static int pj_gridinfo_init_ntv2( projCtx ctx, PAFile fid, PJ_GRIDINFO *gilist )
{
unsigned char header[11*16];
int num_subfiles, subfile;
int must_swap;
/* cppcheck-suppress sizeofCalculation */
STATIC_ASSERT( sizeof(pj_int32) == 4 );
/* cppcheck-suppress sizeofCalculation */
STATIC_ASSERT( sizeof(double) == 8 );
/* -------------------------------------------------------------------- */
/* Read the overview header. */
/* -------------------------------------------------------------------- */
if( pj_ctx_fread( ctx, header, sizeof(header), 1, fid ) != 1 )
{
pj_ctx_set_errno( ctx, PJD_ERR_FAILED_TO_LOAD_GRID );
return 0;
}
if( header[8] == 11 )
must_swap = !IS_LSB;
else
must_swap = IS_LSB;
/* -------------------------------------------------------------------- */
/* Byte swap interesting fields if needed. */
/* -------------------------------------------------------------------- */
if( must_swap )
{
swap_words( header+8, 4, 1 );
swap_words( header+8+16, 4, 1 );
swap_words( header+8+32, 4, 1 );
swap_words( header+8+7*16, 8, 1 );
swap_words( header+8+8*16, 8, 1 );
swap_words( header+8+9*16, 8, 1 );
swap_words( header+8+10*16, 8, 1 );
}
/* -------------------------------------------------------------------- */
/* Get the subfile count out ... all we really use for now. */
/* -------------------------------------------------------------------- */
memcpy( &num_subfiles, header+8+32, 4 );
/* ==================================================================== */
/* Step through the subfiles, creating a PJ_GRIDINFO for each. */
/* ==================================================================== */
for( subfile = 0; subfile < num_subfiles; subfile++ )
{
struct CTABLE *ct;
LP ur;
int gs_count;
PJ_GRIDINFO *gi;
/* -------------------------------------------------------------------- */
/* Read header. */
/* -------------------------------------------------------------------- */
if( pj_ctx_fread( ctx, header, sizeof(header), 1, fid ) != 1 )
{
pj_ctx_set_errno( ctx, PJD_ERR_FAILED_TO_LOAD_GRID );
return 0;
}
if( strncmp((const char *) header,"SUB_NAME",8) != 0 )
{
pj_ctx_set_errno( ctx, PJD_ERR_FAILED_TO_LOAD_GRID );
return 0;
}
/* -------------------------------------------------------------------- */
/* Byte swap interesting fields if needed. */
/* -------------------------------------------------------------------- */
if( must_swap )
{
swap_words( header+8+16*4, 8, 1 );
swap_words( header+8+16*5, 8, 1 );
swap_words( header+8+16*6, 8, 1 );
swap_words( header+8+16*7, 8, 1 );
swap_words( header+8+16*8, 8, 1 );
swap_words( header+8+16*9, 8, 1 );
swap_words( header+8+16*10, 4, 1 );
}
/* -------------------------------------------------------------------- */
/* Initialize a corresponding "ct" structure. */
/* -------------------------------------------------------------------- */
ct = (struct CTABLE *) pj_malloc(sizeof(struct CTABLE));
if (!ct) {
pj_ctx_set_errno(ctx, ENOMEM);
return 0;
}
strncpy( ct->id, (const char *) header + 8, 8 );
ct->id[8] = '\0';
ct->ll.lam = - to_double(header+7*16+8); /* W_LONG */
ct->ll.phi = to_double(header+4*16+8); /* S_LAT */
ur.lam = - to_double(header+6*16+8); /* E_LONG */
ur.phi = to_double(header+5*16+8); /* N_LAT */
ct->del.lam = to_double(header+9*16+8);
ct->del.phi = to_double(header+8*16+8);
ct->lim.lam = (pj_int32) (fabs(ur.lam-ct->ll.lam)/ct->del.lam + 0.5) + 1;
ct->lim.phi = (pj_int32) (fabs(ur.phi-ct->ll.phi)/ct->del.phi + 0.5) + 1;
pj_log( ctx, PJ_LOG_DEBUG_MINOR,
"NTv2 %s %dx%d: LL=(%.9g,%.9g) UR=(%.9g,%.9g)",
ct->id,
ct->lim.lam, ct->lim.phi,
ct->ll.lam/3600.0, ct->ll.phi/3600.0,
ur.lam/3600.0, ur.phi/3600.0 );
ct->ll.lam *= DEG_TO_RAD/3600.0;
ct->ll.phi *= DEG_TO_RAD/3600.0;
ct->del.lam *= DEG_TO_RAD/3600.0;
ct->del.phi *= DEG_TO_RAD/3600.0;
memcpy( &gs_count, header + 8 + 16*10, 4 );
if( gs_count != ct->lim.lam * ct->lim.phi )
{
pj_log( ctx, PJ_LOG_ERROR,
"GS_COUNT(%d) does not match expected cells (%dx%d=%d)",
gs_count, ct->lim.lam, ct->lim.phi,
ct->lim.lam * ct->lim.phi );
pj_dalloc(ct);
pj_ctx_set_errno( ctx, PJD_ERR_FAILED_TO_LOAD_GRID );
return 0;
}
ct->cvs = NULL;
/* -------------------------------------------------------------------- */
/* Create a new gridinfo for this if we aren't processing the */
/* 1st subfile, and initialize our grid info. */
/* -------------------------------------------------------------------- */
if( subfile == 0 )
gi = gilist;
else
{
gi = (PJ_GRIDINFO *) pj_calloc(1, sizeof(PJ_GRIDINFO));
if (!gi) {
pj_dalloc(ct);
pj_gridinfo_free(ctx, gilist);
pj_ctx_set_errno(ctx, ENOMEM);
return 0;
}
gi->gridname = pj_strdup( gilist->gridname );
gi->filename = pj_strdup( gilist->filename );
if (!gi->gridname || !gi->filename) {
pj_gridinfo_free(ctx, gi);
pj_dalloc(ct);
pj_gridinfo_free(ctx, gilist);
pj_ctx_set_errno(ctx, ENOMEM);
return 0;
}
gi->next = NULL;
}
gi->must_swap = must_swap;
gi->ct = ct;
gi->format = "ntv2";
gi->grid_offset = pj_ctx_ftell( ctx, fid );
/* -------------------------------------------------------------------- */
/* Attach to the correct list or sublist. */
/* -------------------------------------------------------------------- */
if( strncmp((const char *)header+24,"NONE",4) == 0 )
{
if( gi != gilist )
{
PJ_GRIDINFO *lnk;
for( lnk = gilist; lnk->next != NULL; lnk = lnk->next ) {}
lnk->next = gi;
}
}
else
{
PJ_GRIDINFO *lnk;
PJ_GRIDINFO *gp = gridinfo_parent(gilist,
(const char*)header+24,8);
if( gp == NULL )
{
pj_log( ctx, PJ_LOG_ERROR,
"pj_gridinfo_init_ntv2(): "
"failed to find parent %8.8s for %s.",
(const char *) header+24, gi->ct->id );
for( lnk = gilist; lnk->next != NULL; lnk = lnk->next ) {}
lnk->next = gi;
}
else
{
if( gp->child == NULL )
{
gp->child = gi;
}
else
{
for( lnk = gp->child; lnk->next != NULL; lnk = lnk->next ) {}
lnk->next = gi;
}
}
}
/* -------------------------------------------------------------------- */
/* Seek past the data. */
/* -------------------------------------------------------------------- */
pj_ctx_fseek( ctx, fid, gs_count * 16, SEEK_CUR );
}
return 1;
}
static int pj_gridinfo_init_ntv1( projCtx ctx, PAFile fid, PJ_GRIDINFO *gi )
{
unsigned char header[176];
struct CTABLE *ct;
LP ur;
/* cppcheck-suppress sizeofCalculation */
STATIC_ASSERT( sizeof(pj_int32) == 4 );
/* cppcheck-suppress sizeofCalculation */
STATIC_ASSERT( sizeof(double) == 8 );
/* -------------------------------------------------------------------- */
/* Read the header. */
/* -------------------------------------------------------------------- */
if( pj_ctx_fread( ctx, header, sizeof(header), 1, fid ) != 1 )
{
pj_ctx_set_errno( ctx, PJD_ERR_FAILED_TO_LOAD_GRID );
return 0;
}
/* -------------------------------------------------------------------- */
/* Regularize fields of interest. */
/* -------------------------------------------------------------------- */
if( IS_LSB )
{
swap_words( header+8, 4, 1 );
swap_words( header+24, 8, 1 );
swap_words( header+40, 8, 1 );
swap_words( header+56, 8, 1 );
swap_words( header+72, 8, 1 );
swap_words( header+88, 8, 1 );
swap_words( header+104, 8, 1 );
}
if( *((int *) (header+8)) != 12 )
{
pj_log( ctx, PJ_LOG_ERROR,
"NTv1 grid shift file has wrong record count, corrupt?" );
pj_ctx_set_errno( ctx, PJD_ERR_FAILED_TO_LOAD_GRID );
return 0;
}
/* -------------------------------------------------------------------- */
/* Fill in CTABLE structure. */
/* -------------------------------------------------------------------- */
ct = (struct CTABLE *) pj_malloc(sizeof(struct CTABLE));
if (!ct) {
pj_ctx_set_errno(ctx, ENOMEM);
return 0;
}
strcpy( ct->id, "NTv1 Grid Shift File" );
ct->ll.lam = - to_double(header+72);
ct->ll.phi = to_double(header+24);
ur.lam = - to_double(header+56);
ur.phi = to_double(header+40);
ct->del.lam = to_double(header+104);
ct->del.phi = to_double(header+88);
ct->lim.lam = (pj_int32) (fabs(ur.lam-ct->ll.lam)/ct->del.lam + 0.5) + 1;
ct->lim.phi = (pj_int32) (fabs(ur.phi-ct->ll.phi)/ct->del.phi + 0.5) + 1;
pj_log( ctx, PJ_LOG_DEBUG_MINOR,
"NTv1 %dx%d: LL=(%.9g,%.9g) UR=(%.9g,%.9g)",
ct->lim.lam, ct->lim.phi,
ct->ll.lam, ct->ll.phi, ur.lam, ur.phi );
ct->ll.lam *= DEG_TO_RAD;
ct->ll.phi *= DEG_TO_RAD;
ct->del.lam *= DEG_TO_RAD;
ct->del.phi *= DEG_TO_RAD;
ct->cvs = NULL;
gi->ct = ct;
gi->grid_offset = pj_ctx_ftell( ctx, fid );
gi->format = "ntv1";
return 1;
}
static int pj_gridinfo_init_ntv1( projCtx ctx, PAFile fid, PJ_GRIDINFO *gi )
{
unsigned char header[176];
struct CTABLE *ct;
LP ur;
assert( sizeof(int) == 4 );
assert( sizeof(double) == 8 );
if( sizeof(int) != 4 || sizeof(double) != 8 )
{
pj_log( ctx, PJ_LOG_ERROR,
"basic types of inappropraiate size in nad_load_ntv1()" );
pj_ctx_set_errno( ctx, -38 );
return 0;
}
/* -------------------------------------------------------------------- */
/* Read the header. */
/* -------------------------------------------------------------------- */
if( pj_ctx_fread( ctx, header, sizeof(header), 1, fid ) != 1 )
{
pj_ctx_set_errno( ctx, -38 );
return 0;
}
/* -------------------------------------------------------------------- */
/* Regularize fields of interest. */
/* -------------------------------------------------------------------- */
if( IS_LSB )
{
swap_words( header+8, 4, 1 );
swap_words( header+24, 8, 1 );
swap_words( header+40, 8, 1 );
swap_words( header+56, 8, 1 );
swap_words( header+72, 8, 1 );
swap_words( header+88, 8, 1 );
swap_words( header+104, 8, 1 );
}
if( *((int *) (header+8)) != 12 )
{
pj_log( ctx, PJ_LOG_ERROR,
"NTv1 grid shift file has wrong record count, corrupt?" );
pj_ctx_set_errno( ctx, -38 );
return 0;
}
/* -------------------------------------------------------------------- */
/* Fill in CTABLE structure. */
/* -------------------------------------------------------------------- */
ct = (struct CTABLE *) pj_malloc(sizeof(struct CTABLE));
strcpy( ct->id, "NTv1 Grid Shift File" );
ct->ll.lam = - *((double *) (header+72));
ct->ll.phi = *((double *) (header+24));
ur.lam = - *((double *) (header+56));
ur.phi = *((double *) (header+40));
ct->del.lam = *((double *) (header+104));
ct->del.phi = *((double *) (header+88));
ct->lim.lam = (int) (fabs(ur.lam-ct->ll.lam)/ct->del.lam + 0.5) + 1;
ct->lim.phi = (int) (fabs(ur.phi-ct->ll.phi)/ct->del.phi + 0.5) + 1;
pj_log( ctx, PJ_LOG_DEBUG_MINOR,
"NTv1 %dx%d: LL=(%.9g,%.9g) UR=(%.9g,%.9g)",
ct->lim.lam, ct->lim.phi,
ct->ll.lam, ct->ll.phi, ur.lam, ur.phi );
ct->ll.lam *= DEG_TO_RAD;
ct->ll.phi *= DEG_TO_RAD;
ct->del.lam *= DEG_TO_RAD;
ct->del.phi *= DEG_TO_RAD;
ct->cvs = NULL;
gi->ct = ct;
gi->grid_offset = pj_ctx_ftell( ctx, fid );
gi->format = "ntv1";
return 1;
}