1 /* registers and environments */
10 #define NENVS 64 /* number of environment registers */
13 int eregs
[NENVS
]; /* environment-specific number registers */
14 int tabs
[NTABS
]; /* tab stops */
15 char tabs_type
[NTABS
]; /* type of tabs: L, C, R */
16 struct adj
*adj
; /* per environment line buffer */
17 char tc
[GNLEN
]; /* tab character (.tc) */
18 char lc
[GNLEN
]; /* leader character (.lc) */
19 char hc
[GNLEN
]; /* hyphenation character (.hc) */
20 char mc
[GNLEN
]; /* margin character (.mc) */
23 static int nregs
[NREGS
]; /* global number registers */
24 static int nregs_inc
[NREGS
]; /* number register auto-increment size */
25 static int nregs_fmt
[NREGS
]; /* number register format */
26 static char *sregs
[NREGS
]; /* global string registers */
27 static void *sregs_dat
[NREGS
]; /* builtin function data */
28 static struct env
*envs
[NREGS
];/* environments */
29 static struct env
*env
; /* current enviroment */
30 static int env_id
; /* current environment id */
31 static int eregs_idx
[NREGS
]; /* register environment index in eregs[] */
33 static char *eregs
[] = { /* environment-specific number registers */
34 "ln", ".f", ".i", ".j", ".l",
35 ".L", ".nI", ".nm", ".nM", ".nn",
36 ".nS", ".m", ".s", ".u", ".v",
37 ".it", ".itn", ".mc", ".mcn",
38 ".ce", ".f0", ".hy", ".i0", ".l0",
39 ".L0", ".m0", ".n0", ".s0", ".ss",
43 /* return the address of a number register */
47 return &env
->eregs
[eregs_idx
[id
]];
51 static int num_fmt(char *s
, int n
, int fmt
);
53 /* the contents of a number register (returns a static buffer) */
56 static char numbuf
[128];
57 char *s
= map_name(id
);
59 if (s
[0] == '.' && !s
[2]) {
62 sprintf(numbuf
, "%d", dev_getbd(n_f
));
65 sprintf(numbuf
, "%d", in_lnum());
68 sprintf(numbuf
, "%d", f_hpos());
71 sprintf(numbuf
, "#%02x%02x%02x", CLR_R(n_m
), CLR_G(n_m
), CLR_B(n_m
));
74 sprintf(numbuf
, "%d", f_nexttrap());
78 sprintf(numbuf
, "%s", map_name(f_divreg()));
81 sprintf(numbuf
, "%s", in_filename());
84 sprintf(numbuf
, "%d", in_nargs());
88 if (id
== map("yr")) {
89 sprintf(numbuf
, "%02d", nregs
[id
]);
92 if (!nregs_fmt
[id
] || num_fmt(numbuf
, *nreg(id
), nregs_fmt
[id
]))
93 sprintf(numbuf
, "%d", *nreg(id
));
97 void num_set(int id
, int val
)
102 void num_inc(int id
, int val
)
114 int num_get(int id
, int inc
)
117 *nreg(id
) += inc
> 0 ? nregs_inc
[id
] : -nregs_inc
[id
];
121 void str_set(int id
, char *s
)
123 int len
= strlen(s
) + 1;
126 sregs
[id
] = malloc(len
);
127 memcpy(sregs
[id
], s
, len
);
128 sregs_dat
[id
] = NULL
;
131 char *str_get(int id
)
136 void *str_dget(int id
)
138 return sregs_dat
[id
];
141 void str_dset(int id
, void *d
)
151 sregs_dat
[id
] = NULL
;
154 void str_rn(int src
, int dst
)
157 sregs
[dst
] = sregs
[src
];
158 sregs_dat
[dst
] = sregs_dat
[src
];
160 sregs_dat
[src
] = NULL
;
163 static struct env
*env_alloc(void)
165 struct env
*env
= malloc(sizeof(*env
));
166 memset(env
, 0, sizeof(*env
));
167 env
->adj
= adj_alloc();
171 static void env_free(struct env
*env
)
177 static void env_set(int id
)
183 envs
[id
] = env_alloc();
188 n_l
= SC_IN
* 65 / 10;
196 n_lt
= SC_IN
* 65 / 10;
201 strcpy(env
->hc
, "\\%");
202 strcpy(env
->lc
, ".");
203 adj_ll(env
->adj
, n_l
);
204 adj_in(env
->adj
, n_i
);
205 for (i
= 0; i
< NTABS
; i
++)
206 env
->tabs
[i
] = i
* SC_IN
/ 2;
210 static void init_time(void)
212 time_t t
= time(NULL
);
213 struct tm
*tm
= localtime(&t
);
214 nregs
[map("dw")] = tm
->tm_wday
+ 1;
215 nregs
[map("dy")] = tm
->tm_mday
;
216 nregs
[map("mo")] = tm
->tm_mon
+ 1;
217 nregs
[map("yr")] = tm
->tm_year
% 100;
220 static void init_globals(void)
233 for (i
= 0; i
< LEN(eregs
); i
++)
234 eregs_idx
[map(eregs
[i
])] = i
+ 1;
241 for (i
= 0; i
< LEN(envs
); i
++)
246 static int oenv
[NPREV
]; /* environment stack */
249 void tr_ev(char **args
)
255 id
= nenv
? oenv
[--nenv
] : -1;
258 if (args
[1] && env
&& nenv
< NPREV
)
259 oenv
[nenv
++] = env_id
;
263 struct adj
*env_adj(void)
288 /* saving and restoring registers around diverted lines */
290 int f
, s
, m
, f0
, s0
, m0
;
293 static struct odiv odivs
[NPREV
]; /* state before diverted text */
296 /* begin outputting diverted line */
299 struct odiv
*o
= &odivs
[nodivs
++];
308 /* end outputting diverted line */
311 struct odiv
*o
= &odivs
[--nodivs
];
320 void tr_ta(char **args
)
324 for (i
= 0; i
< NARGS
&& args
[i
]; i
++) {
325 env
->tabs
[i
] = eval_re(args
[i
], i
> 0 ? env
->tabs
[i
- 1] : 0, 'm');
326 s
= args
[i
][0] ? strchr(args
[i
], '\0') - 1 : "";
327 env
->tabs_type
[i
] = strchr("LRC", *s
) ? *s
: 'L';
331 static int tab_idx(int pos
)
334 for (i
= 0; i
< LEN(env
->tabs
); i
++)
335 if (env
->tabs
[i
] > pos
)
340 int tab_next(int pos
)
342 int i
= tab_idx(pos
);
343 return i
>= 0 ? env
->tabs
[i
] : pos
;
346 int tab_type(int pos
)
348 int i
= tab_idx(pos
);
349 return i
>= 0 && env
->tabs_type
[i
] ? env
->tabs_type
[i
] : 'L';
352 /* number register format (.af) */
353 #define NF_LSH 8 /* number format length shifts */
354 #define NF_FMT 0x00ff /* number format mask */
356 /* the format of a number register (returns a static buffer) */
357 char *num_getfmt(int id
)
359 static char fmtbuf
[128];
362 if (!nregs_fmt
[id
] || (nregs_fmt
[id
] & NF_FMT
) == '0') {
364 i
= nregs_fmt
[id
] >> NF_LSH
;
368 *s
++ = nregs_fmt
[id
] & NF_FMT
;
374 void num_setfmt(int id
, char *s
)
377 if (strchr("iIaA", s
[0])) {
378 nregs_fmt
[id
] = s
[0];
380 while (isdigit(s
[i
]))
382 nregs_fmt
[id
] = '0' | (i
<< NF_LSH
);
386 static void nf_reverse(char *s
)
392 for (i
= 0; i
< l
; i
++)
396 static void nf_roman(char *s
, int n
, char *I
, char *V
)
402 *s
++ = n
% 10 == 9 ? I
[1] : V
[0];
405 for (i
= 0; i
< n
% 5; i
++)
411 nf_roman(s
, n
/ 10, I
+ 1, V
+ 1);
414 static void nf_alpha(char *s
, int n
, int a
)
417 *s
++ = a
+ ((n
- 1) % 26);
423 /* returns nonzero on failure */
424 static int num_fmt(char *s
, int n
, int fmt
)
426 int type
= fmt
& NF_FMT
;
432 if ((type
== 'i' || type
== 'I') && n
> 0 && n
< 40000) {
434 nf_roman(s
, n
, "ixcmz", "vldw");
436 nf_roman(s
, n
, "IXCMZ", "VLDW");
440 if ((type
== 'a' || type
== 'A') && n
> 0) {
441 nf_alpha(s
, n
, type
);
448 while (len
++ < fmt
>> NF_LSH
)