scriplib.cpp

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/*
Copyright (C) 1997-2001 Id Software, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/


#include "shared.h"
#include "scriplib.h"

/*
=============================================================================
PARSING STUFF
=============================================================================
*/

typedef struct {
    char filename[MAX_OSPATH];
    char* buffer;
    const char* script_p;
    const char* end_p;
} script_t;

static script_t script;

char parsedToken[MAX_TOKEN_CHARS];

void LoadScriptFile (const char* filename)
{
    strncpy(script.filename, filename, sizeof(script.filename));

    const int size = FS_LoadFile(script.filename, (byte**)&script.buffer);
    if (size == -1)
        Sys_Error("file '%s' doesn't exist", script.filename);

    script.script_p = script.buffer;
    script.end_p = script.buffer + size;
}

void ParseFromMemory (char* buffer, int size)
{
    Q_strncpyz(script.filename, "memory buffer", sizeof(script.filename));

    script.buffer = buffer;
    script.script_p = script.buffer;
    script.end_p = script.buffer + size;
}

const char* GetToken ()
{
    const char* token = Com_Parse(&script.script_p, parsedToken, sizeof(parsedToken));
    if (!script.script_p) {
        /* not if the current script is a memory buffer */
        if (!Q_streq(script.filename, "memory buffer"))
            Mem_Free(script.buffer);
        assert(Q_strnull(parsedToken));
        return parsedToken;
    }

    return token;
}

bool TokenAvailable (void)
{
    const char* search_p = script.script_p;

    if (search_p >= script.end_p)
        return false;

    while (*search_p <= ' ') {
        if (*search_p == '\n')
            return false;
        search_p++;
        if (search_p == script.end_p)
            return false;
    }

    return true;
}