annotate mercurial/cext/bdiff.c @ 35741:73432eee0ac4

fileset: add kind:pat operator ":" isn't taken as a symbol character but an infix operator so we can write e.g. "path:'foo bar'" as well as "'path:foo bar'". An invalid pattern kind is rejected in the former form as we know a kind is specified explicitly. The binding strength is copied from "x:y" range operator of revset. Perhaps it can be adjusted later if we want to parse "foo:bar()" as "(foo:bar)()", not "foo:(bar())". We can also add "kind:" postfix operator if we want. One possible confusion is that the scope of the leading "set:" vs "kind:pat" operator. The former is consumed by a matcher so applies to the whole fileset expression: $ hg files 'set:foo() or kind:bar or baz' ^^^^^^^^^^^^^^^^^^^^^^^^ Whereas the scope of kind:pat operator is narrow: $ hg files 'set:foo() or kind:bar or baz' ^^^
author Yuya Nishihara <yuya@tcha.org>
date Sun, 14 Jan 2018 13:29:15 +0900
parents b90e8da190da
children b4fdc6177b29
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
29541
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
1 /*
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
2 bdiff.c - efficient binary diff extension for Mercurial
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
3
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
4 Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
5
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
6 This software may be used and distributed according to the terms of
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
7 the GNU General Public License, incorporated herein by reference.
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
8
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
9 Based roughly on Python difflib
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
10 */
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
11
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
12 #define PY_SSIZE_T_CLEAN
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
13 #include <Python.h>
34438
b90e8da190da cext: reorder #include
Gregory Szorc <gregory.szorc@gmail.com>
parents: 32369
diff changeset
14 #include <limits.h>
29541
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
15 #include <stdlib.h>
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
16 #include <string.h>
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
17
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
18 #include "bdiff.h"
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
19 #include "bitmanipulation.h"
30170
15635d8b17e0 bdiff: include util.h
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29541
diff changeset
20 #include "util.h"
29541
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
21
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
22
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
23 static PyObject *blocks(PyObject *self, PyObject *args)
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
24 {
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
25 PyObject *sa, *sb, *rl = NULL, *m;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
26 struct bdiff_line *a, *b;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
27 struct bdiff_hunk l, *h;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
28 int an, bn, count, pos = 0;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
29
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
30 l.next = NULL;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
31
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
32 if (!PyArg_ParseTuple(args, "SS:bdiff", &sa, &sb))
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
33 return NULL;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
34
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
35 an = bdiff_splitlines(PyBytes_AsString(sa), PyBytes_Size(sa), &a);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
36 bn = bdiff_splitlines(PyBytes_AsString(sb), PyBytes_Size(sb), &b);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
37
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
38 if (!a || !b)
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
39 goto nomem;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
40
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
41 count = bdiff_diff(a, an, b, bn, &l);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
42 if (count < 0)
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
43 goto nomem;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
44
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
45 rl = PyList_New(count);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
46 if (!rl)
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
47 goto nomem;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
48
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
49 for (h = l.next; h; h = h->next) {
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
50 m = Py_BuildValue("iiii", h->a1, h->a2, h->b1, h->b2);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
51 PyList_SetItem(rl, pos, m);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
52 pos++;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
53 }
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
54
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
55 nomem:
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
56 free(a);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
57 free(b);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
58 bdiff_freehunks(l.next);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
59 return rl ? rl : PyErr_NoMemory();
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
60 }
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
61
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
62 static PyObject *bdiff(PyObject *self, PyObject *args)
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
63 {
30561
7c0c722d568d bdiff: early pruning of common prefix before doing expensive computations
Mads Kiilerich <madski@unity3d.com>
parents: 30170
diff changeset
64 char *sa, *sb, *rb, *ia, *ib;
29541
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
65 PyObject *result = NULL;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
66 struct bdiff_line *al, *bl;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
67 struct bdiff_hunk l, *h;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
68 int an, bn, count;
30561
7c0c722d568d bdiff: early pruning of common prefix before doing expensive computations
Mads Kiilerich <madski@unity3d.com>
parents: 30170
diff changeset
69 Py_ssize_t len = 0, la, lb, li = 0, lcommon = 0, lmax;
29541
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
70 PyThreadState *_save;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
71
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
72 l.next = NULL;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
73
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
74 if (!PyArg_ParseTuple(args, "s#s#:bdiff", &sa, &la, &sb, &lb))
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
75 return NULL;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
76
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
77 if (la > UINT_MAX || lb > UINT_MAX) {
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
78 PyErr_SetString(PyExc_ValueError, "bdiff inputs too large");
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
79 return NULL;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
80 }
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
81
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
82 _save = PyEval_SaveThread();
30561
7c0c722d568d bdiff: early pruning of common prefix before doing expensive computations
Mads Kiilerich <madski@unity3d.com>
parents: 30170
diff changeset
83
7c0c722d568d bdiff: early pruning of common prefix before doing expensive computations
Mads Kiilerich <madski@unity3d.com>
parents: 30170
diff changeset
84 lmax = la > lb ? lb : la;
7c0c722d568d bdiff: early pruning of common prefix before doing expensive computations
Mads Kiilerich <madski@unity3d.com>
parents: 30170
diff changeset
85 for (ia = sa, ib = sb;
7c0c722d568d bdiff: early pruning of common prefix before doing expensive computations
Mads Kiilerich <madski@unity3d.com>
parents: 30170
diff changeset
86 li < lmax && *ia == *ib;
7c0c722d568d bdiff: early pruning of common prefix before doing expensive computations
Mads Kiilerich <madski@unity3d.com>
parents: 30170
diff changeset
87 ++li, ++ia, ++ib)
7c0c722d568d bdiff: early pruning of common prefix before doing expensive computations
Mads Kiilerich <madski@unity3d.com>
parents: 30170
diff changeset
88 if (*ia == '\n')
7c0c722d568d bdiff: early pruning of common prefix before doing expensive computations
Mads Kiilerich <madski@unity3d.com>
parents: 30170
diff changeset
89 lcommon = li + 1;
7c0c722d568d bdiff: early pruning of common prefix before doing expensive computations
Mads Kiilerich <madski@unity3d.com>
parents: 30170
diff changeset
90 /* we can almost add: if (li == lmax) lcommon = li; */
7c0c722d568d bdiff: early pruning of common prefix before doing expensive computations
Mads Kiilerich <madski@unity3d.com>
parents: 30170
diff changeset
91
7c0c722d568d bdiff: early pruning of common prefix before doing expensive computations
Mads Kiilerich <madski@unity3d.com>
parents: 30170
diff changeset
92 an = bdiff_splitlines(sa + lcommon, la - lcommon, &al);
7c0c722d568d bdiff: early pruning of common prefix before doing expensive computations
Mads Kiilerich <madski@unity3d.com>
parents: 30170
diff changeset
93 bn = bdiff_splitlines(sb + lcommon, lb - lcommon, &bl);
29541
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
94 if (!al || !bl)
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
95 goto nomem;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
96
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
97 count = bdiff_diff(al, an, bl, bn, &l);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
98 if (count < 0)
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
99 goto nomem;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
100
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
101 /* calculate length of output */
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
102 la = lb = 0;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
103 for (h = l.next; h; h = h->next) {
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
104 if (h->a1 != la || h->b1 != lb)
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
105 len += 12 + bl[h->b1].l - bl[lb].l;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
106 la = h->a2;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
107 lb = h->b2;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
108 }
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
109 PyEval_RestoreThread(_save);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
110 _save = NULL;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
111
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
112 result = PyBytes_FromStringAndSize(NULL, len);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
113
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
114 if (!result)
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
115 goto nomem;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
116
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
117 /* build binary patch */
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
118 rb = PyBytes_AsString(result);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
119 la = lb = 0;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
120
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
121 for (h = l.next; h; h = h->next) {
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
122 if (h->a1 != la || h->b1 != lb) {
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
123 len = bl[h->b1].l - bl[lb].l;
30561
7c0c722d568d bdiff: early pruning of common prefix before doing expensive computations
Mads Kiilerich <madski@unity3d.com>
parents: 30170
diff changeset
124 putbe32((uint32_t)(al[la].l + lcommon - al->l), rb);
7c0c722d568d bdiff: early pruning of common prefix before doing expensive computations
Mads Kiilerich <madski@unity3d.com>
parents: 30170
diff changeset
125 putbe32((uint32_t)(al[h->a1].l + lcommon - al->l), rb + 4);
29541
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
126 putbe32((uint32_t)len, rb + 8);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
127 memcpy(rb + 12, bl[lb].l, len);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
128 rb += 12 + len;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
129 }
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
130 la = h->a2;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
131 lb = h->b2;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
132 }
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
133
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
134 nomem:
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
135 if (_save)
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
136 PyEval_RestoreThread(_save);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
137 free(al);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
138 free(bl);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
139 bdiff_freehunks(l.next);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
140 return result ? result : PyErr_NoMemory();
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
141 }
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
142
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
143 /*
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
144 * If allws != 0, remove all whitespace (' ', \t and \r). Otherwise,
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
145 * reduce whitespace sequences to a single space and trim remaining whitespace
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
146 * from end of lines.
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
147 */
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
148 static PyObject *fixws(PyObject *self, PyObject *args)
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
149 {
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
150 PyObject *s, *result = NULL;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
151 char allws, c;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
152 const char *r;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
153 Py_ssize_t i, rlen, wlen = 0;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
154 char *w;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
155
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
156 if (!PyArg_ParseTuple(args, "Sb:fixws", &s, &allws))
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
157 return NULL;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
158 r = PyBytes_AsString(s);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
159 rlen = PyBytes_Size(s);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
160
31467
08ecec297521 bdiff: use Python memory allocator in fixws
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30561
diff changeset
161 w = (char *)PyMem_Malloc(rlen ? rlen : 1);
29541
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
162 if (!w)
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
163 goto nomem;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
164
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
165 for (i = 0; i != rlen; i++) {
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
166 c = r[i];
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
167 if (c == ' ' || c == '\t' || c == '\r') {
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
168 if (!allws && (wlen == 0 || w[wlen - 1] != ' '))
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
169 w[wlen++] = ' ';
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
170 } else if (c == '\n' && !allws
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
171 && wlen > 0 && w[wlen - 1] == ' ') {
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
172 w[wlen - 1] = '\n';
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
173 } else {
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
174 w[wlen++] = c;
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
175 }
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
176 }
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
177
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
178 result = PyBytes_FromStringAndSize(w, wlen);
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
179
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
180 nomem:
31467
08ecec297521 bdiff: use Python memory allocator in fixws
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30561
diff changeset
181 PyMem_Free(w);
29541
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
182 return result ? result : PyErr_NoMemory();
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
183 }
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
184
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
185
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
186 static char mdiff_doc[] = "Efficient binary diff.";
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
187
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
188 static PyMethodDef methods[] = {
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
189 {"bdiff", bdiff, METH_VARARGS, "calculate a binary diff\n"},
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
190 {"blocks", blocks, METH_VARARGS, "find a list of matching lines\n"},
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
191 {"fixws", fixws, METH_VARARGS, "normalize diff whitespaces\n"},
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
192 {NULL, NULL}
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
193 };
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
194
32355
4195b84940e9 bdiff: add version to help detect breaking binary changes
Jun Wu <quark@fb.com>
parents: 31467
diff changeset
195 static const int version = 1;
4195b84940e9 bdiff: add version to help detect breaking binary changes
Jun Wu <quark@fb.com>
parents: 31467
diff changeset
196
29541
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
197 #ifdef IS_PY3K
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
198 static struct PyModuleDef bdiff_module = {
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
199 PyModuleDef_HEAD_INIT,
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
200 "bdiff",
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
201 mdiff_doc,
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
202 -1,
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
203 methods
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
204 };
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
205
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
206 PyMODINIT_FUNC PyInit_bdiff(void)
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
207 {
32355
4195b84940e9 bdiff: add version to help detect breaking binary changes
Jun Wu <quark@fb.com>
parents: 31467
diff changeset
208 PyObject *m;
4195b84940e9 bdiff: add version to help detect breaking binary changes
Jun Wu <quark@fb.com>
parents: 31467
diff changeset
209 m = PyModule_Create(&bdiff_module);
4195b84940e9 bdiff: add version to help detect breaking binary changes
Jun Wu <quark@fb.com>
parents: 31467
diff changeset
210 PyModule_AddIntConstant(m, "version", version);
4195b84940e9 bdiff: add version to help detect breaking binary changes
Jun Wu <quark@fb.com>
parents: 31467
diff changeset
211 return m;
29541
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
212 }
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
213 #else
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
214 PyMODINIT_FUNC initbdiff(void)
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
215 {
32355
4195b84940e9 bdiff: add version to help detect breaking binary changes
Jun Wu <quark@fb.com>
parents: 31467
diff changeset
216 PyObject *m;
4195b84940e9 bdiff: add version to help detect breaking binary changes
Jun Wu <quark@fb.com>
parents: 31467
diff changeset
217 m = Py_InitModule3("bdiff", methods, mdiff_doc);
4195b84940e9 bdiff: add version to help detect breaking binary changes
Jun Wu <quark@fb.com>
parents: 31467
diff changeset
218 PyModule_AddIntConstant(m, "version", version);
29541
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
219 }
9631ff5ebbeb bdiff: split bdiff into cpy-aware and cpy-agnostic part
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
220 #endif