YAZ  5.23.1
options.c
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1 /* This file is part of the YAZ toolkit.
2  * Copyright (C) Index Data
3  * See the file LICENSE for details.
4  */
9 #if HAVE_CONFIG_H
10 #include <config.h>
11 #endif
12 
13 #include <stdlib.h>
14 #include <string.h>
15 #include <yaz/options.h>
16 
17 static int arg_no = 1;
18 static size_t arg_off = 0;
19 static int eof_options = 0;
20 
21 int options(const char *desc, char **argv, int argc, char **arg)
22 {
23  const char *opt_buf = 0;
24  size_t i = 0;
25  int ch = 0;
26 
27  if (arg_no >= argc)
28  return YAZ_OPTIONS_EOF;
29  if (arg_off == 0)
30  {
31  while (argv[arg_no][0] == '\0')
32  {
33  arg_no++;
34  if (arg_no >= argc)
35  return YAZ_OPTIONS_EOF;
36  }
37  if (argv[arg_no][0] != '-' || argv[arg_no][1] == '\0' || eof_options)
38  {
39  *arg = argv[arg_no++];
40  return 0;
41  }
42  arg_off++; /* skip - */
43  }
44  /* we're in option mode */
45  if (argv[arg_no][1] == '-')
46  { /* long opt */
47  if (argv[arg_no][2] == '\0') /* -- : end of options */
48  {
49  eof_options = 1;
50  arg_off = 0;
51  ++arg_no;
52  if (arg_no >= argc)
53  return YAZ_OPTIONS_EOF;
54  *arg = argv[arg_no++];
55  return 0;
56  }
57  opt_buf = argv[arg_no]+2;
58  arg_off = strlen(argv[arg_no]);
59  }
60  else
61  { /* single char opt */
62  ch = argv[arg_no][arg_off++];
63  }
64  while (desc[i])
65  {
66  int desc_char = desc[i++];
67  int type = 0;
68  while (desc[i] == '{')
69  {
70  size_t i0 = ++i;
71  while (desc[i] && desc[i] != '}')
72  i++;
73  if (opt_buf && (i - i0) == strlen(opt_buf) &&
74  memcmp(opt_buf, desc+i0, i - i0) == 0)
75  ch = desc_char;
76  if (desc[i])
77  i++;
78  }
79  if (desc[i] == ':')
80  { /* option with string argument */
81  type = desc[i++];
82  }
83  if (desc_char == ch)
84  {
85  if (type) /* option with argument */
86  {
87  if (argv[arg_no][arg_off])
88  {
89  *arg = argv[arg_no]+arg_off;
90  arg_no++;
91  arg_off = 0;
92  }
93  else
94  {
95  arg_no++;
96  arg_off = 0;
97  if (arg_no < argc)
98  *arg = argv[arg_no++];
99  else
100  *arg = "";
101  }
102  }
103  else /* option with no argument */
104  {
105  if (!argv[arg_no][arg_off])
106  {
107  arg_off = 0;
108  arg_no++;
109  }
110  }
111  return ch;
112  }
113  }
114  *arg = argv[arg_no]+arg_off-1;
115  arg_no = arg_no + 1;
116  arg_off = 0;
117  return YAZ_OPTIONS_ERROR;
118 }
119 /*
120  * Local variables:
121  * c-basic-offset: 4
122  * c-file-style: "Stroustrup"
123  * indent-tabs-mode: nil
124  * End:
125  * vim: shiftwidth=4 tabstop=8 expandtab
126  */
127 
static int arg_no
Definition: options.c:17
enum l_file_type type
Definition: log.c:45
static size_t arg_off
Definition: options.c:18
int options(const char *desc, char **argv, int argc, char **arg)
command-line options parsing for main
Definition: options.c:21
static int eof_options
Definition: options.c:19
#define YAZ_OPTIONS_ERROR
Definition: options.h:64
Header for command line options parsing utilities.
#define YAZ_OPTIONS_EOF
Definition: options.h:65