// Returns a newly-allocated array containing the raw header bytes for the
// given extension.
char* anqfits_header_get_data(const anqfits_t* qf, int ext, int* Nbytes) {
FILE* fid;
off_t N, nr;
char* data;
off_t start;
start = anqfits_header_start(qf, ext);
if (start == -1)
return NULL;
N = anqfits_header_size(qf, ext);
if (N == -1)
return NULL;
fid = fopen(qf->filename, "rb");
if (!fid) {
return NULL;
}
data = malloc(N + 1);
if (start) {
if (fseeko(fid, start, SEEK_SET)) {
SYSERROR("Failed to seek to start of FITS header: byte %li in %s",
(long int)start, qf->filename);
return NULL;
}
}
nr = fread(data, 1, N, fid);
fclose(fid);
if (nr != N) {
free(data);
return NULL;
}
data[N] = '\0';
if (Nbytes)
*Nbytes = N;
return data;
}
int anqfits_get_header_start_and_size(const anqfits_t* qf, int ext,
off_t* pstart, off_t* psize) {
if (pstart) {
*pstart = anqfits_header_start(qf, ext);
if (*pstart == -1)
return -1;
}
if (psize) {
*psize = anqfits_header_size(qf, ext);
if (*psize == -1)
return -1;
}
return 0;
}
const qfits_header* anqfits_get_header_const(const anqfits_t* qf, int ext) {
assert(ext >= 0 && ext < qf->Nexts);
if (!qf->exts[ext].header) {
off_t start, size;
char* str;
start = anqfits_header_start(qf, ext);
size = anqfits_header_size (qf, ext);
if ((start == -1) || (size == -1)) {
ERROR("failed to get header start + size for file \"%s\" extension %i", qf->filename, ext);
return NULL;
}
str = file_get_contents_offset(qf->filename, (int)start, (int)size);
if (!str) {
ERROR("failed to read \"%s\" extension %i: offset %i size %i\n", qf->filename, ext, (int)start, (int)size);
return NULL;
}
qf->exts[ext].header = qfits_header_read_hdr_string
((unsigned char*)str, (int)size);
}
return qf->exts[ext].header;
}
int main(int argc, char *argv[]) {
int argchar;
char* infn = NULL;
char* outfn = NULL;
FILE* fin = NULL;
FILE* fout = NULL;
pl* cols;
char* progname = argv[0];
int nextens;
int ext;
int NC;
int start, size;
anqfits_t* anq = NULL;
qfits_table* outtable;
unsigned char* buffer;
cols = pl_new(16);
while ((argchar = getopt (argc, argv, OPTIONS)) != -1)
switch (argchar) {
case 'c':
pl_append(cols, optarg);
break;
case 'i':
infn = optarg;
break;
case 'o':
outfn = optarg;
break;
case '?':
case 'h':
printHelp(progname);
return 0;
default:
return -1;
}
if (!infn || !outfn || !pl_size(cols)) {
printHelp(progname);
exit(-1);
}
fin = fopen(infn, "rb");
if (!fin) {
ERROR("Failed to open input file %s: %s\n", infn, strerror(errno));
exit(-1);
}
fout = fopen(outfn, "wb");
if (!fout) {
ERROR("Failed to open output file %s: %s\n", outfn, strerror(errno));
exit(-1);
}
// copy the main header exactly.
anq = anqfits_open(infn);
if (!anq) {
ERROR("Failed to read \"%s\"", infn);
exit(-1);
}
start = anqfits_header_start(anq, 0);
size = anqfits_header_size (anq, 0);
if (pipe_file_offset(fin, start, size, fout)) {
ERROR("Failed to copy primary header.\n");
exit(-1);
}
NC = pl_size(cols);
nextens = anqfits_n_ext(anq);
printf("Translating %i extensions.\n", nextens);
buffer = NULL;
for (ext=1; ext<nextens; ext++) {
int c2, c;
int columns[NC];
int sizes[NC];
int offsets[NC];
int offset = 0;
int off, n;
int totalsize = 0;
const int BLOCK=1000;
qfits_table* table;
qfits_header* header;
qfits_header* tablehdr;
if (ext%100 == 0) {
printf("Extension %i.\n", ext);
fflush(stdout);
}
if (!anqfits_is_table(anq, ext)) {
ERROR("extention %i isn't a table.\n", ext);
// HACK - just copy it.
return -1;
}
table = anqfits_get_table(anq, ext);
if (!table) {
ERROR("failed to open table: file %s, extension %i.\n", infn, ext);
return -1;
}
header = anqfits_get_header(anq, ext);
if (!header) {
ERROR("failed to read header: extension %i\n", ext);
exit(-1);
}
outtable = qfits_table_new(outfn, QFITS_BINTABLE, 0, NC, table->nr);
outtable->tab_w = 0;
for (c=0; c<pl_size(cols); c++) {
columns[c] = -1;
}
for (c=0; c<pl_size(cols); c++) {
char* colname = pl_get(cols, c);
qfits_col* col;
c2 = fits_find_column(table, colname);
if (c2 == -1) {
ERROR("Extension %i: failed to find column named %s\n",
ext, colname);
exit(-1);
}
col = table->col + c2;
columns[c] = c2;
sizes[c] = col->atom_nb * col->atom_size;
offsets[c] = offset;
offset += sizes[c];
qfits_col_fill(outtable->col + c,
col->atom_nb, col->atom_dec_nb,
col->atom_size, col->atom_type,
col->tlabel, col->tunit,
col->nullval, col->tdisp,
col->zero_present,
col->zero,
col->scale_present,
col->scale,
outtable->tab_w);
outtable->tab_w += sizes[c];
}
totalsize = offset;
tablehdr = qfits_table_ext_header_default(outtable);
// add any headers from the original table that aren't part of the BINTABLE extension.
fits_copy_non_table_headers(tablehdr, header);
qfits_header_dump(tablehdr, fout);
qfits_header_destroy(tablehdr);
buffer = realloc(buffer, totalsize * BLOCK);
for (off=0; off<table->nr; off+=n) {
if (off + BLOCK > table->nr)
n = table->nr - off;
else
n = BLOCK;
for (c=0; c<pl_size(cols); c++)
qfits_query_column_seq_to_array_no_endian_swap
(table, columns[c], off, n, buffer + offsets[c], totalsize);
if (fwrite(buffer, totalsize, n, fout) != n) {
ERROR("Error writing a block of data: ext %i: %s\n", ext, strerror(errno));
exit(-1);
}
}
qfits_table_close(outtable);
fits_pad_file(fout);
qfits_header_destroy(header);
qfits_table_close(table);
}
free(buffer);
if (fclose(fout)) {
ERROR("Error closing output file: %s\n", strerror(errno));
}
fclose(fin);
anqfits_close(anq);
pl_free(cols);
return 0;
}
int resort_xylist(const char* infn, const char* outfn,
const char* fluxcol, const char* backcol,
anbool ascending) {
FILE* fin = NULL;
FILE* fout = NULL;
double *flux = NULL, *back = NULL;
int *perm1 = NULL, *perm2 = NULL;
anbool *used = NULL;
int start, size, nextens, ext;
int (*compare)(const void*, const void*);
fitstable_t* tab = NULL;
anqfits_t* anq = NULL;
if (ascending)
compare = compare_doubles_asc;
else
compare = compare_doubles_desc;
if (!fluxcol)
fluxcol = "FLUX";
if (!backcol)
backcol = "BACKGROUND";
fin = fopen(infn, "rb");
if (!fin) {
SYSERROR("Failed to open input file %s", infn);
return -1;
}
fout = fopen(outfn, "wb");
if (!fout) {
SYSERROR("Failed to open output file %s", outfn);
goto bailout;
}
// copy the main header exactly.
anq = anqfits_open(infn);
if (!anq) {
ERROR("Failed to open file \"%s\"", infn);
goto bailout;
}
start = anqfits_header_start(anq, 0);
size = anqfits_header_size (anq, 0);
if (pipe_file_offset(fin, start, size, fout)) {
ERROR("Failed to copy primary FITS header.");
goto bailout;
}
nextens = anqfits_n_ext(anq);
tab = fitstable_open(infn);
if (!tab) {
ERROR("Failed to open FITS table in file %s", infn);
goto bailout;
}
for (ext=1; ext<nextens; ext++) {
int hdrstart, hdrsize, datstart;
int i, N;
int rowsize;
hdrstart = anqfits_header_start(anq, ext);
hdrsize = anqfits_header_size (anq, ext);
datstart = anqfits_data_start (anq, ext);
if (!anqfits_is_table(anq, ext)) {
ERROR("Extention %i isn't a table. Skipping", ext);
continue;
}
// Copy the header as-is.
if (pipe_file_offset(fin, hdrstart, hdrsize, fout)) {
ERROR("Failed to copy the header of extension %i", ext);
goto bailout;
}
if (fitstable_read_extension(tab, ext)) {
ERROR("Failed to read FITS table from extension %i", ext);
goto bailout;
}
rowsize = fitstable_row_size(tab);
// read FLUX column as doubles.
flux = fitstable_read_column(tab, fluxcol, TFITS_BIN_TYPE_D);
if (!flux) {
ERROR("Failed to read FLUX column from extension %i", ext);
goto bailout;
}
// BACKGROUND
back = fitstable_read_column(tab, backcol, TFITS_BIN_TYPE_D);
if (!back) {
ERROR("Failed to read BACKGROUND column from extension %i", ext);
goto bailout;
}
debug("First 10 rows of input table:\n");
for (i=0; i<10; i++)
debug("flux %g, background %g\n", flux[i], back[i]);
N = fitstable_nrows(tab);
// set back = flux + back (ie, non-background-subtracted flux)
for (i=0; i<N; i++)
back[i] += flux[i];
// Sort by flux...
perm1 = permuted_sort(flux, sizeof(double), compare, NULL, N);
// Sort by non-background-subtracted flux...
perm2 = permuted_sort(back, sizeof(double), compare, NULL, N);
used = malloc(N * sizeof(anbool));
memset(used, 0, N * sizeof(anbool));
// Check sort...
for (i=0; i<N-1; i++) {
if (ascending) {
assert(flux[perm1[i]] <= flux[perm1[i+1]]);
assert(back[perm2[i]] <= back[perm2[i+1]]);
} else {
assert(flux[perm1[i]] >= flux[perm1[i+1]]);
assert(back[perm2[i]] >= back[perm2[i+1]]);
}
}
for (i=0; i<N; i++) {
int j;
int inds[] = { perm1[i], perm2[i] };
for (j=0; j<2; j++) {
int index = inds[j];
assert(index < N);
if (used[index])
continue;
used[index] = TRUE;
debug("adding index %i: %s %g\n", index, j==0 ? "flux" : "bgsub", j==0 ? flux[index] : back[index]);
if (pipe_file_offset(fin, datstart + index * rowsize, rowsize, fout)) {
ERROR("Failed to copy row %i", index);
goto bailout;
}
}
}
for (i=0; i<N; i++)
assert(used[i]);
if (fits_pad_file(fout)) {
ERROR("Failed to add padding to extension %i", ext);
goto bailout;
}
free(flux);
flux = NULL;
free(back);
back = NULL;
free(perm1);
perm1 = NULL;
free(perm2);
perm2 = NULL;
free(used);
used = NULL;
}
fitstable_close(tab);
tab = NULL;
if (fclose(fout)) {
SYSERROR("Failed to close output file %s", outfn);
return -1;
}
fclose(fin);
return 0;
bailout:
if (tab)
fitstable_close(tab);
if (fout)
fclose(fout);
if (fin)
fclose(fin);
free(flux);
free(back);
free(perm1);
free(perm2);
free(used);
return -1;
}
int tabsort(const char* infn, const char* outfn, const char* colname,
int descending) {
FILE* fin;
FILE* fout;
int ext, nextens;
off_t start, size;
void* data = NULL;
int* perm = NULL;
unsigned char* map = NULL;
size_t mapsize = 0;
anqfits_t* anq = NULL;
fin = fopen(infn, "rb");
if (!fin) {
SYSERROR("Failed to open input file %s", infn);
return -1;
}
fout = fopen(outfn, "wb");
if (!fout) {
SYSERROR("Failed to open output file %s", outfn);
goto bailout;
}
// copy the main header exactly.
anq = anqfits_open(infn);
if (!anq) {
ERROR("Failed to open \"%s\"", infn);
goto bailout;
}
start = anqfits_header_start(anq, 0);
size = anqfits_header_size (anq, 0);
if (pipe_file_offset(fin, start, size, fout)) {
ERROR("Failed to copy primary FITS header.");
goto bailout;
}
nextens = anqfits_n_ext(anq);
//logverb("Sorting %i extensions.\n", nextens);
for (ext=1; ext<nextens; ext++) {
int c;
qfits_table* table;
qfits_col* col;
int mgap;
off_t mstart;
size_t msize;
int atomsize;
int (*sort_func)(const void*, const void*);
unsigned char* tabledata;
unsigned char* tablehdr;
off_t hdrstart, hdrsize, datsize, datstart;
int i;
hdrstart = anqfits_header_start(anq, ext);
hdrsize = anqfits_header_size (anq, ext);
datstart = anqfits_data_start (anq, ext);
datsize = anqfits_data_size (anq, ext);
if (!anqfits_is_table(anq, ext)) {
ERROR("Extension %i isn't a table. Skipping.\n", ext);
continue;
}
table = anqfits_get_table(anq, ext);
if (!table) {
ERROR("Failed to open table: file %s, extension %i. Skipping.", infn, ext);
continue;
}
c = fits_find_column(table, colname);
if (c == -1) {
ERROR("Couldn't find column named \"%s\" in extension %i. Skipping.", colname, ext);
continue;
}
col = table->col + c;
switch (col->atom_type) {
case TFITS_BIN_TYPE_D:
data = realloc(data, table->nr * sizeof(double));
if (descending)
sort_func = compare_doubles_desc;
else
sort_func = compare_doubles_asc;
break;
case TFITS_BIN_TYPE_E:
data = realloc(data, table->nr * sizeof(float));
if (descending)
sort_func = compare_floats_desc;
else
sort_func = compare_floats_asc;
break;
case TFITS_BIN_TYPE_K:
data = realloc(data, table->nr * sizeof(int64_t));
if (descending)
sort_func = compare_int64_desc;
else
sort_func = compare_int64_asc;
break;
default:
ERROR("Column %s is neither FITS type D, E, nor K. Skipping.", colname);
continue;
}
// Grab the sort column.
atomsize = fits_get_atom_size(col->atom_type);
printf("Reading sort column \"%s\"\n", colname);
qfits_query_column_seq_to_array(table, c, 0, table->nr, data, atomsize);
// Sort it.
printf("Sorting sort column\n");
perm = permuted_sort(data, atomsize, sort_func, NULL, table->nr);
// mmap the input file.
printf("mmapping input file\n");
start = hdrstart;
size = hdrsize + datsize;
get_mmap_size(start, size, &mstart, &msize, &mgap);
mapsize = msize;
map = mmap(NULL, mapsize, PROT_READ, MAP_SHARED, fileno(fin), mstart);
if (map == MAP_FAILED) {
SYSERROR("Failed to mmap input file %s", infn);
map = NULL;
goto bailout;
}
tabledata = map + (off_t)mgap + (datstart - hdrstart);
tablehdr = map + (off_t)mgap;
// Copy the table header without change.
printf("Copying table header.\n");
if (fwrite(tablehdr, 1, hdrsize, fout) != hdrsize) {
SYSERROR("Failed to write FITS table header");
goto bailout;
}
for (i=0; i<table->nr; i++) {
unsigned char* rowptr;
if (i % 100000 == 0)
printf("Writing row %i\n", i);
rowptr = tabledata + (off_t)(perm[i]) * (off_t)table->tab_w;
if (fwrite(rowptr, 1, table->tab_w, fout) != table->tab_w) {
SYSERROR("Failed to write FITS table row");
goto bailout;
}
}
munmap(map, mapsize);
map = NULL;
free(perm);
perm = NULL;
if (fits_pad_file(fout)) {
ERROR("Failed to add padding to extension %i", ext);
goto bailout;
}
qfits_table_close(table);
}
free(data);
if (fclose(fout)) {
SYSERROR("Error closing output file");
fout = NULL;
goto bailout;
}
fclose(fin);
anqfits_close(anq);
printf("Done\n");
return 0;
bailout:
free(data);
free(perm);
if (fout)
fclose(fout);
fclose(fin);
if (map)
munmap(map, mapsize);
return -1;
}
int main(int argc, char *argv[]) {
int argchar;
char* infn = NULL;
char* outfn = NULL;
anbool tostdout = FALSE;
FILE* fin = NULL;
FILE* fout = NULL;
il* exts;
int i;
char* progname = argv[0];
anbool inblocks = FALSE;
anbool inmegs = FALSE;
int allexts = 0;
int Next = -1;
anbool dataonly = FALSE;
anbool headeronly = FALSE;
anqfits_t* anq = NULL;
int loglvl = LOG_MSG;
exts = il_new(16);
while ((argchar = getopt (argc, argv, OPTIONS)) != -1)
switch (argchar) {
case 'v':
loglvl++;
break;
case 'D':
dataonly = TRUE;
break;
case 'H':
headeronly = TRUE;
break;
case 'a':
allexts = 1;
break;
case 'b':
inblocks = TRUE;
break;
case 'M':
inmegs = TRUE;
break;
case 'e':
il_append(exts, atoi(optarg));
break;
case 'i':
infn = optarg;
break;
case 'o':
outfn = optarg;
break;
case '?':
case 'h':
printHelp(progname);
return 0;
default:
return -1;
}
if (headeronly && dataonly) {
fprintf(stderr, "Can't write data blocks only AND header blocks only!\n");
exit(-1);
}
if (inblocks && inmegs) {
fprintf(stderr, "Can't write sizes in FITS blocks and megabytes.\n");
exit(-1);
}
fits_use_error_system();
log_init(loglvl);
log_to(stderr);
errors_log_to(stderr);
if (infn) {
anq = anqfits_open(infn);
if (!anq) {
ERROR("Failed to open input file \"%s\"", infn);
exit(-1);
}
Next = anqfits_n_ext(anq);
fprintf(stderr, "File %s contains %i FITS extensions.\n", infn, Next);
}
if (infn && !outfn) {
for (i=0; i<Next; i++) {
off_t hdrstart, hdrlen, datastart, datalen;
hdrstart = anqfits_header_start(anq, i);
hdrlen = anqfits_header_size(anq, i);
datastart = anqfits_data_start(anq, i);
datalen = anqfits_data_size(anq, i);
if (inblocks) {
off_t block = (off_t)FITS_BLOCK_SIZE;
fprintf(stderr, "Extension %i : header start %zu , length %zu ; data start %zu , length %zu blocks.\n",
i, (size_t)(hdrstart / block), (size_t)(hdrlen / block), (size_t)(datastart / block), (size_t)(datalen / block));
} else if (inmegs) {
off_t meg = 1024*1024;
fprintf(stderr, "Extension %i : header start %zu , length %zu ; data start %zu , length %zu megabytes.\n",
i, (size_t)(hdrstart/meg), (size_t)(hdrlen/meg), (size_t)(datastart/meg), (size_t)(datalen/meg));
} else {
fprintf(stderr, "Extension %i : header start %zu , length %zu ; data start %zu , length %zu .\n",
i, (size_t)hdrstart, (size_t)hdrlen, (size_t)datastart, (size_t)datalen);
}
}
anqfits_close(anq);
exit(0);
}
if (!infn || !outfn || !(il_size(exts) || allexts)) {
printHelp(progname);
exit(-1);
}
if (!strcmp(outfn, "-")) {
tostdout = TRUE;
if (allexts) {
fprintf(stderr, "Specify all extensions (-a) and outputting to stdout (-o -) doesn't make much sense...\n");
exit(-1);
}
}
if (infn) {
fin = fopen(infn, "rb");
if (!fin) {
fprintf(stderr, "Failed to open input file %s: %s\n", infn, strerror(errno));
exit(-1);
}
}
if (tostdout)
fout = stdout;
else {
if (allexts)
for (i=0; i<Next; i++)
il_append(exts, i);
else {
// open the (single) output file.
fout = fopen(outfn, "wb");
if (!fout) {
fprintf(stderr, "Failed to open output file %s: %s\n", outfn, strerror(errno));
exit(-1);
}
}
}
for (i=0; i<il_size(exts); i++) {
off_t hdrstart, hdrlen, datastart, datalen;
int ext = il_get(exts, i);
if (allexts) {
char fn[256];
snprintf(fn, sizeof(fn), outfn, ext);
fout = fopen(fn, "wb");
if (!fout) {
fprintf(stderr, "Failed to open output file %s: %s\n", fn, strerror(errno));
exit(-1);
}
}
hdrstart = anqfits_header_start(anq, ext);
hdrlen = anqfits_header_size(anq, ext);
datastart = anqfits_data_start(anq, ext);
datalen = anqfits_data_size(anq, ext);
if (inblocks) {
off_t block = (off_t)FITS_BLOCK_SIZE;
fprintf(stderr, "Writing extension %i : header start %zu , length %zu ; data start %zu , length %zu blocks.\n",
ext, (size_t)(hdrstart / block), (size_t)(hdrlen / block), (size_t)(datastart / block), (size_t)(datalen / block));
} else if (inmegs) {
off_t meg = 1024*1024;
fprintf(stderr, "Writing extension %i : header start %zu , length %zu ; data start %zu , length %zu megabytes.\n",
ext, (size_t)(hdrstart/meg), (size_t)(hdrlen/meg), (size_t)(datastart/meg), (size_t)(datalen/meg));
} else {
fprintf(stderr, "Writing extension %i : header start %zu , length %zu ; data start %zu , length %zu .\n",
ext, (size_t)hdrstart, (size_t)hdrlen, (size_t)datastart, (size_t)datalen);
}
if (hdrlen && !dataonly) {
if (pipe_file_offset(fin, hdrstart, hdrlen, fout)) {
fprintf(stderr, "Failed to write header for extension %i: %s\n", ext, strerror(errno));
exit(-1);
}
}
if (datalen && !headeronly) {
if (pipe_file_offset(fin, datastart, datalen, fout)) {
fprintf(stderr, "Failed to write data for extension %i: %s\n", ext, strerror(errno));
exit(-1);
}
}
if (allexts)
if (fclose(fout)) {
fprintf(stderr, "Failed to close output file: %s\n", strerror(errno));
exit(-1);
}
}
fclose(fin);
if (!allexts && !tostdout)
fclose(fout);
il_free(exts);
anqfits_close(anq);
return 0;
}
int main(int argc, char *argv[]) {
int argchar;
char* infn = NULL;
char* outfn = NULL;
anbool tostdout = FALSE;
FILE* fin = NULL;
FILE* fout = NULL;
il* exts;
il* sizes;
int i;
char* progname = argv[0];
int Next;
anqfits_t* anq;
exts = il_new(16);
sizes = il_new(16);
while ((argchar = getopt (argc, argv, OPTIONS)) != -1)
switch (argchar) {
case 'e':
il_append(exts, atoi(optarg));
break;
case 's':
il_append(sizes, atoi(optarg));
break;
case 'i':
infn = optarg;
break;
case 'o':
outfn = optarg;
break;
case '?':
case 'h':
printHelp(progname);
return 0;
default:
return -1;
}
log_init(LOG_MSG);
if (!infn || !outfn || !il_size(exts) || (il_size(exts) != il_size(sizes))) {
printHelp(progname);
exit(-1);
}
if (infn) {
fin = fopen(infn, "rb");
if (!fin) {
SYSERROR("Failed to open input file %s", infn);
exit(-1);
}
}
anq = anqfits_open(infn);
if (!anq) {
ERROR("Failed to open input file %s", infn);
exit(-1);
}
Next = anqfits_n_ext(anq);
if (Next == -1) {
ERROR("Couldn't determine how many extensions are in file %s", infn);
exit(-1);
} else {
logverb("File %s contains %i FITS extensions.\n", infn, Next);
}
for (i=0; i<il_size(exts); i++) {
int e = il_get(exts, i);
int s = il_get(sizes, i);
if (e < 0 || e >= Next) {
logerr("Extension %i is not valid: must be in [%i, %i]\n", e, 0, Next);
exit(-1);
}
if (s != 2 && s != 4 && s != 8) {
logerr("Invalid byte size %i: must be 2, 4, or 8.\n", s);
exit(-1);
}
}
if (!strcmp(outfn, "-"))
tostdout = TRUE;
if (tostdout)
fout = stdout;
else {
fout = fopen(outfn, "wb");
if (!fout) {
SYSERROR("Failed to open output file %s", outfn);
exit(-1);
}
}
for (i=0; i<Next; i++) {
int hdrstart, hdrlen, datastart, datalen;
int ind;
int size;
ind = il_index_of(exts, i);
if (ind == -1) {
size = 0;
} else {
size = il_get(sizes, ind);
}
hdrstart = anqfits_header_start(anq, i);
hdrlen = anqfits_header_size (anq, i);
datastart = anqfits_data_start(anq, i);
datalen = anqfits_data_size (anq, i);
if (hdrlen) {
if (pipe_file_offset(fin, hdrstart, hdrlen, fout)) {
ERROR("Failed to write header for extension %i", i);
exit(-1);
}
}
if (!datalen)
continue;
if (size) {
int Nitems = datalen / size;
int j;
char buf[size];
logmsg("Extension %i: flipping words of length %i bytes.\n", i, size);
for (j=0; j<Nitems; j++) {
if (fread(buf, size, 1, fin) != 1) {
SYSERROR("Failed to read data element %i from extension %i", j, i);
exit(-1);
}
endian_swap(buf, size);
if (fwrite(buf, size, 1, fout) != 1) {
SYSERROR("Failed to write data element %i to extension %i", j, i);
exit(-1);
}
}
} else {
logmsg("Extension %i: copying verbatim.\n", i);
// passthrough
if (pipe_file_offset(fin, datastart, datalen, fout)) {
ERROR("Failed to write data for extension %i", i);
exit(-1);
}
}
}
fclose(fin);
anqfits_close(anq);
if (!tostdout)
fclose(fout);
il_free(exts);
il_free(sizes);
return 0;
}