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      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 
     18 #include "jerr_hook.h"
     19 #include "jni_defines.h"
     20 
     21 /**
     22  * Replaces libjpeg's error_exit function, returns control to
     23  * the point
     24  */
     25 void ErrExit(j_common_ptr cinfo) {
     26     ErrManager* mgr = reinterpret_cast<ErrManager*>(cinfo->err);
     27     (*cinfo->err->output_message) (cinfo);
     28     // Returns control to error handling in jpeg_writer
     29     longjmp(mgr->setjmp_buf, 1);
     30 }
     31 
     32 /**
     33  * Replaces libjpeg's output_message function, writes message
     34  * to logcat's error log.
     35  */
     36 void ErrOutput(j_common_ptr cinfo) {
     37     ErrManager* mgr = reinterpret_cast<ErrManager*>(cinfo->err);
     38     char buf[JMSG_LENGTH_MAX];
     39     (*cinfo->err->format_message) (cinfo, buf);
     40     buf[JMSG_LENGTH_MAX - 1] = '\0';  // Force null terminator
     41     // Output error message in ndk logcat.
     42     LOGE("%s\n", buf);
     43 }
     44 
     45 void SetupErrMgr(j_common_ptr cinfo, ErrManager* errMgr) {
     46     jpeg_std_error(&(errMgr->mgr));
     47     errMgr->mgr.error_exit = ErrExit;
     48     errMgr->mgr.output_message = ErrOutput;
     49     cinfo->err = reinterpret_cast<struct jpeg_error_mgr*>(errMgr);
     50 }
     51 
     52 
     53