Initial commit

darknet-master/3rdparty/getopt/getopt.c

@@ -0,0 +1,498 @@
+#ifdef _MSC_VER
+#include "getopt.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef REPLACE_GETOPT
+int opterr = 1; /* if error message should be printed */
+int optind = 1; /* index into parent argv vector */
+int optopt = '?'; /* character checked for validity */
+#undef optreset /* see getopt.h */
+#define optreset __mingw_optreset
+int optreset; /* reset getopt */
+char* optarg; /* argument associated with option */
+#endif
+
+static void
+_vwarnx(const char* fmt, va_list ap)
+{
+  (void)fprintf(stderr, "%s: ", __progname);
+  if (fmt != NULL)
+    (void)vfprintf(stderr, fmt, ap);
+  (void)fprintf(stderr, "\n");
+}
+
+static void
+warnx(const char* fmt, ...)
+{
+  va_list ap;
+  va_start(ap, fmt);
+  _vwarnx(fmt, ap);
+  va_end(ap);
+}
+
+/*
+ * Compute the greatest common divisor of a and b.
+ */
+static int
+gcd(int a, int b)
+{
+  int c;
+
+  c = a % b;
+  while (c != 0) {
+    a = b;
+    b = c;
+    c = a % b;
+  }
+
+  return (b);
+}
+
+/*
+ * Exchange the block from nonopt_start to nonopt_end with the block
+ * from nonopt_end to opt_end (keeping the same order of arguments
+ * in each block).
+ */
+static void
+permute_args(int panonopt_start, int panonopt_end, int opt_end,
+    char* const* nargv)
+{
+  int cstart, cyclelen, i, j, ncycle, nnonopts, nopts, pos;
+  char* swap;
+
+  /*
+     * compute lengths of blocks and number and size of cycles
+     */
+  nnonopts = panonopt_end - panonopt_start;
+  nopts = opt_end - panonopt_end;
+  ncycle = gcd(nnonopts, nopts);
+  cyclelen = (opt_end - panonopt_start) / ncycle;
+
+  for (i = 0; i < ncycle; i++) {
+    cstart = panonopt_end + i;
+    pos = cstart;
+    for (j = 0; j < cyclelen; j++) {
+      if (pos >= panonopt_end)
+        pos -= nnonopts;
+      else
+        pos += nopts;
+      swap = nargv[pos];
+      /* LINTED const cast */
+      ((char**)nargv)[pos] = nargv[cstart];
+      /* LINTED const cast */
+      ((char**)nargv)[cstart] = swap;
+    }
+  }
+}
+
+#ifdef REPLACE_GETOPT
+/*
+ * getopt --
+ *    Parse argc/argv argument vector.
+ *
+ * [eventually this will replace the BSD getopt]
+ */
+int getopt(int nargc, char* const* nargv, const char* options)
+{
+
+  /*
+     * We don't pass FLAG_PERMUTE to getopt_internal() since
+     * the BSD getopt(3) (unlike GNU) has never done this.
+     *
+     * Furthermore, since many privileged programs call getopt()
+     * before dropping privileges it makes sense to keep things
+     * as simple (and bug-free) as possible.
+     */
+  return (getopt_internal(nargc, nargv, options, NULL, NULL, 0));
+}
+#endif /* REPLACE_GETOPT */
+
+//extern int getopt(int nargc, char * const *nargv, const char *options);
+
+#ifdef __cplusplus
+}
+#endif
+/*
+ * POSIX requires the `getopt' API to be specified in `unistd.h';
+ * thus, `unistd.h' includes this header.  However, we do not want
+ * to expose the `getopt_long' or `getopt_long_only' APIs, when
+ * included in this manner.  Thus, close the standard __GETOPT_H__
+ * declarations block, and open an additional __GETOPT_LONG_H__
+ * specific block, only when *not* __UNISTD_H_SOURCED__, in which
+ * to declare the extended API.
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct option /* specification for a long form option...    */
+{
+  const char* name; /* option name, without leading hyphens */
+  int has_arg; /* does it take an argument?        */
+  int* flag; /* where to save its status, or NULL    */
+  int val; /* its associated status value        */
+};
+
+enum /* permitted values for its `has_arg' field...    */
+{
+  no_argument = 0, /* option never takes an argument    */
+  required_argument, /* option always requires an argument    */
+  optional_argument /* option may take an argument        */
+};
+
+/*
+ * parse_long_options --
+ *    Parse long options in argc/argv argument vector.
+ * Returns -1 if short_too is set and the option does not match long_options.
+ */
+static int
+parse_long_options(char* const* nargv, const char* options,
+    const struct option* long_options, int* idx, int short_too)
+{
+  char *current_argv, *has_equal;
+  size_t current_argv_len;
+  int i, ambiguous, match;
+
+#define IDENTICAL_INTERPRETATION(_x, _y) \
+  (long_options[(_x)].has_arg == long_options[(_y)].has_arg && long_options[(_x)].flag == long_options[(_y)].flag && long_options[(_x)].val == long_options[(_y)].val)
+
+  current_argv = place;
+  match = -1;
+  ambiguous = 0;
+
+  optind++;
+
+  if ((has_equal = strchr(current_argv, '=')) != NULL) {
+    /* argument found (--option=arg) */
+    current_argv_len = has_equal - current_argv;
+    has_equal++;
+  } else
+    current_argv_len = strlen(current_argv);
+
+  for (i = 0; long_options[i].name; i++) {
+    /* find matching long option */
+    if (strncmp(current_argv, long_options[i].name,
+            current_argv_len))
+      continue;
+
+    if (strlen(long_options[i].name) == current_argv_len) {
+      /* exact match */
+      match = i;
+      ambiguous = 0;
+      break;
+    }
+    /*
+         * If this is a known short option, don't allow
+         * a partial match of a single character.
+         */
+    if (short_too && current_argv_len == 1)
+      continue;
+
+    if (match == -1) /* partial match */
+      match = i;
+    else if (!IDENTICAL_INTERPRETATION(i, match))
+      ambiguous = 1;
+  }
+  if (ambiguous) {
+    /* ambiguous abbreviation */
+    if (PRINT_ERROR)
+      warnx(ambig, (int)current_argv_len,
+          current_argv);
+    optopt = 0;
+    return (BADCH);
+  }
+  if (match != -1) { /* option found */
+    if (long_options[match].has_arg == no_argument
+        && has_equal) {
+      if (PRINT_ERROR)
+        warnx(noarg, (int)current_argv_len,
+            current_argv);
+      /*
+             * XXX: GNU sets optopt to val regardless of flag
+             */
+      if (long_options[match].flag == NULL)
+        optopt = long_options[match].val;
+      else
+        optopt = 0;
+      return (BADARG);
+    }
+    if (long_options[match].has_arg == required_argument || long_options[match].has_arg == optional_argument) {
+      if (has_equal)
+        optarg = has_equal;
+      else if (long_options[match].has_arg == required_argument) {
+        /*
+                 * optional argument doesn't use next nargv
+                 */
+        optarg = nargv[optind++];
+      }
+    }
+    if ((long_options[match].has_arg == required_argument)
+        && (optarg == NULL)) {
+      /*
+             * Missing argument; leading ':' indicates no error
+             * should be generated.
+             */
+      if (PRINT_ERROR)
+        warnx(recargstring,
+            current_argv);
+      /*
+             * XXX: GNU sets optopt to val regardless of flag
+             */
+      if (long_options[match].flag == NULL)
+        optopt = long_options[match].val;
+      else
+        optopt = 0;
+      --optind;
+      return (BADARG);
+    }
+  } else { /* unknown option */
+    if (short_too) {
+      --optind;
+      return (-1);
+    }
+    if (PRINT_ERROR)
+      warnx(illoptstring, current_argv);
+    optopt = 0;
+    return (BADCH);
+  }
+  if (idx)
+    *idx = match;
+  if (long_options[match].flag) {
+    *long_options[match].flag = long_options[match].val;
+    return (0);
+  } else
+    return (long_options[match].val);
+#undef IDENTICAL_INTERPRETATION
+}
+
+/*
+ * getopt_internal --
+ *    Parse argc/argv argument vector.  Called by user level routines.
+ */
+static int
+getopt_internal(int nargc, char* const* nargv, const char* options,
+    const struct option* long_options, int* idx, int flags)
+{
+  char* oli; /* option letter list index */
+  int optchar, short_too;
+  static int posixly_correct = -1;
+
+  if (options == NULL)
+    return (-1);
+
+  /*
+     * XXX Some GNU programs (like cvs) set optind to 0 instead of
+     * XXX using optreset.  Work around this braindamage.
+     */
+  if (optind == 0)
+    optind = optreset = 1;
+
+  /*
+     * Disable GNU extensions if POSIXLY_CORRECT is set or options
+     * string begins with a '+'.
+     *
+     * CV, 2009-12-14: Check POSIXLY_CORRECT anew if optind == 0 or
+     *                 optreset != 0 for GNU compatibility.
+     */
+  if (posixly_correct == -1 || optreset != 0)
+    posixly_correct = (getenv("POSIXLY_CORRECT") != NULL);
+  if (*options == '-')
+    flags |= FLAG_ALLARGS;
+  else if (posixly_correct || *options == '+')
+    flags &= ~FLAG_PERMUTE;
+  if (*options == '+' || *options == '-')
+    options++;
+
+  optarg = NULL;
+  if (optreset)
+    nonopt_start = nonopt_end = -1;
+start:
+  if (optreset || !*place) { /* update scanning pointer */
+    optreset = 0;
+    if (optind >= nargc) { /* end of argument vector */
+      place = EMSG;
+      if (nonopt_end != -1) {
+        /* do permutation, if we have to */
+        permute_args(nonopt_start, nonopt_end,
+            optind, nargv);
+        optind -= nonopt_end - nonopt_start;
+      } else if (nonopt_start != -1) {
+        /*
+                 * If we skipped non-options, set optind
+                 * to the first of them.
+                 */
+        optind = nonopt_start;
+      }
+      nonopt_start = nonopt_end = -1;
+      return (-1);
+    }
+    if (*(place = nargv[optind]) != '-' || (place[1] == '\0' && strchr(options, '-') == NULL)) {
+      place = EMSG; /* found non-option */
+      if (flags & FLAG_ALLARGS) {
+        /*
+                 * GNU extension:
+                 * return non-option as argument to option 1
+                 */
+        optarg = nargv[optind++];
+        return (INORDER);
+      }
+      if (!(flags & FLAG_PERMUTE)) {
+        /*
+                 * If no permutation wanted, stop parsing
+                 * at first non-option.
+                 */
+        return (-1);
+      }
+      /* do permutation */
+      if (nonopt_start == -1)
+        nonopt_start = optind;
+      else if (nonopt_end != -1) {
+        permute_args(nonopt_start, nonopt_end,
+            optind, nargv);
+        nonopt_start = optind - (nonopt_end - nonopt_start);
+        nonopt_end = -1;
+      }
+      optind++;
+      /* process next argument */
+      goto start;
+    }
+    if (nonopt_start != -1 && nonopt_end == -1)
+      nonopt_end = optind;
+
+    /*
+         * If we have "-" do nothing, if "--" we are done.
+         */
+    if (place[1] != '\0' && *++place == '-' && place[1] == '\0') {
+      optind++;
+      place = EMSG;
+      /*
+             * We found an option (--), so if we skipped
+             * non-options, we have to permute.
+             */
+      if (nonopt_end != -1) {
+        permute_args(nonopt_start, nonopt_end,
+            optind, nargv);
+        optind -= nonopt_end - nonopt_start;
+      }
+      nonopt_start = nonopt_end = -1;
+      return (-1);
+    }
+  }
+
+  /*
+     * Check long options if:
+     *  1) we were passed some
+     *  2) the arg is not just "-"
+     *  3) either the arg starts with -- we are getopt_long_only()
+     */
+  if (long_options != NULL && place != nargv[optind] && (*place == '-' || (flags & FLAG_LONGONLY))) {
+    short_too = 0;
+    if (*place == '-')
+      place++; /* --foo long option */
+    else if (*place != ':' && strchr(options, *place) != NULL)
+      short_too = 1; /* could be short option too */
+
+    optchar = parse_long_options(nargv, options, long_options,
+        idx, short_too);
+    if (optchar != -1) {
+      place = EMSG;
+      return (optchar);
+    }
+  }
+
+  if ((optchar = (int)*place++) == (int)':' || (optchar == (int)'-' && *place != '\0') || (oli = (char*)strchr(options, optchar)) == NULL) {
+    /*
+         * If the user specified "-" and  '-' isn't listed in
+         * options, return -1 (non-option) as per POSIX.
+         * Otherwise, it is an unknown option character (or ':').
+         */
+    if (optchar == (int)'-' && *place == '\0')
+      return (-1);
+    if (!*place)
+      ++optind;
+    if (PRINT_ERROR)
+      warnx(illoptchar, optchar);
+    optopt = optchar;
+    return (BADCH);
+  }
+  if (long_options != NULL && optchar == 'W' && oli[1] == ';') {
+    /* -W long-option */
+    if (*place) /* no space */
+      /* NOTHING */;
+    else if (++optind >= nargc) { /* no arg */
+      place = EMSG;
+      if (PRINT_ERROR)
+        warnx(recargchar, optchar);
+      optopt = optchar;
+      return (BADARG);
+    } else /* white space */
+      place = nargv[optind];
+    optchar = parse_long_options(nargv, options, long_options,
+        idx, 0);
+    place = EMSG;
+    return (optchar);
+  }
+  if (*++oli != ':') { /* doesn't take argument */
+    if (!*place)
+      ++optind;
+  } else { /* takes (optional) argument */
+    optarg = NULL;
+    if (*place) /* no white space */
+      optarg = place;
+    else if (oli[1] != ':') { /* arg not optional */
+      if (++optind >= nargc) { /* no arg */
+        place = EMSG;
+        if (PRINT_ERROR)
+          warnx(recargchar, optchar);
+        optopt = optchar;
+        return (BADARG);
+      } else
+        optarg = nargv[optind];
+    }
+    place = EMSG;
+    ++optind;
+  }
+  /* dump back option letter */
+  return (optchar);
+}
+
+/*
+ * getopt_long --
+ *    Parse argc/argv argument vector.
+ */
+int getopt_long(int nargc, char* const* nargv, const char* options,
+    const struct option* long_options, int* idx)
+{
+
+  return (getopt_internal(nargc, nargv, options, long_options, idx,
+      FLAG_PERMUTE));
+}
+
+/*
+ * getopt_long_only --
+ *    Parse argc/argv argument vector.
+ */
+int getopt_long_only(int nargc, char* const* nargv, const char* options,
+    const struct option* long_options, int* idx)
+{
+
+  return (getopt_internal(nargc, nargv, options, long_options, idx,
+      FLAG_PERMUTE | FLAG_LONGONLY));
+}
+
+//extern int getopt_long(int nargc, char * const *nargv, const char *options,
+//    const struct option *long_options, int *idx);
+//extern int getopt_long_only(int nargc, char * const *nargv, const char *options,
+//    const struct option *long_options, int *idx);
+/*
+ * Previous MinGW implementation had...
+ */
+
+#ifdef __cplusplus
+}
+#endif
+#endif