haproxy/include/common/http-hdr.h

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/*
* HTTP header management (new model) - type definitions
*
* Copyright (C) 2014-2017 Willy Tarreau <willy@haproxy.org>
* Copyright (C) 2017 HAProxy Technologies
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef _COMMON_HTTP_HDR_H
#define _COMMON_HTTP_HDR_H
#include <stdint.h>
#include <common/ist.h>
/* a header field made of a name and a value. Such structure stores 4 longs so
* it takes 16 bytes on 32-bit systems and 32 bytes on 64-bit systems.
*/
struct http_hdr {
struct ist n; /* name */
struct ist v; /* value */
};
/* sets an http_hdr <hdr> to name <n> and value <v>. Useful to avoid casts in
* immediate assignments.
*/
static inline void http_set_hdr(struct http_hdr *hdr, const struct ist n, const struct ist v)
{
hdr->n = n;
hdr->v = v;
}
/* removes all occurrences of header name <n> in list <hdr> and returns the new count. The
* list must be terminated by the empty header.
*/
static inline int http_del_hdr(struct http_hdr *hdr, const struct ist n)
{
int src = 0, dst = 0;
do {
if (!isteqi(hdr[src].n, n)) {
if (src != dst)
hdr[dst] = hdr[src];
dst++;
}
} while (hdr[src++].n.len);
return dst;
}
#endif /* _COMMON_HTTP_HDR_H */