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/*
* 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
*/
/******************************** 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 **********************************/
#if 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 */
/******************************************************************************/
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