--- /dev/null
+/* argz.c -- argz implementation for non-glibc systems
+
+ Copyright (C) 2004, 2006, 2007, 2008 Free Software Foundation, Inc.
+ Written by Gary V. Vaughan, 2004
+
+ NOTE: The canonical source of this file is maintained with the
+ GNU Libtool package. Report bugs to bug-libtool@gnu.org.
+
+GNU Libltdl 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 of the License, or (at your option) any later version.
+
+As a special exception to the GNU Lesser General Public License,
+if you distribute this file as part of a program or library that
+is built using GNU Libtool, you may include this file under the
+same distribution terms that you use for the rest of that program.
+
+GNU Libltdl 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 GNU Libltdl; see the file COPYING.LIB. If not, a
+copy can be downloaded from http://www.gnu.org/licenses/lgpl.html,
+or obtained by writing to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+*/
+
+#if defined(LTDL) && defined LT_CONFIG_H
+# include LT_CONFIG_H
+#else
+# include <config.h>
+#endif
+
+#include <argz.h>
+
+#include <assert.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <errno.h>
+#include <string.h>
+
+#define EOS_CHAR '\0'
+
+error_t
+argz_append (char **pargz, size_t *pargz_len, const char *buf, size_t buf_len)
+{
+ size_t argz_len;
+ char *argz;
+
+ assert (pargz);
+ assert (pargz_len);
+ assert ((*pargz && *pargz_len) || (!*pargz && !*pargz_len));
+
+ /* If nothing needs to be appended, no more work is required. */
+ if (buf_len == 0)
+ return 0;
+
+ /* Ensure there is enough room to append BUF_LEN. */
+ argz_len = *pargz_len + buf_len;
+ argz = (char *) realloc (*pargz, argz_len);
+ if (!argz)
+ return ENOMEM;
+
+ /* Copy characters from BUF after terminating '\0' in ARGZ. */
+ memcpy (argz + *pargz_len, buf, buf_len);
+
+ /* Assign new values. */
+ *pargz = argz;
+ *pargz_len = argz_len;
+
+ return 0;
+}
+
+
+error_t
+argz_create_sep (const char *str, int delim, char **pargz, size_t *pargz_len)
+{
+ size_t argz_len;
+ char *argz = 0;
+
+ assert (str);
+ assert (pargz);
+ assert (pargz_len);
+
+ /* Make a copy of STR, but replacing each occurrence of
+ DELIM with '\0'. */
+ argz_len = 1+ strlen (str);
+ if (argz_len)
+ {
+ const char *p;
+ char *q;
+
+ argz = (char *) malloc (argz_len);
+ if (!argz)
+ return ENOMEM;
+
+ for (p = str, q = argz; *p != EOS_CHAR; ++p)
+ {
+ if (*p == delim)
+ {
+ /* Ignore leading delimiters, and fold consecutive
+ delimiters in STR into a single '\0' in ARGZ. */
+ if ((q > argz) && (q[-1] != EOS_CHAR))
+ *q++ = EOS_CHAR;
+ else
+ --argz_len;
+ }
+ else
+ *q++ = *p;
+ }
+ /* Copy terminating EOS_CHAR. */
+ *q = *p;
+ }
+
+ /* If ARGZ_LEN has shrunk to nothing, release ARGZ's memory. */
+ if (!argz_len)
+ argz = (free (argz), (char *) 0);
+
+ /* Assign new values. */
+ *pargz = argz;
+ *pargz_len = argz_len;
+
+ return 0;
+}
+
+
+error_t
+argz_insert (char **pargz, size_t *pargz_len, char *before, const char *entry)
+{
+ assert (pargz);
+ assert (pargz_len);
+ assert (entry && *entry);
+
+ /* No BEFORE address indicates ENTRY should be inserted after the
+ current last element. */
+ if (!before)
+ return argz_append (pargz, pargz_len, entry, 1+ strlen (entry));
+
+ /* This probably indicates a programmer error, but to preserve
+ semantics, scan back to the start of an entry if BEFORE points
+ into the middle of it. */
+ while ((before > *pargz) && (before[-1] != EOS_CHAR))
+ --before;
+
+ {
+ size_t entry_len = 1+ strlen (entry);
+ size_t argz_len = *pargz_len + entry_len;
+ size_t offset = before - *pargz;
+ char *argz = (char *) realloc (*pargz, argz_len);
+
+ if (!argz)
+ return ENOMEM;
+
+ /* Make BEFORE point to the equivalent offset in ARGZ that it
+ used to have in *PARGZ incase realloc() moved the block. */
+ before = argz + offset;
+
+ /* Move the ARGZ entries starting at BEFORE up into the new
+ space at the end -- making room to copy ENTRY into the
+ resulting gap. */
+ memmove (before + entry_len, before, *pargz_len - offset);
+ memcpy (before, entry, entry_len);
+
+ /* Assign new values. */
+ *pargz = argz;
+ *pargz_len = argz_len;
+ }
+
+ return 0;
+}
+
+
+char *
+argz_next (char *argz, size_t argz_len, const char *entry)
+{
+ assert ((argz && argz_len) || (!argz && !argz_len));
+
+ if (entry)
+ {
+ /* Either ARGZ/ARGZ_LEN is empty, or ENTRY points into an address
+ within the ARGZ vector. */
+ assert ((!argz && !argz_len)
+ || ((argz <= entry) && (entry < (argz + argz_len))));
+
+ /* Move to the char immediately after the terminating
+ '\0' of ENTRY. */
+ entry = 1+ strchr (entry, EOS_CHAR);
+
+ /* Return either the new ENTRY, or else NULL if ARGZ is
+ exhausted. */
+ return (entry >= argz + argz_len) ? 0 : (char *) entry;
+ }
+ else
+ {
+ /* This should probably be flagged as a programmer error,
+ since starting an argz_next loop with the iterator set
+ to ARGZ is safer. To preserve semantics, handle the NULL
+ case by returning the start of ARGZ (if any). */
+ if (argz_len > 0)
+ return argz;
+ else
+ return 0;
+ }
+}
+
+
+void
+argz_stringify (char *argz, size_t argz_len, int sep)
+{
+ assert ((argz && argz_len) || (!argz && !argz_len));
+
+ if (sep)
+ {
+ --argz_len; /* don't stringify the terminating EOS */
+ while (--argz_len > 0)
+ {
+ if (argz[argz_len] == EOS_CHAR)
+ argz[argz_len] = sep;
+ }
+ }
+}
+
HCoop / hcoop / debian / courier-authlib.git / blobdiff