github.com/llvm-mirror/llgo@v0.0.0-20190322182713-bf6f0a60fce1/third_party/gofrontend/libgo/runtime/go-construct-map.c (about)

     1  /* go-construct-map.c -- construct a map from an initializer.
     2  
     3     Copyright 2009 The Go Authors. All rights reserved.
     4     Use of this source code is governed by a BSD-style
     5     license that can be found in the LICENSE file.  */
     6  
     7  #include <stddef.h>
     8  #include <stdint.h>
     9  #include <stdlib.h>
    10  
    11  #include "runtime.h"
    12  #include "map.h"
    13  
    14  struct __go_map *
    15  __go_construct_map (const struct __go_map_descriptor *descriptor,
    16  		    uintptr_t count, uintptr_t entry_size,
    17  		    uintptr_t val_offset, uintptr_t val_size,
    18  		    const void *ventries)
    19  {
    20    struct __go_map *ret;
    21    const unsigned char *entries;
    22    uintptr_t i;
    23  
    24    ret = __go_new_map (descriptor, count);
    25  
    26    entries = (const unsigned char *) ventries;
    27    for (i = 0; i < count; ++i)
    28      {
    29        void *val = __go_map_index (ret, entries, 1);
    30        __builtin_memcpy (val, entries + val_offset, val_size);
    31        entries += entry_size;
    32      }
    33  
    34    return ret;
    35  }