android bsdiff,bsdiff的编译与使用

最新推荐文章于 2025-05-06 10:31:28 发布

胡文燕

最新推荐文章于 2025-05-06 10:31:28 发布

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文章标签： android bsdiff

bsdiff是一个差异包比较工具,可以用来实现增量更新.

下载地址:

编译

Mac环境

版本：macOS 10.12

1.解压下载的bsdiff-4.3.tar.gz

tar -zxvf bsdiff-4.3.tar.gz

2.进入bsdiff-4.3目录，在终端下执行构建

cd bsdiff-4.3

make

此时报错： Makefile:13: *** missing separator. Stop.

这是makefile文件的内容的格式不对，修改Makefile文件，修改后的文件内容如下：

CFLAGS += -O3 -lbz2

PREFIX?= /usr/local

INSTALL_PROGRAM?= ${INSTALL} -c -s -m 555INSTALL_MAN?= ${INSTALL} -c -m 444all: bsdiff bspatch

bsdiff: bsdiff.c

bspatch: bspatch.cinstall:

${INSTALL_PROGRAM} bsdiff bspatch ${PREFIX}/bin

.ifndef WITHOUT_MAN

${INSTALL_MAN} bsdiff.1 bspatch.1 ${PREFIX}/man/man1

.endif

即.ifndef WITHOUT_MAN，.endi语句f前面加TAB键进行缩进

然后再执行make，此时又报错：

bspatch.c:39:21: error: unknown type name 'u_char'; did you mean 'char'?static off_t offtin(u_char*buf)^~~~~~ charbspatch.c:65:8: error: expected ';'after expression

u_char header[32],buf[8];^;

bspatch.c:65:2: error: use of undeclared identifier 'u_char'; did you mean 'putchar'?u_char header[32],buf[8];^~~~~~putchar/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/stdio.h:261:6: note:'putchar'declared hereint putchar(int);^bspatch.c:65:9: error: use of undeclared identifier 'header'u_char header[32],buf[8];^bspatch.c:65:20: error: use of undeclared identifier 'buf'u_char header[32],buf[8];^bspatch.c:66:2: error: use of undeclared identifier 'u_char'; did you mean 'putchar'?u_char*old, *new;^~~~~~putchar/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/stdio.h:261:6: note:'putchar'declared hereint putchar(int);^bspatch.c:66:10: error: use of undeclared identifier 'old'u_char*old, *new;^bspatch.c:66:16: error: use of undeclared identifier 'new'u_char*old, *new;^bspatch.c:93:12: error: use of undeclared identifier 'header' if (fread(header, 1, 32, f) < 32) {^bspatch.c:100:13: error: use of undeclared identifier 'header' if (memcmp(header, "BSDIFF40", 8) != 0)^bspatch.c:104:19: error: use of undeclared identifier 'header'bzctrllen=offtin(header+8);^bspatch.c:105:19: error: use of undeclared identifier 'header'bzdatalen=offtin(header+16);^bspatch.c:106:17: error: use of undeclared identifier 'header'newsize=offtin(header+24);^bspatch.c:137:5: error: use of undeclared identifier 'old'((old=malloc(oldsize+1))==NULL) ||

^bspatch.c:139:12: error: use of undeclared identifier 'old'(read(fd,old,oldsize)!=oldsize) ||

^bspatch.c:141:6: error: use of undeclared identifier 'new' if((new=malloc(newsize+1))==NULL) err(1,NULL);^bspatch.c:147:43: error: use of undeclared identifier 'buf'lenread= BZ2_bzRead(&cbz2err, cpfbz2, buf, 8);^bspatch.c:151:19: error: use of undeclared identifier 'buf'ctrl[i]=offtin(buf);^bspatch.c:159:42: error: use of undeclared identifier 'new'lenread= BZ2_bzRead(&dbz2err, dpfbz2, new + newpos, ctrl[0]);^fatal error: too many errors emitted, stopping now [-ferror-limit=]20errors generated.make: *** [bspatch] Error 1

在bspatch.c文件中加入#include

然后再执行make命令，此时命令执行成功，会在当前目录下生成bsdiff,bspatch文件

Ubuntu

版本：15.04

在终端执行sudo apt-get install bsdiff,执行完成后可以在/usr/bin目录下找到bsdiff,bspatch文件

使用

生成差异文件，常用于服务端生成差异包

bsdiff oldfile newfile patchfile

oldfile: 旧的文件

newfile:新的文件

patchfile:生成的差异文件

合并文件，常用于客户端根据差异包合并生成新的文件