nitf_Record *doRead(const char *inFile)
{
/* This is the error we hopefully wont receive */
nitf_Error e;
/* This is the reader */
nitf_Reader *reader;
/* This is the record of the file we are reading */
nitf_Record *record;
/* This is the io handle we will give the reader to parse */
nitf_IOHandle io;
int count = 0;
int numImages;
int numTexts;
int numDataExtensions;
nitf_ListIterator iter;
nitf_ListIterator end;
nitf_ImageSegment *imageSegment = NULL;
nitf_ImageReader *deserializer = NULL;
nitf_TextSegment *textSegment = NULL;
nitf_DESegment *deSegment = NULL;
nitf_SegmentReader *segmentReader = NULL;
nitf_SegmentReader *deReader = NULL;
reader = nitf_Reader_construct(&e);
if (!reader)
{
nitf_Error_print(&e, stderr, "nitf::Reader::construct() failed");
exit(EXIT_FAILURE);
}
/* If you did, though, we'll be nice and open it for you */
io = nitf_IOHandle_create(inFile,
NITF_ACCESS_READONLY,
NITF_OPEN_EXISTING, &e);
/* But, oh boy, if you gave us a bad location...! */
if (NITF_INVALID_HANDLE(io))
{
/* You had this coming! */
nitf_Error_print(&e, stderr, "nitf::IOHandle::create() failed");
exit(EXIT_FAILURE);
}
/* Read the file */
record = nitf_Reader_read(reader, io, &e);
if (!record)
{
nitf_Error_print(&e, stderr, "nitf::Reader::read() failed");
exit(EXIT_FAILURE);
}
if (!nitf_Field_get
(record->header->numImages, &numImages, NITF_CONV_INT,
NITF_INT32_SZ, &e))
{
nitf_Error_print(&e, stderr, "nitf::Field::get() failed");
numImages = 0;
}
if (!nitf_Field_get
(record->header->numTexts, &numTexts, NITF_CONV_INT,
NITF_INT32_SZ, &e))
{
nitf_Error_print(&e, stderr, "nitf::Field::get() failed");
numTexts = 0;
}
if (!nitf_Field_get
(record->header->numDataExtensions, &numDataExtensions, NITF_CONV_INT,
NITF_INT32_SZ, &e))
{
nitf_Error_print(&e, stderr, "nitf::Field::get() failed");
numDataExtensions = 0;
}
if (record->images)
{
end = nitf_List_end(record->images);
for (count = 0; count < numImages; ++count)
{
iter = nitf_List_at(record->images, count);
if (nitf_ListIterator_equals(&iter, &end))
{
printf("Out of bounds on iterator [%d]!\n", count);
exit(EXIT_FAILURE);
}
imageSegment = (nitf_ImageSegment *) nitf_ListIterator_get(&iter);
deserializer = nitf_Reader_newImageReader(reader, count, &e);
if (!deserializer)
{
nitf_Error_print(&e, stderr, "Couldnt spawn deserializer");
exit(EXIT_FAILURE);
}
printf("Writing image %d... ", count);
/* Write the thing out */
manuallyWriteImageBands(imageSegment, inFile, deserializer, count,
&e);
nitf_ImageReader_destruct(&deserializer);
printf("done.\n");
/* Increment the iterator so we can continue */
nitf_ListIterator_increment(&iter);
}
}
/* loop over texts and read the data to a file */
if (record->texts)
{
end = nitf_List_end(record->texts);
for (count = 0; count < numTexts; ++count)
{
iter = nitf_List_at(record->texts, count);
if (nitf_ListIterator_equals(&iter, &end))
{
printf("Out of bounds on iterator [%d]!\n", count);
exit(EXIT_FAILURE);
}
textSegment = (nitf_TextSegment *) nitf_ListIterator_get(&iter);
segmentReader = nitf_Reader_newTextReader(reader, count, &e);
if (!segmentReader)
{
nitf_Error_print(&e, stderr, "Couldnt spawn deserializer");
exit(EXIT_FAILURE);
}
printf("Writing text %d... ", count);
/* Write the thing out */
writeTextData(textSegment, inFile, segmentReader, count, &e);
nitf_SegmentReader_destruct(&segmentReader);
/* Increment the iterator so we can continue */
nitf_ListIterator_increment(&iter);
}
}
/*XXX*/
/* loop over data extensions and read the data to a file */
if (record->dataExtensions)
{
fprintf(stderr, "XXX Data Ext %d\n", numDataExtensions);
end = nitf_List_end(record->dataExtensions);
for (count = 0; count < numDataExtensions; ++count)
{
iter = nitf_List_at(record->dataExtensions, count);
if (nitf_ListIterator_equals(&iter, &end))
{
printf("Out of bounds on iterator [%d]!\n", count);
exit(EXIT_FAILURE);
}
deSegment = (nitf_DESegment *) nitf_ListIterator_get(&iter);
deReader = nitf_Reader_newDEReader(reader, count, &e);
if (!deReader)
{
nitf_Error_print(&e, stderr, "Couldnt spawn deserializer");
exit(EXIT_FAILURE);
}
printf("Writing data extension %d... ", count);
/* Write the thing out */
writeDEData(deSegment, inFile, deReader, count, &e);
nitf_SegmentReader_destruct(&segmentReader);
/* Increment the iterator so we can continue */
nitf_ListIterator_increment(&iter);
}
}
nitf_Reader_destruct(&reader);
return record;
}
int main(int argc, char *argv[])
{
nitf_Reader *reader; /* Reader object */
nitf_Record *record; /* Record used for input and output */
nitf_IOHandle in; /* Input I/O handle */
nitf_ListIterator desIter; /* Iterator for getting the DES */
nitf_DESegment *des; /* DE segment to read */
nitf_DEReader *deReader; /* DE reader object for reading data */
char *data; /* Data buffer */
static nitf_Error errorObj; /* Error object for messages */
nitf_Error *error; /* Pointer to the error object */
error = &errorObj;
if (argc != 2)
{
fprintf(stderr, "Usage %s inputFile\n", argv[0]);
exit(EXIT_FAILURE);
}
/* Get the input record */
in = nitf_IOHandle_create(argv[1],
NITF_ACCESS_READONLY, NITF_OPEN_EXISTING,
error);
if (NITF_INVALID_HANDLE(in))
{
nitf_Error_print(error, stderr, "Error opening input ");
exit(EXIT_FAILURE);
}
reader = nitf_Reader_construct(error);
if (!reader)
{
nitf_IOHandle_close(in);
nitf_Error_print(error, stderr, "Error creating reader ");
exit(EXIT_FAILURE);
}
record = nitf_Reader_read(reader, in, error);
if (!record)
{
nitf_Reader_destruct(&reader);
nitf_IOHandle_close(in);
nitf_Error_print(error, stderr, "Error reading input ");
exit(EXIT_FAILURE);
}
/* Print the user header */
desIter = nitf_List_at(record->dataExtensions, 0);
des = (nitf_DESegment *) nitf_ListIterator_get(&desIter);
if (!des)
{
nitf_Reader_destruct(&reader);
nitf_Record_destruct(&record);
nitf_IOHandle_close(in);
nitf_Error_print(error, stderr, "No DE segment in file ");
exit(EXIT_FAILURE);
}
nitf_TRE_print(des->subheader->subheaderFields, error);
/* Read the data and print it */
deReader = nitf_Reader_newDEReader(reader, 0, error);
if (!deReader)
{
nitf_Reader_destruct(&reader);
nitf_Record_destruct(&record);
nitf_IOHandle_close(in);
nitf_Error_print(error, stderr, "Could not create DEReader ");
exit(EXIT_FAILURE);
}
fprintf(stdout, "Data length = %d\n", deReader->user->dataLength);
fprintf(stdout, "Virtual data length = %d\n",
deReader->user->virtualLength);
fprintf(stdout, "File offset = %lld\n", deReader->user->baseOffset);
data = (char *) NITF_MALLOC(deReader->user->virtualLength + 2);
if (!data)
{
nitf_DEReader_destruct(&deReader);
nitf_Reader_destruct(&reader);
nitf_Record_destruct(&record);
nitf_IOHandle_close(in);
nitf_Error_print(error, stderr, "Could not allocate data buffer ");
exit(EXIT_FAILURE);
}
if (!nitf_DEReader_read
(deReader, data, deReader->user->virtualLength, error))
{
NITF_FREE(data);
nitf_DEReader_destruct(&deReader);
nitf_Reader_destruct(&reader);
nitf_Record_destruct(&record);
nitf_IOHandle_close(in);
nitf_Error_print(error, stderr, "Read failed ");
exit(EXIT_FAILURE);
}
fprintf(stdout, "Data: |%s|\n", data);
/* Try some seeks */
if (nitf_DEReader_seek(deReader, (nitf_Off) 4, SEEK_SET, error) == (nitf_Off) - 1)
{
NITF_FREE(data);
nitf_DEReader_destruct(&deReader);
nitf_Reader_destruct(&reader);
nitf_Record_destruct(&record);
nitf_IOHandle_close(in);
nitf_Error_print(error, stderr, "Read failed ");
exit(EXIT_FAILURE);
}
if (!nitf_DEReader_read(deReader, data, 1, error))
{
NITF_FREE(data);
nitf_DEReader_destruct(&deReader);
nitf_Reader_destruct(&reader);
nitf_Record_destruct(&record);
nitf_IOHandle_close(in);
nitf_Error_print(error, stderr, "Read failed ");
exit(EXIT_FAILURE);
}
data[1] = 0;
fprintf(stdout, "Data after set seek: |%s|\n", data);
/*
The last read advanced to position 5 so relative position10 should be
the last byte in the file
*/
if (nitf_DEReader_seek(deReader, (nitf_Off) 10, SEEK_CUR, error) == (nitf_Off) - 1)
{
NITF_FREE(data);
nitf_DEReader_destruct(&deReader);
nitf_Reader_destruct(&reader);
nitf_Record_destruct(&record);
nitf_IOHandle_close(in);
nitf_Error_print(error, stderr, "Read failed ");
exit(EXIT_FAILURE);
}
if (!nitf_DEReader_read(deReader, data, 1, error))
{
NITF_FREE(data);
nitf_DEReader_destruct(&deReader);
nitf_Reader_destruct(&reader);
nitf_Record_destruct(&record);
nitf_IOHandle_close(in);
nitf_Error_print(error, stderr, "Read failed ");
exit(EXIT_FAILURE);
}
data[1] = 0;
fprintf(stdout, "Data after current seek: |%s|\n", data);
if (nitf_DEReader_seek(deReader, (nitf_Off) - 2, SEEK_END, error) == (nitf_Off) - 1)
{
NITF_FREE(data);
nitf_DEReader_destruct(&deReader);
nitf_Reader_destruct(&reader);
nitf_Record_destruct(&record);
nitf_IOHandle_close(in);
nitf_Error_print(error, stderr, "Read failed ");
exit(EXIT_FAILURE);
}
if (!nitf_DEReader_read(deReader, data, 1, error))
{
NITF_FREE(data);
nitf_DEReader_destruct(&deReader);
nitf_Reader_destruct(&reader);
nitf_Record_destruct(&record);
nitf_IOHandle_close(in);
nitf_Error_print(error, stderr, "Read failed ");
exit(EXIT_FAILURE);
}
data[1] = 0;
fprintf(stdout, "Data after end seek: |%s|\n", data);
/* Clean-up */
NITF_FREE(data);
nitf_DEReader_destruct(&deReader);
nitf_Reader_destruct(&reader);
nitf_Record_destruct(&record);
nitf_IOHandle_close(in);
return 0;
}
