projects / people / ms / network.git / blame
| Commit | Line | Data |
|---|---|---|
| 4237caa2 MT |
1 | /*############################################################################# |
| 2 | # # | |
| 3 | # IPFire.org - A linux based firewall # | |
| 4 | # Copyright (C) 2023 IPFire Network Development Team # | |
| 5 | # # | |
| 6 | # This program is free software: you can redistribute it and/or modify # | |
| 7 | # it under the terms of the GNU General Public License as published by # | |
| 8 | # the Free Software Foundation, either version 3 of the License, or # | |
| 9 | # (at your option) any later version. # | |
| 10 | # # | |
| 11 | # This program is distributed in the hope that it will be useful, # | |
| 12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of # | |
| 13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # | |
| 14 | # GNU General Public License for more details. # | |
| 15 | # # | |
| 16 | # You should have received a copy of the GNU General Public License # | |
| 17 | # along with this program. If not, see <http://www.gnu.org/licenses/>. # | |
| 18 | # # | |
| 19 | #############################################################################*/ | |
| 20 | ||
| 21 | #ifndef NETWORKD_STRING_H | |
| 22 | #define NETWORKD_STRING_H | |
| 23 | ||
| 24 | #include <stdarg.h> | |
| 25 | ||
| 26 | static inline int __nw_string_vformat(char* s, const size_t length, | |
| 27 | const char* format, va_list args) { | |
| 28 | // Write string to buffer | |
| 29 | const ssize_t required = vsnprintf(s, length, format, args); | |
| 30 | ||
| 31 | // Catch any errors | |
| 32 | if (required < 0) | |
| 33 | return 1; | |
| 34 | ||
| 35 | // Check if the entire string could be written | |
| 36 | if ((size_t)required >= length) { | |
| 37 | errno = ENOMEM; | |
| 38 | return 1; | |
| 39 | } | |
| 40 | ||
| 41 | // Success | |
| 42 | return 0; | |
| 43 | } | |
| 44 | ||
| 45 | #define nw_string_format(s, format, ...) \ | |
| 46 | __nw_string_format(s, sizeof(s), format, __VA_ARGS__) | |
| 47 | ||
| 48 | static inline int __nw_string_format(char* s, const size_t length, | |
| 49 | const char* format, ...) { | |
| 50 | va_list args; | |
| 51 | int r; | |
| 52 | ||
| 53 | // Call __nw_string_vformat | |
| 54 | va_start(args, format); | |
| 55 | r = __nw_string_vformat(s, length, format, args); | |
| 56 | va_end(args); | |
| 57 | ||
| 58 | return r; | |
| 59 | } | |
| 60 | ||
| 61 | #define nw_string_set(s, value) __nw_string_set(s, sizeof(s), value) | |
| 62 | ||
| 63 | static inline int __nw_string_set(char* s, const size_t length, const char* value) { | |
| 64 | // If value is NULL, we will overwrite the buffer with just zeros | |
| 65 | if (!value) { | |
| 66 | for (unsigned int i = 0; i < length; i++) | |
| 67 | s[i] = '\0'; | |
| 68 | ||
| 69 | return 0; | |
| 70 | } | |
| 71 | ||
| 72 | // Otherwise just copy | |
| 73 | return __nw_string_format(s, length, "%s", value); | |
| 74 | } | |
| 75 | ||
| 76 | #endif /* NETWORKD_STRING_H */ |