/*
 * File source.c - source files management
 *
 * Copyright (C) 2004,      Eric Pouech.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>

#include "dbghelp_private.h"
#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);

/******************************************************************
 *		source_find
 *
 * check whether a source file has already been stored
 */
static unsigned source_find(const struct module* module, const char* name)
{
    char*       ptr = module->sources;

    while (*ptr)
    {
        if (strcmp(ptr, name) == 0) return ptr - module->sources;
        ptr += strlen(ptr) + 1;
    }
    return (unsigned)-1;
}

/******************************************************************
 *		source_new
 *
 * checks if source exists. if not, add it
 */
unsigned source_new(struct module* module, const char* name)
{
    int         len;
    unsigned    ret;

    if (!name) return (unsigned)-1;
    if (module->sources && (ret = source_find(module, name)) != (unsigned)-1)
        return ret;

    len = strlen(name) + 1;
    if (module->sources_used + len + 1 > module->sources_alloc)
    {
        /* Alloc by block of 256 bytes */
        module->sources_alloc = (module->sources_used + len + 1 + 255) & ~255;
        if (!module->sources)
            module->sources = HeapAlloc(GetProcessHeap(), 0, module->sources_alloc);
        else
            module->sources = HeapReAlloc(GetProcessHeap(), 0, module->sources,
                                          module->sources_alloc);
    }
    ret = module->sources_used;
    strcpy(module->sources + module->sources_used, name);
    module->sources_used += len;
    module->sources[module->sources_used] = '\0';
    return ret;
}

/******************************************************************
 *		source_get
 *
 * returns a stored source file name
 */
const char* source_get(const struct module* module, unsigned idx)
{
    if (idx == -1) return "";
    assert(module->sources);
    return module->sources + idx;
}

/******************************************************************
 *		SymEnumSourceFiles (DBGHELP.@)
 *
 */
BOOL WINAPI SymEnumSourceFiles(HANDLE hProcess, ULONG64 ModBase, LPSTR Mask,
                               PSYM_ENUMSOURCFILES_CALLBACK cbSrcFiles,
                               PVOID UserContext)
{
    struct process*     pcs;
    struct module*      module;
    SOURCEFILE          sf;
    char*               ptr;
    
    if (!cbSrcFiles) return FALSE;
    pcs = process_find_by_handle(hProcess);
    if (!pcs) return FALSE;
         
    if (ModBase)
    {
        module = module_find_by_addr(pcs, ModBase, DMT_UNKNOWN);
        if (!(module = module_get_debug(pcs, module))) return FALSE;
    }
    else
    {
        if (Mask[0] == '!')
        {
            module = module_find_by_name(pcs, Mask + 1, DMT_UNKNOWN);
            if (!(module = module_get_debug(pcs, module))) return FALSE;
        }
        else
        {
            FIXME("Unsupported yet (should get info from current context)\n");
            return FALSE;
        }
    }
    if (!module->sources) return FALSE;
    for (ptr = module->sources; *ptr; ptr += strlen(ptr) + 1)
    {
        /* FIXME: not using Mask */
        sf.ModBase = ModBase;
        sf.FileName = ptr;
        if (!cbSrcFiles(&sf, UserContext)) break;
    }

    return TRUE;
}