ref: cd3679783e1566332abcfb4683292e9350cffa39
dir: /xroff.h/
/* converting scales */
#define SC_IN (dev_res) /* inch in units */
#define SC_PT (SC_IN / 72) /* point in units */
/* predefined array limits */
#define PATHLEN 1024 /* path length */
#define NFONTS 32 /* number of fonts */
#define FNLEN 32 /* font name length */
#define NGLYPHS 512 /* glyphs in fonts */
#define GNLEN 32 /* glyph name length */
#define ILNLEN 256 /* line limit of input files */
#define LNLEN 4000 /* line buffer length (ren.c/out.c) */
#define NWORDS 1000 /* number of words in line buffer */
#define NARGS 9 /* number of macro arguments */
#define RLEN 4 /* register/macro name */
#define LEN(a) (sizeof(a) / sizeof((a)[0]))
/* number registers */
extern int nreg[];
int num_get(int id);
int num_set(int id, int n);
int tr_int(char *s, int orig, int unit);
/* string registers */
void str_set(int id, char *s);
char *str_get(int id);
/* builtin number registers; n_X for .X register */
#define REG(c1, c2) ((c1) * 256 + (c2))
#define n_f nreg[REG('.', 'f')]
#define n_s nreg[REG('.', 's')]
#define n_o nreg[REG('.', 'o')]
#define n_p nreg[REG('.', 'p')]
#define n_l nreg[REG('.', 'l')]
#define n_v nreg[REG('.', 'v')]
#define n_i nreg[REG('.', 'i')]
#define n_f0 nreg[REG('\0', 'f')] /* last font */
#define n_s0 nreg[REG('\0', 's')] /* last size */
#define n_ad nreg[REG('\0', 'a')] /* adjustment */
/* device related variables */
extern int dev_res;
extern int dev_uwid;
extern int dev_hor;
extern int dev_ver;
struct glyph {
char name[FNLEN]; /* name of the glyph */
char id[FNLEN]; /* device-dependent glyph identifier */
struct font *font; /* glyph font */
int wid; /* character width */
int type; /* character type; ascender/descender */
};
struct font {
char name[FNLEN];
struct glyph glyphs[NGLYPHS];
int nglyphs;
int spacewid;
int special;
char c[NGLYPHS][FNLEN]; /* character names in charset */
struct glyph *g[NGLYPHS]; /* character glyphs in charset */
int n; /* number of characters in charset */
};
/* output device functions */
int dev_open(char *path);
void dev_close(void);
int dev_mnt(int pos, char *id, char *name);
int dev_font(char *id);
int charwid(int wid, int sz);
/* font-related functions */
struct font *font_open(char *path);
void font_close(struct font *fn);
struct glyph *font_glyph(struct font *fn, char *id);
struct glyph *font_find(struct font *fn, char *name);
/* glyph handling functions */
struct glyph *dev_glyph(char *c, int fn);
struct glyph *dev_glyph_byid(char *id, int fn);
int dev_spacewid(void);
/* different layers of neatroff */
int in_next(void); /* input layer */
int cp_next(void); /* copy-mode layer */
int tr_next(void); /* troff layer */
void in_push(char *s, char **args);
char *in_arg(int i);
void in_back(int c);
void cp_back(int c);
/* rendering */
void render(void); /* read from in.c and print the output */
void output(char *s); /* output the given rendered line */
/* troff commands */
void tr_br(char **args);
void tr_sp(char **args);
void tr_nr(char **args);
void tr_ps(char **args);
void tr_ft(char **args);
void tr_fp(char **args);
/* helpers */
void errmsg(char *msg, ...);
int utf8len(int c);
/* variable length string buffer */
struct sbuf {
char *s;
int sz;
int n;
};
void sbuf_init(struct sbuf *sbuf);
void sbuf_done(struct sbuf *sbuf);
char *sbuf_buf(struct sbuf *sbuf);
void sbuf_add(struct sbuf *sbuf, int c);
void sbuf_append(struct sbuf *sbuf, char *s);