Initial checkin of "foundation" library for future stagefright development.

Change-Id: I11714dcaa647d0437a13e4c5b953b35e712da8f3

1 files changed, 331 insertions, 0 deletions

diff --git a/media/libstagefright/foundation/AString.cpp b/media/libstagefright/foundation/AString.cpp
new file mode 100644
index 0000000..61b76cf
--- /dev/null
+++ b/media/libstagefright/foundation/AString.cpp
@@ -0,0 +1,331 @@
+/*
+ * Copyright (C) 2010 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 <ctype.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "ADebug.h"
+#include "AString.h"
+
+namespace android {
+
+// static
+const char *AString::kEmptyString = "";
+
+AString::AString()
+    : mData((char *)kEmptyString),
+      mSize(0),
+      mAllocSize(1) {
+}
+
+AString::AString(const char *s)
+    : mData(NULL),
+      mSize(0),
+      mAllocSize(1) {
+    setTo(s);
+}
+
+AString::AString(const char *s, size_t size)
+    : mData(NULL),
+      mSize(0),
+      mAllocSize(1) {
+    setTo(s, size);
+}
+
+AString::AString(const AString &from)
+    : mData(NULL),
+      mSize(0),
+      mAllocSize(1) {
+    setTo(from, 0, from.size());
+}
+
+AString::AString(const AString &from, size_t offset, size_t n)
+    : mData(NULL),
+      mSize(0),
+      mAllocSize(1) {
+    setTo(from, offset, n);
+}
+
+AString::~AString() {
+    clear();
+}
+
+AString &AString::operator=(const AString &from) {
+    if (&from != this) {
+        setTo(from, 0, from.size());
+    }
+
+    return *this;
+}
+
+size_t AString::size() const {
+    return mSize;
+}
+
+const char *AString::c_str() const {
+    return mData;
+}
+
+bool AString::empty() const {
+    return mSize == 0;
+}
+
+void AString::setTo(const char *s) {
+    setTo(s, strlen(s));
+}
+
+void AString::setTo(const char *s, size_t size) {
+    clear();
+    append(s, size);
+}
+
+void AString::setTo(const AString &from, size_t offset, size_t n) {
+    CHECK(&from != this);
+
+    clear();
+    setTo(from.mData + offset, n);
+}
+
+void AString::clear() {
+    if (mData && mData != kEmptyString) {
+        free(mData);
+        mData = NULL;
+    }
+
+    mData = (char *)kEmptyString;
+    mSize = 0;
+    mAllocSize = 1;
+}
+
+size_t AString::hash() const {
+    size_t x = 0;
+    for (size_t i = 0; i < mSize; ++i) {
+        x = (x * 31) + mData[i];
+    }
+
+    return x;
+}
+
+bool AString::operator==(const AString &other) const {
+    return mSize == other.mSize && !memcmp(mData, other.mData, mSize);
+}
+
+void AString::trim() {
+    makeMutable();
+
+    size_t i = 0;
+    while (i < mSize && isspace(mData[i])) {
+        ++i;
+    }
+
+    size_t j = mSize;
+    while (j > i && isspace(mData[j - 1])) {
+        --j;
+    }
+
+    memmove(mData, &mData[i], j - i);
+    mSize = j - i;
+    mData[mSize] = '\0';
+}
+
+void AString::erase(size_t start, size_t n) {
+    CHECK_LT(start, mSize);
+    CHECK_LE(start + n, mSize);
+
+    makeMutable();
+
+    memmove(&mData[start], &mData[start + n], mSize - start - n);
+    mSize -= n;
+    mData[mSize] = '\0';
+}
+
+void AString::makeMutable() {
+    if (mData == kEmptyString) {
+        mData = strdup(kEmptyString);
+    }
+}
+
+void AString::append(const char *s) {
+    append(s, strlen(s));
+}
+
+void AString::append(const char *s, size_t size) {
+    makeMutable();
+
+    if (mSize + size + 1 > mAllocSize) {
+        mAllocSize = (mAllocSize + size + 31) & -32;
+        mData = (char *)realloc(mData, mAllocSize);
+        CHECK(mData != NULL);
+    }
+
+    memcpy(&mData[mSize], s, size);
+    mSize += size;
+    mData[mSize] = '\0';
+}
+
+void AString::append(const AString &from) {
+    append(from.c_str(), from.size());
+}
+
+void AString::append(const AString &from, size_t offset, size_t n) {
+    append(from.c_str() + offset, n);
+}
+
+void AString::append(int x) {
+    char s[16];
+    sprintf(s, "%d", x);
+
+    append(s);
+}
+
+void AString::append(unsigned x) {
+    char s[16];
+    sprintf(s, "%u", x);
+
+    append(s);
+}
+
+void AString::append(long x) {
+    char s[16];
+    sprintf(s, "%ld", x);
+
+    append(s);
+}
+
+void AString::append(unsigned long x) {
+    char s[16];
+    sprintf(s, "%lu", x);
+
+    append(s);
+}
+
+void AString::append(long long x) {
+    char s[32];
+    sprintf(s, "%lld", x);
+
+    append(s);
+}
+
+void AString::append(unsigned long long x) {
+    char s[32];
+    sprintf(s, "%llu", x);
+
+    append(s);
+}
+
+void AString::append(float x) {
+    char s[16];
+    sprintf(s, "%f", x);
+
+    append(s);
+}
+
+void AString::append(double x) {
+    char s[16];
+    sprintf(s, "%f", x);
+
+    append(s);
+}
+
+void AString::append(void *x) {
+    char s[16];
+    sprintf(s, "%p", x);
+
+    append(s);
+}
+
+ssize_t AString::find(const char *substring, size_t start) const {
+    CHECK_LE(start, size());
+
+    const char *match = strstr(mData + start, substring);
+
+    if (match == NULL) {
+        return -1;
+    }
+
+    return match - mData;
+}
+
+void AString::insert(const AString &from, size_t insertionPos) {
+    insert(from.c_str(), from.size(), insertionPos);
+}
+
+void AString::insert(const char *from, size_t size, size_t insertionPos) {
+    CHECK_GE(insertionPos, 0u);
+    CHECK_LE(insertionPos, mSize);
+
+    makeMutable();
+
+    if (mSize + size + 1 > mAllocSize) {
+        mAllocSize = (mAllocSize + size + 31) & -32;
+        mData = (char *)realloc(mData, mAllocSize);
+        CHECK(mData != NULL);
+    }
+
+    memmove(&mData[insertionPos + size],
+            &mData[insertionPos], mSize - insertionPos + 1);
+
+    memcpy(&mData[insertionPos], from, size);
+
+    mSize += size;
+}
+
+bool AString::operator<(const AString &other) const {
+    return compare(other) < 0;
+}
+
+bool AString::operator>(const AString &other) const {
+    return compare(other) > 0;
+}
+
+int AString::compare(const AString &other) const {
+    return strcmp(mData, other.mData);
+}
+
+void AString::tolower() {
+    makeMutable();
+
+    for (size_t i = 0; i < mSize; ++i) {
+        mData[i] = ::tolower(mData[i]);
+    }
+}
+
+bool AString::startsWith(const char *prefix) const {
+    return !strncmp(mData, prefix, strlen(prefix));
+}
+
+AString StringPrintf(const char *format, ...) {
+    va_list ap;
+    va_start(ap, format);
+
+    char *buffer;
+    vasprintf(&buffer, format, ap);
+
+    va_end(ap);
+
+    AString result(buffer);
+
+    free(buffer);
+    buffer = NULL;
+
+    return result;
+}
+
+}  // namespace android
+