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 fmt
*fmt
; /* per environment line formatting 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",
40 ".ti", ".lt", ".lt0", ".v0",
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",
72 CLR_R(n_m
), CLR_G(n_m
), CLR_B(n_m
));
75 sprintf(numbuf
, "%d", f_nexttrap());
79 sprintf(numbuf
, "%s", map_name(f_divreg()));
82 sprintf(numbuf
, "%s", in_filename());
85 sprintf(numbuf
, "%d", in_nargs());
89 if (s
[0] == '.' && !strcmp(".neat", s
))
91 if (id
== map("yr")) {
92 sprintf(numbuf
, "%02d", nregs
[id
]);
95 if (!nregs_fmt
[id
] || num_fmt(numbuf
, *nreg(id
), nregs_fmt
[id
]))
96 sprintf(numbuf
, "%d", *nreg(id
));
100 void num_set(int id
, int val
)
105 void num_inc(int id
, int val
)
117 int num_get(int id
, int inc
)
120 *nreg(id
) += inc
> 0 ? nregs_inc
[id
] : -nregs_inc
[id
];
124 void str_set(int id
, char *s
)
126 int len
= strlen(s
) + 1;
129 sregs
[id
] = malloc(len
);
130 memcpy(sregs
[id
], s
, len
);
131 sregs_dat
[id
] = NULL
;
134 char *str_get(int id
)
139 void *str_dget(int id
)
141 return sregs_dat
[id
];
144 void str_dset(int id
, void *d
)
154 sregs_dat
[id
] = NULL
;
157 void str_rn(int src
, int dst
)
160 sregs
[dst
] = sregs
[src
];
161 sregs_dat
[dst
] = sregs_dat
[src
];
163 sregs_dat
[src
] = NULL
;
166 static struct env
*env_alloc(void)
168 struct env
*env
= malloc(sizeof(*env
));
169 memset(env
, 0, sizeof(*env
));
170 env
->fmt
= fmt_alloc();
174 static void env_free(struct env
*env
)
180 static void env_set(int id
)
186 envs
[id
] = env_alloc();
191 n_l
= SC_IN
* 65 / 10;
199 n_lt
= SC_IN
* 65 / 10;
204 strcpy(env
->hc
, "\\%");
205 strcpy(env
->lc
, ".");
206 for (i
= 0; i
< NTABS
; i
++)
207 env
->tabs
[i
] = i
* SC_IN
/ 2;
211 static void init_time(void)
213 time_t t
= time(NULL
);
214 struct tm
*tm
= localtime(&t
);
215 nregs
[map("dw")] = tm
->tm_wday
+ 1;
216 nregs
[map("dy")] = tm
->tm_mday
;
217 nregs
[map("mo")] = tm
->tm_mon
+ 1;
218 nregs
[map("yr")] = tm
->tm_year
% 100;
221 static void init_globals(void)
234 for (i
= 0; i
< LEN(eregs
); i
++)
235 eregs_idx
[map(eregs
[i
])] = i
+ 1;
242 for (i
= 0; i
< LEN(envs
); i
++)
247 static int oenv
[NPREV
]; /* environment stack */
250 void tr_ev(char **args
)
256 id
= nenv
? oenv
[--nenv
] : -1;
259 if (args
[1] && env
&& nenv
< NPREV
)
260 oenv
[nenv
++] = env_id
;
264 struct fmt
*env_fmt(void)
289 /* saving and restoring registers around diverted lines */
291 int f
, s
, m
, f0
, s0
, m0
;
294 static struct odiv odivs
[NPREV
]; /* state before diverted text */
297 /* begin outputting diverted line */
300 struct odiv
*o
= &odivs
[nodivs
++];
309 /* end outputting diverted line */
312 struct odiv
*o
= &odivs
[--nodivs
];
321 void tr_ta(char **args
)
325 for (i
= 0; i
< NARGS
&& args
[i
]; i
++) {
326 env
->tabs
[i
] = eval_re(args
[i
], i
> 0 ? env
->tabs
[i
- 1] : 0, 'm');
327 s
= args
[i
][0] ? strchr(args
[i
], '\0') - 1 : "";
328 env
->tabs_type
[i
] = strchr("LRC", *s
) ? *s
: 'L';
332 static int tab_idx(int pos
)
335 for (i
= 0; i
< LEN(env
->tabs
); i
++)
336 if (env
->tabs
[i
] > pos
)
341 int tab_next(int pos
)
343 int i
= tab_idx(pos
);
344 return i
>= 0 ? env
->tabs
[i
] : pos
;
347 int tab_type(int pos
)
349 int i
= tab_idx(pos
);
350 return i
>= 0 && env
->tabs_type
[i
] ? env
->tabs_type
[i
] : 'L';
353 /* number register format (.af) */
354 #define NF_LSH 8 /* number format length shifts */
355 #define NF_FMT 0x00ff /* number format mask */
357 /* the format of a number register (returns a static buffer) */
358 char *num_getfmt(int id
)
360 static char fmtbuf
[128];
363 if (!nregs_fmt
[id
] || (nregs_fmt
[id
] & NF_FMT
) == '0') {
365 i
= nregs_fmt
[id
] >> NF_LSH
;
369 *s
++ = nregs_fmt
[id
] & NF_FMT
;
375 void num_setfmt(int id
, char *s
)
378 if (strchr("iIaA", s
[0])) {
379 nregs_fmt
[id
] = s
[0];
381 while (isdigit(s
[i
]))
383 nregs_fmt
[id
] = '0' | (i
<< NF_LSH
);
387 static void nf_reverse(char *s
)
393 for (i
= 0; i
< l
; i
++)
397 static void nf_roman(char *s
, int n
, char *I
, char *V
)
403 *s
++ = n
% 10 == 9 ? I
[1] : V
[0];
406 for (i
= 0; i
< n
% 5; i
++)
412 nf_roman(s
, n
/ 10, I
+ 1, V
+ 1);
415 static void nf_alpha(char *s
, int n
, int a
)
418 *s
++ = a
+ ((n
- 1) % 26);
424 /* returns nonzero on failure */
425 static int num_fmt(char *s
, int n
, int fmt
)
427 int type
= fmt
& NF_FMT
;
433 if ((type
== 'i' || type
== 'I') && n
> 0 && n
< 40000) {
435 nf_roman(s
, n
, "ixcmz", "vldw");
437 nf_roman(s
, n
, "IXCMZ", "VLDW");
441 if ((type
== 'a' || type
== 'A') && n
> 0) {
442 nf_alpha(s
, n
, type
);
449 while (len
++ < fmt
>> NF_LSH
)