ref: 4df77191c3b7d1c09255c9aaf0e159f7af20902d
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 NPREV 16 /* environment stack depth */
#define NTRAPS 1024 /* number of traps per page */
#define NIES 128 /* number of nested .ie commands */
/* escape sequences */
#define ESC_Q "bCDhHlLNoSvwxX" /* quoted escape sequences */
#define ESC_P "*fgkns" /* 1 or 2-char escape sequences */
#define LEN(a) (sizeof(a) / sizeof((a)[0]))
/* number registers */
char *num_get(int id);
int *nreg(int id);
int eval(char *s, int orig, int unit);
/* string registers */
void str_set(int id, char *s);
void str_dset(int id, void *d);
char *str_get(int id);
void *str_dget(int id);
void str_rm(int id);
void str_rn(int src, int dst);
/* saving and restoring registers before and after printing diverted lines */
void odiv_beg(void);
void odiv_end(void);
/* enviroments */
void env_init(void);
void env_free(void);
struct adj *env_adj(void);
/* 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 */
};
/* troff output function */
#define OUT printf
/* 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);
void cp_skip(void); /* skip current input line or block */
/* rendering */
void render(void); /* read from in.c and print the output */
void output(char *s); /* output the given rendered line */
void ren_page(int pg);
int trap_next(void);
/* troff commands */
void tr_bp(char **args);
void tr_br(char **args);
void tr_ch(char **args);
void tr_di(char **args);
void tr_divbeg(char **args);
void tr_divend(char **args);
void tr_dt(char **args);
void tr_ev(char **args);
void tr_fi(char **args);
void tr_fp(char **args);
void tr_ft(char **args);
void tr_in(char **args);
void tr_ne(char **args);
void tr_nf(char **args);
void tr_ps(char **args);
void tr_sp(char **args);
void tr_wh(char **args);
void tr_init(void);
/* 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);
void sbuf_putnl(struct sbuf *sbuf);
int sbuf_empty(struct sbuf *sbuf);
/* diversions */
#define DIV_BEG ".&<"
#define DIV_END ".&>"
/* adjustment */
#define ADJ_L 0
#define ADJ_B 1
#define ADJ_N 2 /* no adjustment (.nf) */
struct adj *adj_alloc(void);
void adj_free(struct adj *adj);
int adj_fill(struct adj *adj, int mode, int linelen, char *dst);
void adj_put(struct adj *adj, int wid, char *s, ...);
void adj_swid(struct adj *adj, int swid);
int adj_full(struct adj *adj, int mode, int linelen);
int adj_empty(struct adj *adj, int mode);
/* builtin number registers; n_X for .X register */
#define REG(c1, c2) ((c1) * 256 + (c2))
#define n_d (*nreg(REG('.', 'd')))
#define n_f (*nreg(REG('.', 'f')))
#define n_i (*nreg(REG('.', 'i')))
#define n_j (*nreg(REG('.', 'j')))
#define n_l (*nreg(REG('.', 'l')))
#define n_n (*nreg(REG('.', 'n')))
#define n_o (*nreg(REG('.', 'o')))
#define n_p (*nreg(REG('.', 'p')))
#define n_s (*nreg(REG('.', 's')))
#define n_u (*nreg(REG('.', 'u')))
#define n_v (*nreg(REG('.', 'v')))
#define n_dl (*nreg(REG('d', 'l')))
#define n_dn (*nreg(REG('d', 'n')))
#define n_nl (*nreg(REG('n', 'l')))
#define n_pg (*nreg(REG('%', '\0'))) /* % */
#define n_f0 (*nreg(REG(0, 'f'))) /* last font */
#define n_s0 (*nreg(REG(0, 's'))) /* last size */