src/java.base/share/native/libzip/CRC32.c
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src/java.base/share/native/libzip/CRC32.c

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  26 /*
  27  * Native method support for java.util.zip.CRC32
  28  */
  29 
  30 #include "jni.h"
  31 #include "jni_util.h"
  32 #include <zlib.h>
  33 
  34 #include "java_util_zip_CRC32.h"
  35 
  36 JNIEXPORT jint JNICALL
  37 Java_java_util_zip_CRC32_update(JNIEnv *env, jclass cls, jint crc, jint b)
  38 {
  39     Bytef buf[1];
  40 
  41     buf[0] = (Bytef)b;
  42     return crc32(crc, buf, 1);
  43 }
  44 
  45 JNIEXPORT jint JNICALL
  46 Java_java_util_zip_CRC32_updateBytes(JNIEnv *env, jclass cls, jint crc,
  47                                      jarray b, jint off, jint len)
  48 {
  49     Bytef *buf = (*env)->GetPrimitiveArrayCritical(env, b, 0);
  50     if (buf) {
  51         crc = crc32(crc, buf + off, len);
  52         (*env)->ReleasePrimitiveArrayCritical(env, b, buf, 0);
  53     }
  54     return crc;
  55 }
  56 
  57 JNIEXPORT jint JNICALL
  58 ZIP_CRC32(jint crc, const jbyte *buf, jint len)
  59 {
  60     return crc32(crc, (Bytef*)buf, len);
  61 }
  62 
  63 JNIEXPORT jint JNICALL
  64 Java_java_util_zip_CRC32_updateByteBuffer(JNIEnv *env, jclass cls, jint crc,
  65                                           jlong address, jint off, jint len)
  66 {
  67     Bytef *buf = (Bytef *)jlong_to_ptr(address);
  68     if (buf) {
  69         crc = crc32(crc, buf + off, len);
  70     }
  71     return crc;
  72 }


  26 /*
  27  * Native method support for java.util.zip.CRC32
  28  */
  29 
  30 #include "jni.h"
  31 #include "jni_util.h"
  32 #include <zlib.h>
  33 
  34 #include "java_util_zip_CRC32.h"
  35 
  36 JNIEXPORT jint JNICALL
  37 Java_java_util_zip_CRC32_update(JNIEnv *env, jclass cls, jint crc, jint b)
  38 {
  39     Bytef buf[1];
  40 
  41     buf[0] = (Bytef)b;
  42     return crc32(crc, buf, 1);
  43 }
  44 
  45 JNIEXPORT jint JNICALL
  46 Java_java_util_zip_CRC32_updateBytes0(JNIEnv *env, jclass cls, jint crc,
  47                                          jarray b, jint off, jint len)
  48 {
  49     Bytef *buf = (*env)->GetPrimitiveArrayCritical(env, b, 0);
  50     if (buf) {
  51         crc = crc32(crc, buf + off, len);
  52         (*env)->ReleasePrimitiveArrayCritical(env, b, buf, 0);
  53     }
  54     return crc;
  55 }
  56 
  57 JNIEXPORT jint JNICALL
  58 ZIP_CRC32(jint crc, const jbyte *buf, jint len)
  59 {
  60     return crc32(crc, (Bytef*)buf, len);
  61 }
  62 
  63 JNIEXPORT jint JNICALL
  64 Java_java_util_zip_CRC32_updateByteBuffer0(JNIEnv *env, jclass cls, jint crc,
  65                                               jlong address, jint off, jint len)
  66 {
  67     Bytef *buf = (Bytef *)jlong_to_ptr(address);
  68     if (buf) {
  69         crc = crc32(crc, buf + off, len);
  70     }
  71     return crc;
  72 }
src/java.base/share/native/libzip/CRC32.c
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