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- /*------------------------------------------------------------------------------
- * File: df.h
- * Purpose: header file for HDF routines
- * Invokes: dfi.h
- * Contents:
- * Structure definitions: DFddh, DFdd, DFdesc, DFdle, DF, DFdi, DFdata
- * Procedure type definitions
- * Global variables
- * Tag definitions
- * Error return codes
- * Logical constants
- * Remarks: This file is included with user programs
- * Since it includes stdio.h etc., do not include these after df.h
- *----------------------------------------------------------------------------*/
-
-
- #ifndef DFTG_NULL /* avoid re-inclusion */
-
- /* include DF (internal) header information */
- #include "dfi.h"
-
- /*--------------------------------------------------------------------------*/
- /* Type declarations */
-
- typedef struct DFddh { /* format of data descriptor headers as in file */
- int16
- dds; /* number of dds in header block */
- int32
- next; /* offset of next header block */
- } DFddh;
-
-
- typedef struct DFdd { /* format of data descriptors as in file */
- uint16
- tag, /* data tag */
- ref; /* data reference number */
- int32
- offset, /* offset of data element in file */
- length; /* number of bytes */
- } DFdd;
-
-
- /* descriptor structure is same as dd structure. ###Note: may be changed */
- #define DFdesc DFdd
-
-
- /* DLE is the internal structure which stores data descriptor information */
- /* It is a linked list of DDs */
- typedef struct DFdle { /* Data List element */
- struct DFdle
- *next; /* link to next dle */
- DFddh
- ddh; /* To store headers */
- DFdd
- dd[1]; /* dummy size */
- } DFdle;
-
-
- /* DF is the internal structure associated with each DF file */
- /* It holds information associated with the file as a whole */
- /* ### Note: there are hooks for having multiple DF files open at a time */
- typedef struct DF {
- DFdle
- *list, /* Pointer to the DLE list */
- *last_dle; /* last_dle and last_dd are used in searches to indicate
- element returned by previous call to DFfind */
- int
- type, /* 0= not in use, 1= normal, -1 = multiple */
- /* this is a hook for when multiple files are open */
- access, /* permitted access types: 0=none, 1=r, 2=w, 3=r/w */
- changed, /* True if anything in DDs modified since last write */
- last_tag, /* Last tag searched for by DFfind */
- last_ref, /* Last reference number searched for */
- last_dd, /* see last_dle */
- defdds, /* default numer of DD's in each block */
- up_access; /* access permissions to element being read/updated */
- /* Used by DFstart */
- DFdd
- *up_dd; /* DD of element being read/updated, used by DFstart */
- /* file handle is a file pointer or file descriptor */
- /* depending on whether we use buffered or unbuffered i/o */
- #ifdef DF_BUFFIO
- FILE * /* file pointer */
- #else DF_BUFFIO
- int /* file descriptor */
- #endif DF_BUFFIO
- file; /* File handle for real file */
- } DF;
-
-
- typedef struct DFdi { /* data identifier: specifies data element uniquely */
- uint16 tag;
- uint16 ref;
- } DFdi;
-
-
-
- typedef struct DFdata { /* structure for returning status information */
- int version; /* version number of stat information */
- } DFdata;
-
- /*--------------------------------------------------------------------------*/
- /* Procedure types */
-
- DF *DFopen();
- int32 DFgetelement();
- int32 DFread();
- int32 DFseek();
- int32 DFwrite();
-
- /*--------------------------------------------------------------------------*/
- /* Global Variables */
-
- #ifndef DFMASTER
- extern
- #endif DFMASTER
- int
- DFerror; /* Error code for DF routines */
-
- /*--------------------------------------------------------------------------*/
- /* Tag Definitions */
-
- #define DFREF_WILDCARD 0 /* wildcard ref for searches */
-
- #define DFTG_WILDCARD 0 /* wildcard tag for searches */
- #define DFTG_NULL 1 /* empty DD */
-
- #define DFTG_FID 100 /* File identifier */
- #define DFTG_FD 101 /* File description */
- #define DFTG_TID 102 /* Tag identifier */
- #define DFTG_TD 103 /* Tag descriptor */
- #define DFTG_DIL 104 /* data identifier label */
- #define DFTG_DIA 105 /* data identifier annotation */
- #define DFTG_NT 106 /* number type */
- #define DFTG_MT 107 /* machine type */
-
- #define DFTG_ID8 200 /* 8-bit Image dimension */
- #define DFTG_IP8 201 /* 8-bit Image palette */
- #define DFTG_RI8 202 /* Raster-8 image */
- #define DFTG_CI8 203 /* RLE compressed 8-bit image */
- #define DFTG_II8 204 /* IMCOMP compressed 8-bit image */
-
- #define DFTG_ID 300 /* Image DimRec */
- #define DFTG_LUT 301 /* Image Palette */
- #define DFTG_RI 302 /* Raster Image */
- #define DFTG_CI 303 /* Compressed Image */
-
- #define DFTG_RIG 306 /* Raster Image Group */
- #define DFTG_LD 307 /* Palette DimRec */
- #define DFTG_MD 308 /* Matte DimRec */
- #define DFTG_MA 309 /* Matte Data */
- #define DFTG_CCN 310 /* color correction */
- #define DFTG_CFM 311 /* color format */
- #define DFTG_AR 312 /* aspect ratio */
-
- #define DFTG_DRAW 400 /* Draw these images in sequence */
- #define DFTG_RUN 401 /* run this as a program/script */
-
- #define DFTG_XYP 500 /* x-y position */
- #define DFTG_MTO 501 /* machine-type override */
-
- #define DFTG_T14 602 /* TEK 4014 data */
- #define DFTG_T105 603 /* TEK 4105 data */
-
- /* compression schemes */
- #define DFTG_RLE 11 /* run length encoding */
- #define DFTG_IMCOMP 12 /* IMCOMP compression */
-
- /*--------------------------------------------------------------------------*/
- /* Error Return Codes */
-
- #define DFE_NOERROR 0 /* No error */
- #define DFE_FNF -1 /* File not found error */
- #define DFE_DENIED -2 /* Access to file denied */
- #define DFE_ALROPEN -3 /* File already open */
- #define DFE_TOOMANY -4 /* Too Many DF's or files open */
- #define DFE_BNAME -5 /* Bad file name on open */
- #define DFE_BACC -6 /* Bad file access mode */
- #define DFE_BOPEN -7 /* Other open error */
- #define DFE_NOTOPEN -8 /* File can't be closed 'cause it isn't open */
- #define DFE_CANTCLOSE -9 /* fclose wouldn't work! */
- #define DFE_DFNULL -10 /* DF is a null pointer */
- #define DFE_ILLTYPE -11 /* DF has an illegal type: internal error */
- #define DFE_UNSUPPORTED -12 /* Feature not currently supported */
- #define DFE_BDDLIST -13 /* The DD list is non-existent: internal error */
- #define DFE_NOTDFFILE -14 /* This is not a DF file and it is not 0 length */
- #define DFE_SEEDTWICE -15 /* The DD list already seeded: internal error */
- #define DFE_NOSPACE -16 /* Malloc failed */
- #define DFE_NOSUCHTAG -17 /* There is no such tag in the file: search failed*/
- #define DFE_READERROR -18 /* There was a read error */
- #define DFE_WRITEERROR -19 /* There was a write error */
- #define DFE_SEEKERROR -20 /* There was a seek error */
- #define DFE_NOFREEDD -21 /* There are no free DD's left: internal error */
- #define DFE_BTAG -22 /* illegal WILDCARD tag */
- #define DFE_BREF -23 /* illegal WILDCARD reference # */
- #define DFE_RDONLY -24 /* The DF is read only */
- #define DFE_BCALL -25 /* Calls in wrong order */
- #define DFE_BPTR -26 /* NULL ptr argument */
- #define DFE_BLEN -27 /* negative len specified */
- #define DFE_BSEEK -28 /* Attempt to seek past end of element */
- #define DFE_NOMATCH -29 /* No (more) DDs which match specified tag/ref */
- #define DFE_NOTINSET -30 /* Warning: Set contained unknown tag: ignored */
- #define DFE_BDIM -31 /* negative or zero dimensions specified */
- #define DFE_BOFFSET -32 /* Illegal offset specified */
- #define DFE_BSCHEME -33 /* Unknown compression scheme specified */
- #define DFE_NODIM -34 /* No dimension record associated with image */
- #define DFE_NOTENOUGH -35 /* space provided insufficient for size of data */
-
- /*--------------------------------------------------------------------------*/
- /* Logical Constants */
-
- #define DFACC_READ 1 /* Read Access */
- #define DFACC_WRITE 2 /* Write Access */
- #define DFACC_CREATE 4 /* force file to be created */
- #define DFACC_ALL 7 /* the logical and of all the above values */
-
- #endif DFTG_NULL
-