/usr/include/xgks/gksm_implem.h is in libxgks-dev 2.6.1+dfsg.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* $Id: gksm_implem.h,v 2.5.4.1 1993/03/10 19:44:23 steve Exp $
*
* This file contains implementation-specific definitions and declarations
* for the GKS Metafile (GKSM) implementaion of an XGKS Metafile.
*
* This file requires header-file "../gks_implem.h".
*/
#ifndef GKSM_IMPLEM_H_SEEN
#define GKSM_IMPLEM_H_SEEN
/*
* Workstation information specific to GKS Metafiles (GKSM):
*/
typedef struct mf_gksm {
MF_COMMON
Gchar std[5]; /* the string GKSM + '\0' */
Gchar info[41]; /* author installation etc. + '\0' */
Gchar date[9]; /* yy/mm/dd + '\0' */
Gint ver; /* version number */
Gint h; /* Number of bytes of "GKSM" at start of each
* item record (0-4) */
Gint t; /* length of item-type indicator field */
Gint l; /* length of item data-record length-indicator
* field */
Gint i; /* length of field for each integer in the
* item data-record */
Gint r; /* length of field for each real in the item
* data-record */
Gint f; /* Number representation indicator:
* 1: all numbers formatted according
* to ISO 6093
* 2: all numbers stored in internal
* binary format. */
Gint ri; /* Representation of real values:
* 1: real
* 2: integer */
Gchar d1[12]; /* Integer equivalent to 0.0 iff ri==2 */
Gchar d2[12]; /* Integer equivalent to 1.0 iff ri==2 */
} mf_gksm;
typedef Gchar *CHARPTR;
typedef Gint *INTPTR;
typedef Gpoint *POINTPTR;
/*
* NB: Because of the hard-coded formats in the following, the GKSM
* implementation can ONLY READ FILES THAT IT CREATED.
*/
#define READHINT(fptr, i) fscanf((fptr), "%2d", (int*)(&(i)))
#define READCHR(fptr, chr) fscanf((fptr), "%c", (char*)&(chr))
/* Number of repeated bytes of the string "GKSM" in each item-header */
#define GKSM_LENGTH 0
/* Item-header identification number */
#define ITEM_TYPE_LENGTH 3
#define ITEM_TYPE_FMT "%3d"
/* Item-header length of data-record */
#define ITEM_DREC_LENGTH 6
#define ITEM_LENGTH_FMT "%6d"
/* Data-record integer values */
#define INT_FIELD_LENGTH 6
#define INT_FMT "%6d"
#define INT_FMT_SCAN "%6c"
#define READINT(fptr, i) fscanf((fptr), " %d%*[ ]", (int*)(&(i)))
/* Data-record floating-point values */
#define FLOAT_FIELD_LENGTH 11
#define FLOAT_FMT "%11.5f"
#define FLOAT_FMT_SCAN "%11c"
#define READFTP(fptr, ftp) fscanf((fptr), " %f%*[ ]", (float*)&(ftp))
/* Type of representation of numbers (1=>formatted; 2=>unformatted) */
#define OUTPUT_FMT_TYPE 1
/*
* Type of representation of floating-point numbers iff OUTPUT_FMT_TYPE == 2
* (1=>real; 2=>integer)
*/
#define NUMBER_REP 1
#define INT_SIZE sizeof(Gint)
#define FLOAT_SIZE sizeof(Gfloat)
#define POINT_SIZE sizeof(Gpoint)
#define IPOINT_SIZE sizeof(Gipoint)
#define LIMIT_SIZE sizeof(Glimit)
#define CHARPTR_SIZE sizeof(CHARPTR)
#define INTPTR_SIZE sizeof(INTPTR)
#define POINTPTR_SIZE sizeof(POINTPTR)
#endif /* GKSM_IMPLEM_H_SEEN not defined above */
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