native_client/src/shared/platform/win/port_win.c at e52b0bd3f2fe17d520a02bb78f423ae4efd30641 · DaemonEngine/native_client · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
/*
 * Copyright 2008 The Native Client Authors. All rights reserved.
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

/*
 * Misc functions missing from windows.
 */
#include <stdio.h>
#include <string.h>

#include "native_client/src/include/portability.h"

#if ( DO_NOT_USE_FAST_ASSEMBLER_VERSION_FOR_FFS || defined(_WIN64) || !defined(_MSC_VER) )
int ffs(int x) {
  int r = 1;

  if (!x) {
    return 0;
  }
  if (!(x & 0xffff)) {
    /* case 1 */
    x >>= 16;
    r += 16;
  }
  if (!(x & 0xff)) {
    /* case 2 */
    x >>= 8;
    r += 8;
  }
  if (!(x & 0xf)) {
    /* case 3 */
    x >>= 4;
    r += 4;
  }
  if (!(x & 3)) {
    /* case 4 */
    x >>= 2;
    r += 2;
  }
  if (!(x & 1)) {
    /* case 5 */
    x >>= 1;
    r += 1;
  }

  return r;
}
#else
int  ffs(int v) {
  uint32_t rv;

  if (!v) return 0;
  __asm {
    bsf eax, v;
    mov rv, eax;
  }
  return rv + 1;
}
#endif


/*
 * Based on code by Hans Dietrich
 * see http://www.codeproject.com/KB/cpp/xgetopt.aspx
 */

char *optarg;  /* global argument pointer */
int optind = 0;  /* global argv index */

int getopt(int argc, char *argv[], const char *optstring) {
  char c, *cp;
  static char *next = NULL;
  if (optind == 0)
    next = NULL;

  optarg = NULL;

  if (next == NULL || *next == ('\0')) {
    if (optind == 0)
      optind++;

    if (optind >= argc ||
        argv[optind][0] != ('-') ||
        argv[optind][1] == ('\0')) {
      optarg = NULL;
      if (optind < argc)
        optarg = argv[optind];
      return EOF;
    }

    if (strcmp(argv[optind], ("--")) == 0) {
      optind++;
      optarg = NULL;
      if (optind < argc)
        optarg = argv[optind];
      return EOF;
    }

    next = argv[optind];
    next++;   /* skip past - */
    optind++;
  }

  c = *next++;
  cp = strchr(optstring, c);

  if (cp == NULL || c == (':'))
    return ('?');

  cp++;
  if (*cp == (':')) {
    if (*next != ('\0')) {
      optarg = next;
      next = NULL;
    } else if (optind < argc) {
      optarg = argv[optind];
      optind++;
    } else {
      return ('?');
    }
  }

  return c;
}