1 // 2 // Copyright 2006 The Android Open Source Project 3 // 4 // Build resource files from raw assets. 5 // 6 7 #ifndef STRING_POOL_H 8 #define STRING_POOL_H 9 10 #include "Main.h" 11 #include "AaptAssets.h" 12 13 #include <androidfw/ResourceTypes.h> 14 #include <utils/String16.h> 15 #include <utils/TypeHelpers.h> 16 17 #include <sys/types.h> 18 #include <sys/stat.h> 19 #include <fcntl.h> 20 #include <ctype.h> 21 #include <errno.h> 22 23 #include <libexpat/expat.h> 24 25 using namespace android; 26 27 #define PRINT_STRING_METRICS 0 28 29 void strcpy16_htod(uint16_t* dst, const uint16_t* src); 30 31 void printStringPool(const ResStringPool* pool); 32 33 /** 34 * The StringPool class is used as an intermediate representation for 35 * generating the string pool resource data structure that can be parsed with 36 * ResStringPool in include/utils/ResourceTypes.h. 37 */ 38 class StringPool 39 { 40 public: 41 struct entry { 42 entry() : offset(0) { } 43 entry(const String16& _value) : value(_value), offset(0), hasStyles(false) { } 44 entry(const entry& o) : value(o.value), offset(o.offset), 45 hasStyles(o.hasStyles), indices(o.indices), 46 configTypeName(o.configTypeName), configs(o.configs) { } 47 48 String16 value; 49 size_t offset; 50 bool hasStyles; 51 Vector<size_t> indices; 52 String8 configTypeName; 53 Vector<ResTable_config> configs; 54 55 String8 makeConfigsString() const; 56 57 int compare(const entry& o) const; 58 59 inline bool operator<(const entry& o) const { return compare(o) < 0; } 60 inline bool operator<=(const entry& o) const { return compare(o) <= 0; } 61 inline bool operator==(const entry& o) const { return compare(o) == 0; } 62 inline bool operator!=(const entry& o) const { return compare(o) != 0; } 63 inline bool operator>=(const entry& o) const { return compare(o) >= 0; } 64 inline bool operator>(const entry& o) const { return compare(o) > 0; } 65 }; 66 67 struct entry_style_span { 68 String16 name; 69 ResStringPool_span span; 70 }; 71 72 struct entry_style { 73 entry_style() : offset(0) { } 74 75 entry_style(const entry_style& o) : offset(o.offset), spans(o.spans) { } 76 77 size_t offset; 78 Vector<entry_style_span> spans; 79 }; 80 81 /** 82 * If 'utf8' is true, strings will be encoded with UTF-8 instead of 83 * left in Java's native UTF-16. 84 */ 85 explicit StringPool(bool utf8 = false); 86 87 /** 88 * Add a new string to the pool. If mergeDuplicates is true, thenif 89 * the string already exists the existing entry for it will be used; 90 * otherwise, or if the value doesn't already exist, a new entry is 91 * created. 92 * 93 * Returns the index in the entry array of the new string entry. 94 */ 95 ssize_t add(const String16& value, bool mergeDuplicates = false, 96 const String8* configTypeName = NULL, const ResTable_config* config = NULL); 97 98 ssize_t add(const String16& value, const Vector<entry_style_span>& spans, 99 const String8* configTypeName = NULL, const ResTable_config* config = NULL); 100 101 status_t addStyleSpan(size_t idx, const String16& name, 102 uint32_t start, uint32_t end); 103 status_t addStyleSpans(size_t idx, const Vector<entry_style_span>& spans); 104 status_t addStyleSpan(size_t idx, const entry_style_span& span); 105 106 // Sort the contents of the string block by the configuration associated 107 // with each item. After doing this you can use mapOriginalPosToNewPos() 108 // to find out the new position given the position originally returned by 109 // add(). 110 void sortByConfig(); 111 112 // For use after sortByConfig() to map from the original position of 113 // a string to its new sorted position. 114 size_t mapOriginalPosToNewPos(size_t originalPos) const { 115 return mOriginalPosToNewPos.itemAt(originalPos); 116 } 117 118 sp<AaptFile> createStringBlock(); 119 120 status_t writeStringBlock(const sp<AaptFile>& pool); 121 122 /** 123 * Find out an offset in the pool for a particular string. If the string 124 * pool is sorted, this can not be called until after createStringBlock() 125 * or writeStringBlock() has been called 126 * (which determines the offsets). In the case of a string that appears 127 * multiple times in the pool, the first offset will be returned. Returns 128 * -1 if the string does not exist. 129 */ 130 ssize_t offsetForString(const String16& val) const; 131 132 /** 133 * Find all of the offsets in the pool for a particular string. If the 134 * string pool is sorted, this can not be called until after 135 * createStringBlock() or writeStringBlock() has been called 136 * (which determines the offsets). Returns NULL if the string does not exist. 137 */ 138 const Vector<size_t>* offsetsForString(const String16& val) const; 139 140 private: 141 static int config_sort(void* state, const void* lhs, const void* rhs); 142 143 const bool mUTF8; 144 145 // The following data structures represent the actual structures 146 // that will be generated for the final string pool. 147 148 // Raw array of unique strings, in some arbitrary order. This is the 149 // actual strings that appear in the final string pool, in the order 150 // that they will be written. 151 Vector<entry> mEntries; 152 // Array of indices into mEntries, in the order they were 153 // added to the pool. This can be different than mEntries 154 // if the same string was added multiple times (it will appear 155 // once in mEntries, with multiple occurrences in this array). 156 // This is the lookup array that will be written for finding 157 // the string for each offset/position in the string pool. 158 Vector<size_t> mEntryArray; 159 // Optional style span information associated with each index of 160 // mEntryArray. 161 Vector<entry_style> mEntryStyleArray; 162 163 // The following data structures are used for book-keeping as the 164 // string pool is constructed. 165 166 // Unique set of all the strings added to the pool, mapped to 167 // the first index of mEntryArray where the value was added. 168 DefaultKeyedVector<String16, ssize_t> mValues; 169 // This array maps from the original position a string was placed at 170 // in mEntryArray to its new position after being sorted with sortByConfig(). 171 Vector<size_t> mOriginalPosToNewPos; 172 }; 173 174 // The entry types are trivially movable because all fields they contain, including 175 // the vectors and strings, are trivially movable. 176 namespace android { 177 ANDROID_TRIVIAL_MOVE_TRAIT(StringPool::entry); 178 ANDROID_TRIVIAL_MOVE_TRAIT(StringPool::entry_style_span); 179 ANDROID_TRIVIAL_MOVE_TRAIT(StringPool::entry_style); 180 }; 181 182 #endif 183 184
