1 files changed, 336 insertions, 0 deletions
diff --git a/core/SkMetaData.cpp b/core/SkMetaData.cpp
new file mode 100644
index 00000000..5a494b35
--- /dev/null
+++ b/core/SkMetaData.cpp
@@ -0,0 +1,336 @@
+
+/*
+ * Copyright 2006 The Android Open Source Project
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+
+#include "SkMetaData.h"
+#include "SkRefCnt.h"
+
+struct PtrPair {
+    void*               fPtr;
+    SkMetaData::PtrProc fProc;
+};
+
+void* SkMetaData::RefCntProc(void* ptr, bool doRef) {
+    SkASSERT(ptr);
+    SkRefCnt* refcnt = reinterpret_cast<SkRefCnt*>(ptr);
+
+    if (doRef) {
+        refcnt->ref();
+    } else {
+        refcnt->unref();
+    }
+    return ptr;
+}
+
+SkMetaData::SkMetaData() : fRec(NULL)
+{
+}
+
+SkMetaData::SkMetaData(const SkMetaData& src) : fRec(NULL)
+{
+    *this = src;
+}
+
+SkMetaData::~SkMetaData()
+{
+    this->reset();
+}
+
+void SkMetaData::reset()
+{
+    Rec* rec = fRec;
+    while (rec) {
+        if (kPtr_Type == rec->fType) {
+            PtrPair* pair = (PtrPair*)rec->data();
+            if (pair->fProc && pair->fPtr) {
+                pair->fPtr = pair->fProc(pair->fPtr, false);
+            }
+        }
+        Rec* next = rec->fNext;
+        Rec::Free(rec);
+        rec = next;
+    }
+    fRec = NULL;
+}
+
+SkMetaData& SkMetaData::operator=(const SkMetaData& src)
+{
+    this->reset();
+
+    const Rec* rec = src.fRec;
+    while (rec)
+    {
+        this->set(rec->name(), rec->data(), rec->fDataLen, (Type)rec->fType, rec->fDataCount);
+        rec = rec->fNext;
+    }
+    return *this;
+}
+
+void SkMetaData::setS32(const char name[], int32_t value)
+{
+    (void)this->set(name, &value, sizeof(int32_t), kS32_Type, 1);
+}
+
+void SkMetaData::setScalar(const char name[], SkScalar value)
+{
+    (void)this->set(name, &value, sizeof(SkScalar), kScalar_Type, 1);
+}
+
+SkScalar* SkMetaData::setScalars(const char name[], int count, const SkScalar values[])
+{
+    SkASSERT(count > 0);
+    if (count > 0)
+        return (SkScalar*)this->set(name, values, sizeof(SkScalar), kScalar_Type, count);
+    return NULL;
+}
+
+void SkMetaData::setString(const char name[], const char value[])
+{
+    (void)this->set(name, value, sizeof(char), kString_Type, strlen(value) + 1);
+}
+
+void SkMetaData::setPtr(const char name[], void* ptr, PtrProc proc) {
+    PtrPair pair = { ptr, proc };
+    (void)this->set(name, &pair, sizeof(PtrPair), kPtr_Type, 1);
+}
+
+void SkMetaData::setBool(const char name[], bool value)
+{
+    (void)this->set(name, &value, sizeof(bool), kBool_Type, 1);
+}
+
+void SkMetaData::setData(const char name[], const void* data, size_t byteCount) {
+    (void)this->set(name, data, sizeof(char), kData_Type, byteCount);
+}
+
+void* SkMetaData::set(const char name[], const void* data, size_t dataSize, Type type, int count)
+{
+    SkASSERT(name);
+    SkASSERT(dataSize);
+    SkASSERT(count > 0);
+
+    (void)this->remove(name, type);
+
+    size_t  len = strlen(name);
+    Rec*    rec = Rec::Alloc(sizeof(Rec) + dataSize * count + len + 1);
+
+#ifndef SK_DEBUG
+    rec->fType = SkToU8(type);
+#else
+    rec->fType = type;
+#endif
+    rec->fDataLen = SkToU8(dataSize);
+    rec->fDataCount = SkToU16(count);
+    if (data)
+        memcpy(rec->data(), data, dataSize * count);
+    memcpy(rec->name(), name, len + 1);
+
+    if (kPtr_Type == type) {
+        PtrPair* pair = (PtrPair*)rec->data();
+        if (pair->fProc && pair->fPtr) {
+            pair->fPtr = pair->fProc(pair->fPtr, true);
+        }
+    }
+
+    rec->fNext = fRec;
+    fRec = rec;
+    return rec->data();
+}
+
+bool SkMetaData::findS32(const char name[], int32_t* value) const
+{
+    const Rec* rec = this->find(name, kS32_Type);
+    if (rec)
+    {
+        SkASSERT(rec->fDataCount == 1);
+        if (value)
+            *value = *(const int32_t*)rec->data();
+        return true;
+    }
+    return false;
+}
+
+bool SkMetaData::findScalar(const char name[], SkScalar* value) const
+{
+    const Rec* rec = this->find(name, kScalar_Type);
+    if (rec)
+    {
+        SkASSERT(rec->fDataCount == 1);
+        if (value)
+            *value = *(const SkScalar*)rec->data();
+        return true;
+    }
+    return false;
+}
+
+const SkScalar* SkMetaData::findScalars(const char name[], int* count, SkScalar values[]) const
+{
+    const Rec* rec = this->find(name, kScalar_Type);
+    if (rec)
+    {
+        if (count)
+            *count = rec->fDataCount;
+        if (values)
+            memcpy(values, rec->data(), rec->fDataCount * rec->fDataLen);
+        return (const SkScalar*)rec->data();
+    }
+    return NULL;
+}
+
+bool SkMetaData::findPtr(const char name[], void** ptr, PtrProc* proc) const {
+    const Rec* rec = this->find(name, kPtr_Type);
+    if (rec) {
+        SkASSERT(rec->fDataCount == 1);
+        const PtrPair* pair = (const PtrPair*)rec->data();
+        if (ptr) {
+            *ptr = pair->fPtr;
+        }
+        if (proc) {
+            *proc = pair->fProc;
+        }
+        return true;
+    }
+    return false;
+}
+
+const char* SkMetaData::findString(const char name[]) const
+{
+    const Rec* rec = this->find(name, kString_Type);
+    SkASSERT(rec == NULL || rec->fDataLen == sizeof(char));
+    return rec ? (const char*)rec->data() : NULL;
+}
+
+bool SkMetaData::findBool(const char name[], bool* value) const
+{
+    const Rec* rec = this->find(name, kBool_Type);
+    if (rec)
+    {
+        SkASSERT(rec->fDataCount == 1);
+        if (value)
+            *value = *(const bool*)rec->data();
+        return true;
+    }
+    return false;
+}
+
+const void* SkMetaData::findData(const char name[], size_t* length) const {
+    const Rec* rec = this->find(name, kData_Type);
+    if (rec) {
+        SkASSERT(rec->fDataLen == sizeof(char));
+        if (length) {
+            *length = rec->fDataCount;
+        }
+        return rec->data();
+    }
+    return NULL;
+}
+
+const SkMetaData::Rec* SkMetaData::find(const char name[], Type type) const
+{
+    const Rec* rec = fRec;
+    while (rec)
+    {
+        if (rec->fType == type && !strcmp(rec->name(), name))
+            return rec;
+        rec = rec->fNext;
+    }
+    return NULL;
+}
+
+bool SkMetaData::remove(const char name[], Type type) {
+    Rec* rec = fRec;
+    Rec* prev = NULL;
+    while (rec) {
+        Rec* next = rec->fNext;
+        if (rec->fType == type && !strcmp(rec->name(), name)) {
+            if (prev) {
+                prev->fNext = next;
+            } else {
+                fRec = next;
+            }
+
+            if (kPtr_Type == type) {
+                PtrPair* pair = (PtrPair*)rec->data();
+                if (pair->fProc && pair->fPtr) {
+                    (void)pair->fProc(pair->fPtr, false);
+                }
+            }
+            Rec::Free(rec);
+            return true;
+        }
+        prev = rec;
+        rec = next;
+    }
+    return false;
+}
+
+bool SkMetaData::removeS32(const char name[])
+{
+    return this->remove(name, kS32_Type);
+}
+
+bool SkMetaData::removeScalar(const char name[])
+{
+    return this->remove(name, kScalar_Type);
+}
+
+bool SkMetaData::removeString(const char name[])
+{
+    return this->remove(name, kString_Type);
+}
+
+bool SkMetaData::removePtr(const char name[])
+{
+    return this->remove(name, kPtr_Type);
+}
+
+bool SkMetaData::removeBool(const char name[])
+{
+    return this->remove(name, kBool_Type);
+}
+
+bool SkMetaData::removeData(const char name[]) {
+    return this->remove(name, kData_Type);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+SkMetaData::Iter::Iter(const SkMetaData& metadata) {
+    fRec = metadata.fRec;
+}
+
+void SkMetaData::Iter::reset(const SkMetaData& metadata) {
+    fRec = metadata.fRec;
+}
+
+const char* SkMetaData::Iter::next(SkMetaData::Type* t, int* count) {
+    const char* name = NULL;
+
+    if (fRec) {
+        if (t) {
+            *t = (SkMetaData::Type)fRec->fType;
+        }
+        if (count) {
+            *count = fRec->fDataCount;
+        }
+        name = fRec->name();
+
+        fRec = fRec->fNext;
+    }
+    return name;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+SkMetaData::Rec* SkMetaData::Rec::Alloc(size_t size) {
+    return (Rec*)sk_malloc_throw(size);
+}
+
+void SkMetaData::Rec::Free(Rec* rec) {
+    sk_free(rec);
+}