Mercurial > cgi-bin > hgweb.cgi > JpegWasher

annotate src/name/blackcap/exifwasher/exiv2/native.cpp @ 13:a59d84674fb0

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Make it seamlessly work on IPTC and XMP metadata, too.
author David Barts <davidb@stashtea.com>
date Sat, 11 Apr 2020 09:14:31 -0700
parents efd9fe2d70d7
children cd2ca4727b7f
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1 #include <jni.h>
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2 #include <string.h>
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3 #include <exiv2/exiv2.hpp>
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4 #include <exception>
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5 #include <iostream>
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6 #include <iomanip>
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7 #include <cassert>
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8
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9 /* Functions for class name_blackcap_exifwasher_exiv2_Image */
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10
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11 #ifndef _Included_name_blackcap_exifwasher_exiv2_Image
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12 #define _Included_name_blackcap_exifwasher_exiv2_Image
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13 #ifdef __cplusplus
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14 extern "C" {
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15 #endif
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16
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17 /*
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18 * Utility function to get pointer field.
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19 */
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20 Exiv2::Image *getPointer(JNIEnv *jEnv, jobject jThis) {
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21 return reinterpret_cast<Exiv2::Image *>
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22 (jEnv->GetLongField(jThis,
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23 jEnv->GetFieldID(jEnv->GetObjectClass(jThis), "pointer", "J")));
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24 }
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25
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26 /*
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27 * Class: name_blackcap_exifwasher_exiv2_Image
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28 * Method: _ctor
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29 * Signature: (Ljava/lang/String;)J
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30 */
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31 JNIEXPORT jlong JNICALL Java_name_blackcap_exifwasher_exiv2_Image__1ctor
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32 (JNIEnv *jEnv, jobject jThis, jstring path) {
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33 const char *cPath = jEnv->GetStringUTFChars(path, NULL);
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34 jlong ret = 0;
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35 try {
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36 ret = reinterpret_cast<jlong> (Exiv2::ImageFactory::open(cPath).release());
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37 } catch (std::exception& e) {
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38 jEnv->ExceptionClear();
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39 jclass ex = jEnv->FindClass("name/blackcap/exifwasher/exiv2/Exiv2Exception");
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40 jEnv->ThrowNew(ex, e.what());
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41 }
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42 jEnv->ReleaseStringUTFChars(path, cPath);
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43 return ret;
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44 }
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45
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46 /*
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47 * Class: name_blackcap_exifwasher_exiv2_Image
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48 * Method: _writeMetadata
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49 * Signature: ()V
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50 */
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51 JNIEXPORT void JNICALL Java_name_blackcap_exifwasher_exiv2_Image__1writeMetadata
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52 (JNIEnv *jEnv, jobject jThis) {
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53 Exiv2::Image *image = getPointer(jEnv, jThis);
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54 if (jEnv->ExceptionCheck()) return;
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55 try {
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56 image->writeMetadata();
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57 } catch (std::exception& e) {
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58 jEnv->ExceptionClear();
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59 jclass ex = jEnv->FindClass("name/blackcap/exifwasher/exiv2/Exiv2Exception");
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60 jEnv->ThrowNew(ex, e.what());
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61 }
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62 }
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63
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64 /*
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65 * Class: name_blackcap_exifwasher_exiv2_Image
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66 * Method: _getMetadata
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67 * Signature: ()J
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68 */
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69 JNIEXPORT jlong JNICALL Java_name_blackcap_exifwasher_exiv2_Image__1getMetadata
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70 (JNIEnv *jEnv, jobject jThis) {
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71 Exiv2::Image *image = getPointer(jEnv, jThis);
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72 if (jEnv->ExceptionCheck()) return 0;
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73 try {
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74 image->readMetadata();
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75 } catch (std::exception& e) {
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76 jEnv->ExceptionClear();
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77 jclass ex = jEnv->FindClass("name/blackcap/exifwasher/exiv2/Exiv2Exception");
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78 jEnv->ThrowNew(ex, e.what());
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79 return 0;
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80 }
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81 return reinterpret_cast<jlong>(image);
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82 }
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83
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84 /*
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85 * Class: name_blackcap_exifwasher_exiv2_Image
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86 * Method: _dtor
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87 * Signature: ()V
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88 */
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89 JNIEXPORT void JNICALL Java_name_blackcap_exifwasher_exiv2_Image__1dtor
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90 (JNIEnv *jEnv, jobject jThis) {
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91 Exiv2::Image *image = getPointer(jEnv, jThis);
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92 if (jEnv->ExceptionCheck()) return;
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93 delete image;
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94 }
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95
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96 #ifdef __cplusplus
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97 }
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98 #endif
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99 #endif
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100 /* Header for class name_blackcap_exifwasher_exiv2_ExifData */
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101
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102 /*
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103 * Utility function to delete a (key, value) pair.
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104 */
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105 template<class D, class K>
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106 void deleteValue(D &data, const char *key) {
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107 typename D::iterator found = data.findKey(K(std::string(key)));
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108 data.erase(found);
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109 }
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110
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111 /*
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112 * Utility function to retrieve a value, given a key.
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113 */
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114 template<class D, class K>
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115 jobject getValue(JNIEnv *jEnv, D &data, const char *key) {
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116 typename D::iterator found = data.findKey(K(std::string(key)));
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117 if (found == data.end()) {
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118 return NULL;
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119 }
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120 jclass klass = jEnv->FindClass("name/blackcap/exifwasher/exiv2/ExifData$Value");
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121 if (jEnv->ExceptionCheck()) return NULL;
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122 jstring type = jEnv->NewStringUTF(found->typeName());
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123 jstring value = jEnv->NewStringUTF(found->toString().c_str());
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124 jmethodID method = jEnv->GetMethodID(klass, "<init>", "(Ljava/lang/String;Ljava/lang/String;)V");
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125 if (jEnv->ExceptionCheck()) return NULL;
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126 return jEnv->NewObject(klass, method, type, value);
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127 }
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128
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129 /*
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130 * Utility function to read keys, given a target to put them and a collection
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131 * of data.
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132 */
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133 template<class D>
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134 jsize getKeys(JNIEnv *jEnv, jobjectArray target, jsize start, D &data) {
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135 typename D::const_iterator end = data.end();
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136 jsize j = start;
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137 for (typename D::const_iterator i = data.begin(); i != end; ++i) {
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138 jEnv->SetObjectArrayElement(target, j++, jEnv->NewStringUTF(i->key().c_str()));
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139 if (jEnv->ExceptionCheck()) break;
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140 }
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141 return j;
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142 }
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143
0
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144 #ifndef _Included_name_blackcap_exifwasher_exiv2_ExifData
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145 #define _Included_name_blackcap_exifwasher_exiv2_ExifData
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146 #ifdef __cplusplus
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147 extern "C" {
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148 #endif
13
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149
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150 /*
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151 * Utility function to parse out a type prefix from a key name.
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152 */
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153 char *getType(const char *key) {
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154 char *dot = strchr(key, '.');
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155 if (dot == NULL)
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156 throw std::invalid_argument(std::string("invalid key: ") + std::string(key));
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157 int length = dot - key;
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158 char *ret = (char *) malloc(length + 1);
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159 memcpy(ret, key, length);
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160 ret[length] = '\0';
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161 return ret;
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162 }
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163
0
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164 /*
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165 * Class: name_blackcap_exifwasher_exiv2_ExifData
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166 * Method: _erase
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167 * Signature: (Ljava/lang/String;)V
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168 */
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169 JNIEXPORT void JNICALL Java_name_blackcap_exifwasher_exiv2_ExifData__1erase
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170 (JNIEnv *jEnv, jobject jThis, jstring key) {
13
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171 Exiv2::Image *image = getPointer(jEnv, jThis);
1
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172 if (jEnv->ExceptionCheck()) return;
0
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173 const char *cKey = jEnv->GetStringUTFChars(key, NULL);
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174 char *type = NULL;
0
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175 try {
13
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176 type = getType(cKey);
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177 if (!strcmp(type, "Exif")) {
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178 deleteValue<Exiv2::ExifData, Exiv2::ExifKey>(image->exifData(), cKey);
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179 } else if (!strcmp(type, "Xmp")) {
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180 deleteValue<Exiv2::XmpData, Exiv2::XmpKey>(image->xmpData(), cKey);
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181 } else if (!strcmp(type, "Iptc")) {
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182 deleteValue<Exiv2::IptcData, Exiv2::IptcKey>(image->iptcData(), cKey);
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183 } else {
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184 throw std::invalid_argument(std::string("invalid key: ") + std::string(cKey));
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185 }
2
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186 } catch (std::exception& e) {
1
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187 jEnv->ExceptionClear();
0
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188 jclass ex = jEnv->FindClass("name/blackcap/exifwasher/exiv2/Exiv2Exception");
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189 jEnv->ThrowNew(ex, e.what());
0
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190 }
13
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191 if (type != NULL) free(type);
0
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192 jEnv->ReleaseStringUTFChars(key, cKey);
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193 }
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194
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195 /*
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196 * Class: name_blackcap_exifwasher_exiv2_ExifData
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197 * Method: _value
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198 * Signature: (Ljava/lang/String;)Lname/blackcap/exifwasher/exiv2/ExifData/Value;
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199 */
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200 JNIEXPORT jobject JNICALL Java_name_blackcap_exifwasher_exiv2_ExifData__1value
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201 (JNIEnv *jEnv, jobject jThis, jstring key) {
13
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202 Exiv2::Image *image = getPointer(jEnv, jThis);
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203 if (jEnv->ExceptionCheck()) return NULL;
0
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204 const char *cKey = jEnv->GetStringUTFChars(key, NULL);
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205 char *type = NULL;
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206 jobject ret = NULL;
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207 try {
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208 type = getType(cKey);
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209 if (!strcmp(type, "Exif")) {
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210 ret = getValue<Exiv2::ExifData, Exiv2::ExifKey>(jEnv, image->exifData(), cKey);
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211 } else if (!strcmp(type, "Xmp")) {
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212 ret = getValue<Exiv2::XmpData, Exiv2::XmpKey>(jEnv, image->xmpData(), cKey);
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213 } else if (!strcmp(type, "Iptc")) {
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214 ret = getValue<Exiv2::IptcData, Exiv2::IptcKey>(jEnv, image->iptcData(), cKey);
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215 } else {
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216 throw std::invalid_argument(std::string("invalid key: ") + std::string(cKey));
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217 }
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218 } catch (std::exception& e) {
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219 jEnv->ExceptionClear();
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220 jclass ex = jEnv->FindClass("name/blackcap/exifwasher/exiv2/Exiv2Exception");
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221 jEnv->ThrowNew(ex, e.what());
0
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222 }
13
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223 if (type != NULL) free(type);
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224 jEnv->ReleaseStringUTFChars(key, cKey);
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225 return ret;
0
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226 }
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227
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228 /*
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229 * Class: name_blackcap_exifwasher_exiv2_ExifData
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230 * Method: _keys
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231 * Signature: ()[Ljava/lang/String;
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232 */
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233 JNIEXPORT jobjectArray JNICALL Java_name_blackcap_exifwasher_exiv2_ExifData__1keys
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234 (JNIEnv *jEnv, jobject jThis) {
13
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235 Exiv2::Image *image = getPointer(jEnv, jThis);
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236 Exiv2::ExifData eData = image->exifData();
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237 Exiv2::XmpData xData = image->xmpData();
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238 Exiv2::IptcData iData = image->iptcData();
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239 if (jEnv->ExceptionCheck()) return NULL;
0
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240 jclass klass = jEnv->FindClass("java/lang/String");
1
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241 if (jEnv->ExceptionCheck()) return NULL;
13
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242 jobjectArray ret = jEnv->NewObjectArray(eData.count() + iData.count() + xData.count(), klass, NULL);
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243 if (jEnv->ExceptionCheck()) return NULL;
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244 jsize start = getKeys(jEnv, ret, 0, eData);
1
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245 if (jEnv->ExceptionCheck()) return NULL;
13
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246 start = getKeys(jEnv, ret, start, xData);
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247 if (jEnv->ExceptionCheck()) return NULL;
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248 start = getKeys(jEnv, ret, start, iData);
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249 if (jEnv->ExceptionCheck()) return NULL;
0
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250 return ret;
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251 }
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252
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253 #ifdef __cplusplus
db63d01a23c6 JNI calls and test case (finally!) seem to work.
David Barts <n5jrn@me.com>
parents:
diff changeset
254 }
db63d01a23c6 JNI calls and test case (finally!) seem to work.
David Barts <n5jrn@me.com>
parents:
diff changeset
255 #endif
db63d01a23c6 JNI calls and test case (finally!) seem to work.
David Barts <n5jrn@me.com>
parents:
diff changeset
256 #endif