github.com/golang/gofrontend@v0.0.0-20240429183944-60f985a78526/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  
    13  extern void *makemap (const struct maptype *, intgo hint, void *)
    14    __asm__ (GOSYM_PREFIX "runtime.makemap");
    15  
    16  extern void *mapassign (const struct maptype *, void *hmap, const void *key)
    17    __asm__ (GOSYM_PREFIX "runtime.mapassign");
    18  
    19  void *
    20  __go_construct_map (const struct maptype *type, uintptr_t count,
    21  		    uintptr_t entry_size, uintptr_t val_offset,
    22  		    const void *ventries)
    23  {
    24    void *ret;
    25    const unsigned char *entries;
    26    uintptr_t i;
    27    void *p;
    28  
    29    ret = makemap(type, (intgo) count, NULL);
    30  
    31    entries = (const unsigned char *) ventries;
    32    for (i = 0; i < count; ++i)
    33      {
    34        p = mapassign (type, ret, entries);
    35        typedmemmove (type->elem, p, entries + val_offset);
    36        entries += entry_size;
    37      }
    38  
    39    return ret;
    40  }