2005-02-22 Simon Josefsson <jas@extundo.com>

	* iconvme.h, iconvme.c: New files, from libc.

diff --git a/lib/ChangeLog b/lib/ChangeLog
index 2b55302e2d5c743bd8bdb43143edddb39d33f453..c82fdf59f5518636ecd03016af5ec03e7aa15dab 100644 (file)
--- a/lib/ChangeLog
+++ b/lib/ChangeLog
@@ -1,3 +1,7 @@
+2005-02-22  Simon Josefsson  <jas@extundo.com>
+
+       * iconvme.h, iconvme.c: New files, from libc.
+
 2005-02-20  Neil Conway  <neilc@samurai.com>
 
        * xgethostname.c (xgethostname): Check for ENOMEM, which is

diff --git a/lib/iconvme.c b/lib/iconvme.c
new file mode 100644 (file)
index 0000000..6905b8b
--- /dev/null
+++ b/lib/iconvme.c
@@ -0,0 +1,165 @@
+/* Recode strings between character sets, using iconv.
+   Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1, 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 Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License along
+   with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+/* Get prototype. */
+#include "iconvme.h"
+
+/* Get malloc. */
+#include <stdlib.h>
+
+/* Get strcmp. */
+#include <string.h>
+
+/* Get errno. */
+#include <errno.h>
+
+#ifdef _LIBC
+# define HAVE_ICONV 1
+#else
+/* Get strdup. */
+# include "strdup.h"
+#endif
+
+#if HAVE_ICONV
+/* Get iconv etc. */
+# include <iconv.h>
+/* Get MB_LEN_MAX. */
+# include <limits.h>
+#endif
+
+/* Convert a zero-terminated string STR from the FROM_CODSET code set
+   to the TO_CODESET code set.  The returned string is allocated using
+   malloc, and must be dellocated by the caller using free.  On
+   failure, NULL is returned and errno holds the error reason.  Note
+   that if TO_CODESET uses \0 for anything but to terminate the
+   string, the caller of this function may have difficulties finding
+   out the length of the output string.  */
+char *
+iconv_string (const char *str, const char *from_codeset,
+             const char *to_codeset)
+{
+  char *dest = NULL;
+#if HAVE_ICONV
+  iconv_t cd;
+  char *outp;
+  char *p = (char *) str;
+  size_t inbytes_remaining = strlen (p);
+  /* Guess the maximum length the output string can have.  */
+  size_t outbuf_size = (inbytes_remaining + 1) * MB_LEN_MAX;
+  size_t outbytes_remaining = outbuf_size - 1; /* -1 for NUL */
+  size_t err;
+  int have_error = 0;
+
+  if (1 < MB_LEN_MAX && SIZE_MAX / MB_LEN_MAX <= inbytes_remaining)
+    {
+      errno = ENOMEM;
+      return NULL;
+    }
+#endif
+
+  if (strcmp (to_codeset, from_codeset) == 0)
+    return strdup (str);
+
+#if HAVE_ICONV
+  cd = iconv_open (to_codeset, from_codeset);
+  if (cd == (iconv_t) -1)
+    return NULL;
+
+  outp = dest = (char *) malloc (outbuf_size);
+  if (dest == NULL)
+    goto out;
+
+again:
+  err = iconv (cd, &p, &inbytes_remaining, &outp, &outbytes_remaining);
+
+  if (err == (size_t) - 1)
+    {
+      switch (errno)
+       {
+       case EINVAL:
+         /* Incomplete text, do not report an error */
+         break;
+
+       case E2BIG:
+         {
+           size_t used = outp - dest;
+           size_t newsize = outbuf_size * 2;
+           char *newdest;
+
+           if (newsize <= outbuf_size)
+             {
+               errno = ENOMEM;
+               have_error = 1;
+               goto out;
+             }
+           newdest = (char *) realloc (dest, newsize);
+           if (newdest == NULL)
+             {
+               have_error = 1;
+               goto out;
+             }
+           dest = newdest;
+           outbuf_size = newsize;
+
+           outp = dest + used;
+           outbytes_remaining = outbuf_size - used - 1;        /* -1 for NUL */
+
+           goto again;
+         }
+         break;
+
+       case EILSEQ:
+         have_error = 1;
+         break;
+
+       default:
+         have_error = 1;
+         break;
+       }
+    }
+
+  *outp = '\0';
+
+out:
+  {
+    int save_errno = errno;
+
+    if (iconv_close (cd) < 0 && !have_error)
+      {
+       /* If we didn't have a real error before, make sure we restore
+          the iconv_close error below. */
+       save_errno = errno;
+       have_error = 1;
+      }
+
+    if (have_error && dest)
+      {
+       free (dest);
+       dest = NULL;
+       errno = save_errno;
+      }
+  }
+#else
+  errno = ENOSYS;
+#endif
+
+  return dest;
+}

diff --git a/lib/iconvme.h b/lib/iconvme.h
new file mode 100644 (file)
index 0000000..3eb9b32
--- /dev/null
+++ b/lib/iconvme.h
@@ -0,0 +1,25 @@
+/* Recode strings between character sets, using iconv.
+   Copyright (C) 2004 Free Software Foundation, Inc.
+   Written by Simon Josefsson.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation; either version 2.1, 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 Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License along
+   with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#ifndef ICONVME_H
+# define ICONVME_H
+
+extern char *iconv_string (const char *string, const char *from_code,
+                          const char *to_code);
+
+#endif /* ICONVME_H */

diff --git a/lib/size_max.h b/lib/size_max.h
new file mode 100644 (file)
index 0000000..dcce48e
--- /dev/null
+++ b/lib/size_max.h
@@ -0,0 +1,27 @@
+/* size_max.h -- declare SIZE_MAX through system headers
+   Copyright (C) 2005 Free Software Foundation, Inc.
+   Written by Simon Josefsson.
+
+   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 2, 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, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#ifndef GNULIB_SIZE_MAX_H
+#define GNULIB_SIZE_MAX_H
+
+# include <limits.h>
+# if HAVE_STDINT_H
+#  include <stdint.h>
+# endif
+
+#endif /* GNULIB_SIZE_MAX_H */