src/http/header/get.c

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#include <stdlib.h>
#include <ctype.h>

#include "http/header.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 HttpHeader b = *(const HttpHeader *)_b;
        return (a < b->hash)? -1 : (a > b->hash)? 1 : 0;
}

char *
httpHeaderGet(const HttpHeader header[], int nheader, const char * name)
{
        unsigned long hash = sdbm((unsigned char *)name);
        HttpHeader    found;

        found = bsearch(&hash, header, nheader, sizeof(HttpHeader), comp);

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

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