1 /* $OpenBSD: ex_print.c,v 1.13 2016/05/27 09:18:12 martijn Exp $ */
2
3 /*-
4 * Copyright (c) 1992, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 * Copyright (c) 1992, 1993, 1994, 1995, 1996
7 * Keith Bostic. All rights reserved.
8 *
9 * See the LICENSE file for redistribution information.
10 */
11
12 #include "config.h"
13
14 #include <sys/types.h>
15 #include <sys/queue.h>
16
17 #include <bitstring.h>
18 #include <ctype.h>
19 #include <limits.h>
20 #include <stdarg.h>
21 #include <stdio.h>
22 #include <string.h>
23
24 #include "../common/common.h"
25
26 static int ex_prchars(SCR *, const char *, size_t *, size_t, u_int, int);
27
28 /*
29 * ex_list -- :[line [,line]] l[ist] [count] [flags]
30 *
31 * Display the addressed lines such that the output is unambiguous.
32 *
33 * PUBLIC: int ex_list(SCR *, EXCMD *);
34 */
35 int
ex_list(SCR * sp,EXCMD * cmdp)36 ex_list(SCR *sp, EXCMD *cmdp)
37 {
38 if (ex_print(sp, cmdp,
39 &cmdp->addr1, &cmdp->addr2, cmdp->iflags | E_C_LIST))
40 return (1);
41 sp->lno = cmdp->addr2.lno;
42 sp->cno = cmdp->addr2.cno;
43 return (0);
44 }
45
46 /*
47 * ex_number -- :[line [,line]] nu[mber] [count] [flags]
48 *
49 * Display the addressed lines with a leading line number.
50 *
51 * PUBLIC: int ex_number(SCR *, EXCMD *);
52 */
53 int
ex_number(SCR * sp,EXCMD * cmdp)54 ex_number(SCR *sp, EXCMD *cmdp)
55 {
56 if (ex_print(sp, cmdp,
57 &cmdp->addr1, &cmdp->addr2, cmdp->iflags | E_C_HASH))
58 return (1);
59 sp->lno = cmdp->addr2.lno;
60 sp->cno = cmdp->addr2.cno;
61 return (0);
62 }
63
64 /*
65 * ex_pr -- :[line [,line]] p[rint] [count] [flags]
66 *
67 * Display the addressed lines.
68 *
69 * PUBLIC: int ex_pr(SCR *, EXCMD *);
70 */
71 int
ex_pr(SCR * sp,EXCMD * cmdp)72 ex_pr(SCR *sp, EXCMD *cmdp)
73 {
74 if (ex_print(sp, cmdp, &cmdp->addr1, &cmdp->addr2, cmdp->iflags))
75 return (1);
76 sp->lno = cmdp->addr2.lno;
77 sp->cno = cmdp->addr2.cno;
78 return (0);
79 }
80
81 /*
82 * ex_print --
83 * Print the selected lines.
84 *
85 * PUBLIC: int ex_print(SCR *, EXCMD *, MARK *, MARK *, u_int32_t);
86 */
87 int
ex_print(SCR * sp,EXCMD * cmdp,MARK * fp,MARK * tp,u_int32_t flags)88 ex_print(SCR *sp, EXCMD *cmdp, MARK *fp, MARK *tp, u_int32_t flags)
89 {
90 recno_t from, to;
91 size_t col, len;
92 char *p, buf[10];
93
94 NEEDFILE(sp, cmdp);
95
96 for (from = fp->lno, to = tp->lno; from <= to; ++from) {
97 col = 0;
98
99 /*
100 * Display the line number. The %6 format is specified
101 * by POSIX 1003.2, and is almost certainly large enough.
102 * Check, though, just in case.
103 */
104 if (LF_ISSET(E_C_HASH)) {
105 if (from <= 999999) {
106 snprintf(buf, sizeof(buf), "%6lu ", (ulong)from);
107 p = buf;
108 } else
109 p = "TOOBIG ";
110 if (ex_prchars(sp, p, &col, 8, 0, 0))
111 return (1);
112 }
113
114 /*
115 * Display the line. The format for E_C_PRINT isn't very good,
116 * especially in handling end-of-line tabs, but they're almost
117 * backward compatible.
118 */
119 if (db_get(sp, from, DBG_FATAL, &p, &len))
120 return (1);
121
122 if (len == 0 && !LF_ISSET(E_C_LIST))
123 (void)ex_puts(sp, "\n");
124 else if (ex_ldisplay(sp, p, len, col, flags))
125 return (1);
126
127 if (INTERRUPTED(sp))
128 break;
129 }
130 return (0);
131 }
132
133 /*
134 * ex_ldisplay --
135 * Display a line without any preceding number.
136 *
137 * PUBLIC: int ex_ldisplay(SCR *, const char *, size_t, size_t, u_int);
138 */
139 int
ex_ldisplay(SCR * sp,const char * p,size_t len,size_t col,u_int flags)140 ex_ldisplay(SCR *sp, const char *p, size_t len, size_t col, u_int flags)
141 {
142 if (len > 0 && ex_prchars(sp, p, &col, len, LF_ISSET(E_C_LIST), 0))
143 return (1);
144 if (!INTERRUPTED(sp) && LF_ISSET(E_C_LIST)) {
145 p = "$";
146 if (ex_prchars(sp, p, &col, 1, LF_ISSET(E_C_LIST), 0))
147 return (1);
148 }
149 if (!INTERRUPTED(sp))
150 (void)ex_puts(sp, "\n");
151 return (0);
152 }
153
154 /*
155 * ex_scprint --
156 * Display a line for the substitute with confirmation routine.
157 *
158 * PUBLIC: int ex_scprint(SCR *, MARK *, MARK *);
159 */
160 int
ex_scprint(SCR * sp,MARK * fp,MARK * tp)161 ex_scprint(SCR *sp, MARK *fp, MARK *tp)
162 {
163 const char *p;
164 size_t col, len;
165
166 col = 0;
167 if (O_ISSET(sp, O_NUMBER)) {
168 p = " ";
169 if (ex_prchars(sp, p, &col, 8, 0, 0))
170 return (1);
171 }
172
173 if (db_get(sp, fp->lno, DBG_FATAL, (char **)&p, &len))
174 return (1);
175
176 if (ex_prchars(sp, p, &col, fp->cno, 0, ' '))
177 return (1);
178 p += fp->cno;
179 if (ex_prchars(sp,
180 p, &col, tp->cno == fp->cno ? 1 : tp->cno - fp->cno, 0, '^'))
181 return (1);
182 if (INTERRUPTED(sp))
183 return (1);
184 p = "[ynq]";
185 if (ex_prchars(sp, p, &col, 5, 0, 0))
186 return (1);
187 (void)ex_fflush(sp);
188 return (0);
189 }
190
191 /*
192 * ex_prchars --
193 * Local routine to dump characters to the screen.
194 */
195 static int
ex_prchars(SCR * sp,const char * p,size_t * colp,size_t len,u_int flags,int repeatc)196 ex_prchars(SCR *sp, const char *p, size_t *colp, size_t len, u_int flags,
197 int repeatc)
198 {
199 CHAR_T ch, *kp;
200 size_t col, tlen, ts;
201
202 if (O_ISSET(sp, O_LIST))
203 LF_SET(E_C_LIST);
204 ts = O_VAL(sp, O_TABSTOP);
205 for (col = *colp; len--;)
206 if ((ch = *p++) == '\t' && !LF_ISSET(E_C_LIST))
207 for (tlen = ts - col % ts;
208 col < sp->cols && tlen--; ++col) {
209 (void)ex_printf(sp,
210 "%c", repeatc ? repeatc : ' ');
211 if (INTERRUPTED(sp))
212 goto intr;
213 }
214 else {
215 kp = KEY_NAME(sp, ch);
216 tlen = KEY_LEN(sp, ch);
217 if (!repeatc && col + tlen < sp->cols) {
218 (void)ex_puts(sp, kp);
219 col += tlen;
220 } else
221 for (; tlen--; ++kp, ++col) {
222 if (col == sp->cols) {
223 col = 0;
224 (void)ex_puts(sp, "\n");
225 }
226 (void)ex_printf(sp,
227 "%c", repeatc ? repeatc : *kp);
228 if (INTERRUPTED(sp))
229 goto intr;
230 }
231 }
232 intr: *colp = col;
233 return (0);
234 }
235
236 /*
237 * ex_printf --
238 * Ex's version of printf.
239 *
240 * PUBLIC: int ex_printf(SCR *, const char *, ...);
241 */
242 int
ex_printf(SCR * sp,const char * fmt,...)243 ex_printf(SCR *sp, const char *fmt, ...)
244 {
245 EX_PRIVATE *exp;
246 va_list ap;
247 size_t n;
248
249 exp = EXP(sp);
250
251 va_start(ap, fmt);
252 n = vsnprintf(exp->obp + exp->obp_len,
253 sizeof(exp->obp) - exp->obp_len, fmt, ap);
254 va_end(ap);
255 if (n >= sizeof(exp->obp) - exp->obp_len)
256 n = sizeof(exp->obp) - exp->obp_len - 1;
257 exp->obp_len += n;
258
259 /* Flush when reach a <newline> or half the buffer. */
260 if (exp->obp[exp->obp_len - 1] == '\n' ||
261 exp->obp_len > sizeof(exp->obp) / 2)
262 (void)ex_fflush(sp);
263 return (n);
264 }
265
266 /*
267 * ex_puts --
268 * Ex's version of puts.
269 *
270 * PUBLIC: int ex_puts(SCR *, const char *);
271 */
272 int
ex_puts(SCR * sp,const char * str)273 ex_puts(SCR *sp, const char *str)
274 {
275 EX_PRIVATE *exp;
276 int doflush, n;
277
278 exp = EXP(sp);
279
280 /* Flush when reach a <newline> or the end of the buffer. */
281 for (doflush = n = 0; *str != '\0'; ++n) {
282 if (exp->obp_len > sizeof(exp->obp))
283 (void)ex_fflush(sp);
284 if ((exp->obp[exp->obp_len++] = *str++) == '\n')
285 doflush = 1;
286 }
287 if (doflush)
288 (void)ex_fflush(sp);
289 return (n);
290 }
291
292 /*
293 * ex_fflush --
294 * Ex's version of fflush.
295 *
296 * PUBLIC: int ex_fflush(SCR *sp);
297 */
298 int
ex_fflush(SCR * sp)299 ex_fflush(SCR *sp)
300 {
301 EX_PRIVATE *exp;
302
303 exp = EXP(sp);
304
305 if (exp->obp_len != 0) {
306 sp->gp->scr_msg(sp, M_NONE, exp->obp, exp->obp_len);
307 exp->obp_len = 0;
308 }
309 return (0);
310 }
311