);
if(All.ICFormat == 3)
{
sprintf(buf, "%s.%d.hdf5", fname, 0);
sprintf(buf1, "%s.hdf5", fname);
}
#ifndef HAVE_HDF5
if(All.ICFormat == 3)
{
if(ThisTask == 0)
printf("Code wasn't compiled with HDF5 support enabled!\n");
endrun(0);
}
#endif
header.num_files = 0;
if(ThisTask == 0)
{
if((fd = fopen(buf, "r")))
{
if(All.ICFormat == 1 || All.ICFormat == 2)
{
if(All.ICFormat == 2)
{
fread(&dummy, sizeof(dummy), 1, fd);
fread(&dummy, sizeof(dummy), 1, fd);
fread(&dummy, sizeof(dummy), 1, fd);
fread(&dummy, sizeof(dummy), 1, fd);
}
fread(&dummy, sizeof(dummy), 1, fd);
fread(&header, sizeof(header), 1, fd);
fread(&dummy, sizeof(dummy), 1, fd);
}
fclose(fd);
#ifdef HAVE_HDF5
if(All.ICFormat == 3)
read_header_attributes_in_hdf5(buf);
#endif
}
}
MPI_Bcast(&header, sizeof(header), MPI_BYTE, 0, MPI_COMM_WORLD);
if(header.num_files > 0)
return header.num_files;
if(ThisTask == 0)
{
if((fd = fopen(buf1, "r")))
{
if(All.ICFormat == 1 || All.ICFormat == 2)
{
if(All.ICFormat == 2)
{
fread(&dummy, sizeof(dummy), 1, fd);
fread(&dummy, sizeof(dummy), 1, fd);
fread(&dummy, sizeof(dummy), 1, fd);
fread(&dummy, sizeof(dummy), 1, fd);
}
fread(&dummy, sizeof(dummy), 1, fd);
fread(&header, sizeof(header), 1, fd);
fread(&dummy, sizeof(dummy), 1, fd);
}
fclose(fd);
#ifdef HAVE_HDF5
if(All.ICFormat == 3)
read_header_attributes_in_hdf5(buf1);
#endif
header.num_files = 1;
}
}
MPI_Bcast(&header, sizeof(header), MPI_BYTE, 0, MPI_COMM_WORLD);
if(header.num_files > 0)
return header.num_files;
if(ThisTask == 0)
{
printf("\nCan't find initial conditions file.");
printf("neither as '%s'\nnor as '%s'\n", buf, buf1);
fflush(stdout);
}
endrun(0);
return 0;
}
/*! This function reads a snapshot file and distributes the data it contains
* to tasks 'readTask' to 'lastTask'.
*/
void read_file(char *fname, int readTask, int lastTask)
{
int blockmaxlen;
int i, n_in_file, n_for_this_task, ntask, pc, offset = 0, task;
int blksize1, blksize2;
MPI_Status status;
FILE *fd = 0;
int nall, nread;
int type, bnr;
char label[4], expected_label[4], buf[500];
int nstart, bytes_per_blockelement, npart, nextblock, typelist[6];
enum iofields blocknr;
size_t bytes;
#ifdef HAVE_HDF5
int rank, pcsum;
hid_t hdf5_file = 0, hdf5_grp[6], hdf5_dataspace_in_file;
hid_t hdf5_datatype = 0, hdf5_dataspace_in_memory, hdf5_dataset;
hsize_t dims[2], count[2], start[2];
#endif
#if defined(COSMIC_RAYS) && (!defined(CR_IC))
int CRpop;
#endif
#define SKIP {my_fread(&blksize1,sizeof(int),1,fd);}
#define SKIP2 {my_fread(&blksize2,sizeof(int),1,fd);}
if(ThisTask == readTask)
{
if(All.ICFormat == 1 || All.ICFormat == 2)
{
if(!(fd = fopen(fname, "r")))
{
printf("can't open file `%s' for reading initial conditions.\n", fname);
endrun(123);
}
if(All.ICFormat == 2)
{
SKIP;
#ifdef AUTO_SWAP_ENDIAN_READIC
swap_file = blksize1;
#endif
my_fread(&label, sizeof(char), 4, fd);
my_fread(&nextblock, sizeof(int), 1, fd);
#ifdef AUTO_SWAP_ENDIAN_READIC
swap_Nbyte((char *) &nextblock, 1, 4);
#endif
printf("Reading header => '%c%c%c%c' (%d byte)\n", label[0], label[1], label[2], label[3],
nextblock);
SKIP2;
}
SKIP;
#ifdef AUTO_SWAP_ENDIAN_READIC
if(All.ICFormat == 1)
{
if(blksize1 != 256)
swap_file = 1;
}
#endif
my_fread(&header, sizeof(header), 1, fd);
SKIP2;
#ifdef AUTO_SWAP_ENDIAN_READIC
swap_Nbyte((char *) &blksize1, 1, 4);
swap_Nbyte((char *) &blksize2, 1, 4);
#endif
if(blksize1 != 256 || blksize2 != 256)
{
printf("incorrect header format\n");
fflush(stdout);
endrun(890);
/* Probable error is wrong size of fill[] in header file. Needs to be 256 bytes in total. */
}
#ifdef AUTO_SWAP_ENDIAN_READIC
swap_header();
#endif
}
#ifdef HAVE_HDF5
if(All.ICFormat == 3)
{
read_header_attributes_in_hdf5(fname);
hdf5_file = H5Fopen(fname, H5F_ACC_RDONLY, H5P_DEFAULT);
for(type = 0; type < 6; type++)
{
if(header.npart[type] > 0)
{
sprintf(buf, "/PartType%d", type);
hdf5_grp[type] = H5Gopen(hdf5_file, buf);
}
}
}
#endif
for(task = readTask + 1; task <= lastTask; task++)
{
MPI_Ssend(&header, sizeof(header), MPI_BYTE, task, TAG_HEADER, MPI_COMM_WORLD);
#ifdef AUTO_SWAP_ENDIAN_READIC
MPI_Ssend(&swap_file, sizeof(int), MPI_INT, task, TAG_SWAP, MPI_COMM_WORLD);
#endif
}
}
else
{
MPI_Recv(&header, sizeof(header), MPI_BYTE, readTask, TAG_HEADER, MPI_COMM_WORLD, &status);
#ifdef AUTO_SWAP_ENDIAN_READIC
MPI_Recv(&swap_file, sizeof(int), MPI_INT, readTask, TAG_SWAP, MPI_COMM_WORLD, &status);
#endif
}
#ifdef INPUT_IN_DOUBLEPRECISION
if(header.flag_doubleprecision == 0)
{
if(ThisTask == 0)
printf
("\nProblem: Code compiled with INPUT_IN_DOUBLEPRECISION, but input files are in single precision!\n");
endrun(11);
}
#else
if(header.flag_doubleprecision)
{
if(ThisTask == 0)
printf
("\nProblem: Code not compiled with INPUT_IN_DOUBLEPRECISION, but input files are in double precision!\n");
endrun(10);
}
#endif
if(All.TotNumPart == 0)
{
if(header.num_files <= 1)
for(i = 0; i < 6; i++)
{
header.npartTotal[i] = header.npart[i];
#ifdef SFR
header.npartTotalHighWord[i] = 0;
#endif
}
All.TotN_gas = header.npartTotal[0] + (((long long) header.npartTotalHighWord[0]) << 32);
for(i = 0, All.TotNumPart = 0; i < 6; i++)
{
All.TotNumPart += header.npartTotal[i];
All.TotNumPart += (((long long) header.npartTotalHighWord[i]) << 32);
}
#ifdef GENERATE_GAS_IN_ICS
if(RestartFlag == 0)
{
All.TotN_gas += header.npartTotal[1];
All.TotNumPart += header.npartTotal[1];
}
#endif
for(i = 0; i < 6; i++)
All.MassTable[i] = header.mass[i];
All.MaxPart = (int) (All.PartAllocFactor * (All.TotNumPart / NTask)); /* sets the maximum number of particles that may */
#ifdef GASRETURN
All.MaxPartSph = (int) (All.PartAllocFactor * (All.TotNumPart / NTask)); /* sets the maximum number of particles that may */
#else
All.MaxPartSph = (int) (All.PartAllocFactor * (All.TotN_gas / NTask)); /* sets the maximum number of particles that may */
#endif
#ifdef INHOMOG_GASDISTR_HINT
All.MaxPartSph = All.MaxPart;
#endif
allocate_memory();
if(!(CommBuffer = mymalloc(bytes = All.BufferSize * 1024 * 1024)))
{
printf("failed to allocate memory for `CommBuffer' (%g MB).\n", bytes / (1024.0 * 1024.0));
endrun(2);
}
if(RestartFlag >= 2)
All.Time = All.TimeBegin = header.time;
}
if(ThisTask == readTask)
{
for(i = 0, n_in_file = 0; i < 6; i++)
n_in_file += header.npart[i];
printf("\nreading file `%s' on task=%d (contains %d particles.)\n"
"distributing this file to tasks %d-%d\n"
"Type 0 (gas): %8d (tot=%6d%09d) masstab=%g\n"
"Type 1 (halo): %8d (tot=%6d%09d) masstab=%g\n"
"Type 2 (disk): %8d (tot=%6d%09d) masstab=%g\n"
"Type 3 (bulge): %8d (tot=%6d%09d) masstab=%g\n"
"Type 4 (stars): %8d (tot=%6d%09d) masstab=%g\n"
"Type 5 (bndry): %8d (tot=%6d%09d) masstab=%g\n\n", fname, ThisTask, n_in_file, readTask,
lastTask, header.npart[0], (int) (header.npartTotal[0] / 1000000000),
(int) (header.npartTotal[0] % 1000000000), All.MassTable[0], header.npart[1],
(int) (header.npartTotal[1] / 1000000000), (int) (header.npartTotal[1] % 1000000000),
All.MassTable[1], header.npart[2], (int) (header.npartTotal[2] / 1000000000),
(int) (header.npartTotal[2] % 1000000000), All.MassTable[2], header.npart[3],
(int) (header.npartTotal[3] / 1000000000), (int) (header.npartTotal[3] % 1000000000),
All.MassTable[3], header.npart[4], (int) (header.npartTotal[4] / 1000000000),
(int) (header.npartTotal[4] % 1000000000), All.MassTable[4], header.npart[5],
(int) (header.npartTotal[5] / 1000000000), (int) (header.npartTotal[5] % 1000000000),
All.MassTable[5]);
fflush(stdout);
}
ntask = lastTask - readTask + 1;
/* to collect the gas particles all at the beginning (in case several
snapshot files are read on the current CPU) we move the collisionless
particles such that a gap of the right size is created */
for(type = 0, nall = 0; type < 6; type++)
{
n_in_file = header.npart[type];
n_for_this_task = n_in_file / ntask;
if((ThisTask - readTask) < (n_in_file % ntask))
n_for_this_task++;
if(type == 0)
{
if(N_gas + n_for_this_task > All.MaxPartSph)
{
printf("Not enough space on task=%d for SPH particles (space for %d, need at least %d)\n",
ThisTask, All.MaxPartSph, N_gas + n_for_this_task);
fflush(stdout);
endrun(172);
}
}
nall += n_for_this_task;
}
if(NumPart + nall > All.MaxPart)
{
printf("Not enough space on task=%d (space for %d, need at least %d)\n",
ThisTask, All.MaxPart, NumPart + nall);
fflush(stdout);
endrun(173);
}
memmove(&P[N_gas + nall], &P[N_gas], (NumPart - N_gas) * sizeof(struct particle_data));
nstart = N_gas;
for(bnr = 0; bnr < 1000; bnr++)
{
blocknr = (enum iofields) bnr;
if(blocknr == IO_LASTENTRY)
break;
if(blockpresent(blocknr))
{
#ifdef CR_IC
if(RestartFlag == 0 && ((blocknr > IO_CR_Q0 && blocknr != IO_BFLD)
|| (blocknr >= IO_RHO && blocknr <= IO_ACCEL)))
#else
#ifdef EOS_DEGENERATE
if(RestartFlag == 0 && (blocknr > IO_U && blocknr != IO_EOSXNUC))
#else
#ifndef CHEMISTRY
#ifndef READ_HSML
/* normal */
if(RestartFlag == 0 && blocknr > IO_U && blocknr != IO_BFLD && blocknr != IO_Z && blocknr != IO_AGE)
#else
if(RestartFlag == 0 && blocknr > IO_U && blocknr != IO_BFLD && blocknr != IO_HSML)
#endif
#else
if(RestartFlag == 0 && blocknr > IO_HM)
#endif
#endif
#endif
#if defined(DISTORTIONTENSORPS) && !defined(COSMIC_DISTORTION)
if(RestartFlag == 0 && (blocknr > IO_U && blocknr != IO_SHEET_ORIENTATION))
if(RestartFlag == 0 && (blocknr > IO_U && blocknr != IO_INIT_DENSITY))
if(RestartFlag == 0 && (blocknr > IO_U && blocknr != IO_CAUSTIC_COUNTER))
#ifdef DISTORTION_READALL
if(RestartFlag == 0 && (blocknr > IO_U && blocknr != IO_DISTORTIONTENSORPS))
#endif
#endif
continue; /* ignore all other blocks in initial conditions */
#ifdef BINISET
if(RestartFlag == 0 && blocknr == IO_BFLD)
continue;
#endif
if(ThisTask == readTask)
{
get_dataset_name(blocknr, buf);
printf("reading block %d (%s)...\n", blocknr, buf);
fflush(stdout);
}
bytes_per_blockelement = get_bytes_per_blockelement(blocknr, 1);
blockmaxlen = ((int) (All.BufferSize * 1024 * 1024)) / bytes_per_blockelement;
npart = get_particles_in_block(blocknr, &typelist[0]);
if(npart > 0)
{
if(blocknr != IO_DMHSML && blocknr != IO_DMDENSITY && blocknr != IO_DMVELDISP && blocknr != IO_DMHSML_V && blocknr != IO_DMDENSITY_V)
if(ThisTask == readTask)
{
if(All.ICFormat == 2)
{
SKIP;
my_fread(&label, sizeof(char), 4, fd);
my_fread(&nextblock, sizeof(int), 1, fd);
#ifdef AUTO_SWAP_ENDIAN_READIC
swap_Nbyte((char *) &nextblock, 1, 4);
#endif
printf("Reading header => '%c%c%c%c' (%d byte)\n", label[0], label[1], label[2],
label[3], nextblock);
SKIP2;
get_Tab_IO_Label(blocknr, expected_label);
if(strncmp(label, expected_label, 4) != 0)
{
printf("incorrect block-structure!\n");
printf("expected '%c%c%c%c' but found '%c%c%c%c'\n",
label[0], label[1], label[2], label[3],
expected_label[0], expected_label[1], expected_label[2],
expected_label[3]);
fflush(stdout);
endrun(1890);
}
}
if(All.ICFormat == 1 || All.ICFormat == 2)
SKIP;
}
for(type = 0, offset = 0, nread = 0; type < 6; type++)
{
n_in_file = header.npart[type];
#ifdef HAVE_HDF5
pcsum = 0;
#endif
if(typelist[type] == 0)
{
n_for_this_task = n_in_file / ntask;
if((ThisTask - readTask) < (n_in_file % ntask))
n_for_this_task++;
offset += n_for_this_task;
}
else
{
for(task = readTask; task <= lastTask; task++)
{
n_for_this_task = n_in_file / ntask;
if((task - readTask) < (n_in_file % ntask))
n_for_this_task++;
if(task == ThisTask)
if(NumPart + n_for_this_task > All.MaxPart)
{
printf("too many particles. %d %d %d\n", NumPart, n_for_this_task,
All.MaxPart);
endrun(1313);
}
do
{
pc = n_for_this_task;
if(pc > blockmaxlen)
pc = blockmaxlen;
if(ThisTask == readTask)
{
if(All.ICFormat == 1 || All.ICFormat == 2)
{
if(blocknr != IO_DMHSML && blocknr != IO_DMDENSITY && blocknr != IO_DMVELDISP && blocknr != IO_DMHSML_V && blocknr != IO_DMDENSITY_V)
{
my_fread(CommBuffer, bytes_per_blockelement, pc, fd);
nread += pc;
}
else
{
#ifdef SUBFIND_RESHUFFLE_CATALOGUE
read_hsml_files(CommBuffer, pc, blocknr,
NumPartPerFile[FileNr] + nread);
#endif
nread += pc;
}
}
#ifdef HAVE_HDF5
if(All.ICFormat == 3 && pc > 0)
{
get_dataset_name(blocknr, buf);
hdf5_dataset = H5Dopen(hdf5_grp[type], buf);
dims[0] = header.npart[type];
dims[1] = get_values_per_blockelement(blocknr);
if(dims[1] == 1)
rank = 1;
else
rank = 2;
hdf5_dataspace_in_file = H5Screate_simple(rank, dims, NULL);
dims[0] = pc;
hdf5_dataspace_in_memory = H5Screate_simple(rank, dims, NULL);
start[0] = pcsum;
start[1] = 0;
count[0] = pc;
count[1] = get_values_per_blockelement(blocknr);
pcsum += pc;
H5Sselect_hyperslab(hdf5_dataspace_in_file, H5S_SELECT_SET,
start, NULL, count, NULL);
switch (get_datatype_in_block(blocknr))
{
case 0:
hdf5_datatype = H5Tcopy(H5T_NATIVE_UINT);
break;
case 1:
#ifdef INPUT_IN_DOUBLEPRECISION
hdf5_datatype = H5Tcopy(H5T_NATIVE_DOUBLE);
#else
hdf5_datatype = H5Tcopy(H5T_NATIVE_FLOAT);
#endif
break;
case 2:
hdf5_datatype = H5Tcopy(H5T_NATIVE_UINT64);
break;
}
H5Dread(hdf5_dataset, hdf5_datatype, hdf5_dataspace_in_memory,
hdf5_dataspace_in_file, H5P_DEFAULT, CommBuffer);
H5Tclose(hdf5_datatype);
H5Sclose(hdf5_dataspace_in_memory);
H5Sclose(hdf5_dataspace_in_file);
H5Dclose(hdf5_dataset);
}
#endif
}
if(ThisTask == readTask && task != readTask && pc > 0)
MPI_Ssend(CommBuffer, bytes_per_blockelement * pc, MPI_BYTE, task, TAG_PDATA,
MPI_COMM_WORLD);
if(ThisTask != readTask && task == ThisTask && pc > 0)
MPI_Recv(CommBuffer, bytes_per_blockelement * pc, MPI_BYTE, readTask,
TAG_PDATA, MPI_COMM_WORLD, &status);
if(ThisTask == task)
{
empty_read_buffer(blocknr, nstart + offset, pc, type);
offset += pc;
}
n_for_this_task -= pc;
}
while(n_for_this_task > 0);
}
}
}
if(ThisTask == readTask)
{
if(blocknr != IO_DMHSML && blocknr != IO_DMDENSITY && blocknr != IO_DMVELDISP && blocknr != IO_DMHSML_V && blocknr != IO_DMDENSITY_V)
if(All.ICFormat == 1 || All.ICFormat == 2)
{
SKIP2;
#ifdef AUTO_SWAP_ENDIAN_READIC
swap_Nbyte((char *) &blksize1, 1, 4);
swap_Nbyte((char *) &blksize2, 1, 4);
#endif
if(blksize1 != blksize2)
{
printf("incorrect block-sizes detected!\n");
printf("Task=%d blocknr=%d blksize1=%d blksize2=%d\n", ThisTask, blocknr,
blksize1, blksize2);
if(blocknr == IO_ID)
{
printf
("Possible mismatch of 32bit and 64bit ID's in IC file and GADGET compilation !\n");
}
fflush(stdout);
endrun(1889);
}
}
}
}
}
}
#ifdef SAVE_HSML_IN_IC_ORDER
MyIDType IdCount = 0;
for(type = 0, offset = 0; type < 6; type++)
{
n_in_file = header.npart[type];
for(task = readTask; task <= lastTask; task++)
{
n_for_this_task = n_in_file / ntask;
if((task - readTask) < (n_in_file % ntask))
n_for_this_task++;
if(ThisTask == task)
{
int i;
for(i = 0; i < n_for_this_task; i++)
P[nstart + offset + i].ID_ic_order = NumPartPerFile[FileNr] + IdCount + i;
offset += n_for_this_task;
}
IdCount += n_for_this_task;
}
}
#endif
for(type = 0; type < 6; type++)
{
n_in_file = header.npart[type];
n_for_this_task = n_in_file / ntask;
if((ThisTask - readTask) < (n_in_file % ntask))
n_for_this_task++;
NumPart += n_for_this_task;
if(type == 0)
N_gas += n_for_this_task;
}
if(ThisTask == readTask)
{
if(All.ICFormat == 1 || All.ICFormat == 2)
fclose(fd);
#ifdef HAVE_HDF5
if(All.ICFormat == 3)
{
for(type = 5; type >= 0; type--)
if(header.npart[type] > 0)
H5Gclose(hdf5_grp[type]);
H5Fclose(hdf5_file);
}
#endif
}
#if defined(COSMIC_RAYS) && (!defined(CR_IC))
for(i = 0; i < n_for_this_task; i++)
{
if(P[i].Type != 0)
{
break;
}
for(CRpop = 0; CRpop < NUMCRPOP; CRpop++)
{
SphP[i].CR_C0[CRpop] = 0.0;
SphP[i].CR_q0[CRpop] = 1.0e10;
}
}
#endif
}
/*! This function reads a snapshot file and distributes the data it contains
* to tasks 'readTask' to 'lastTask'.
*/
void read_file(char *fname, int readTask, int lastTask)
{
int blockmaxlen;
int i, n_in_file, n_for_this_task, ntask, pc, offset = 0, task;
int blksize1, blksize2;
MPI_Status status;
FILE *fd = 0;
int nall;
int type;
char label[4];
int nstart, bytes_per_blockelement, npart, nextblock, typelist[6];
enum iofields blocknr;
#ifdef HAVE_HDF5
char buf[500];
int rank, pcsum;
hid_t hdf5_file, hdf5_grp[6], hdf5_dataspace_in_file;
hid_t hdf5_datatype, hdf5_dataspace_in_memory, hdf5_dataset;
hsize_t dims[2], count[2], start[2];
#endif
#define SKIP {my_fread(&blksize1,sizeof(int),1,fd);}
#define SKIP2 {my_fread(&blksize2,sizeof(int),1,fd);}
if(ThisTask == readTask)
{
if(All.ICFormat == 1 || All.ICFormat == 2)
{
if(!(fd = fopen(fname, "r")))
{
printf("can't open file `%s' for reading initial conditions.\n", fname);
endrun(123);
}
if(All.ICFormat == 2)
{
SKIP;
my_fread(&label, sizeof(char), 4, fd);
my_fread(&nextblock, sizeof(int), 1, fd);
printf("Reading header => '%c%c%c%c' (%d byte)\n", label[0], label[1], label[2], label[3],
nextblock);
SKIP2;
}
SKIP;
my_fread(&header, sizeof(header), 1, fd);
SKIP2;
if(blksize1 != 256 || blksize2 != 256)
{
printf("incorrect header format\n");
fflush(stdout);
endrun(890);
}
}
#ifdef HAVE_HDF5
if(All.ICFormat == 3)
{
read_header_attributes_in_hdf5(fname);
hdf5_file = H5Fopen(fname, H5F_ACC_RDONLY, H5P_DEFAULT);
for(type = 0; type < 6; type++)
{
if(header.npart[type] > 0)
{
sprintf(buf, "/PartType%d", type);
hdf5_grp[type] = H5Gopen(hdf5_file, buf);
}
}
}
#endif
for(task = readTask + 1; task <= lastTask; task++)
MPI_Ssend(&header, sizeof(header), MPI_BYTE, task, TAG_HEADER, MPI_COMM_WORLD);
}
else
MPI_Recv(&header, sizeof(header), MPI_BYTE, readTask, TAG_HEADER, MPI_COMM_WORLD, &status);
if(All.TotNumPart == 0)
{
if(header.num_files <= 1)
for(i = 0; i < 6; i++)
header.npartTotal[i] = header.npart[i];
All.TotN_gas = header.npartTotal[0] + (((long long) header.npartTotalHighWord[0]) << 32);
for(i = 0, All.TotNumPart = 0; i < 6; i++)
{
All.TotNumPart += header.npartTotal[i];
All.TotNumPart += (((long long) header.npartTotalHighWord[i]) << 32);
}
for(i = 0; i < 6; i++)
All.MassTable[i] = header.mass[i];
All.MaxPart = All.PartAllocFactor * (All.TotNumPart / NTask); /* sets the maximum number of particles that may */
All.MaxPartSph = All.PartAllocFactor * (All.TotN_gas / NTask); /* sets the maximum number of particles that may
reside on a processor */
allocate_memory();
if(RestartFlag == 2)
All.Time = All.TimeBegin = header.time;
}
if(ThisTask == readTask)
{
for(i = 0, n_in_file = 0; i < 6; i++)
n_in_file += header.npart[i];
printf("\nreading file `%s' on task=%d (contains %d particles.)\n"
"distributing this file to tasks %d-%d\n"
"Type 0 (gas): %8d (tot=%6d%09d) masstab=%g\n"
"Type 1 (halo): %8d (tot=%6d%09d) masstab=%g\n"
"Type 2 (disk): %8d (tot=%6d%09d) masstab=%g\n"
"Type 3 (bulge): %8d (tot=%6d%09d) masstab=%g\n"
"Type 4 (stars): %8d (tot=%6d%09d) masstab=%g\n"
"Type 5 (bndry): %8d (tot=%6d%09d) masstab=%g\n\n", fname, ThisTask, n_in_file, readTask,
lastTask, header.npart[0], (int) (header.npartTotal[0] / 1000000000),
(int) (header.npartTotal[0] % 1000000000), All.MassTable[0], header.npart[1],
(int) (header.npartTotal[1] / 1000000000), (int) (header.npartTotal[1] % 1000000000),
All.MassTable[1], header.npart[2], (int) (header.npartTotal[2] / 1000000000),
(int) (header.npartTotal[2] % 1000000000), All.MassTable[2], header.npart[3],
(int) (header.npartTotal[3] / 1000000000), (int) (header.npartTotal[3] % 1000000000),
All.MassTable[3], header.npart[4], (int) (header.npartTotal[4] / 1000000000),
(int) (header.npartTotal[4] % 1000000000), All.MassTable[4], header.npart[5],
(int) (header.npartTotal[5] / 1000000000), (int) (header.npartTotal[5] % 1000000000),
All.MassTable[5]);
fflush(stdout);
}
ntask = lastTask - readTask + 1;
/* to collect the gas particles all at the beginning (in case several
snapshot files are read on the current CPU) we move the collisionless
particles such that a gap of the right size is created */
for(type = 0, nall = 0; type < 6; type++)
{
n_in_file = header.npart[type];
n_for_this_task = n_in_file / ntask;
if((ThisTask - readTask) < (n_in_file % ntask))
n_for_this_task++;
nall += n_for_this_task;
}
memmove(&P[N_gas + nall], &P[N_gas], (NumPart - N_gas) * sizeof(struct particle_data));
nstart = N_gas;
for(blocknr = 0; blocknr < IO_NBLOCKS; blocknr++)
{
if(blockpresent(blocknr))
{
if(RestartFlag == 0 && blocknr > IO_U)
continue; /* ignore all other blocks in initial conditions */
bytes_per_blockelement = get_bytes_per_blockelement(blocknr);
blockmaxlen = ((int) (All.BufferSize * 1024 * 1024)) / bytes_per_blockelement;
npart = get_particles_in_block(blocknr, &typelist[0]);
if(npart > 0)
{
if(ThisTask == readTask)
{
if(All.ICFormat == 2)
{
SKIP;
my_fread(&label, sizeof(char), 4, fd);
my_fread(&nextblock, sizeof(int), 1, fd);
printf("Reading header => '%c%c%c%c' (%d byte)\n", label[0], label[1], label[2],
label[3], nextblock);
SKIP2;
if(strncmp(label, Tab_IO_Labels[blocknr], 4) != 0)
{
printf("incorrect block-structure!\n");
printf("expected '%c%c%c%c' but found '%c%c%c%c'\n",
label[0], label[1], label[2], label[3],
Tab_IO_Labels[blocknr][0], Tab_IO_Labels[blocknr][1],
Tab_IO_Labels[blocknr][2], Tab_IO_Labels[blocknr][3]);
fflush(stdout);
endrun(1890);
}
}
if(All.ICFormat == 1 || All.ICFormat == 2)
SKIP;
}
for(type = 0, offset = 0; type < 6; type++)
{
n_in_file = header.npart[type];
#ifdef HAVE_HDF5
pcsum = 0;
#endif
if(typelist[type] == 0)
{
n_for_this_task = n_in_file / ntask;
if((ThisTask - readTask) < (n_in_file % ntask))
n_for_this_task++;
offset += n_for_this_task;
}
else
{
for(task = readTask; task <= lastTask; task++)
{
n_for_this_task = n_in_file / ntask;
if((task - readTask) < (n_in_file % ntask))
n_for_this_task++;
if(task == ThisTask)
if(NumPart + n_for_this_task > All.MaxPart)
{
printf("too many particles\n");
endrun(1313);
}
do
{
pc = n_for_this_task;
if(pc > blockmaxlen)
pc = blockmaxlen;
if(ThisTask == readTask)
{
if(All.ICFormat == 1 || All.ICFormat == 2)
my_fread(CommBuffer, bytes_per_blockelement, pc, fd);
#ifdef HAVE_HDF5
if(All.ICFormat == 3)
{
get_dataset_name(blocknr, buf);
hdf5_dataset = H5Dopen(hdf5_grp[type], buf);
dims[0] = header.npart[type];
dims[1] = get_values_per_blockelement(blocknr);
if(dims[1] == 1)
rank = 1;
else
rank = 2;
hdf5_dataspace_in_file = H5Screate_simple(rank, dims, NULL);
dims[0] = pc;
hdf5_dataspace_in_memory = H5Screate_simple(rank, dims, NULL);
start[0] = pcsum;
start[1] = 0;
count[0] = pc;
count[1] = get_values_per_blockelement(blocknr);
pcsum += pc;
H5Sselect_hyperslab(hdf5_dataspace_in_file, H5S_SELECT_SET,
start, NULL, count, NULL);
switch (get_datatype_in_block(blocknr))
{
case 0:
hdf5_datatype = H5Tcopy(H5T_NATIVE_UINT);
break;
case 1:
hdf5_datatype = H5Tcopy(H5T_NATIVE_FLOAT);
break;
case 2:
hdf5_datatype = H5Tcopy(H5T_NATIVE_UINT64);
break;
}
H5Dread(hdf5_dataset, hdf5_datatype, hdf5_dataspace_in_memory,
hdf5_dataspace_in_file, H5P_DEFAULT, CommBuffer);
H5Tclose(hdf5_datatype);
H5Sclose(hdf5_dataspace_in_memory);
H5Sclose(hdf5_dataspace_in_file);
H5Dclose(hdf5_dataset);
}
#endif
}
if(ThisTask == readTask && task != readTask)
MPI_Ssend(CommBuffer, bytes_per_blockelement * pc, MPI_BYTE, task, TAG_PDATA,
MPI_COMM_WORLD);
if(ThisTask != readTask && task == ThisTask)
MPI_Recv(CommBuffer, bytes_per_blockelement * pc, MPI_BYTE, readTask,
TAG_PDATA, MPI_COMM_WORLD, &status);
if(ThisTask == task)
{
empty_read_buffer(blocknr, nstart + offset, pc, type);
offset += pc;
}
n_for_this_task -= pc;
}
while(n_for_this_task > 0);
}
}
}
if(ThisTask == readTask)
{
if(All.ICFormat == 1 || All.ICFormat == 2)
{
SKIP2;
if(blksize1 != blksize2)
{
printf("incorrect block-sizes detected!\n");
printf("Task=%d blocknr=%d blksize1=%d blksize2=%d\n", ThisTask, blocknr,
blksize1, blksize2);
fflush(stdout);
endrun(1889);
}
}
}
}
}
}
for(type = 0; type < 6; type++)
{
n_in_file = header.npart[type];
n_for_this_task = n_in_file / ntask;
if((ThisTask - readTask) < (n_in_file % ntask))
n_for_this_task++;
NumPart += n_for_this_task;
if(type == 0)
N_gas += n_for_this_task;
}
if(ThisTask == readTask)
{
if(All.ICFormat == 1 || All.ICFormat == 2)
fclose(fd);
#ifdef HAVE_HDF5
if(All.ICFormat == 3)
{
for(type = 5; type >= 0; type--)
if(header.npart[type] > 0)
H5Gclose(hdf5_grp[type]);
H5Fclose(hdf5_file);
}
#endif
}
}
void get_particle_numbers(char *fname, int num_files)
{
char buf[1000];
int blksize1, blksize2;
char label[4];
int nextblock;
int i, j;
printf("num_files=%d\n", num_files);
for(i = 0; i < num_files; i++)
{
if(num_files > 1)
{
sprintf(buf, "%s.%d", fname, i);
if(All.ICFormat == 3)
sprintf(buf, "%s.%d.hdf5", fname, i);
}
else
{
sprintf(buf, "%s", fname);
if(All.ICFormat == 3)
sprintf(buf, "%s.hdf5", fname);
}
#define SKIP {my_fread(&blksize1,sizeof(int),1,fd);}
#define SKIP2 {my_fread(&blksize2,sizeof(int),1,fd);}
if(All.ICFormat == 1 || All.ICFormat == 2)
{
FILE *fd;
if(!(fd = fopen(buf, "r")))
{
printf("can't open file `%s' for reading initial conditions.\n", buf);
endrun(1239);
}
if(All.ICFormat == 2)
{
SKIP;
#ifdef AUTO_SWAP_ENDIAN_READIC
swap_file = blksize1;
#endif
my_fread(&label, sizeof(char), 4, fd);
my_fread(&nextblock, sizeof(int), 1, fd);
#ifdef AUTO_SWAP_ENDIAN_READIC
swap_Nbyte((char *) &nextblock, 1, 4);
#endif
SKIP2;
}
SKIP;
#ifdef AUTO_SWAP_ENDIAN_READIC
if(All.ICFormat == 1)
{
if(blksize1 != 256)
swap_file = 1;
}
#endif
my_fread(&header, sizeof(header), 1, fd);
SKIP2;
#ifdef AUTO_SWAP_ENDIAN_READIC
swap_Nbyte((char *) &blksize1, 1, 4);
swap_Nbyte((char *) &blksize2, 1, 4);
#endif
if(blksize1 != 256 || blksize2 != 256)
{
printf("incorrect header format\n");
fflush(stdout);
endrun(890);
}
#ifdef AUTO_SWAP_ENDIAN_READIC
swap_header();
#endif
fclose(fd);
}
#ifdef HAVE_HDF5
if(All.ICFormat == 3)
{
read_header_attributes_in_hdf5(buf);
}
#endif
NumPartPerFile[i] = 0;
for(j = 0; j < 6; j++)
{
#if defined(SUBFIND_RESHUFFLE_CATALOGUE)
if(((1 << j) & (FOF_PRIMARY_LINK_TYPES)))
#endif
NumPartPerFile[i] += header.npart[j];
}
printf("File=%4d: NumPart= %d\n", i, (int) (NumPartPerFile[i]));
}
long long n, sum;
for(i = 0, sum = 0; i < num_files; i++)
{
n = NumPartPerFile[i];
NumPartPerFile[i] = sum;
sum += n;
}
}