1 /*-
2  * Copyright 2003-2005 Colin Percival
49     off_t y;  in offtin()  local
51     y = buf[7] & 0x7F;  in offtin()
52     y = y * 256; y += buf[6];  in offtin()
53     y = y * 256; y += buf[5];  in offtin()
54     y = y * 256; y += buf[4];  in offtin()
55     y = y * 256; y += buf[3];  in offtin()
56     y = y * 256; y += buf[2];  in offtin()
57     y = y * 256; y += buf[1];  in offtin()
58     y = y * 256; y += buf[0];  in offtin()
60     if (buf[7] & 0x80) y = -y;  in offtin()
62     return y;  in offtin()
66  * -1 patching error,
71 int do_patch_rkimg(const char *img, ssize_t offset, ssize_t size,  in do_patch_rkimg()  argument
86     //   "DIFF:%-15s:%-12s:%-12s:%-32s:"  in do_patch_rkimg()
112         return -1;  in do_patch_rkimg()
114     if (lseek(fd_img, offset + size - TAIL_SIZE, SEEK_SET) < 0) {  in do_patch_rkimg()
116              offset + size - TAIL_SIZE, strerror(errno));  in do_patch_rkimg()
118         return -1;  in do_patch_rkimg()
122         ret = read(fd_img, tail + len, TAIL_SIZE - len);  in do_patch_rkimg()
126             return -1;  in do_patch_rkimg()
132     tail[TAIL_SIZE - 1] = '\0';  in do_patch_rkimg()
166         return -1;  in do_patch_rkimg()
169     //TODO: check dst_file dir size, return -1 if space too small.  in do_patch_rkimg()
174         return -1;  in do_patch_rkimg()
176     if (fseeko(f, offset, SEEK_SET)) {  in do_patch_rkimg()
179         return -1;  in do_patch_rkimg()
186         16  8   Y  in do_patch_rkimg()
189         32+X    Y   bzip2(diff block)  in do_patch_rkimg()
190         32+X+Y  ??? bzip2(extra block)  in do_patch_rkimg()
191     with control block a set of triples (x,y,z) meaning "add x bytes  in do_patch_rkimg()
192     from oldfile to x bytes from the diff block; copy y bytes from the  in do_patch_rkimg()
200         return -1;  in do_patch_rkimg()
208         return -1;  in do_patch_rkimg()
217         return -1;  in do_patch_rkimg()
220     /* re-open patch file via libbzip2 at the right places */  in do_patch_rkimg()
222         return -1;  in do_patch_rkimg()
223     if (fseeko(cpf, offset + 32, SEEK_SET)) {  in do_patch_rkimg()
224         LOGE("fseeko(%s, %lld) err\n", img, (long long)(32 + offset));  in do_patch_rkimg()
233     if (fseeko(dpf, offset + 32 + bzctrllen, SEEK_SET)) {  in do_patch_rkimg()
235              (long long)(offset + 32 + bzctrllen));  in do_patch_rkimg()
246     if (fseeko(epf, offset + 32 + bzctrllen + bzdatalen, SEEK_SET)) {  in do_patch_rkimg()
248              (long long)(offset + 32 + bzctrllen + bzdatalen));  in do_patch_rkimg()
263     fd = -1;  in do_patch_rkimg()
267         (lseek(fd, newsize - 1, SEEK_SET) != (newsize - 1)) ||  in do_patch_rkimg()
276     fd = -1;  in do_patch_rkimg()
291         /* Sanity-check */  in do_patch_rkimg()
293             LOGE("Sanity-check: Corrupt patch\n");  in do_patch_rkimg()
314         /* Sanity-check */  in do_patch_rkimg()
316             LOGE("Sanity-check: Corrupt patch\n");  in do_patch_rkimg()
347         return -1;  in do_patch_rkimg()
365     return -1;  in do_patch_rkimg()