File: | src/usr.bin/vi/build/../ex/ex_join.c |
Warning: | line 43, column 2 Value stored to 'to' is never read |
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1 | /* $OpenBSD: ex_join.c,v 1.8 2016/01/06 22:28:52 millert 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 <stdio.h> |
21 | #include <stdlib.h> |
22 | #include <string.h> |
23 | |
24 | #include "../common/common.h" |
25 | |
26 | /* |
27 | * ex_join -- :[line [,line]] j[oin][!] [count] [flags] |
28 | * Join lines. |
29 | * |
30 | * PUBLIC: int ex_join(SCR *, EXCMD *); |
31 | */ |
32 | int |
33 | ex_join(SCR *sp, EXCMD *cmdp) |
34 | { |
35 | recno_t from, to; |
36 | size_t blen, clen, len, tlen; |
37 | int echar, extra, first; |
38 | char *bp, *p, *tbp; |
39 | |
40 | NEEDFILE(sp, cmdp){ if ((sp)->ep == ((void *)0)) { ex_emsg((sp), (cmdp)-> cmd->name, EXM_NOFILEYET); return (1); } }; |
41 | |
42 | from = cmdp->addr1.lno; |
43 | to = cmdp->addr2.lno; |
Value stored to 'to' is never read | |
44 | |
45 | /* Check for no lines to join. */ |
46 | if (!db_exist(sp, from + 1)) { |
47 | msgq(sp, M_ERR, "No following lines to join"); |
48 | return (1); |
49 | } |
50 | |
51 | GET_SPACE_RET(sp, bp, blen, 256){ GS *L__gp = (sp) == ((void *)0) ? ((void *)0) : (sp)->gp ; if (L__gp == ((void *)0) || (((L__gp)->flags) & ((0x0100 )))) { (bp) = ((void *)0); (blen) = 0; { void *L__bincp; if ( ((256)) > ((blen))) { if ((L__bincp = binc(((sp)), ((bp)), &((blen)), ((256)))) == ((void *)0)) return (1); ((bp)) = L__bincp; } }; } else { { void *L__bincp; if (((256)) > ( L__gp->tmp_blen)) { if ((L__bincp = binc(((sp)), (L__gp-> tmp_bp), &(L__gp->tmp_blen), ((256)))) == ((void *)0)) return (1); (L__gp->tmp_bp) = L__bincp; } }; (bp) = L__gp ->tmp_bp; (blen) = L__gp->tmp_blen; (((L__gp)->flags ) |= ((0x0100))); } }; |
52 | |
53 | /* |
54 | * The count for the join command was off-by-one, |
55 | * historically, to other counts for other commands. |
56 | */ |
57 | if (FL_ISSET(cmdp->iflags, E_C_COUNT)((cmdp->iflags) & (0x00004))) |
58 | ++cmdp->addr2.lno; |
59 | |
60 | /* |
61 | * If only a single address specified, or, the same address |
62 | * specified twice, the from/two addresses will be the same. |
63 | */ |
64 | if (cmdp->addr1.lno == cmdp->addr2.lno) |
65 | ++cmdp->addr2.lno; |
66 | |
67 | clen = tlen = 0; |
68 | for (first = 1, |
69 | from = cmdp->addr1.lno, to = cmdp->addr2.lno; from <= to; ++from) { |
70 | /* |
71 | * Get next line. Historic versions of vi allowed "10J" while |
72 | * less than 10 lines from the end-of-file, so we do too. |
73 | */ |
74 | if (db_get(sp, from, 0, &p, &len)) { |
75 | cmdp->addr2.lno = from - 1; |
76 | break; |
77 | } |
78 | |
79 | /* Empty lines just go away. */ |
80 | if (len == 0) |
81 | continue; |
82 | |
83 | /* |
84 | * Get more space if necessary. Note, tlen isn't the length |
85 | * of the new line, it's roughly the amount of space needed. |
86 | * tbp - bp is the length of the new line. |
87 | */ |
88 | tlen += len + 2; |
89 | ADD_SPACE_RET(sp, bp, blen, tlen){ GS *L__gp = (sp) == ((void *)0) ? ((void *)0) : (sp)->gp ; if (L__gp != ((void *)0) && (bp) == L__gp->tmp_bp ) { (((L__gp)->flags) &= ~((0x0100))); { void *L__bincp ; if (((tlen)) > (L__gp->tmp_blen)) { if ((L__bincp = binc (((sp)), (L__gp->tmp_bp), &(L__gp->tmp_blen), ((tlen )))) == ((void *)0)) return (1); (L__gp->tmp_bp) = L__bincp ; } }; (bp) = L__gp->tmp_bp; (blen) = L__gp->tmp_blen; ( ((L__gp)->flags) |= ((0x0100))); } else { void *L__bincp; if (((tlen)) > ((blen))) { if ((L__bincp = binc(((sp)), ((bp )), &((blen)), ((tlen)))) == ((void *)0)) return (1); ((bp )) = L__bincp; } }; }; |
90 | tbp = bp + clen; |
91 | |
92 | /* |
93 | * Historic practice: |
94 | * |
95 | * If force specified, join without modification. |
96 | * If the current line ends with whitespace, strip leading |
97 | * whitespace from the joined line. |
98 | * If the next line starts with a ), do nothing. |
99 | * If the current line ends with ., insert two spaces. |
100 | * Else, insert one space. |
101 | * |
102 | * One change -- add ? and ! to the list of characters for |
103 | * which we insert two spaces. I expect that POSIX 1003.2 |
104 | * will require this as well. |
105 | * |
106 | * Echar is the last character in the last line joined. |
107 | */ |
108 | extra = 0; |
109 | if (!first && !FL_ISSET(cmdp->iflags, E_C_FORCE)((cmdp->iflags) & (0x00100))) { |
110 | if (isblank(echar)) |
111 | for (; len && isblank(*p); --len, ++p); |
112 | else if (p[0] != ')') { |
113 | if (strchr(".?!", echar)) { |
114 | *tbp++ = ' '; |
115 | ++clen; |
116 | extra = 1; |
117 | } |
118 | *tbp++ = ' '; |
119 | ++clen; |
120 | for (; len && isblank(*p); --len, ++p); |
121 | } |
122 | } |
123 | |
124 | if (len != 0) { |
125 | memcpy(tbp, p, len); |
126 | tbp += len; |
127 | clen += len; |
128 | echar = p[len - 1]; |
129 | } else |
130 | echar = ' '; |
131 | |
132 | /* |
133 | * Historic practice for vi was to put the cursor at the first |
134 | * inserted whitespace character, if there was one, or the |
135 | * first character of the joined line, if there wasn't, or the |
136 | * last character of the line if joined to an empty line. If |
137 | * a count was specified, the cursor was moved as described |
138 | * for the first line joined, ignoring subsequent lines. If |
139 | * the join was a ':' command, the cursor was placed at the |
140 | * first non-blank character of the line unless the cursor was |
141 | * "attracted" to the end of line when the command was executed |
142 | * in which case it moved to the new end of line. There are |
143 | * probably several more special cases, but frankly, my dear, |
144 | * I don't give a damn. This implementation puts the cursor |
145 | * on the first inserted whitespace character, the first |
146 | * character of the joined line, or the last character of the |
147 | * line regardless. Note, if the cursor isn't on the joined |
148 | * line (possible with : commands), it is reset to the starting |
149 | * line. |
150 | */ |
151 | if (first) { |
152 | sp->cno = (tbp - bp) - (1 + extra); |
153 | first = 0; |
154 | } else |
155 | sp->cno = (tbp - bp) - len - (1 + extra); |
156 | } |
157 | sp->lno = cmdp->addr1.lno; |
158 | |
159 | /* Delete the joined lines. */ |
160 | for (from = cmdp->addr1.lno, to = cmdp->addr2.lno; to > from; --to) |
161 | if (db_delete(sp, to)) |
162 | goto err; |
163 | |
164 | /* If the original line changed, reset it. */ |
165 | if (!first && db_set(sp, from, bp, tbp - bp)) { |
166 | err: FREE_SPACE(sp, bp, blen){ GS *L__gp = (sp) == ((void *)0) ? ((void *)0) : (sp)->gp ; if (L__gp != ((void *)0) && (bp) == L__gp->tmp_bp ) (((L__gp)->flags) &= ~((0x0100))); else free(bp); }; |
167 | return (1); |
168 | } |
169 | FREE_SPACE(sp, bp, blen){ GS *L__gp = (sp) == ((void *)0) ? ((void *)0) : (sp)->gp ; if (L__gp != ((void *)0) && (bp) == L__gp->tmp_bp ) (((L__gp)->flags) &= ~((0x0100))); else free(bp); }; |
170 | |
171 | sp->rptlines[L_JOINED3] += (cmdp->addr2.lno - cmdp->addr1.lno) + 1; |
172 | return (0); |
173 | } |