| 0,0 → 1,69 |
|---|
| /* This file is part of the SvarCOM project and is published under the terms |
| * of the MIT license. |
| * |
| * Copyright (C) 2021-2022 Mateusz Viste |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| * DEALINGS IN THE SOFTWARE. |
| */ |
| |
| /* |
| * routines used to manipulate the environment block |
| */ |
| |
| #ifndef ENV_H |
| #define ENV_H |
| |
| /* looks for varname in environment block and returns a far ptr to it if |
| * found, NULL otherwise. varname MUST be in upper-case and MUST be terminated |
| * by either a = sign or a NULL terminator */ |
| char far *env_lookup(unsigned short env_seg, const char *varname); |
| |
| /* almost identical to env_lookup(), but instead of returning a pointer |
| * to the 'NAME=value' string, it returns a pointer to value (or NULL if |
| * var not found) */ |
| char far *env_lookup_val(unsigned short env_seg, const char *varname); |
| |
| /* locates the value of env variable varname and copies it to result, up to |
| * ressz bytes (incl. the NULL terminator). returns the length of the value on |
| * success, 0 if var not found or couldn't fit in ressz). */ |
| unsigned short env_lookup_valcopy(char *res, unsigned short ressz, unsigned short env_seg, const char *varname); |
| |
| /* returns the size, in bytes, of the allocated environment block */ |
| unsigned short env_allocsz(unsigned short env_seg); |
| |
| /* remove a variable from environment, if present. returns 0 on success, non-zero if variable not found */ |
| int env_dropvar(unsigned short env_seg, const char *varname); |
| |
| #define ENV_SUCCESS 0 |
| #define ENV_NOTENOM -1 |
| #define ENV_INVSYNT -2 |
| |
| /* Writes a variable to environment block. The variable must in the form |
| * "varname=value". If variable is already present in the environment block, |
| * then the value will be updated. If the new value is empty, then the |
| * existing variable (if any) is removed. |
| * |
| * This function returns: |
| * ENV_SUCCESS = success |
| * ENV_NOTENOM = not enough available space in memory block |
| * ENV_INVSYNT = invalid syntax |
| */ |
| int env_setvar(unsigned short env_seg, const char *v); |
| |
| #endif |