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- /* ====================================================================
- * Copyright (c) 1998-1999 The Apache Group. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * 4. The names "Apache Server" and "Apache Group" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache"
- * nor may "Apache" appear in their names without prior written
- * permission of the Apache Group.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Group and was originally based
- * on public domain software written at the National Center for
- * Supercomputing Applications, University of Illinois, Urbana-Champaign.
- * For more information on the Apache Group and the Apache HTTP server
- * project, please see <http://www.apache.org/>.
- *
- * The ap_vsnprintf/ap_snprintf functions are based on, and used with the
- * permission of, the SIO stdio-replacement strx_* functions by Panos
- * Tsirigotis <panos@alumni.cs.colorado.edu> for xinetd.
- */
-
- #ifndef APACHE_AP_H
- #define APACHE_AP_H
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- API_EXPORT(char *) ap_cpystrn(char *, const char *, size_t);
- int ap_slack(int, int);
- int ap_execle(const char *, const char *, ...);
- int ap_execve(const char *, const char *argv[], const char *envp[]);
-
- /* small utility macros to make things easier to read */
-
- #ifdef WIN32
- #define ap_killpg(x, y)
- #else
- #ifdef NO_KILLPG
- #define ap_killpg(x, y) (kill (-(x), (y)))
- #else
- #define ap_killpg(x, y) (killpg ((x), (y)))
- #endif
- #endif /* WIN32 */
-
- /* ap_vformatter() is a generic printf-style formatting routine
- * with some extensions. The extensions are:
- *
- * %pA takes a struct in_addr *, and prints it as a.b.c.d
- * %pI takes a struct sockaddr_in * and prints it as a.b.c.d:port
- * %pp takes a void * and outputs it in hex
- *
- * The %p hacks are to force gcc's printf warning code to skip
- * over a pointer argument without complaining. This does
- * mean that the ANSI-style %p (output a void * in hex format) won't
- * work as expected at all, but that seems to be a fair trade-off
- * for the increased robustness of having printf-warnings work.
- *
- * Additionally, ap_vformatter allows for arbitrary output methods
- * using the ap_vformatter_buff and flush_func.
- *
- * The ap_vformatter_buff has two elements curpos and endpos.
- * curpos is where ap_vformatter will write the next byte of output.
- * It proceeds writing output to curpos, and updating curpos, until
- * either the end of output is reached, or curpos == endpos (i.e. the
- * buffer is full).
- *
- * If the end of output is reached, ap_vformatter returns the
- * number of bytes written.
- *
- * When the buffer is full, the flush_func is called. The flush_func
- * can return -1 to indicate that no further output should be attempted,
- * and ap_vformatter will return immediately with -1. Otherwise
- * the flush_func should flush the buffer in whatever manner is
- * appropriate, re-initialize curpos and endpos, and return 0.
- *
- * Note that flush_func is only invoked as a result of attempting to
- * write another byte at curpos when curpos >= endpos. So for
- * example, it's possible when the output exactly matches the buffer
- * space available that curpos == endpos will be true when
- * ap_vformatter returns.
- *
- * ap_vformatter does not call out to any other code, it is entirely
- * self-contained. This allows the callers to do things which are
- * otherwise "unsafe". For example, ap_psprintf uses the "scratch"
- * space at the unallocated end of a block, and doesn't actually
- * complete the allocation until ap_vformatter returns. ap_psprintf
- * would be completely broken if ap_vformatter were to call anything
- * that used a pool. Similarly http_bprintf() uses the "scratch"
- * space at the end of its output buffer, and doesn't actually note
- * that the space is in use until it either has to flush the buffer
- * or until ap_vformatter returns.
- */
-
- typedef struct {
- char *curpos;
- char *endpos;
- } ap_vformatter_buff;
-
- API_EXPORT(int) ap_vformatter(int (*flush_func)(ap_vformatter_buff *),
- ap_vformatter_buff *, const char *fmt, va_list ap);
-
- /* These are snprintf implementations based on ap_vformatter().
- *
- * Note that various standards and implementations disagree on the return
- * value of snprintf, and side-effects due to %n in the formatting string.
- * ap_snprintf behaves as follows:
- *
- * Process the format string until the entire string is exhausted, or
- * the buffer fills. If the buffer fills then stop processing immediately
- * (so no further %n arguments are processed), and return the buffer
- * length. In all cases the buffer is NUL terminated.
- *
- * In no event does ap_snprintf return a negative number. It's not possible
- * to distinguish between an output which was truncated, and an output which
- * exactly filled the buffer.
- */
- API_EXPORT(int) ap_snprintf(char *buf, size_t len, const char *format,...)
- __attribute__((format(printf,3,4)));
- API_EXPORT(int) ap_vsnprintf(char *buf, size_t len, const char *format,
- va_list ap);
-
- #ifdef __cplusplus
- }
- #endif
-
- #endif /* !APACHE_AP_H */
-