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3c369cdd WJ |
1 | /* Output routines for ed-script format. |
2 | Copyright (C) 1988, 1989 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GNU DIFF. | |
5 | ||
6 | GNU DIFF is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 1, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU DIFF is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU DIFF; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | #include "diff.h" | |
21 | ||
22 | static void print_rcs_hunk (); | |
23 | static void print_ed_hunk (); | |
24 | static void pr_forward_ed_hunk (); | |
25 | void translate_range (); | |
26 | struct change *find_change (); | |
27 | struct change *find_reverse_change (); | |
28 | \f | |
29 | /* Print our script as ed commands. */ | |
30 | ||
31 | void | |
32 | print_ed_script (script) | |
33 | struct change *script; | |
34 | { | |
35 | print_script (script, find_reverse_change, print_ed_hunk); | |
36 | } | |
37 | ||
38 | /* Print a hunk of an ed diff */ | |
39 | ||
40 | static void | |
41 | print_ed_hunk (hunk) | |
42 | struct change *hunk; | |
43 | { | |
44 | int f0, l0, f1, l1; | |
45 | int deletes, inserts; | |
46 | ||
47 | #if 0 | |
48 | hunk = flip_script (hunk); | |
49 | #endif | |
50 | #ifdef DEBUG | |
51 | debug_script (hunk); | |
52 | #endif | |
53 | ||
54 | /* Determine range of line numbers involved in each file. */ | |
55 | analyze_hunk (hunk, &f0, &l0, &f1, &l1, &deletes, &inserts); | |
56 | if (!deletes && !inserts) | |
57 | return; | |
58 | ||
59 | /* Print out the line number header for this hunk */ | |
60 | print_number_range (',', &files[0], f0, l0); | |
61 | fprintf (outfile, "%c\n", change_letter (inserts, deletes)); | |
62 | ||
63 | /* Print new/changed lines from second file, if needed */ | |
64 | if (inserts) | |
65 | { | |
66 | int i; | |
67 | int inserting = 1; | |
68 | for (i = f1; i <= l1; i++) | |
69 | { | |
70 | /* Resume the insert, if we stopped. */ | |
71 | if (! inserting) | |
72 | fprintf (outfile, "%da\n", | |
73 | i - f1 + translate_line_number (&files[0], f0) - 1); | |
74 | inserting = 1; | |
75 | ||
76 | /* If the file's line is just a dot, it would confuse `ed'. | |
77 | So output it with a double dot, and set the flag LEADING_DOT | |
78 | so that we will output another ed-command later | |
79 | to change the double dot into a single dot. */ | |
80 | ||
81 | if (files[1].linbuf[i].text[0] == '.' | |
82 | && files[1].linbuf[i].text[1] == '\n') | |
83 | { | |
84 | fprintf (outfile, "..\n"); | |
85 | fprintf (outfile, ".\n"); | |
86 | /* Now change that double dot to the desired single dot. */ | |
87 | fprintf (outfile, "%ds/^\\.\\././\n", | |
88 | i - f1 + translate_line_number (&files[0], f0)); | |
89 | inserting = 0; | |
90 | } | |
91 | else | |
92 | /* Line is not `.', so output it unmodified. */ | |
93 | print_1_line ("", &files[1].linbuf[i]); | |
94 | } | |
95 | ||
96 | /* End insert mode, if we are still in it. */ | |
97 | if (inserting) | |
98 | fprintf (outfile, ".\n"); | |
99 | } | |
100 | } | |
101 | \f | |
102 | /* Print change script in the style of ed commands, | |
103 | but print the changes in the order they appear in the input files, | |
104 | which means that the commands are not truly useful with ed. */ | |
105 | ||
106 | void | |
107 | pr_forward_ed_script (script) | |
108 | struct change *script; | |
109 | { | |
110 | print_script (script, find_change, pr_forward_ed_hunk); | |
111 | } | |
112 | ||
113 | static void | |
114 | pr_forward_ed_hunk (hunk) | |
115 | struct change *hunk; | |
116 | { | |
117 | int i; | |
118 | int f0, l0, f1, l1; | |
119 | int deletes, inserts; | |
120 | ||
121 | /* Determine range of line numbers involved in each file. */ | |
122 | analyze_hunk (hunk, &f0, &l0, &f1, &l1, &deletes, &inserts); | |
123 | if (!deletes && !inserts) | |
124 | return; | |
125 | ||
126 | fprintf (outfile, "%c", change_letter (inserts, deletes)); | |
127 | print_number_range (' ', files, f0, l0); | |
128 | fprintf (outfile, "\n"); | |
129 | ||
130 | /* If deletion only, print just the number range. */ | |
131 | ||
132 | if (!inserts) | |
133 | return; | |
134 | ||
135 | /* For insertion (with or without deletion), print the number range | |
136 | and the lines from file 2. */ | |
137 | ||
138 | for (i = f1; i <= l1; i++) | |
139 | print_1_line ("", &files[1].linbuf[i]); | |
140 | ||
141 | fprintf (outfile, ".\n"); | |
142 | } | |
143 | \f | |
144 | /* Print in a format somewhat like ed commands | |
145 | except that each insert command states the number of lines it inserts. | |
146 | This format is used for RCS. */ | |
147 | ||
148 | void | |
149 | print_rcs_script (script) | |
150 | struct change *script; | |
151 | { | |
152 | print_script (script, find_change, print_rcs_hunk); | |
153 | } | |
154 | ||
155 | /* Print a hunk of an RCS diff */ | |
156 | ||
157 | static void | |
158 | print_rcs_hunk (hunk) | |
159 | struct change *hunk; | |
160 | { | |
161 | int i; | |
162 | int f0, l0, f1, l1; | |
163 | int deletes, inserts; | |
164 | int tf0, tl0, tf1, tl1; | |
165 | ||
166 | /* Determine range of line numbers involved in each file. */ | |
167 | analyze_hunk (hunk, &f0, &l0, &f1, &l1, &deletes, &inserts); | |
168 | if (!deletes && !inserts) | |
169 | return; | |
170 | ||
171 | translate_range (&files[0], f0, l0, &tf0, &tl0); | |
172 | ||
173 | if (deletes) | |
174 | { | |
175 | fprintf (outfile, "d"); | |
176 | /* For deletion, print just the starting line number from file 0 | |
177 | and the number of lines deleted. */ | |
178 | fprintf (outfile, "%d %d\n", | |
179 | tf0, | |
180 | (tl0 >= tf0 ? tl0 - tf0 + 1 : 1)); | |
181 | } | |
182 | ||
183 | if (inserts) | |
184 | { | |
185 | fprintf (outfile, "a"); | |
186 | ||
187 | /* Take last-line-number from file 0 and # lines from file 1. */ | |
188 | translate_range (&files[1], f1, l1, &tf1, &tl1); | |
189 | fprintf (outfile, "%d %d\n", | |
190 | tl0, | |
191 | (tl1 >= tf1 ? tl1 - tf1 + 1 : 1)); | |
192 | ||
193 | /* Print the inserted lines. */ | |
194 | for (i = f1; i <= l1; i++) | |
195 | print_1_line ("", &files[1].linbuf[i]); | |
196 | } | |
197 | } |