libgo/runtime/go-print.c

   1 /* go-print.c -- support for the go print statement.
   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 <stdint.h>
   8 #include <stdio.h>
   9
  10 #include "array.h"
  11 #include "go-panic.h"
  12 #include "go-string.h"
  13 #include "interface.h"
  14
  15 /* This implements the various little functions which are called by
  16    the predeclared functions print/println/panic/panicln.  */
  17
  18 void
  19 __go_print_space ()
  20 {
  21   putchar (' ');
  22 }
  23
  24 void
  25 __go_print_nl ()
  26 {
  27   putchar ('\n');
  28 }
  29
  30 void
  31 __go_print_string (struct __go_string val)
  32 {
  33   printf ("%.*s", (int) val.__length, (const char *) val.__data);
  34 }
  35
  36 void
  37 __go_print_uint64 (uint64_t val)
  38 {
  39   printf ("%llu", (unsigned long long) val);
  40 }
  41
  42 void
  43 __go_print_int64 (int64_t val)
  44 {
  45   printf ("%lld", (long long) val);
  46 }
  47
  48 void
  49 __go_print_double (double val)
  50 {
  51   printf ("%.24g", val);
  52 }
  53
  54 void
  55 __go_print_complex (__complex double val)
  56 {
  57   printf ("(%.24g%s%.24gi)",
  58           __builtin_creal (val),
  59           (__builtin_cimag (val) >= 0 || __builtin_isnan (__builtin_cimag(val))
  60            ? "+"
  61            : ""),
  62           __builtin_cimag (val));
  63 }
  64
  65 void
  66 __go_print_bool (_Bool val)
  67 {
  68   fputs (val ? "true" : "false", stdout);
  69 }
  70
  71 void
  72 __go_print_pointer (void *val)
  73 {
  74   printf ("%p", val);
  75 }
  76
  77 void
  78 __go_print_empty_interface (struct __go_empty_interface e)
  79 {
  80   printf ("(%p,%p)", e.__type_descriptor, e.__object);
  81 }
  82
  83 void
  84 __go_print_interface (struct __go_interface i)
  85 {
  86   printf ("(%p,%p)", i.__methods, i.__object);
  87 }
  88
  89 void
  90 __go_print_slice (struct __go_open_array val)
  91 {
  92   printf ("[%d/%d]%p", val.__count, val.__capacity, val.__values);
  93 }