aboutsummaryrefslogtreecommitdiff
path: root/libiberty/concat.c
diff options
context:
space:
mode:
authorRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
committerRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
commit252b5132c753830d5fd56823373aed85f2a0db63 (patch)
tree1af963bfd8d3e55167b81def4207f175eaff3a56 /libiberty/concat.c
downloadgdb-252b5132c753830d5fd56823373aed85f2a0db63.zip
gdb-252b5132c753830d5fd56823373aed85f2a0db63.tar.gz
gdb-252b5132c753830d5fd56823373aed85f2a0db63.tar.bz2
19990502 sourceware importbinu_ss_19990502
Diffstat (limited to 'libiberty/concat.c')
-rw-r--r--libiberty/concat.c167
1 files changed, 167 insertions, 0 deletions
diff --git a/libiberty/concat.c b/libiberty/concat.c
new file mode 100644
index 0000000..5b132c8
--- /dev/null
+++ b/libiberty/concat.c
@@ -0,0 +1,167 @@
+/* Concatenate variable number of strings.
+ Copyright (C) 1991, 1994 Free Software Foundation, Inc.
+ Written by Fred Fish @ Cygnus Support
+
+This file is part of the libiberty library.
+Libiberty is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+Libiberty 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with libiberty; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+
+/*
+
+NAME
+
+ concat -- concatenate a variable number of strings
+
+SYNOPSIS
+
+ #include <varargs.h>
+
+ char *concat (s1, s2, s3, ..., NULL)
+
+DESCRIPTION
+
+ Concatenate a variable number of strings and return the result
+ in freshly malloc'd memory.
+
+ Returns NULL if insufficient memory is available. The argument
+ list is terminated by the first NULL pointer encountered. Pointers
+ to empty strings are ignored.
+
+NOTES
+
+ This function uses xmalloc() which is expected to be a front end
+ function to malloc() that deals with low memory situations. In
+ typical use, if malloc() returns NULL then xmalloc() diverts to an
+ error handler routine which never returns, and thus xmalloc will
+ never return a NULL pointer. If the client application wishes to
+ deal with low memory situations itself, it should supply an xmalloc
+ that just directly invokes malloc and blindly returns whatever
+ malloc returns.
+*/
+
+
+#include "ansidecl.h"
+#include "libiberty.h"
+
+#ifdef ANSI_PROTOTYPES
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+
+#ifdef __STDC__
+#include <stddef.h>
+extern size_t strlen (const char *s);
+#else
+extern int strlen ();
+#endif
+
+#define NULLP (char *)0
+
+/* VARARGS */
+#ifdef ANSI_PROTOTYPES
+char *
+concat (const char *first, ...)
+#else
+char *
+concat (va_alist)
+ va_dcl
+#endif
+{
+ register int length;
+ register char *newstr;
+ register char *end;
+ register const char *arg;
+ va_list args;
+#ifndef ANSI_PROTOTYPES
+ const char *first;
+#endif
+
+ /* First compute the size of the result and get sufficient memory. */
+
+#ifdef ANSI_PROTOTYPES
+ va_start (args, first);
+#else
+ va_start (args);
+ first = va_arg (args, const char *);
+#endif
+
+ if (first == NULLP)
+ length = 0;
+ else
+ {
+ length = strlen (first);
+ while ((arg = va_arg (args, const char *)) != NULLP)
+ {
+ length += strlen (arg);
+ }
+ }
+ newstr = (char *) xmalloc (length + 1);
+ va_end (args);
+
+ /* Now copy the individual pieces to the result string. */
+
+ if (newstr != NULLP)
+ {
+#ifdef ANSI_PROTOTYPES
+ va_start (args, first);
+#else
+ va_start (args);
+ first = va_arg (args, const char *);
+#endif
+ end = newstr;
+ if (first != NULLP)
+ {
+ arg = first;
+ while (*arg)
+ {
+ *end++ = *arg++;
+ }
+ while ((arg = va_arg (args, const char *)) != NULLP)
+ {
+ while (*arg)
+ {
+ *end++ = *arg++;
+ }
+ }
+ }
+ *end = '\000';
+ va_end (args);
+ }
+
+ return (newstr);
+}
+
+#ifdef MAIN
+
+/* Simple little test driver. */
+
+#include <stdio.h>
+
+int
+main ()
+{
+ printf ("\"\" = \"%s\"\n", concat (NULLP));
+ printf ("\"a\" = \"%s\"\n", concat ("a", NULLP));
+ printf ("\"ab\" = \"%s\"\n", concat ("a", "b", NULLP));
+ printf ("\"abc\" = \"%s\"\n", concat ("a", "b", "c", NULLP));
+ printf ("\"abcd\" = \"%s\"\n", concat ("ab", "cd", NULLP));
+ printf ("\"abcde\" = \"%s\"\n", concat ("ab", "c", "de", NULLP));
+ printf ("\"abcdef\" = \"%s\"\n", concat ("", "a", "", "bcd", "ef", NULLP));
+ return 0;
+}
+
+#endif