| 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* |
| 3 | * From lib/cmdline.c |
| 4 | */ |
| 5 | #include <stdlib.h> |
| 6 | |
| 7 | #if __has_attribute(__fallthrough__) |
| 8 | # define fallthrough __attribute__((__fallthrough__)) |
| 9 | #else |
| 10 | # define fallthrough do {} while (0) /* fallthrough */ |
| 11 | #endif |
| 12 | |
| 13 | unsigned long long memparse(const char *ptr, char **retptr) |
| 14 | { |
| 15 | char *endptr; /* local pointer to end of parsed string */ |
| 16 | |
| 17 | unsigned long long ret = strtoll(ptr, &endptr, 0); |
| 18 | |
| 19 | switch (*endptr) { |
| 20 | case 'E': |
| 21 | case 'e': |
| 22 | ret <<= 10; |
| 23 | fallthrough; |
| 24 | case 'P': |
| 25 | case 'p': |
| 26 | ret <<= 10; |
| 27 | fallthrough; |
| 28 | case 'T': |
| 29 | case 't': |
| 30 | ret <<= 10; |
| 31 | fallthrough; |
| 32 | case 'G': |
| 33 | case 'g': |
| 34 | ret <<= 10; |
| 35 | fallthrough; |
| 36 | case 'M': |
| 37 | case 'm': |
| 38 | ret <<= 10; |
| 39 | fallthrough; |
| 40 | case 'K': |
| 41 | case 'k': |
| 42 | ret <<= 10; |
| 43 | endptr++; |
| 44 | fallthrough; |
| 45 | default: |
| 46 | break; |
| 47 | } |
| 48 | |
| 49 | if (retptr) |
| 50 | *retptr = endptr; |
| 51 | |
| 52 | return ret; |
| 53 | } |
| 54 | |