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Diffstat (limited to 'Build/source/libs/zziplib/zzip/fetch.c')
-rw-r--r--Build/source/libs/zziplib/zzip/fetch.c117
1 files changed, 117 insertions, 0 deletions
diff --git a/Build/source/libs/zziplib/zzip/fetch.c b/Build/source/libs/zziplib/zzip/fetch.c
new file mode 100644
index 00000000000..23be82376df
--- /dev/null
+++ b/Build/source/libs/zziplib/zzip/fetch.c
@@ -0,0 +1,117 @@
+#include <zzip/fetch.h>
+
+#if defined ZZIP_WORDS_BIGENDIAN && \
+ defined bswap_16 && defined bswap_32 && defined bswap_64
+# define __ZZIP_GET16(__p) bswap_16(*(uint16_t*)(__p))
+# define __ZZIP_GET32(__p) bswap_32(*(uint32_t*)(__p))
+# define __ZZIP_SET16(__p,__x) (*(uint16_t*)(__p) = bswap_16((uint16_t)(__x)))
+# define __ZZIP_SET32(__p,__x) (*(uint32_t*)(__p) = bswap_32((uint32_t)(__x)))
+# define __ZZIP_GET64(__p) bswap_64(*(zzip_off64_t*)(__p))
+# define __ZZIP_SET64(__p,__x) \
+ (*(zzip_off64_t*)(__p) = bswap_64((zzip_off64_t)(__x)))
+#endif
+
+/* ------------------------- fetch helpers --------------------------------- */
+
+/**
+ * Make 32 bit value in host byteorder from little-endian mapped octet-data
+ * (works also on machines which SIGBUS on misaligned data access (eg. 68000))
+ */
+uint32_t __zzip_get32(unsigned char * s)
+{
+#if defined __ZZIP_GET32
+ return __ZZIP_GET32(s);
+#else
+ return ((uint32_t)s[3] << 24) | ((uint32_t)s[2] << 16)
+ | ((uint32_t)s[1] << 8) | ((uint32_t)s[0]);
+#endif
+}
+
+/** => __zzip_get32
+ * This function does the same for a 16 bit value.
+ */
+uint16_t __zzip_get16(unsigned char * s)
+{
+#if defined __ZZIP_GET16
+ return __ZZIP_GET16(s);
+#else
+ return ((uint16_t)s[1] << 8) | ((uint16_t)s[0]);
+#endif
+}
+
+/** => __zzip_get32
+ * This function does the same for an off64_t value.
+ */
+uint64_t __zzip_get64(unsigned char * s)
+{
+#ifdef __GNUC__
+ register uint64_t v
+ = s[7]; v <<= 8;
+ v |= s[6]; v <<= 8;
+ v |= s[5]; v <<= 8;
+ v |= s[4]; v <<= 8;
+ v |= s[3]; v <<= 8;
+ v |= s[2]; v <<= 8;
+ v |= s[1]; v <<= 8;
+ v |= s[0]; return v;
+#else
+ return ((uint64_t)s[7] << 56) | ((uint64_t)s[6] << 48)
+ | ((uint64_t)s[5] << 40) | ((uint64_t)s[4] << 32)
+ | ((uint64_t)s[3] << 24) | ((uint64_t)s[2] << 16)
+ | ((uint64_t)s[1] << 8) | ((uint64_t)s[0]);
+#endif
+}
+
+/** => __zzip_get32
+ * This function pushes a 32bit value at the specified address
+ */
+void __zzip_set32(unsigned char * s, uint32_t v)
+{
+#if defined __ZZIP_SET32
+ return __ZZIP_SET32(s, v);
+#else
+ s[0] = (unsigned char) (v);
+ v >>= 8;
+ s[1] = (unsigned char) (v);
+ v >>= 8;
+ s[2] = (unsigned char) (v);
+ v >>= 8;
+ s[3] = (unsigned char) (v);
+#endif
+}
+
+/** => __zzip_get32
+ * This function does the same for a 16 bit value.
+ */
+void __zzip_set16(unsigned char * s, uint16_t v)
+{
+#if defined __ZZIP_SET16
+ return __ZZIP_SET16(s, v);
+#else
+ s[0] = (unsigned char) (v);
+ v >>= 8;
+ s[1] = (unsigned char) (v);
+#endif
+}
+
+/** => __zzip_get32
+ * This function pushes a off64_t value at the specified address
+ */
+void __zzip_set64(unsigned char * s, uint64_t v)
+{
+ s[0] = (unsigned char) (v);
+ v >>= 8;
+ s[1] = (unsigned char) (v);
+ v >>= 8;
+ s[2] = (unsigned char) (v);
+ v >>= 8;
+ s[3] = (unsigned char) (v);
+ v >>= 8;
+ s[4] = (unsigned char) (v);
+ v >>= 8;
+ s[5] = (unsigned char) (v);
+ v >>= 8;
+ s[6] = (unsigned char) (v);
+ v >>= 8;
+ s[7] = (unsigned char) (v);
+}