Mercurial > cgi-bin > hgweb.cgi > JpegWasher

annotate src/name/blackcap/exifwasher/exiv2/native.cpp @ 1:42277ce58ace

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Improve exception handling; always use absolute paths on libs.
author David Barts <n5jrn@me.com>
date Tue, 31 Mar 2020 15:38:25 -0700
parents db63d01a23c6
children efd9fe2d70d7
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1 #include <jni.h>
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2 #include <exiv2/exiv2.hpp>
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3 #include <iostream>
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4 #include <iomanip>
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5 #include <cassert>
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6
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7 /* Functions for class name_blackcap_exifwasher_exiv2_Image */
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8
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9 #ifndef _Included_name_blackcap_exifwasher_exiv2_Image
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10 #define _Included_name_blackcap_exifwasher_exiv2_Image
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11 #ifdef __cplusplus
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12 extern "C" {
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13 #endif
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14
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15 /*
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16 * Utility function to get pointer field.
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17 */
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18 jlong getPointer(JNIEnv *jEnv, jobject jThis) {
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19 return jEnv->GetLongField(jThis, jEnv->GetFieldID(jEnv->GetObjectClass(jThis), "pointer", "J"));
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20 }
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21
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22 /*
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23 * Class: name_blackcap_exifwasher_exiv2_Image
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24 * Method: _ctor
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25 * Signature: (Ljava/lang/String;)J
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26 */
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27 JNIEXPORT jlong JNICALL Java_name_blackcap_exifwasher_exiv2_Image__1ctor
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28 (JNIEnv *jEnv, jobject jThis, jstring path) {
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29 const char *cPath = jEnv->GetStringUTFChars(path, NULL);
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30 jlong ret = 0;
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31 try {
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32 ret = reinterpret_cast<jlong> (Exiv2::ImageFactory::open(cPath).release());
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33 } catch (...) {
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34 jEnv->ExceptionClear();
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35 jclass ex = jEnv->FindClass("name/blackcap/exifwasher/exiv2/Exiv2Exception");
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36 const char *pfx = "unable to open ";
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37 char *message = (char *) malloc(strlen(cPath) + strlen(pfx) + 1);
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38 strcpy(message, pfx);
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39 strcat(message, cPath);
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40 jEnv->ThrowNew(ex, message);
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41 free(message);
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42 }
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43 jEnv->ReleaseStringUTFChars(path, cPath);
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44 return ret;
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45 }
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46
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47 /*
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48 * Class: name_blackcap_exifwasher_exiv2_Image
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49 * Method: _writeMetadata
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50 * Signature: ()V
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51 */
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52 JNIEXPORT void JNICALL Java_name_blackcap_exifwasher_exiv2_Image__1writeMetadata
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53 (JNIEnv *jEnv, jobject jThis) {
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54 Exiv2::Image *image = reinterpret_cast<Exiv2::Image *> (getPointer(jEnv, jThis));
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55 if (jEnv->ExceptionCheck()) return;
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56 try {
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57 image->writeMetadata();
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58 } catch (...) {
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59 jEnv->ExceptionClear();
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60 jclass ex = jEnv->FindClass("name/blackcap/exifwasher/exiv2/Exiv2Exception");
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61 jEnv->ThrowNew(ex, "unable to write metadata");
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62 }
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63 }
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64
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65 /*
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66 * Class: name_blackcap_exifwasher_exiv2_Image
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67 * Method: _getMetadata
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68 * Signature: ()J
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69 */
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70 JNIEXPORT jlong JNICALL Java_name_blackcap_exifwasher_exiv2_Image__1getMetadata
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71 (JNIEnv *jEnv, jobject jThis) {
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72 Exiv2::Image *image = reinterpret_cast<Exiv2::Image *> (getPointer(jEnv, jThis));
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73 if (jEnv->ExceptionCheck()) return 0;
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74 try {
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75 image->readMetadata();
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76 } catch (...) {
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77 jEnv->ExceptionClear();
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78 jclass ex = jEnv->FindClass("name/blackcap/exifwasher/exiv2/Exiv2Exception");
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79 jEnv->ThrowNew(ex, "unable to read metadata");
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80 return 0;
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81 }
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82 return reinterpret_cast<jlong> (&(image->exifData()));
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83 }
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84
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85 /*
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86 * Class: name_blackcap_exifwasher_exiv2_Image
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87 * Method: _dtor
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88 * Signature: ()V
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89 */
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90 JNIEXPORT void JNICALL Java_name_blackcap_exifwasher_exiv2_Image__1dtor
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91 (JNIEnv *jEnv, jobject jThis) {
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92 Exiv2::Image *image = reinterpret_cast<Exiv2::Image *> (getPointer(jEnv, jThis));
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93 if (jEnv->ExceptionCheck()) return;
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94 delete image;
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95 }
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96
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97 #ifdef __cplusplus
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98 }
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99 #endif
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100 #endif
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101 /* Header for class name_blackcap_exifwasher_exiv2_ExifData */
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102
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103 #ifndef _Included_name_blackcap_exifwasher_exiv2_ExifData
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104 #define _Included_name_blackcap_exifwasher_exiv2_ExifData
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105 #ifdef __cplusplus
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106 extern "C" {
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107 #endif
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108 /*
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109 * Class: name_blackcap_exifwasher_exiv2_ExifData
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110 * Method: _erase
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111 * Signature: (Ljava/lang/String;)V
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112 */
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113 JNIEXPORT void JNICALL Java_name_blackcap_exifwasher_exiv2_ExifData__1erase
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114 (JNIEnv *jEnv, jobject jThis, jstring key) {
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115 Exiv2::ExifData *data = reinterpret_cast<Exiv2::ExifData *> (getPointer(jEnv, jThis));
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116 if (jEnv->ExceptionCheck()) return;
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117 const char *cKey = jEnv->GetStringUTFChars(key, NULL);
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118 Exiv2::ExifData::iterator found = data->findKey(Exiv2::ExifKey(std::string(cKey)));
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119 try {
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120 data->erase(found);
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121 } catch (...) {
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122 jEnv->ExceptionClear();
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123 jclass ex = jEnv->FindClass("name/blackcap/exifwasher/exiv2/Exiv2Exception");
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124 const char *pfx = "unable to delete ";
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125 char *message = (char *) malloc(strlen(cKey) + strlen(pfx) + 1);
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126 strcpy(message, pfx);
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127 strcat(message, cKey);
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128 jEnv->ThrowNew(ex, message);
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129 free(message);
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130 }
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131 jEnv->ReleaseStringUTFChars(key, cKey);
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132 }
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133
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134 /*
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135 * Class: name_blackcap_exifwasher_exiv2_ExifData
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136 * Method: _value
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137 * Signature: (Ljava/lang/String;)Lname/blackcap/exifwasher/exiv2/ExifData/Value;
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138 */
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139 JNIEXPORT jobject JNICALL Java_name_blackcap_exifwasher_exiv2_ExifData__1value
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140 (JNIEnv *jEnv, jobject jThis, jstring key) {
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141 Exiv2::ExifData *data = reinterpret_cast<Exiv2::ExifData *> (getPointer(jEnv, jThis));
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142 if (jEnv->ExceptionCheck()) return NULL;
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143 const char *cKey = jEnv->GetStringUTFChars(key, NULL);
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144 Exiv2::ExifData::const_iterator found = data->findKey(Exiv2::ExifKey(std::string(cKey)));
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145 jEnv->ReleaseStringUTFChars(key, cKey);
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146 if (found == data->end()) {
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147 return NULL;
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148 }
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149 jclass klass = jEnv->FindClass("name/blackcap/exifwasher/exiv2/ExifData$Value");
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150 if (jEnv->ExceptionCheck()) return NULL;
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151 jstring type = jEnv->NewStringUTF(found->typeName());
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152 jstring value = jEnv->NewStringUTF(found->toString().c_str());
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153 jmethodID method = jEnv->GetMethodID(klass, "<init>", "(Ljava/lang/String;Ljava/lang/String;)V");
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154 if (jEnv->ExceptionCheck()) return NULL;
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155 return jEnv->NewObject(klass, method, type, value);
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156 }
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157
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158 /*
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159 * Class: name_blackcap_exifwasher_exiv2_ExifData
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160 * Method: _keys
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161 * Signature: ()[Ljava/lang/String;
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162 */
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163 JNIEXPORT jobjectArray JNICALL Java_name_blackcap_exifwasher_exiv2_ExifData__1keys
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164 (JNIEnv *jEnv, jobject jThis) {
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165 Exiv2::ExifData *data = reinterpret_cast<Exiv2::ExifData *> (getPointer(jEnv, jThis));
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166 if (jEnv->ExceptionCheck()) return NULL;
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167 jclass klass = jEnv->FindClass("java/lang/String");
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168 if (jEnv->ExceptionCheck()) return NULL;
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169 jobjectArray ret = jEnv->NewObjectArray(data->count(), klass, NULL);
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170 if (jEnv->ExceptionCheck()) return NULL;
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171 Exiv2::ExifData::const_iterator end = data->end();
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172 jsize j = 0;
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173 for (Exiv2::ExifData::const_iterator i = data->begin(); i != end; ++i) {
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174 jEnv->SetObjectArrayElement(ret, j++, jEnv->NewStringUTF(i->key().c_str()));
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175 if (jEnv->ExceptionCheck()) break;
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176 }
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177 return ret;
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178 }
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179
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180 #ifdef __cplusplus
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181 }
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182 #endif
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183 #endif