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Annotation of coherent/d/bin/nroff/code.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * code.h
                      3:  * Nroff/Troff.
                      4:  * Data structure for storing character codes and stream directives.
                      5:  */
                      6: 
                      7: /*
                      8:  * Stream directives.
                      9:  */
                     10: #define DNULL  0                       /* Null                         */
                     11: #define DHMOV  (-1)                    /* Move horizontally            */
                     12: #define DVMOV  (-2)                    /* Move vertically              */
                     13: #define DFONT  (-3)                    /* Change font                  */
                     14: #define DPSZE  (-4)                    /* Change pointsize             */
                     15: #define DSPAR  (-5)                    /* Space down and return        */
                     16: #define DPADC  (-6)                    /* Paddable character           */
                     17: #define DHYPH  (-7)                    /* Place to hyphenate           */
                     18: #define        DHYPC   (-8)                    /* Hyphen character             */
                     19: #define        DTRAB   (-9)                    /* Transparent buffer           */
                     20: #define        DFPOS   (-10)                   /* Fix position                 */
                     21: #define        DHLIN   (-11)                   /* Horizontal line              */
                     22: #define        DVLIN   (-12)                   /* Vertical line                */
                     23: 
                     24: /*
                     25:  * All characters and commands are stored in this structure.
                     26:  * To identify whether an element is a character or a command,
                     27:  * call the function ifcchar(element) which returns 1 if the
                     28:  * element is a character code and 0 if the element is a command.
                     29:  */
                     30: typedef        union   {
                     31:        struct c_arg {                  /* Structure containing character */
                     32:                int     c_code;         /* Character code               */
                     33:                unsigned c_move;        /* Distance to move after char  */
                     34:        } c_arg;
                     35:        struct l_arg {                  /* Command with one int argument */
                     36:                int     c_code;         /* Type of command              */
                     37:                int     c_iarg;         /* Int parameter                */
                     38:        } l_arg;
                     39:        struct b_arg {                  /* Command with buffer ptr. (dag)*/
                     40:                int     c_code;         /* Type of command              */
                     41:                char    *c_bufp;        /* Pointer to buffer            */
                     42:        } b_arg;
                     43: } CODE;
                     44: 
                     45: /*
                     46:  * Macros testing whether an element is a character code
                     47:  * or a stream directive.
                     48:  */
                     49: #define is_char(c)     ((c) > 0)
                     50: #define is_dir(c)      ((c) < 0)
                     51: 
                     52: /*
                     53:  * Global variables.
                     54:  */
                     55: extern CODE    codeval;                /* Diversion struct returned by getl */
                     56: 
                     57: /* end of code.h */

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