1/*---------------------------------------------------------------------------*
2 *  CommandLine.c  *
3 *                                                                           *
4 *  Copyright 2007, 2008 Nuance Communciations, Inc.                               *
5 *                                                                           *
6 *  Licensed under the Apache License, Version 2.0 (the 'License');          *
7 *  you may not use this file except in compliance with the License.         *
8 *                                                                           *
9 *  You may obtain a copy of the License at                                  *
10 *      http://www.apache.org/licenses/LICENSE-2.0                           *
11 *                                                                           *
12 *  Unless required by applicable law or agreed to in writing, software      *
13 *  distributed under the License is distributed on an 'AS IS' BASIS,        *
14 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
15 *  See the License for the specific language governing permissions and      *
16 *  limitations under the License.                                           *
17 *                                                                           *
18 *---------------------------------------------------------------------------*/
19
20#include "ESR_CommandLine.h"
21
22ESR_ReturnCode ESR_CommandLineGetValue(int argc, const LCHAR * argv[],
23                                       LCHAR* key, LCHAR* value, size_t* len)
24{
25  const LCHAR* lastKeyFound = NULL;
26
27  while (--argc > 0 && **++argv)
28  {
29    if (**argv != '-')
30    {
31      /* got value */
32      if (key == NULL)
33      {
34        /* but we don't have any key to associate it with */
35        continue;
36      }
37      else
38      {
39        if (lastKeyFound != NULL && LSTRCMP(lastKeyFound, key) == 0)
40        {
41          if (LSTRLEN(*argv) + 1 > *len)
42          {
43            *len = LSTRLEN(*argv) + 1;
44            return ESR_BUFFER_OVERFLOW;
45          }
46          *len = LSTRLEN(*argv) + 1;
47          LSTRCPY(value, *argv);
48          return ESR_SUCCESS;
49        }
50      }
51    }
52    else
53    {
54      /* got key */
55      if (lastKeyFound != NULL && LSTRCMP(lastKeyFound, key) == 0)
56      {
57        *len = 1;
58        LSTRCPY(value, L(""));
59        return ESR_SUCCESS;
60      }
61      lastKeyFound = *argv + 1;
62    }
63  }
64
65  /* Handle case where last argument is a key with no value */
66  if (lastKeyFound != NULL && LSTRCMP(lastKeyFound, key) == 0)
67  {
68    *len = 1;
69    LSTRCPY(value, L(""));
70    return ESR_SUCCESS;
71  }
72  return ESR_NO_MATCH_ERROR;
73}
74