SDL

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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2024 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_internal.h"
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#ifdef SDL_FILESYSTEM_EMSCRIPTEN
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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// System dependent filesystem routines
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#include "../SDL_sysfilesystem.h"
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#include <errno.h>
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#include <sys/stat.h>
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#include <emscripten/emscripten.h>
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char *SDL_SYS_GetBasePath(void)
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{
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    return SDL_strdup("/");
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}
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char *SDL_SYS_GetPrefPath(const char *org, const char *app)
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{
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    const char *append = "/libsdl/";
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    char *result;
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    char *ptr = NULL;
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    size_t len = 0;
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    if (!app) {
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        SDL_InvalidParamError("app");
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        return NULL;
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    }
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    if (!org) {
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        org = "";
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    }
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    len = SDL_strlen(append) + SDL_strlen(org) + SDL_strlen(app) + 3;
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    result = (char *)SDL_malloc(len);
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    if (!result) {
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        return NULL;
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    }
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    if (*org) {
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        SDL_snprintf(result, len, "%s%s/%s/", append, org, app);
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    } else {
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        SDL_snprintf(result, len, "%s%s/", append, app);
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    }
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    for (ptr = result + 1; *ptr; ptr++) {
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        if (*ptr == '/') {
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            *ptr = '\0';
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            if (mkdir(result, 0700) != 0 && errno != EEXIST) {
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                goto error;
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            }
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            *ptr = '/';
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        }
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    }
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    if (mkdir(result, 0700) != 0 && errno != EEXIST) {
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    error:
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        SDL_SetError("Couldn't create directory '%s': '%s'", result, strerror(errno));
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        SDL_free(result);
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        return NULL;
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    }
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    return result;
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}
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char *SDL_SYS_GetUserFolder(SDL_Folder folder)
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{
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    const char *home = NULL;
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    if (folder != SDL_FOLDER_HOME) {
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        SDL_SetError("Emscripten only supports the home folder");
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        return NULL;
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    }
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    home = SDL_getenv("HOME");
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    if (!home) {
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        SDL_SetError("No $HOME environment variable available");
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        return NULL;
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    }
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    char *result = SDL_malloc(SDL_strlen(home) + 2);
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    if (!result) {
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        return NULL;
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    }
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    if (SDL_snprintf(result, SDL_strlen(home) + 2, "%s/", home) < 0) {
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        SDL_SetError("Couldn't snprintf home path for Emscripten: %s", home);
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        SDL_free(result);
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        return NULL;
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    }
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    return result;
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}
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#endif // SDL_FILESYSTEM_EMSCRIPTEN
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