146 lines
3.1 KiB
C
146 lines
3.1 KiB
C
/*
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* the chache engine - code
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include <stdlib.h>
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#include <string.h>
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#include "../floatimg.h"
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#include "cachengn.h"
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extern int verbosity;
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static int nombre_slots = -1;
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static int index_slot = -1;
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static FimgCacheEntry *le_cache = NULL;
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/* ------------------------------------------------------------ */
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void cachengn_print_version(int k)
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{
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printf("\t!!! this is the version ZERO !!!\n");
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fprintf(stderr, "sizeof cache entry: %ld\n", sizeof(FimgCacheEntry));
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if (k) fimg_print_version(0);
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}
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/* ------------------------------------------------------------ */
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/*
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*
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*/
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int init_empty_cache(int iw, int ih, int szc, int wtfparam)
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{
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int idx;
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fprintf(stderr, ">>> %s ( %d %d %d %d )\n", __func__,
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iw, ih, szc, wtfparam);
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/* MOLLYGUARD : don't init TWICE, please */
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if (NULL != le_cache) {
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fprintf(stderr, "%s: there is a cache at %p\n", __func__,
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le_cache);
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return -2;
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}
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/* allocate an prepare memory */
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if ( NULL==(le_cache=calloc(szc, sizeof(FimgCacheEntry))) ) {
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fprintf(stderr, "%s: no memory, sorry...\n", __func__);
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return -3;
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}
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fprintf(stderr, " slot array at %p\n", le_cache);
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for (idx=0; idx<szc; idx++) {
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le_cache[idx].flags = 0xF0;
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le_cache[idx].index = idx;
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}
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/* update private cache metadata */
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nombre_slots = szc;
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return 0;
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}
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/* ------------------------------------------------------------ */
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/*
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*
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*/
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FloatImg *give_me_thiz_picz(char *fname, int notused)
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{
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int idx, foo, freeslot;
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FloatImg img;
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char *nptr;
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fprintf(stderr, ">>> %s ( '%s' %d )\n", __func__, fname, notused);
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/* please add molly guard ! */
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if (notused)
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fprintf(stderr, "in %s, notused was %d\n", __func__, notused);
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/* is the floatimg already in the cahce ? */
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for (idx=0; idx<nombre_slots; idx++) {
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nptr = le_cache[idx].filename;
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if (NULL!=nptr && (! strcmp(fname, nptr))) {
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fprintf(stderr, "found '%s' at %d\n", nptr, idx);
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return le_cache[idx].image;
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}
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}
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/* we not have this picture in ou cache, so we need a free
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slot for it */
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freeslot = -1;
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for (idx=0; idx<nombre_slots; idx++) {
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if (NULL==le_cache[idx].image) {
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freeslot = idx;
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break;
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}
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}
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fprintf(stderr, "freeslot = %d\n", freeslot);
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/* check if we can read this file */
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foo = access(fname, R_OK); /* XXX */
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if (foo) {
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perror(__FILE__ ": give_me_thiz_picz");
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return NULL;
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}
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/* try to load the requested file */
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foo = fimg_create_from_dump(fname, &img);
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if (foo) {
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fprintf(stderr, "oups on %s\n", fname);
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return NULL;
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}
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/* OK we have all the pixels in core memorey */
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return NULL;
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}
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/* ------------------------------------------------------------ */
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/*
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*
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*/
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int liste_le_cache(unsigned int flags)
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{
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int idx;
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fprintf(stderr, ">>> %s ( Ox%X )\n", __func__, flags);
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/* please add molly guard here */
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fprintf(stderr, "cache at %p : %d slots, idx = %d\n",
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le_cache, nombre_slots, index_slot);
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for (idx=0; idx<nombre_slots; idx++) {
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fprintf(stderr, "%5d ", idx);
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fprintf(stderr, "0x%02x ", le_cache[idx].flags);
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fprintf(stderr, "%p ", le_cache[idx].image);
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fprintf(stderr, "%s\n", le_cache[idx].filename);
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}
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return 0;
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}
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/* ------------------------------------------------------------ */
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