Initial Contribution

1 files changed, 357 insertions, 0 deletions

diff --git a/minzip/Bits.h b/minzip/Bits.h
new file mode 100644
index 0000000..f96e6c4
--- /dev/null
+++ b/minzip/Bits.h
@@ -0,0 +1,357 @@
+/*
+ * Copyright 2006 The Android Open Source Project
+ *
+ * Some handy functions for manipulating bits and bytes.
+ */
+#ifndef _MINZIP_BITS
+#define _MINZIP_BITS
+
+#include "inline_magic.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+/*
+ * Get 1 byte.  (Included to make the code more legible.)
+ */
+INLINE unsigned char get1(unsigned const char* pSrc)
+{
+    return *pSrc;
+}
+
+/*
+ * Get 2 big-endian bytes.
+ */
+INLINE unsigned short get2BE(unsigned char const* pSrc)
+{
+    unsigned short result;
+
+    result = *pSrc++ << 8;
+    result |= *pSrc++;
+
+    return result;
+}
+
+/*
+ * Get 4 big-endian bytes.
+ */
+INLINE unsigned int get4BE(unsigned char const* pSrc)
+{
+    unsigned int result;
+
+    result = *pSrc++ << 24;
+    result |= *pSrc++ << 16;
+    result |= *pSrc++ << 8;
+    result |= *pSrc++;
+
+    return result;
+}
+
+/*
+ * Get 8 big-endian bytes.
+ */
+INLINE unsigned long long get8BE(unsigned char const* pSrc)
+{
+    unsigned long long result;
+
+    result = (unsigned long long) *pSrc++ << 56;
+    result |= (unsigned long long) *pSrc++ << 48;
+    result |= (unsigned long long) *pSrc++ << 40;
+    result |= (unsigned long long) *pSrc++ << 32;
+    result |= (unsigned long long) *pSrc++ << 24;
+    result |= (unsigned long long) *pSrc++ << 16;
+    result |= (unsigned long long) *pSrc++ << 8;
+    result |= (unsigned long long) *pSrc++;
+
+    return result;
+}
+
+/*
+ * Get 2 little-endian bytes.
+ */
+INLINE unsigned short get2LE(unsigned char const* pSrc)
+{
+    unsigned short result;
+
+    result = *pSrc++;
+    result |= *pSrc++ << 8;
+
+    return result;
+}
+
+/*
+ * Get 4 little-endian bytes.
+ */
+INLINE unsigned int get4LE(unsigned char const* pSrc)
+{
+    unsigned int result;
+
+    result = *pSrc++;
+    result |= *pSrc++ << 8;
+    result |= *pSrc++ << 16;
+    result |= *pSrc++ << 24;
+
+    return result;
+}
+
+/*
+ * Get 8 little-endian bytes.
+ */
+INLINE unsigned long long get8LE(unsigned char const* pSrc)
+{
+    unsigned long long result;
+
+    result = (unsigned long long) *pSrc++;
+    result |= (unsigned long long) *pSrc++ << 8;
+    result |= (unsigned long long) *pSrc++ << 16;
+    result |= (unsigned long long) *pSrc++ << 24;
+    result |= (unsigned long long) *pSrc++ << 32;
+    result |= (unsigned long long) *pSrc++ << 40;
+    result |= (unsigned long long) *pSrc++ << 48;
+    result |= (unsigned long long) *pSrc++ << 56;
+
+    return result;
+}
+
+/*
+ * Grab 1 byte and advance the data pointer.
+ */
+INLINE unsigned char read1(unsigned const char** ppSrc)
+{
+    return *(*ppSrc)++;
+}
+
+/*
+ * Grab 2 big-endian bytes and advance the data pointer.
+ */
+INLINE unsigned short read2BE(unsigned char const** ppSrc)
+{
+    unsigned short result;
+
+    result = *(*ppSrc)++ << 8;
+    result |= *(*ppSrc)++;
+
+    return result;
+}
+
+/*
+ * Grab 4 big-endian bytes and advance the data pointer.
+ */
+INLINE unsigned int read4BE(unsigned char const** ppSrc)
+{
+    unsigned int result;
+
+    result = *(*ppSrc)++ << 24;
+    result |= *(*ppSrc)++ << 16;
+    result |= *(*ppSrc)++ << 8;
+    result |= *(*ppSrc)++;
+
+    return result;
+}
+
+/*
+ * Get 8 big-endian bytes.
+ */
+INLINE unsigned long long read8BE(unsigned char const** ppSrc)
+{
+    unsigned long long result;
+
+    result = (unsigned long long) *(*ppSrc)++ << 56;
+    result |= (unsigned long long) *(*ppSrc)++ << 48;
+    result |= (unsigned long long) *(*ppSrc)++ << 40;
+    result |= (unsigned long long) *(*ppSrc)++ << 32;
+    result |= (unsigned long long) *(*ppSrc)++ << 24;
+    result |= (unsigned long long) *(*ppSrc)++ << 16;
+    result |= (unsigned long long) *(*ppSrc)++ << 8;
+    result |= (unsigned long long) *(*ppSrc)++;
+
+    return result;
+}
+
+/*
+ * Grab 2 little-endian bytes and advance the data pointer.
+ */
+INLINE unsigned short read2LE(unsigned char const** ppSrc)
+{
+    unsigned short result;
+
+    result = *(*ppSrc)++;
+    result |= *(*ppSrc)++ << 8;
+
+    return result;
+}
+
+/*
+ * Grab 4 little-endian bytes and advance the data pointer.
+ */
+INLINE unsigned int read4LE(unsigned char const** ppSrc)
+{
+    unsigned int result;
+
+    result = *(*ppSrc)++;
+    result |= *(*ppSrc)++ << 8;
+    result |= *(*ppSrc)++ << 16;
+    result |= *(*ppSrc)++ << 24;
+
+    return result;
+}
+
+/*
+ * Get 8 little-endian bytes.
+ */
+INLINE unsigned long long read8LE(unsigned char const** ppSrc)
+{
+    unsigned long long result;
+
+    result = (unsigned long long) *(*ppSrc)++;
+    result |= (unsigned long long) *(*ppSrc)++ << 8;
+    result |= (unsigned long long) *(*ppSrc)++ << 16;
+    result |= (unsigned long long) *(*ppSrc)++ << 24;
+    result |= (unsigned long long) *(*ppSrc)++ << 32;
+    result |= (unsigned long long) *(*ppSrc)++ << 40;
+    result |= (unsigned long long) *(*ppSrc)++ << 48;
+    result |= (unsigned long long) *(*ppSrc)++ << 56;
+
+    return result;
+}
+
+/*
+ * Skip over a UTF-8 string.
+ */
+INLINE void skipUtf8String(unsigned char const** ppSrc)
+{
+    unsigned int length = read4BE(ppSrc);
+
+    (*ppSrc) += length;
+}
+
+/*
+ * Read a UTF-8 string into a fixed-size buffer, and null-terminate it.
+ *
+ * Returns the length of the original string.
+ */
+INLINE int readUtf8String(unsigned char const** ppSrc, char* buf, size_t bufLen)
+{
+    unsigned int length = read4BE(ppSrc);
+    size_t copyLen = (length < bufLen) ? length : bufLen-1;
+
+    memcpy(buf, *ppSrc, copyLen);
+    buf[copyLen] = '\0';
+
+    (*ppSrc) += length;
+    return length;
+}
+
+/*
+ * Read a UTF-8 string into newly-allocated storage, and null-terminate it.
+ *
+ * Returns the string and its length.  (The latter is probably unnecessary
+ * for the way we're using UTF8.)
+ */
+INLINE char* readNewUtf8String(unsigned char const** ppSrc, size_t* pLength)
+{
+    unsigned int length = read4BE(ppSrc);
+    char* buf;
+
+    buf = (char*) malloc(length+1);
+
+    memcpy(buf, *ppSrc, length);
+    buf[length] = '\0';
+
+    (*ppSrc) += length;
+
+    *pLength = length;
+    return buf;
+}
+
+
+/*
+ * Set 1 byte.  (Included to make the code more legible.)
+ */
+INLINE void set1(unsigned char* buf, unsigned char val)
+{
+    *buf = (unsigned char)(val);
+}
+
+/*
+ * Set 2 big-endian bytes.
+ */
+INLINE void set2BE(unsigned char* buf, unsigned short val)
+{
+    *buf++ = (unsigned char)(val >> 8);
+    *buf = (unsigned char)(val);
+}
+
+/*
+ * Set 4 big-endian bytes.
+ */
+INLINE void set4BE(unsigned char* buf, unsigned int val)
+{
+    *buf++ = (unsigned char)(val >> 24);
+    *buf++ = (unsigned char)(val >> 16);
+    *buf++ = (unsigned char)(val >> 8);
+    *buf = (unsigned char)(val);
+}
+
+/*
+ * Set 8 big-endian bytes.
+ */
+INLINE void set8BE(unsigned char* buf, unsigned long long val)
+{
+    *buf++ = (unsigned char)(val >> 56);
+    *buf++ = (unsigned char)(val >> 48);
+    *buf++ = (unsigned char)(val >> 40);
+    *buf++ = (unsigned char)(val >> 32);
+    *buf++ = (unsigned char)(val >> 24);
+    *buf++ = (unsigned char)(val >> 16);
+    *buf++ = (unsigned char)(val >> 8);
+    *buf = (unsigned char)(val);
+}
+
+/*
+ * Set 2 little-endian bytes.
+ */
+INLINE void set2LE(unsigned char* buf, unsigned short val)
+{
+    *buf++ = (unsigned char)(val);
+    *buf = (unsigned char)(val >> 8);
+}
+
+/*
+ * Set 4 little-endian bytes.
+ */
+INLINE void set4LE(unsigned char* buf, unsigned int val)
+{
+    *buf++ = (unsigned char)(val);
+    *buf++ = (unsigned char)(val >> 8);
+    *buf++ = (unsigned char)(val >> 16);
+    *buf = (unsigned char)(val >> 24);
+}
+
+/*
+ * Set 8 little-endian bytes.
+ */
+INLINE void set8LE(unsigned char* buf, unsigned long long val)
+{
+    *buf++ = (unsigned char)(val);
+    *buf++ = (unsigned char)(val >> 8);
+    *buf++ = (unsigned char)(val >> 16);
+    *buf++ = (unsigned char)(val >> 24);
+    *buf++ = (unsigned char)(val >> 32);
+    *buf++ = (unsigned char)(val >> 40);
+    *buf++ = (unsigned char)(val >> 48);
+    *buf = (unsigned char)(val >> 56);
+}
+
+/*
+ * Stuff a UTF-8 string into the buffer.
+ */
+INLINE void setUtf8String(unsigned char* buf, const unsigned char* str)
+{
+    unsigned int strLen = strlen((const char*)str);
+
+    set4BE(buf, strLen);
+    memcpy(buf + sizeof(unsigned int), str, strLen);
+}
+
+#endif /*_MINZIP_BITS*/