Adding upstream version 8.32.upstream/8.32upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 331 insertions, 0 deletions

diff --git a/lib/argmatch.h b/lib/argmatch.h
new file mode 100644
index 0000000..daa0fdb
--- /dev/null
+++ b/lib/argmatch.h
@@ -0,0 +1,331 @@
+/* argmatch.h -- definitions and prototypes for argmatch.c
+
+   Copyright (C) 1990, 1998-1999, 2001-2002, 2004-2005, 2009-2020 Free Software
+   Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by David MacKenzie <djm@ai.mit.edu>
+   Modified by Akim Demaille <demaille@inf.enst.fr> */
+
+#ifndef ARGMATCH_H_
+# define ARGMATCH_H_ 1
+
+# include <limits.h>
+# include <stdbool.h>
+# include <stddef.h>
+# include <stdio.h>
+# include <string.h> /* memcmp */
+
+# include "gettext.h"
+# include "quote.h"
+# include "verify.h"
+
+# ifdef  __cplusplus
+extern "C" {
+# endif
+
+# define ARRAY_CARDINALITY(Array) (sizeof (Array) / sizeof *(Array))
+
+/* Assert there are as many real arguments as there are values
+   (argument list ends with a NULL guard).  */
+
+# define ARGMATCH_VERIFY(Arglist, Vallist) \
+    verify (ARRAY_CARDINALITY (Arglist) == ARRAY_CARDINALITY (Vallist) + 1)
+
+/* Return the index of the element of ARGLIST (NULL terminated) that
+   matches with ARG.  If VALLIST is not NULL, then use it to resolve
+   false ambiguities (i.e., different matches of ARG but corresponding
+   to the same values in VALLIST).  */
+
+ptrdiff_t argmatch (char const *arg, char const *const *arglist,
+                    void const *vallist, size_t valsize) _GL_ATTRIBUTE_PURE;
+
+# define ARGMATCH(Arg, Arglist, Vallist) \
+  argmatch (Arg, Arglist, (void const *) (Vallist), sizeof *(Vallist))
+
+/* xargmatch calls this function when it fails.  This function should not
+   return.  By default, this is a function that calls ARGMATCH_DIE which
+   in turn defaults to 'exit (exit_failure)'.  */
+typedef void (*argmatch_exit_fn) (void);
+extern argmatch_exit_fn argmatch_die;
+
+/* Report on stderr why argmatch failed.  Report correct values. */
+
+void argmatch_invalid (char const *context, char const *value,
+                       ptrdiff_t problem);
+
+/* Left for compatibility with the old name invalid_arg */
+
+# define invalid_arg(Context, Value, Problem) \
+  argmatch_invalid (Context, Value, Problem)
+
+
+
+/* Report on stderr the list of possible arguments.  */
+
+void argmatch_valid (char const *const *arglist,
+                     void const *vallist, size_t valsize);
+
+# define ARGMATCH_VALID(Arglist, Vallist) \
+  argmatch_valid (Arglist, (void const *) (Vallist), sizeof *(Vallist))
+
+
+
+/* Same as argmatch, but upon failure, report an explanation of the
+   failure, and exit using the function EXIT_FN. */
+
+ptrdiff_t __xargmatch_internal (char const *context,
+                                char const *arg, char const *const *arglist,
+                                void const *vallist, size_t valsize,
+                                argmatch_exit_fn exit_fn);
+
+/* Programmer friendly interface to __xargmatch_internal. */
+
+# define XARGMATCH(Context, Arg, Arglist, Vallist)              \
+  ((Vallist) [__xargmatch_internal (Context, Arg, Arglist,      \
+                                    (void const *) (Vallist),   \
+                                    sizeof *(Vallist),          \
+                                    argmatch_die)])
+
+/* Convert a value into a corresponding argument. */
+
+char const *argmatch_to_argument (void const *value,
+                                  char const *const *arglist,
+                                  void const *vallist, size_t valsize)
+  _GL_ATTRIBUTE_PURE;
+
+# define ARGMATCH_TO_ARGUMENT(Value, Arglist, Vallist)                  \
+  argmatch_to_argument (Value, Arglist,                                 \
+                        (void const *) (Vallist), sizeof *(Vallist))
+
+# define ARGMATCH_DEFINE_GROUP(Name, Type)                              \
+  /* The type of the values of this group.  */                          \
+  typedef Type argmatch_##Name##_type;                                  \
+                                                                        \
+  /* The size of the type of the values of this group. */               \
+  enum argmatch_##Name##_size_enum                                      \
+  {                                                                     \
+    argmatch_##Name##_size = sizeof (argmatch_##Name##_type)            \
+  };                                                                    \
+                                                                        \
+  /* Argument mapping of this group.  */                                \
+  typedef struct                                                        \
+  {                                                                     \
+    /* Argument (e.g., "simple").  */                                   \
+    const char *arg;                                                    \
+    /* Value (e.g., simple_backups).  */                                \
+    const argmatch_##Name##_type val;                                   \
+  } argmatch_##Name##_arg;                                              \
+                                                                        \
+  /* Documentation of this group.  */                                   \
+  typedef struct                                                        \
+  {                                                                     \
+    /* Argument (e.g., "simple").  */                                   \
+    const char *arg;                                                    \
+    /* Documentation (e.g., N_("always make simple backups")).  */      \
+    const char *doc;                                                    \
+  } argmatch_##Name##_doc;                                              \
+                                                                        \
+  /* All the features of an argmatch group.  */                         \
+  typedef struct                                                        \
+  {                                                                     \
+    const argmatch_##Name##_arg* args;                                  \
+    const argmatch_##Name##_doc* docs;                                  \
+                                                                        \
+    /* Printed before the usage message.  */                            \
+    const char *doc_pre;                                                \
+    /* Printed after the usage message.  */                             \
+    const char *doc_post;                                               \
+  } argmatch_##Name##_group_type;                                       \
+                                                                        \
+  /* The structure the user must build.  */                             \
+  extern const argmatch_##Name##_group_type argmatch_##Name##_group;    \
+                                                                        \
+  /* Print the documentation of this group.  */                         \
+  void argmatch_##Name##_usage (FILE *out);                             \
+                                                                        \
+  /* If nonnegative, the index I of ARG in ARGS, i.e,                   \
+     ARGS[I] == ARG.                                                    \
+     Return -1 for invalid argument, -2 for ambiguous argument. */      \
+  ptrdiff_t argmatch_##Name##_choice (const char *arg);                 \
+                                                                        \
+  /* A pointer to the corresponding value if it exists, or              \
+     report an error and exit with failure if the argument was          \
+     not recognized. */                                                 \
+  const argmatch_##Name##_type*                                         \
+  argmatch_##Name##_value (const char *context, const char *arg);       \
+                                                                        \
+  /* The first argument in ARGS that matches this value, or NULL.  */   \
+  const char *                                                          \
+  argmatch_##Name##_argument (const argmatch_##Name##_type *val);       \
+                                                                        \
+  ptrdiff_t                                                             \
+  argmatch_##Name##_choice (const char *arg)                            \
+  {                                                                     \
+    const argmatch_##Name##_group_type *g = &argmatch_##Name##_group;   \
+    size_t size = argmatch_##Name##_size;                               \
+    ptrdiff_t res = -1;      /* Index of first nonexact match.  */      \
+    bool ambiguous = false;  /* Whether multiple nonexact match(es). */ \
+    size_t arglen = strlen (arg);                                       \
+                                                                        \
+    /* Test all elements for either exact match or abbreviated          \
+       matches.  */                                                     \
+    for (size_t i = 0; g->args[i].arg; i++)                             \
+      if (!strncmp (g->args[i].arg, arg, arglen))                       \
+        {                                                               \
+          if (strlen (g->args[i].arg) == arglen)                        \
+            /* Exact match found.  */                                   \
+            return i;                                                   \
+          else if (res == -1)                                           \
+            /* First nonexact match found.  */                          \
+            res = i;                                                    \
+          else if (memcmp (&g->args[res].val, &g->args[i].val, size))   \
+            /* Second nonexact match found.  */                         \
+            /* There is a real ambiguity, or we could not               \
+               disambiguate. */                                         \
+            ambiguous = true;                                           \
+        }                                                               \
+    return ambiguous ? -2 : res;                                        \
+  }                                                                     \
+                                                                        \
+  const char *                                                          \
+  argmatch_##Name##_argument (const argmatch_##Name##_type *val)        \
+  {                                                                     \
+    const argmatch_##Name##_group_type *g = &argmatch_##Name##_group;   \
+    size_t size = argmatch_##Name##_size;                               \
+    for (size_t i = 0; g->args[i].arg; i++)                             \
+      if (!memcmp (val, &g->args[i].val, size))                         \
+        return g->args[i].arg;                                          \
+    return NULL;                                                        \
+  }                                                                     \
+                                                                        \
+  /* List the valid values of this group. */                            \
+  static void                                                           \
+  argmatch_##Name##_valid (FILE *out)                                   \
+  {                                                                     \
+    const argmatch_##Name##_group_type *g = &argmatch_##Name##_group;   \
+    size_t size = argmatch_##Name##_size;                               \
+                                                                        \
+    /* Try to put synonyms on the same line.  Synonyms are expected     \
+       to follow each other. */                                         \
+    fputs (gettext ("Valid arguments are:"), out);                      \
+    for (int i = 0; g->args[i].arg; i++)                                \
+      if (i == 0                                                        \
+          || memcmp (&g->args[i-1].val, &g->args[i].val, size))         \
+        fprintf (out, "\n  - %s", quote (g->args[i].arg));              \
+      else                                                              \
+        fprintf (out, ", %s", quote (g->args[i].arg));                  \
+    putc ('\n', out);                                                   \
+  }                                                                     \
+                                                                        \
+  const argmatch_##Name##_type*                                         \
+  argmatch_##Name##_value (const char *context, const char *arg)        \
+  {                                                                     \
+    const argmatch_##Name##_group_type *g = &argmatch_##Name##_group;   \
+    ptrdiff_t res = argmatch_##Name##_choice (arg);                     \
+    if (res < 0)                                                        \
+      {                                                                 \
+        argmatch_invalid (context, arg, res);                           \
+        argmatch_##Name##_valid (stderr);                               \
+        argmatch_die ();                                                \
+      }                                                                 \
+    return &g->args[res].val;                                           \
+  }                                                                     \
+                                                                        \
+  /* The column in which the documentation is displayed.                \
+     The leftmost possible, but no more than 20. */                     \
+  static int                                                            \
+  argmatch_##Name##_doc_col (void)                                      \
+  {                                                                     \
+    const argmatch_##Name##_group_type *g = &argmatch_##Name##_group;   \
+    size_t size = argmatch_##Name##_size;                               \
+    int res = 0;                                                        \
+    for (int i = 0; g->docs[i].arg; ++i)                                \
+      {                                                                 \
+        int col = 4;                                                    \
+        int ival = argmatch_##Name##_choice (g->docs[i].arg);           \
+        if (ival < 0)                                                   \
+          /* Pseudo argument, display it. */                            \
+          col += strlen (g->docs[i].arg);                               \
+        else                                                            \
+          /* Genuine argument, display it with its synonyms. */         \
+          for (int j = 0; g->args[j].arg; ++j)                          \
+            if (! memcmp (&g->args[ival].val, &g->args[j].val, size))   \
+              col += (col == 4 ? 0 : 2) + strlen (g->args[j].arg);      \
+        if (res <= col)                                                 \
+          res = col <= 20 ? col : 20;                                   \
+      }                                                                 \
+    return res ? res : 20;                                              \
+  }                                                                     \
+                                                                        \
+  void                                                                  \
+  argmatch_##Name##_usage (FILE *out)                                   \
+  {                                                                     \
+    const argmatch_##Name##_group_type *g = &argmatch_##Name##_group;   \
+    size_t size = argmatch_##Name##_size;                               \
+    /* Width of the screen.  Help2man does not seem to support          \
+       arguments on several lines, so in that case pretend a very       \
+       large width. */                                                  \
+    const int screen_width = getenv ("HELP2MAN") ? INT_MAX : 80;        \
+    if (g->doc_pre)                                                     \
+      fprintf (out, "%s\n", gettext (g->doc_pre));                      \
+    int doc_col = argmatch_##Name##_doc_col ();                         \
+    for (int i = 0; g->docs[i].arg; ++i)                                \
+      {                                                                 \
+        int col = 0;                                                    \
+        bool first = true;                                              \
+        int ival = argmatch_##Name##_choice (g->docs[i].arg);           \
+        if (ival < 0)                                                   \
+          /* Pseudo argument, display it. */                            \
+          col += fprintf (out,  "  %s", g->docs[i].arg);                \
+        else                                                            \
+          /* Genuine argument, display it with its synonyms. */         \
+          for (int j = 0; g->args[j].arg; ++j)                          \
+            if (! memcmp (&g->args[ival].val, &g->args[j].val, size))   \
+              {                                                         \
+                if (!first                                              \
+                    && screen_width < col + 2 + strlen (g->args[j].arg)) \
+                  {                                                     \
+                    fprintf (out, ",\n");                               \
+                    col = 0;                                            \
+                    first = true;                                       \
+                  }                                                     \
+                if (first)                                              \
+                  {                                                     \
+                    col += fprintf (out, " ");                          \
+                    first = false;                                      \
+                  }                                                     \
+                else                                                    \
+                  col += fprintf (out, ",");                            \
+                col += fprintf (out,  " %s", g->args[j].arg);           \
+              }                                                         \
+        /* The doc.  Separated by at least two spaces. */               \
+        if (doc_col < col + 2)                                          \
+          {                                                             \
+            fprintf (out, "\n");                                        \
+            col = 0;                                                    \
+          }                                                             \
+        fprintf (out, "%*s%s\n",                                        \
+                 doc_col - col, "", gettext (g->docs[i].doc));          \
+      }                                                                 \
+    if (g->doc_post)                                                    \
+      fprintf (out, "%s\n", gettext (g->doc_post));                     \
+  }
+
+# ifdef  __cplusplus
+}
+# endif
+
+#endif /* ARGMATCH_H_ */