header_get.c 810 Bytes
#include <stdlib.h>
#include <ctype.h>

#include "http/request.h"

static
inline
unsigned long
sdbm(const unsigned char * str)
{
	unsigned long hash = 0;
	int c;

	while ((c = tolower(*str++)))
		hash = c + (hash << 6) + (hash << 16) - hash;

	return hash;
}

static
inline
int
comp (const void * _a, const void * _b)
{
	unsigned long a = *(unsigned long *)_a;
	const struct HttpRequestHeader * b = _b;
	return (a < b->hash)? -1 : (a > b->hash)? 1 : 0;
}

char *
httpRequestHeaderGet(HttpRequest this, const char * name)
{
	unsigned long              hash = sdbm((unsigned char *)name);
	struct HttpRequestHeader * header;

	header = bsearch(
			&hash,
			this->header,
			this->nheader,
			sizeof(struct HttpRequestHeader),
			comp);

	return (NULL != header)? header->value : NULL;
}

// vim: set ts=4 sw=4: