source: rtems/cpukit/httpd/rom.c @ 54650f51

/*
 * rom.c -- Support for ROMed page retrieval.
 *
 * Copyright (c) GoAhead Software Inc., 1995-2000. All Rights Reserved.
 *
 * See the file "license.txt" for usage and redistribution license requirements
 *
 * $Id$
 */

/******************************** Description *********************************/

/*
 *      This module provides web page retrieval from compiled web pages. Use the
 *      webcomp program to compile web pages and link into the GoAhead WebServer.
 *      This module uses a hashed symbol table for fast page lookup.
 *
 *      Usage: webcomp -f webPageFileList -p Prefix >webrom.c
 */

/********************************* Includes ***********************************/

#include        <stdlib.h>

#include        "wsIntrn.h"

/******************************** Local Data **********************************/

#ifdef WEBS_PAGE_ROM

sym_fd_t        romTab;                                         /* Symbol table for web pages */

/*********************************** Code *************************************/
/*
 *      Open the ROM module
 */

int websRomOpen()
{
        websRomPageIndexType    *wip;
        int                                             nchars;
        char_t                                  name[SYM_MAX];

        romTab = symOpen(WEBS_SYM_INIT);

        for (wip = websRomPageIndex; wip->path; wip++) {
                gstrncpy(name, wip->path, SYM_MAX);
                nchars = gstrlen(name) - 1;
                if (nchars > 0 &&
                        (name[nchars] == '/' || name[nchars] == '\\')) {
                        name[nchars] = '\0';
                }
                symEnter(romTab, name, valueInteger((int) wip), 0);
        }
        return 0;
}

/******************************************************************************/
/*
 *      Close the ROM module
 */

void websRomClose()
{
        symClose(romTab);
}

/******************************************************************************/
/*
 *      Open a web page
 */

int websRomPageOpen(webs_t wp, char_t *path, int mode, int perm)
{
        websRomPageIndexType    *wip;
        sym_t                                   *sp;

        a_assert(websValid(wp));
        a_assert(path && *path);

        if ((sp = symLookup(romTab, path)) == NULL) {
                return -1;
        }
        wip = (websRomPageIndexType*) sp->content.value.integer;
        wip->pos = 0;
        return (wp->docfd = wip - websRomPageIndex);
}

/******************************************************************************/
/*
 *      Close a web page
 */

void websRomPageClose(int fd)
{
}

/******************************************************************************/
/*
 *      Stat a web page
 */

int websRomPageStat(char_t *path, websStatType *sbuf)
{
        websRomPageIndexType    *wip;
        sym_t                                   *sp;

        a_assert(path && *path);

        if ((sp = symLookup(romTab, path)) == NULL) {
                return -1;
        }
        wip = (websRomPageIndexType*) sp->content.value.integer;

        memset(sbuf, 0, sizeof(websStatType));
        sbuf->size = wip->size;
        if (wip->page == NULL) {
                sbuf->isDir = 1;
        }
        return 0;
}

/******************************************************************************/
/*
 *      Read a web page
 */

int websRomPageReadData(webs_t wp, char *buf, int nBytes)
{
        websRomPageIndexType    *wip;
        int                                             len;

        a_assert(websValid(wp));
        a_assert(buf);
        a_assert(wp->docfd >= 0);

        wip = &websRomPageIndex[wp->docfd];

        len = min(wip->size - wip->pos, nBytes);
        memcpy(buf, &wip->page[wip->pos], len);
        wip->pos += len;
        return len;
}

/******************************************************************************/
/*
 *      Position a web page
 */

long websRomPageSeek(webs_t wp, long offset, int origin)
{
        websRomPageIndexType    *wip;
        long pos;

        a_assert(websValid(wp));
        a_assert(origin == SEEK_SET || origin == SEEK_CUR || origin == SEEK_END);
        a_assert(wp->docfd >= 0);

        wip = &websRomPageIndex[wp->docfd];

        if (origin != SEEK_SET && origin != SEEK_CUR && origin != SEEK_END) {
                errno = EINVAL;
                return -1;
        }

        if (wp->docfd < 0) {
                errno = EBADF;
                return -1;
        }

        pos = offset;
        switch (origin) {
        case SEEK_CUR:
                pos = wip->pos + offset;
                break;
        case SEEK_END:
                pos = wip->size + offset;
                break;
        default:
                break;
        }

        if (pos < 0) {
                errno = EBADF;
                return -1;
        }

        return (wip->pos = pos);
}

#endif /* WEBS_PAGE_ROM */

/******************************************************************************/