vendor: OpenCV 5.0.0 snapshot at 40738fb16ceddb5fb3fea747585f7ce6abb0605b

2026-08-22 00:10:33 +08:00
commit f7f077da11
6933 changed files with 2335208 additions and 0 deletions
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+/* zutil_p.h -- Private inline functions used internally in zlib-ng
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#ifndef ZUTIL_P_H
+#define ZUTIL_P_H
+
+#if defined(__APPLE__) || defined(HAVE_POSIX_MEMALIGN) || defined(HAVE_ALIGNED_ALLOC)
+#  include <stdlib.h>
+#elif defined(__FreeBSD__)
+#  include <stdlib.h>
+#  include <malloc_np.h>
+#else
+#  include <malloc.h>
+#endif
+
+/* Function to allocate 16 or 64-byte aligned memory */
+static inline void *zng_alloc(size_t size) {
+#ifdef HAVE_ALIGNED_ALLOC
+    /* Size must be a multiple of alignment */
+    size = (size + (64 - 1)) & ~(64 - 1);
+    return (void *)aligned_alloc(64, size);  /* Defined in C11 */
+#elif defined(HAVE_POSIX_MEMALIGN)
+    void *ptr;
+    return posix_memalign(&ptr, 64, size) ? NULL : ptr;
+#elif defined(_WIN32)
+    return (void *)_aligned_malloc(size, 64);
+#elif defined(__APPLE__)
+    /* Fallback for when posix_memalign and aligned_alloc are not available.
+     * On macOS, it always aligns to 16 bytes. */
+    return (void *)malloc(size);
+#else
+    return (void *)memalign(64, size);
+#endif
+}
+
+/* Function that can free aligned memory */
+static inline void zng_free(void *ptr) {
+#if defined(_WIN32)
+    _aligned_free(ptr);
+#else
+    free(ptr);
+#endif
+}
+
+/* Use memcpy instead of memcmp to avoid older compilers not converting memcmp calls to
+   unaligned comparisons when unaligned access is supported. */
+static inline int32_t zng_memcmp_2(const void *src0, const void *src1) {
+    uint16_t src0_cmp, src1_cmp;
+
+    memcpy(&src0_cmp, src0, sizeof(src0_cmp));
+    memcpy(&src1_cmp, src1, sizeof(src1_cmp));
+
+    return src0_cmp != src1_cmp;
+}
+
+static inline int32_t zng_memcmp_4(const void *src0, const void *src1) {
+    uint32_t src0_cmp, src1_cmp;
+
+    memcpy(&src0_cmp, src0, sizeof(src0_cmp));
+    memcpy(&src1_cmp, src1, sizeof(src1_cmp));
+
+    return src0_cmp != src1_cmp;
+}
+
+static inline int32_t zng_memcmp_8(const void *src0, const void *src1) {
+    uint64_t src0_cmp, src1_cmp;
+
+    memcpy(&src0_cmp, src0, sizeof(src0_cmp));
+    memcpy(&src1_cmp, src1, sizeof(src1_cmp));
+
+    return src0_cmp != src1_cmp;
+}
+
+#endif