move SkMetaData into core

git-svn-id: http://skia.googlecode.com/svn/trunk@1018 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 428 insertions, 0 deletions

diff --git a/src/core/SkMetaData.cpp b/src/core/SkMetaData.cpp
new file mode 100644
index 0000000000..c871efb136
--- /dev/null
+++ b/src/core/SkMetaData.cpp
@@ -0,0 +1,428 @@
+/* libs/graphics/views/SkMetaData.cpp
+**
+** Copyright 2006, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License"); 
+** you may not use this file except in compliance with the License. 
+** You may obtain a copy of the License at 
+**
+**     http://www.apache.org/licenses/LICENSE-2.0 
+**
+** Unless required by applicable law or agreed to in writing, software 
+** distributed under the License is distributed on an "AS IS" BASIS, 
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+** See the License for the specific language governing permissions and 
+** limitations under the License.
+*/
+
+#include "SkMetaData.h"
+
+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)
+    {
+        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)
+{
+    (void)this->set(name, &ptr, sizeof(void*), 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);
+
+#ifdef SK_DEBUG
+    rec->fName = rec->name();
+    switch (type) {
+    case kS32_Type:
+        rec->fData.fS32 = *(const int32_t*)rec->data();
+        break;
+    case kScalar_Type:
+        rec->fData.fScalar = *(const SkScalar*)rec->data();
+        break;
+    case kString_Type:
+        rec->fData.fString = (const char*)rec->data();
+        break;
+    case kPtr_Type:
+        rec->fData.fPtr = *(void**)rec->data();
+        break;
+    case kBool_Type:
+        rec->fData.fBool = *(const bool*)rec->data();
+        break;
+    case kData_Type:
+        rec->fData.fPtr = rec->data();
+        break;
+    default:
+        SkASSERT(!"bad type");
+        break;
+    }
+#endif
+
+    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** value) const
+{
+    const Rec* rec = this->find(name, kPtr_Type);
+    if (rec)
+    {
+        SkASSERT(rec->fDataCount == 1);
+        if (value)
+            *value = *(void**)rec->data();
+        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;
+            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);
+}
+
+///////////////////////////////////////////////////////////////////////////////////
+///////////////////////////////////////////////////////////////////////////////////
+
+#ifdef SK_DEBUG
+
+void SkMetaData::UnitTest()
+{
+#ifdef SK_SUPPORT_UNITTEST
+    SkMetaData  m1;
+
+    SkASSERT(!m1.findS32("int"));
+    SkASSERT(!m1.findScalar("scalar"));
+    SkASSERT(!m1.findString("hello"));
+    SkASSERT(!m1.removeS32("int"));
+    SkASSERT(!m1.removeScalar("scalar"));
+    SkASSERT(!m1.removeString("hello"));
+    SkASSERT(!m1.removeString("true"));
+    SkASSERT(!m1.removeString("false"));
+
+    m1.setS32("int", 12345);
+    m1.setScalar("scalar", SK_Scalar1 * 42);
+    m1.setString("hello", "world");
+    m1.setPtr("ptr", &m1);
+    m1.setBool("true", true);
+    m1.setBool("false", false);
+
+    int32_t     n;
+    SkScalar    s;
+
+    m1.setScalar("scalar", SK_Scalar1/2);
+
+    SkASSERT(m1.findS32("int", &n) && n == 12345);
+    SkASSERT(m1.findScalar("scalar", &s) && s == SK_Scalar1/2);
+    SkASSERT(!strcmp(m1.findString("hello"), "world"));
+    SkASSERT(m1.hasBool("true", true));
+    SkASSERT(m1.hasBool("false", false));
+
+    Iter    iter(m1);
+    const char* name;
+
+    static const struct {
+        const char*         fName;
+        SkMetaData::Type    fType;
+        int                 fCount;
+    } gElems[] = {
+        { "int",    SkMetaData::kS32_Type,      1 },
+        { "scalar", SkMetaData::kScalar_Type,   1 },
+        { "ptr",    SkMetaData::kPtr_Type,      1 },
+        { "hello",  SkMetaData::kString_Type,   sizeof("world") },
+        { "true",   SkMetaData::kBool_Type,     1 },
+        { "false",  SkMetaData::kBool_Type,     1 }
+    };
+
+    int                 loop = 0;
+    int count;
+    SkMetaData::Type    t;
+    while ((name = iter.next(&t, &count)) != NULL)
+    {
+        int match = 0;
+        for (unsigned i = 0; i < SK_ARRAY_COUNT(gElems); i++)
+        {
+            if (!strcmp(name, gElems[i].fName))
+            {
+                match += 1;
+                SkASSERT(gElems[i].fType == t);
+                SkASSERT(gElems[i].fCount == count);
+            }
+        }
+        SkASSERT(match == 1);
+        loop += 1;
+    }
+    SkASSERT(loop == SK_ARRAY_COUNT(gElems));
+
+    SkASSERT(m1.removeS32("int"));
+    SkASSERT(m1.removeScalar("scalar"));
+    SkASSERT(m1.removeString("hello"));
+    SkASSERT(m1.removeBool("true"));
+    SkASSERT(m1.removeBool("false"));
+
+    SkASSERT(!m1.findS32("int"));
+    SkASSERT(!m1.findScalar("scalar"));
+    SkASSERT(!m1.findString("hello"));
+    SkASSERT(!m1.findBool("true"));
+    SkASSERT(!m1.findBool("false"));
+#endif
+}
+
+#endif
+
+