annotate mercurial/mpatch.c @ 3392:17894d1d9eea

hgweb: fix parent/child links across renames
author Brendan Cully <brendan@kublai.com>
date Sat, 14 Oct 2006 16:03:23 -0700
parents cc856c4d91ca
children 95ffa36d1d2a 11dc22eb8e8d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
1 /*
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
2 mpatch.c - efficient binary patching for Mercurial
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
3
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
4 This implements a patch algorithm that's O(m + nlog n) where m is the
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
5 size of the output and n is the number of patches.
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
6
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
7 Given a list of binary patches, it unpacks each into a hunk list,
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
8 then combines the hunk lists with a treewise recursion to form a
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
9 single hunk list. This hunk list is then applied to the original
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
10 text.
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
11
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
12 The text (or binary) fragments are copied directly from their source
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
13 Python objects into a preallocated output string to avoid the
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
14 allocation of intermediate Python objects. Working memory is about 2x
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
15 the total number of hunks.
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
16
2859
345bac2bc4ec update copyrights.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2543
diff changeset
17 Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
18
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
19 This software may be used and distributed according to the terms
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
20 of the GNU General Public License, incorporated herein by reference.
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
21 */
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
22
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
23 #include <Python.h>
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
24 #include <stdlib.h>
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
25 #include <string.h>
2468
1ac0574f1768 mac os x: fixes for 10.2 from chris monson <monpublic@gmail.com>
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2083
diff changeset
26
410
7c678976df3e Make mpatch.c compilable under the other `OS'
mpm@selenic.com
parents: 384
diff changeset
27 #ifdef _WIN32
2468
1ac0574f1768 mac os x: fixes for 10.2 from chris monson <monpublic@gmail.com>
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2083
diff changeset
28 # ifdef _MSC_VER
1ac0574f1768 mac os x: fixes for 10.2 from chris monson <monpublic@gmail.com>
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2083
diff changeset
29 /* msvc 6.0 has problems */
1ac0574f1768 mac os x: fixes for 10.2 from chris monson <monpublic@gmail.com>
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2083
diff changeset
30 # define inline __inline
551
b460a2fd8bb7 [PATCH] bdiff/mpatch under MSVC
mpm@selenic.com
parents: 510
diff changeset
31 typedef unsigned long uint32_t;
2468
1ac0574f1768 mac os x: fixes for 10.2 from chris monson <monpublic@gmail.com>
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2083
diff changeset
32 # else
1ac0574f1768 mac os x: fixes for 10.2 from chris monson <monpublic@gmail.com>
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2083
diff changeset
33 # include <stdint.h>
1ac0574f1768 mac os x: fixes for 10.2 from chris monson <monpublic@gmail.com>
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2083
diff changeset
34 # endif
411
9e9f7ab43ce2 Add 'other OS' bits to bdiff.c / style cleanups
mpm@selenic.com
parents: 410
diff changeset
35 static uint32_t ntohl(uint32_t x)
9e9f7ab43ce2 Add 'other OS' bits to bdiff.c / style cleanups
mpm@selenic.com
parents: 410
diff changeset
36 {
9e9f7ab43ce2 Add 'other OS' bits to bdiff.c / style cleanups
mpm@selenic.com
parents: 410
diff changeset
37 return ((x & 0x000000ffUL) << 24) |
9e9f7ab43ce2 Add 'other OS' bits to bdiff.c / style cleanups
mpm@selenic.com
parents: 410
diff changeset
38 ((x & 0x0000ff00UL) << 8) |
9e9f7ab43ce2 Add 'other OS' bits to bdiff.c / style cleanups
mpm@selenic.com
parents: 410
diff changeset
39 ((x & 0x00ff0000UL) >> 8) |
9e9f7ab43ce2 Add 'other OS' bits to bdiff.c / style cleanups
mpm@selenic.com
parents: 410
diff changeset
40 ((x & 0xff000000UL) >> 24);
410
7c678976df3e Make mpatch.c compilable under the other `OS'
mpm@selenic.com
parents: 384
diff changeset
41 }
7c678976df3e Make mpatch.c compilable under the other `OS'
mpm@selenic.com
parents: 384
diff changeset
42 #else
2468
1ac0574f1768 mac os x: fixes for 10.2 from chris monson <monpublic@gmail.com>
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2083
diff changeset
43 /* not windows */
1ac0574f1768 mac os x: fixes for 10.2 from chris monson <monpublic@gmail.com>
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2083
diff changeset
44 # include <sys/types.h>
1ac0574f1768 mac os x: fixes for 10.2 from chris monson <monpublic@gmail.com>
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2083
diff changeset
45 # include <arpa/inet.h>
2543
860e9c83fc59 Include inttypes.h instead of stdint.h (fixes issue299)
Thomas Arendsen Hein <thomas@intevation.de>
parents: 2468
diff changeset
46 # include <inttypes.h>
410
7c678976df3e Make mpatch.c compilable under the other `OS'
mpm@selenic.com
parents: 384
diff changeset
47 #endif
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
48
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
49 static char mpatch_doc[] = "Efficient binary patching.";
1722
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
50 static PyObject *mpatch_Error;
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
51
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
52 struct frag {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
53 int start, end, len;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
54 char *data;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
55 };
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
56
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
57 struct flist {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
58 struct frag *base, *head, *tail;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
59 };
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
60
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
61 static struct flist *lalloc(int size)
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
62 {
128
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
63 struct flist *a = NULL;
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
64
3138
cc856c4d91ca mpatch: Fix for malloc corner case on AIX
Matt Mackall <mpm@selenic.com>
parents: 2859
diff changeset
65 if (size < 1)
cc856c4d91ca mpatch: Fix for malloc corner case on AIX
Matt Mackall <mpm@selenic.com>
parents: 2859
diff changeset
66 size = 1;
cc856c4d91ca mpatch: Fix for malloc corner case on AIX
Matt Mackall <mpm@selenic.com>
parents: 2859
diff changeset
67
1978
10606ee61107 do proper typecasting on malloc() and calloc() calls
TK Soh <teekaysoh@yahoo.com>
parents: 1746
diff changeset
68 a = (struct flist *)malloc(sizeof(struct flist));
128
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
69 if (a) {
1978
10606ee61107 do proper typecasting on malloc() and calloc() calls
TK Soh <teekaysoh@yahoo.com>
parents: 1746
diff changeset
70 a->base = (struct frag *)malloc(sizeof(struct frag) * size);
2048
8f9660c568b8 Set correct exception for another possible malloc error in mpatch.c
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1978
diff changeset
71 if (a->base) {
128
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
72 a->head = a->tail = a->base;
2048
8f9660c568b8 Set correct exception for another possible malloc error in mpatch.c
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1978
diff changeset
73 return a;
8f9660c568b8 Set correct exception for another possible malloc error in mpatch.c
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1978
diff changeset
74 }
8f9660c568b8 Set correct exception for another possible malloc error in mpatch.c
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1978
diff changeset
75 free(a);
8f9660c568b8 Set correct exception for another possible malloc error in mpatch.c
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1978
diff changeset
76 a = NULL;
128
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
77 }
1722
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
78 if (!PyErr_Occurred())
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
79 PyErr_NoMemory();
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
80 return NULL;
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
81 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
82
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
83 static void lfree(struct flist *a)
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
84 {
128
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
85 if (a) {
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
86 free(a->base);
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
87 free(a);
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
88 }
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
89 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
90
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
91 static int lsize(struct flist *a)
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
92 {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
93 return a->tail - a->head;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
94 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
95
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
96 /* move hunks in source that are less cut to dest, compensating
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
97 for changes in offset. the last hunk may be split if necessary.
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
98 */
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
99 static int gather(struct flist *dest, struct flist *src, int cut, int offset)
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
100 {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
101 struct frag *d = dest->tail, *s = src->head;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
102 int postend, c, l;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
103
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
104 while (s != src->tail) {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
105 if (s->start + offset >= cut)
82
7ed96baa7caa Gotos are embarrassing.
mpm@selenic.com
parents: 72
diff changeset
106 break; /* we've gone far enough */
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
107
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
108 postend = offset + s->start + s->len;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
109 if (postend <= cut) {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
110 /* save this hunk */
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
111 offset += s->start + s->len - s->end;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
112 *d++ = *s++;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
113 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
114 else {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
115 /* break up this hunk */
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
116 c = cut - offset;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
117 if (s->end < c)
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
118 c = s->end;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
119 l = cut - offset - s->start;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
120 if (s->len < l)
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
121 l = s->len;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
122
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
123 offset += s->start + l - c;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
124
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
125 d->start = s->start;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
126 d->end = c;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
127 d->len = l;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
128 d->data = s->data;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
129 d++;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
130 s->start = c;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
131 s->len = s->len - l;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
132 s->data = s->data + l;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
133
82
7ed96baa7caa Gotos are embarrassing.
mpm@selenic.com
parents: 72
diff changeset
134 break;
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
135 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
136 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
137
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
138 dest->tail = d;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
139 src->head = s;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
140 return offset;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
141 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
142
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
143 /* like gather, but with no output list */
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
144 static int discard(struct flist *src, int cut, int offset)
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
145 {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
146 struct frag *s = src->head;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
147 int postend, c, l;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
148
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
149 while (s != src->tail) {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
150 if (s->start + offset >= cut)
82
7ed96baa7caa Gotos are embarrassing.
mpm@selenic.com
parents: 72
diff changeset
151 break;
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
152
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
153 postend = offset + s->start + s->len;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
154 if (postend <= cut) {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
155 offset += s->start + s->len - s->end;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
156 s++;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
157 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
158 else {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
159 c = cut - offset;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
160 if (s->end < c)
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
161 c = s->end;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
162 l = cut - offset - s->start;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
163 if (s->len < l)
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
164 l = s->len;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
165
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
166 offset += s->start + l - c;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
167 s->start = c;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
168 s->len = s->len - l;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
169 s->data = s->data + l;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
170
82
7ed96baa7caa Gotos are embarrassing.
mpm@selenic.com
parents: 72
diff changeset
171 break;
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
172 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
173 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
174
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
175 src->head = s;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
176 return offset;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
177 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
178
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
179 /* combine hunk lists a and b, while adjusting b for offset changes in a/
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
180 this deletes a and b and returns the resultant list. */
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
181 static struct flist *combine(struct flist *a, struct flist *b)
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
182 {
128
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
183 struct flist *c = NULL;
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
184 struct frag *bh, *ct;
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
185 int offset = 0, post;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
186
128
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
187 if (a && b)
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
188 c = lalloc((lsize(a) + lsize(b)) * 2);
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
189
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
190 if (c) {
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
191
128
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
192 for (bh = b->head; bh != b->tail; bh++) {
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
193 /* save old hunks */
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
194 offset = gather(c, a, bh->start, offset);
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
195
128
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
196 /* discard replaced hunks */
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
197 post = discard(a, bh->end, offset);
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
198
128
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
199 /* insert new hunk */
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
200 ct = c->tail;
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
201 ct->start = bh->start - offset;
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
202 ct->end = bh->end - post;
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
203 ct->len = bh->len;
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
204 ct->data = bh->data;
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
205 c->tail++;
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
206 offset = post;
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
207 }
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
208
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
209 /* hold on to tail from a */
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
210 memcpy(c->tail, a->head, sizeof(struct frag) * lsize(a));
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
211 c->tail += lsize(a);
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
212 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
213
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
214 lfree(a);
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
215 lfree(b);
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
216 return c;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
217 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
218
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
219 /* decode a binary patch into a hunk list */
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
220 static struct flist *decode(char *bin, int len)
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
221 {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
222 struct flist *l;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
223 struct frag *lt;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
224 char *end = bin + len;
384
a29decbf7475 mpatch: attempt to handle unpack alignment issues on Solaris
mpm@selenic.com
parents: 282
diff changeset
225 char decode[12]; /* for dealing with alignment issues */
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
226
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
227 /* assume worst case size, we won't have many of these lists */
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
228 l = lalloc(len / 12);
1722
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
229 if (!l)
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
230 return NULL;
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
231
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
232 lt = l->tail;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
233
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
234 while (bin < end) {
384
a29decbf7475 mpatch: attempt to handle unpack alignment issues on Solaris
mpm@selenic.com
parents: 282
diff changeset
235 memcpy(decode, bin, 12);
a29decbf7475 mpatch: attempt to handle unpack alignment issues on Solaris
mpm@selenic.com
parents: 282
diff changeset
236 lt->start = ntohl(*(uint32_t *)decode);
a29decbf7475 mpatch: attempt to handle unpack alignment issues on Solaris
mpm@selenic.com
parents: 282
diff changeset
237 lt->end = ntohl(*(uint32_t *)(decode + 4));
a29decbf7475 mpatch: attempt to handle unpack alignment issues on Solaris
mpm@selenic.com
parents: 282
diff changeset
238 lt->len = ntohl(*(uint32_t *)(decode + 8));
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
239 lt->data = bin + 12;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
240 bin += 12 + lt->len;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
241 lt++;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
242 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
243
1722
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
244 if (bin != end) {
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
245 if (!PyErr_Occurred())
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
246 PyErr_SetString(mpatch_Error, "patch cannot be decoded");
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
247 lfree(l);
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
248 return NULL;
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
249 }
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
250
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
251 l->tail = lt;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
252 return l;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
253 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
254
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
255 /* calculate the size of resultant text */
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
256 static int calcsize(int len, struct flist *l)
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
257 {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
258 int outlen = 0, last = 0;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
259 struct frag *f = l->head;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
260
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
261 while (f != l->tail) {
1722
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
262 if (f->start < last || f->end > len) {
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
263 if (!PyErr_Occurred())
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
264 PyErr_SetString(mpatch_Error,
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
265 "invalid patch");
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
266 return -1;
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
267 }
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
268 outlen += f->start - last;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
269 last = f->end;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
270 outlen += f->len;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
271 f++;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
272 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
273
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
274 outlen += len - last;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
275 return outlen;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
276 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
277
1722
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
278 static int apply(char *buf, char *orig, int len, struct flist *l)
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
279 {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
280 struct frag *f = l->head;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
281 int last = 0;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
282 char *p = buf;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
283
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
284 while (f != l->tail) {
1722
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
285 if (f->start < last || f->end > len) {
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
286 if (!PyErr_Occurred())
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
287 PyErr_SetString(mpatch_Error,
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
288 "invalid patch");
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
289 return 0;
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
290 }
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
291 memcpy(p, orig + last, f->start - last);
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
292 p += f->start - last;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
293 memcpy(p, f->data, f->len);
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
294 last = f->end;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
295 p += f->len;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
296 f++;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
297 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
298 memcpy(p, orig + last, len - last);
1722
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
299 return 1;
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
300 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
301
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
302 /* recursively generate a patch of all bins between start and end */
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
303 static struct flist *fold(PyObject *bins, int start, int end)
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
304 {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
305 int len;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
306
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
307 if (start + 1 == end) {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
308 /* trivial case, output a decoded list */
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
309 PyObject *tmp = PyList_GetItem(bins, start);
128
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
310 if (!tmp)
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
311 return NULL;
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
312 return decode(PyString_AsString(tmp), PyString_Size(tmp));
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
313 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
314
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
315 /* divide and conquer, memory management is elsewhere */
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
316 len = (end - start) / 2;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
317 return combine(fold(bins, start, start + len),
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
318 fold(bins, start + len, end));
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
319 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
320
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
321 static PyObject *
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
322 patches(PyObject *self, PyObject *args)
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
323 {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
324 PyObject *text, *bins, *result;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
325 struct flist *patch;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
326 char *in, *out;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
327 int len, outlen;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
328
128
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
329 if (!PyArg_ParseTuple(args, "SO:mpatch", &text, &bins))
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
330 return NULL;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
331
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
332 len = PyList_Size(bins);
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
333 if (!len) {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
334 /* nothing to do */
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
335 Py_INCREF(text);
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
336 return text;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
337 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
338
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
339 patch = fold(bins, 0, len);
128
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
340 if (!patch)
1722
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
341 return NULL;
128
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
342
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
343 outlen = calcsize(PyString_Size(text), patch);
1722
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
344 if (outlen < 0) {
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
345 result = NULL;
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
346 goto cleanup;
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
347 }
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
348 result = PyString_FromStringAndSize(NULL, outlen);
1722
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
349 if (!result) {
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
350 result = NULL;
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
351 goto cleanup;
128
d6afb6dbf9f2 Add safety checking to mpatch
mpm@selenic.com
parents: 82
diff changeset
352 }
1722
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
353 in = PyString_AsString(text);
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
354 out = PyString_AsString(result);
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
355 if (!apply(out, in, PyString_Size(text), patch)) {
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
356 Py_DECREF(result);
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
357 result = NULL;
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
358 }
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
359 cleanup:
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
360 lfree(patch);
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
361 return result;
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
362 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
363
2078
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
364 /* calculate size of a patched file directly */
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
365 static PyObject *
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
366 patchedsize(PyObject *self, PyObject *args)
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
367 {
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
368 long orig, start, end, len, outlen = 0, last = 0;
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
369 int patchlen;
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
370 char *bin, *binend;
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
371 char decode[12]; /* for dealing with alignment issues */
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
372
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
373 if (!PyArg_ParseTuple(args, "ls#", &orig, &bin, &patchlen))
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
374 return NULL;
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
375
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
376 binend = bin + patchlen;
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
377
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
378 while (bin < binend) {
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
379 memcpy(decode, bin, 12);
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
380 start = ntohl(*(uint32_t *)decode);
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
381 end = ntohl(*(uint32_t *)(decode + 4));
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
382 len = ntohl(*(uint32_t *)(decode + 8));
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
383 bin += 12 + len;
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
384 outlen += start - last;
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
385 last = end;
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
386 outlen += len;
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
387 }
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
388
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
389 if (bin != binend) {
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
390 if (!PyErr_Occurred())
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
391 PyErr_SetString(mpatch_Error, "patch cannot be decoded");
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
392 return NULL;
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
393 }
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
394
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
395 outlen += orig - last;
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
396 return Py_BuildValue("l", outlen);
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
397 }
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
398
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
399 static PyMethodDef methods[] = {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
400 {"patches", patches, METH_VARARGS, "apply a series of patches\n"},
2078
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1978
diff changeset
401 {"patchedsize", patchedsize, METH_VARARGS, "calculed patched size\n"},
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
402 {NULL, NULL}
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
403 };
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
404
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
405 PyMODINIT_FUNC
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
406 initmpatch(void)
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
407 {
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
408 Py_InitModule3("mpatch", methods, mpatch_doc);
1722
681c5c211b92 catch errors and throw exception with invalid binary patch data
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 597
diff changeset
409 mpatch_Error = PyErr_NewException("mpatch.mpatchError", NULL, NULL);
72
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
410 }
4a6ab4d80dc4 Add an O(m + nlog n) patching extension
mpm@selenic.com
parents:
diff changeset
411