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Diffstat (limited to 'rubbos/app/tomcat-connectors-1.2.32-src/native/common/ap_snprintf.h')
| -rw-r--r-- | rubbos/app/tomcat-connectors-1.2.32-src/native/common/ap_snprintf.h | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/rubbos/app/tomcat-connectors-1.2.32-src/native/common/ap_snprintf.h b/rubbos/app/tomcat-connectors-1.2.32-src/native/common/ap_snprintf.h new file mode 100644 index 00000000..73b3c6e5 --- /dev/null +++ b/rubbos/app/tomcat-connectors-1.2.32-src/native/common/ap_snprintf.h @@ -0,0 +1,150 @@ +/* Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/* + * 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_SNPRINTF_H +#define APACHE_AP_SNPRINTF_H + +#include <stdio.h> +#include <stdarg.h> +#include <limits.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/* stuff marked API_EXPORT is part of the API, and intended for use + * by modules + */ +#ifndef API_EXPORT +#define API_EXPORT(type) type +#endif + +/* Stuff marked API_EXPORT_NONSTD is part of the API, and intended for + * use by modules. The difference between API_EXPORT and + * API_EXPORT_NONSTD is that the latter is required for any functions + * which use varargs or are used via indirect function call. This + * is to accomodate the two calling conventions in windows dlls. + */ +#ifndef API_EXPORT_NONSTD +#define API_EXPORT_NONSTD(type) type +#endif + +#if !defined(__GNUC__) || __GNUC__ < 2 || \ + (__GNUC__ == 2 && __GNUC_MINOR__ < 7) ||\ + defined(NEXT) +#define __attribute__(__x) +#endif + +/* These macros allow correct support of 8-bit characters on systems which + * support 8-bit characters. Pretty dumb how the cast is required, but + * that's legacy libc for ya. These new macros do not support EOF like + * the standard macros do. Tough. + */ +#define ap_isalpha(c) (isalpha(((unsigned char)(c)))) +#define ap_isdigit(c) (isdigit(((unsigned char)(c)))) +#define ap_islower(c) (islower(((unsigned char)(c)))) + + +/* 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. The return value + * is the number of characters placed in the buffer, excluding the + * terminating NUL. All this implies that, at most, (len-1) characters + * will be copied over; if the return value is >= len, then truncation + * occured. + * + * In no event does ap_snprintf return a negative number. + */ +API_EXPORT_NONSTD(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_SNPRINTF_H */ |