src/http/request/header_get.c

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#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: