9 #define NENVS 64 /* number of environment registers */
12 int eregs
[NENVS
]; /* environment-specific number registers */
13 int tabs
[NTABS
]; /* tab stops */
14 char tabs_type
[NTABS
]; /* type of tabs: L, C, R */
15 struct adj
*adj
; /* per environment line buffer */
16 char tc
[GNLEN
]; /* tab character (.tc) */
17 char lc
[GNLEN
]; /* leader character (.lc) */
18 char hc
[GNLEN
]; /* hyphenation character (.hc) */
19 char mc
[GNLEN
]; /* margin character (.mc) */
22 static int nregs
[NREGS
]; /* global number registers */
23 static int nregs_inc
[NREGS
]; /* number register auto-increment size */
24 static int nregs_fmt
[NREGS
]; /* number register format */
25 static char *sregs
[NREGS
]; /* global string registers */
26 static void *sregs_dat
[NREGS
]; /* builtin function data */
27 static struct env
*envs
[NREGS
];/* environments */
28 static struct env
*env
; /* current enviroment */
29 static int env_id
; /* current environment id */
30 static int eregs_idx
[NREGS
]; /* register environment index in eregs[] */
32 static char *eregs
[] = { /* environment-specific number registers */
33 "ln", ".f", ".i", ".j", ".l",
34 ".L", ".nI", ".nm", ".nM", ".nn",
35 ".nS", ".m", ".s", ".u", ".v",
36 ".it", ".itn", ".mc", ".mcn",
37 ".ce", ".f0", ".hy", ".i0", ".l0",
38 ".L0", ".m0", ".n0", ".s0", ".ss",
42 /* return the address of a number register */
46 return &env
->eregs
[eregs_idx
[id
]];
50 static int num_fmt(char *s
, int n
, int fmt
);
52 /* the contents of a number register (returns a static buffer) */
55 static char numbuf
[128];
56 char *s
= map_name(id
);
58 if (s
[0] == '.' && !s
[2]) {
61 sprintf(numbuf
, "%d", dev_getbd(n_f
));
64 sprintf(numbuf
, "%d", in_lnum());
67 sprintf(numbuf
, "%d", f_hpos());
70 sprintf(numbuf
, "#%02x%02x%02x", CLR_R(n_m
), CLR_G(n_m
), CLR_B(n_m
));
73 sprintf(numbuf
, "%d", f_nexttrap());
77 sprintf(numbuf
, "%s", map_name(f_divreg()));
80 sprintf(numbuf
, "%s", in_filename());
83 sprintf(numbuf
, "%d", in_nargs());
87 if (id
== map("yr")) {
88 sprintf(numbuf
, "%02d", nregs
[id
]);
91 if (!nregs_fmt
[id
] || num_fmt(numbuf
, *nreg(id
), nregs_fmt
[id
]))
92 sprintf(numbuf
, "%d", *nreg(id
));
96 void num_set(int id
, int val
)
101 void num_inc(int id
, int val
)
113 int num_get(int id
, int inc
)
116 *nreg(id
) += inc
> 0 ? nregs_inc
[id
] : -nregs_inc
[id
];
120 void str_set(int id
, char *s
)
122 int len
= strlen(s
) + 1;
125 sregs
[id
] = malloc(len
);
126 memcpy(sregs
[id
], s
, len
);
127 sregs_dat
[id
] = NULL
;
130 char *str_get(int id
)
135 void *str_dget(int id
)
137 return sregs_dat
[id
];
140 void str_dset(int id
, void *d
)
150 sregs_dat
[id
] = NULL
;
153 void str_rn(int src
, int dst
)
156 sregs
[dst
] = sregs
[src
];
157 sregs_dat
[dst
] = sregs_dat
[src
];
159 sregs_dat
[src
] = NULL
;
162 static struct env
*env_alloc(void)
164 struct env
*env
= malloc(sizeof(*env
));
165 memset(env
, 0, sizeof(*env
));
166 env
->adj
= adj_alloc();
170 static void env_free(struct env
*env
)
176 static void env_set(int id
)
182 envs
[id
] = env_alloc();
187 n_l
= SC_IN
* 65 / 10;
195 n_lt
= SC_IN
* 65 / 10;
200 strcpy(env
->hc
, "\\%");
201 strcpy(env
->lc
, ".");
202 adj_ll(env
->adj
, n_l
);
203 adj_in(env
->adj
, n_i
);
204 for (i
= 0; i
< NTABS
; i
++)
205 env
->tabs
[i
] = i
* SC_IN
/ 2;
209 static void init_time(void)
211 time_t t
= time(NULL
);
212 struct tm
*tm
= localtime(&t
);
213 nregs
[map("dw")] = tm
->tm_wday
+ 1;
214 nregs
[map("dy")] = tm
->tm_mday
;
215 nregs
[map("mo")] = tm
->tm_mon
+ 1;
216 nregs
[map("yr")] = tm
->tm_year
% 100;
223 for (i
= 0; i
< LEN(eregs
); i
++)
224 eregs_idx
[map(eregs
[i
])] = i
+ 1;
231 for (i
= 0; i
< LEN(envs
); i
++)
236 static int oenv
[NPREV
]; /* environment stack */
239 void tr_ev(char **args
)
245 id
= nenv
? oenv
[--nenv
] : -1;
248 if (args
[1] && env
&& nenv
< NPREV
)
249 oenv
[nenv
++] = env_id
;
253 struct adj
*env_adj(void)
278 /* saving and restoring registers around diverted lines */
280 int f
, s
, m
, f0
, s0
, m0
;
283 static struct odiv odivs
[NPREV
]; /* state before diverted text */
286 /* begin outputting diverted line */
289 struct odiv
*o
= &odivs
[nodivs
++];
298 /* end outputting diverted line */
301 struct odiv
*o
= &odivs
[--nodivs
];
310 void tr_ta(char **args
)
314 for (i
= 0; i
< NARGS
&& args
[i
]; i
++) {
315 env
->tabs
[i
] = eval_re(args
[i
], i
> 0 ? env
->tabs
[i
- 1] : 0, 'm');
316 s
= args
[i
][0] ? strchr(args
[i
], '\0') - 1 : "";
317 env
->tabs_type
[i
] = strchr("LRC", *s
) ? *s
: 'L';
321 static int tab_idx(int pos
)
324 for (i
= 0; i
< LEN(env
->tabs
); i
++)
325 if (env
->tabs
[i
] > pos
)
330 int tab_next(int pos
)
332 int i
= tab_idx(pos
);
333 return i
>= 0 ? env
->tabs
[i
] : pos
;
336 int tab_type(int pos
)
338 int i
= tab_idx(pos
);
339 return i
>= 0 && env
->tabs_type
[i
] ? env
->tabs_type
[i
] : 'L';
342 /* number register format (.af) */
343 #define NF_LSH 8 /* number format length shifts */
344 #define NF_FMT 0x00ff /* number format mask */
346 /* the format of a number register (returns a static buffer) */
347 char *num_getfmt(int id
)
349 static char fmtbuf
[128];
352 if (!nregs_fmt
[id
] || (nregs_fmt
[id
] & NF_FMT
) == '0') {
354 i
= nregs_fmt
[id
] >> NF_LSH
;
358 *s
++ = nregs_fmt
[id
] & NF_FMT
;
364 void num_setfmt(int id
, char *s
)
367 if (strchr("iIaA", s
[0])) {
368 nregs_fmt
[id
] = s
[0];
370 while (isdigit(s
[i
]))
372 nregs_fmt
[id
] = '0' | (i
<< NF_LSH
);
376 static void nf_reverse(char *s
)
382 for (i
= 0; i
< l
; i
++)
386 static void nf_roman(char *s
, int n
, char *I
, char *V
)
392 *s
++ = n
% 10 == 9 ? I
[1] : V
[0];
395 for (i
= 0; i
< n
% 5; i
++)
401 nf_roman(s
, n
/ 10, I
+ 1, V
+ 1);
404 static void nf_alpha(char *s
, int n
, int a
)
407 *s
++ = a
+ ((n
- 1) % 26);
413 /* returns nonzero on failure */
414 static int num_fmt(char *s
, int n
, int fmt
)
416 int type
= fmt
& NF_FMT
;
422 if ((type
== 'i' || type
== 'I') && n
> 0 && n
< 40000) {
424 nf_roman(s
, n
, "ixcmz", "vldw");
426 nf_roman(s
, n
, "IXCMZ", "VLDW");
430 if ((type
== 'a' || type
== 'A') && n
> 0) {
431 nf_alpha(s
, n
, type
);
438 while (len
++ < fmt
>> NF_LSH
)