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 struct wb wb
; /* per environment partial word */
18 char tc
[GNLEN
]; /* tab character (.tc) */
19 char lc
[GNLEN
]; /* leader character (.lc) */
20 char hc
[GNLEN
]; /* hyphenation character (.hc) */
21 char mc
[GNLEN
]; /* margin character (.mc) */
24 static int nregs
[NREGS
]; /* global number registers */
25 static int nregs_inc
[NREGS
]; /* number register auto-increment size */
26 static int nregs_fmt
[NREGS
]; /* number register format */
27 static char *sregs
[NREGS
]; /* global string registers */
28 static void *sregs_dat
[NREGS
]; /* builtin function data */
29 static struct env
*envs
[NREGS
];/* environments */
30 static struct env
*env
; /* current enviroment */
31 static int env_id
; /* current environment id */
32 static int eregs_idx
[NREGS
]; /* register environment index in eregs[] */
34 static char *eregs
[] = { /* environment-specific number registers */
35 "ln", ".f", ".i", ".j", ".l",
36 ".L", ".nI", ".nm", ".nM", ".nn",
37 ".nS", ".m", ".s", ".u", ".v",
38 ".it", ".itn", ".mc", ".mcn",
39 ".ce", ".f0", ".hy", ".hyp", ".i0", ".l0",
40 ".L0", ".m0", ".n0", ".s0", ".ss", ".ssh", ".sss",
41 ".ti", ".lt", ".lt0", ".v0",
44 /* return the address of a number register */
48 return &env
->eregs
[eregs_idx
[id
]];
52 static int num_fmt(char *s
, int n
, int fmt
);
54 /* the contents of a number register (returns a static buffer) */
57 static char numbuf
[128];
58 char *s
= map_name(id
);
60 if (s
[0] == '.' && !s
[2]) {
63 sprintf(numbuf
, "%d", dev_getbd(n_f
));
66 sprintf(numbuf
, "%d", in_lnum());
69 sprintf(numbuf
, "%d", f_hpos());
72 sprintf(numbuf
, "#%02x%02x%02x",
73 CLR_R(n_m
), CLR_G(n_m
), CLR_B(n_m
));
76 sprintf(numbuf
, "%d", f_nexttrap());
80 sprintf(numbuf
, "%s", map_name(f_divreg()));
83 sprintf(numbuf
, "%s", in_filename());
86 sprintf(numbuf
, "%d", in_nargs());
90 if (s
[0] == '.' && !strcmp(".neat", s
))
92 if (id
== map("yr")) {
93 sprintf(numbuf
, "%02d", nregs
[id
]);
96 if (!nregs_fmt
[id
] || num_fmt(numbuf
, *nreg(id
), nregs_fmt
[id
]))
97 sprintf(numbuf
, "%d", *nreg(id
));
101 void num_set(int id
, int val
)
106 void num_inc(int id
, int val
)
118 int num_get(int id
, int inc
)
121 *nreg(id
) += inc
> 0 ? nregs_inc
[id
] : -nregs_inc
[id
];
125 void str_set(int id
, char *s
)
127 int len
= strlen(s
) + 1;
130 sregs
[id
] = xmalloc(len
);
131 memcpy(sregs
[id
], s
, len
);
132 sregs_dat
[id
] = NULL
;
135 char *str_get(int id
)
140 void *str_dget(int id
)
142 return sregs_dat
[id
];
145 void str_dset(int id
, void *d
)
155 sregs_dat
[id
] = NULL
;
158 void str_rn(int src
, int dst
)
161 sregs
[dst
] = sregs
[src
];
162 sregs_dat
[dst
] = sregs_dat
[src
];
164 sregs_dat
[src
] = NULL
;
167 static struct env
*env_alloc(void)
169 struct env
*env
= xmalloc(sizeof(*env
));
170 memset(env
, 0, sizeof(*env
));
172 env
->fmt
= fmt_alloc();
176 static void env_free(struct env
*env
)
183 static void env_set(int id
)
189 envs
[id
] = env_alloc();
194 n_l
= SC_IN
* 65 / 10;
202 n_lt
= SC_IN
* 65 / 10;
208 strcpy(env
->hc
, "\\%");
209 strcpy(env
->lc
, ".");
210 for (i
= 0; i
< NTABS
; i
++)
211 env
->tabs
[i
] = i
* SC_IN
/ 2;
215 static void init_time(void)
217 time_t t
= time(NULL
);
218 struct tm
*tm
= localtime(&t
);
219 nregs
[map("dw")] = tm
->tm_wday
+ 1;
220 nregs
[map("dy")] = tm
->tm_mday
;
221 nregs
[map("mo")] = tm
->tm_mon
+ 1;
222 nregs
[map("yr")] = tm
->tm_year
% 100;
225 static void init_globals(void)
238 for (i
= 0; i
< LEN(eregs
); i
++)
239 eregs_idx
[map(eregs
[i
])] = i
+ 1;
246 for (i
= 0; i
< LEN(envs
); i
++)
251 static int oenv
[NPREV
]; /* environment stack */
254 void tr_ev(char **args
)
260 id
= nenv
? oenv
[--nenv
] : -1;
263 if (args
[1] && env
&& nenv
< NPREV
)
264 oenv
[nenv
++] = env_id
;
268 struct fmt
*env_fmt(void)
273 struct wb
*env_wb(void)
298 /* saving and restoring registers around diverted lines */
300 int f
, s
, m
, f0
, s0
, m0
;
303 static struct odiv odivs
[NPREV
]; /* state before diverted text */
306 /* begin outputting diverted line */
309 struct odiv
*o
= &odivs
[nodivs
++];
318 /* end outputting diverted line */
321 struct odiv
*o
= &odivs
[--nodivs
];
330 void tr_ta(char **args
)
334 for (i
= 0; i
< NARGS
&& args
[i
]; i
++) {
335 env
->tabs
[i
] = eval_re(args
[i
], i
> 0 ? env
->tabs
[i
- 1] : 0, 'm');
336 s
= args
[i
][0] ? strchr(args
[i
], '\0') - 1 : "";
337 env
->tabs_type
[i
] = strchr("LRC", *s
) ? *s
: 'L';
341 static int tab_idx(int pos
)
344 for (i
= 0; i
< LEN(env
->tabs
); i
++)
345 if (env
->tabs
[i
] > pos
)
350 int tab_next(int pos
)
352 int i
= tab_idx(pos
);
353 return i
>= 0 ? env
->tabs
[i
] : pos
;
356 int tab_type(int pos
)
358 int i
= tab_idx(pos
);
359 return i
>= 0 && env
->tabs_type
[i
] ? env
->tabs_type
[i
] : 'L';
362 /* number register format (.af) */
363 #define NF_LSH 8 /* number format length shifts */
364 #define NF_FMT 0x00ff /* number format mask */
366 /* the format of a number register (returns a static buffer) */
367 char *num_getfmt(int id
)
369 static char fmtbuf
[128];
372 if (!nregs_fmt
[id
] || (nregs_fmt
[id
] & NF_FMT
) == '0') {
374 i
= nregs_fmt
[id
] >> NF_LSH
;
378 *s
++ = nregs_fmt
[id
] & NF_FMT
;
384 void num_setfmt(int id
, char *s
)
387 if (strchr("iIaA", s
[0])) {
388 nregs_fmt
[id
] = s
[0];
390 while (isdigit(s
[i
]))
392 nregs_fmt
[id
] = '0' | (i
<< NF_LSH
);
396 static void nf_reverse(char *s
)
402 for (i
= 0; i
< l
; i
++)
406 static void nf_roman(char *s
, int n
, char *I
, char *V
)
412 *s
++ = n
% 10 == 9 ? I
[1] : V
[0];
415 for (i
= 0; i
< n
% 5; i
++)
421 nf_roman(s
, n
/ 10, I
+ 1, V
+ 1);
424 static void nf_alpha(char *s
, int n
, int a
)
427 *s
++ = a
+ ((n
- 1) % 26);
433 /* returns nonzero on failure */
434 static int num_fmt(char *s
, int n
, int fmt
)
436 int type
= fmt
& NF_FMT
;
442 if ((type
== 'i' || type
== 'I') && n
> 0 && n
< 40000) {
444 nf_roman(s
, n
, "ixcmz", "vldw");
446 nf_roman(s
, n
, "IXCMZ", "VLDW");
450 if ((type
== 'a' || type
== 'A') && n
> 0) {
451 nf_alpha(s
, n
, type
);
458 while (len
++ < fmt
>> NF_LSH
)