source:
trunk/sys/dietlibc/isalnum.c
@
339
| Last change on this file since 339 was 1, checked in by , 8 years ago | |
|---|---|
| File size: 140 bytes | |
| Line | |
|---|---|
| 1 | #include <ctype.h> |
| 2 | |
| 3 | int isalnum(int ch) { |
| 4 | return (unsigned int)((ch | 0x20) - 'a') < 26u || |
| 5 | (unsigned int)( ch - '0') < 10u; |
| 6 | } |
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