Add 'neozip/' from commit 'c2712b8a345191f6ed79558c089777df94590087'

git-subtree-dir: neozip
git-subtree-mainline: b1e34e861b5d732afe828d58aad2c638135061fd
git-subtree-split: c2712b8a345191f6ed79558c089777df94590087

1 files changed, 151 insertions, 0 deletions

diff --git a/neozip/zutil.c b/neozip/zutil.c
new file mode 100644
index 0000000000..402862ffb0
--- /dev/null
+++ b/neozip/zutil.c
@@ -0,0 +1,151 @@
+/* zutil.c -- target dependent utility functions for the compression library
+ * Copyright (C) 1995-2017 Jean-loup Gailly
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#include "zbuild.h"
+#include "zutil_p.h"
+#include "zutil.h"
+
+z_const char * const PREFIX(z_errmsg)[10] = {
+    (z_const char *)"need dictionary",     /* Z_NEED_DICT       2  */
+    (z_const char *)"stream end",          /* Z_STREAM_END      1  */
+    (z_const char *)"",                    /* Z_OK              0  */
+    (z_const char *)"file error",          /* Z_ERRNO         (-1) */
+    (z_const char *)"stream error",        /* Z_STREAM_ERROR  (-2) */
+    (z_const char *)"data error",          /* Z_DATA_ERROR    (-3) */
+    (z_const char *)"insufficient memory", /* Z_MEM_ERROR     (-4) */
+    (z_const char *)"buffer error",        /* Z_BUF_ERROR     (-5) */
+    (z_const char *)"incompatible version",/* Z_VERSION_ERROR (-6) */
+    (z_const char *)""
+};
+
+const char PREFIX3(vstring)[] =
+    " zlib-ng 2.3.90 devel";
+
+#ifdef ZLIB_COMPAT
+const char * Z_EXPORT zlibVersion(void) {
+    return ZLIB_VERSION;
+}
+#else
+const char * Z_EXPORT zlibng_version(void) {
+    return ZLIBNG_VERSION;
+}
+#endif
+
+unsigned long Z_EXPORT PREFIX(zlibCompileFlags)(void) {
+    unsigned long flags;
+
+    flags = 0;
+    switch (sizeof(unsigned int)) {
+    case 2:     break;
+    case 4:     flags += 1;     break;
+    case 8:     flags += 2;     break;
+    default:    flags += 3;
+    }
+    switch (sizeof(unsigned long)) {
+    case 2:     break;
+    case 4:     flags += 1 << 2;        break;
+    case 8:     flags += 2 << 2;        break;
+    default:    flags += 3 << 2;
+    }
+    switch (sizeof(void *)) {
+    case 2:     break;
+    case 4:     flags += 1 << 4;        break;
+    case 8:     flags += 2 << 4;        break;
+    default:    flags += 3 << 4;
+    }
+    switch (sizeof(z_off_t)) {
+    case 2:     break;
+    case 4:     flags += 1 << 6;        break;
+    case 8:     flags += 2 << 6;        break;
+    default:    flags += 3 << 6;
+    }
+#ifdef ZLIB_DEBUG
+    flags += 1 << 8;
+#endif
+#ifdef ZLIB_WINAPI
+    flags += 1 << 10;
+#endif
+    /* Bit 13 reserved for DYNAMIC_CRC_TABLE */
+#ifdef NO_GZCOMPRESS
+    flags += 1L << 16;
+#endif
+#ifdef NO_GZIP
+    flags += 1L << 17;
+#endif
+#ifdef PKZIP_BUG_WORKAROUND
+    flags += 1L << 20;
+#endif
+    return flags;
+}
+
+#ifdef ZLIB_DEBUG
+#  include <stdlib.h>
+#  ifndef verbose
+#    define verbose 0
+#  endif
+int Z_INTERNAL z_verbose = verbose;
+
+void Z_INTERNAL z_error(const char *m) {
+    fprintf(stderr, "%s\n", m);
+    exit(1);
+}
+#endif
+
+/* exported to allow conversion of error code to string for compress() and
+ * uncompress()
+ */
+const char * Z_EXPORT PREFIX(zError)(z_int32_t err) {
+    return ERR_MSG(err);
+}
+
+// Zlib-ng's default alloc/free implementation, used unless
+// application supplies its own alloc/free functions.
+void Z_INTERNAL *PREFIX(zcalloc)(void *opaque, unsigned items, unsigned size) {
+    Z_UNUSED(opaque);
+    return zng_alloc((size_t)items * (size_t)size);
+}
+
+void Z_INTERNAL PREFIX(zcfree)(void *opaque, void *ptr) {
+    Z_UNUSED(opaque);
+    zng_free(ptr);
+}
+
+/* Provide aligned allocations, only used by gz* code */
+void Z_INTERNAL *zng_alloc_aligned(unsigned size, unsigned align) {
+    uintptr_t return_ptr, original_ptr, align_diff;
+    uint32_t alloc_size;
+    void *ptr;
+
+    /* Allocate enough memory for proper alignment and to store the original memory pointer */
+    alloc_size = sizeof(void *) + size + align;
+    ptr = zng_alloc(alloc_size);
+    if (!ptr)
+        return NULL;
+
+    /* Calculate return pointer address with space enough to store original pointer */
+    align_diff = ALIGN_DIFF(ptr, align);
+    return_ptr = (uintptr_t)ptr + align_diff;
+    if (align_diff < sizeof(void *))
+        return_ptr += align;
+
+    /* Store the original pointer for free() */
+    original_ptr = return_ptr - sizeof(void *);
+    memcpy((void *)original_ptr, &ptr, sizeof(void *));
+
+    /* Return properly aligned pointer in allocation */
+    return (void *)return_ptr;
+}
+
+void Z_INTERNAL zng_free_aligned(void *ptr) {
+    if (!ptr)
+        return;
+
+    /* Calculate offset to original memory allocation pointer */
+    void *original_ptr = (void *)((uintptr_t)ptr - sizeof(void *));
+    void *free_ptr = *(void **)original_ptr;
+
+    /* Free original memory allocation */
+    zng_free(free_ptr);
+}