source: libfaim/util.c @ e0473d2

/*
 * A little bit of this
 * A little bit of that
 * It started with a kiss
 * Now we're up to bat
 */

#define FAIM_INTERNAL
#include <aim.h>
#include <ctype.h>

#ifdef _WIN32
#include "win32dep.h"
#endif

faim_internal void faimdprintf(aim_session_t *sess, int dlevel, const char *format, ...)
{
        if (!sess) {
                fprintf(stderr, "faimdprintf: no session! boo! (%d, %s)\n", dlevel, format);
                return;
        }
        if ((dlevel <= sess->debug) && sess->debugcb) {
                va_list ap;
                va_start(ap, format);
                sess->debugcb(sess, dlevel, format, ap);
                va_end(ap);
        }

        return;
}

faim_export int aimutil_putstr(char *dest, const char *src, int len)
{
        memcpy(dest, src, len);
        return len;
}

/*
 * Tokenizing functions.  Used to portably replace strtok/sep.
 *   -- DMP.
 *
 */
faim_export int aimutil_tokslen(char *toSearch, int theindex, char dl)
{
        int curCount = 1;
        char *next;
        char *last;
        int toReturn;

        last = toSearch;
        next = strchr(toSearch, dl);

        while(curCount < theindex && next != NULL) {
                curCount++;
                last = next + 1;
                next = strchr(last, dl);
        }

        if ((curCount < theindex) || (next == NULL))
                toReturn = strlen(toSearch) - (curCount - 1);
        else
                toReturn = next - toSearch - (curCount - 1);

        return toReturn;
}

faim_export int aimutil_itemcnt(char *toSearch, char dl)
{
        int curCount;
        char *next;

        curCount = 1;

        next = strchr(toSearch, dl);

        while(next != NULL) {
                curCount++;
                next = strchr(next + 1, dl);
        }

        return curCount;
}

faim_export char *aimutil_itemindex(char *toSearch, int theindex, char dl)
{
        int curCount;
        char *next;
        char *last;
        char *toReturn;

        curCount = 0;

        last = toSearch;
        next = strchr(toSearch, dl);

        while (curCount < theindex && next != NULL) {
                curCount++;
                last = next + 1;
                next = strchr(last, dl);
        }

        if (curCount < theindex) {
                toReturn = malloc(sizeof(char));
                *toReturn = '\0';
        }
        next = strchr(last, dl);

        if (curCount < theindex) {
                toReturn = malloc(sizeof(char));
                *toReturn = '\0';
        } else {
                if (next == NULL) {
                        toReturn = malloc((strlen(last) + 1) * sizeof(char));
                        strcpy(toReturn, last);
                } else {
                        toReturn = malloc((next - last + 1) * sizeof(char));
                        memcpy(toReturn, last, (next - last));
                        toReturn[next - last] = '\0';
                }
        }
        return toReturn;
}

/**
 * Calculate the checksum of a given icon.
 *
 */
faim_export fu16_t aimutil_iconsum(const fu8_t *buf, int buflen)
{
        fu32_t sum;
        int i;

        for (i=0, sum=0; i+1<buflen; i+=2)
                sum += (buf[i+1] << 8) + buf[i];
        if (i < buflen)
                sum += buf[i];
        sum = ((sum & 0xffff0000) >> 16) + (sum & 0x0000ffff);

        return sum;
}

faim_export int aim_util_getlocalip(fu8_t *ip)
{
        struct hostent *hptr;
        char localhost[129];

        /* XXX if available, use getaddrinfo() */
        /* XXX allow client to specify which IP to use for multihomed boxes */

        if (gethostname(localhost, 128) < 0)
                return -1;

        if (!(hptr = gethostbyname(localhost)))
                return -1;
        memcpy(ip, hptr->h_addr_list[0], 4);

        return 0;
}

/*
* int snlen(const char *)
* 
* This takes a screen name and returns its length without
* spaces.  If there are no spaces in the SN, then the 
* return is equal to that of strlen().
*
*/
faim_export int aim_snlen(const char *sn)
{
        int i = 0;

        if (!sn)
                return 0;

        while (*sn != '\0') {
                if (*sn != ' ')
                        i++;
                sn++;
        }

        return i;
}

/*
* int sncmp(const char *, const char *)
*
* This takes two screen names and compares them using the rules
* on screen names for AIM/AOL.  Mainly, this means case and space
* insensitivity (all case differences and spacing differences are
* ignored, with the exception that screen names can not start with 
* a space).
*
* Return: 0 if equal
*     non-0 if different
*
*/
faim_export int aim_sncmp(const char *sn1, const char *sn2)
{

        do {
                while (*sn2 == ' ')
                        sn2++;
                while (*sn1 == ' ')
                        sn1++;
                if (toupper(*sn1) != toupper(*sn2))
                        return 1;
        } while ((*sn1 != '\0') && sn1++ && sn2++);

        return 0;
}