1 /* $NetBSD: msg_357.c,v 1.1 2024/03/01 19:39:28 rillig Exp $ */ 2 # 3 "msg_357.c" 3 4 // Test for message: hex escape '%.*s' mixes uppercase and lowercase digits [357] 5 6 /* 7 * In the format argument of the snprintb and snprintb_m functions, a bit 8 * position or field width is written as an octal or hexadecimal escape 9 * sequence. If the description that follows starts with hex digits (A-Fa-f), 10 * these digits are still part of the escape sequence instead of the 11 * description. 12 * 13 * Since the escape sequences are typically written in lowercase and the 14 * descriptions are typically written in uppercase, a mixture of both cases 15 * indicates a mismatch. 16 */ 17 18 /* lint1-extra-flags: -X 351 */ 19 20 typedef typeof(sizeof(0)) size_t; 21 typedef unsigned long long uint64_t; 22 23 int snprintb(char*, size_t, const char*, uint64_t); 24 25 void 26 examples(unsigned u32, uint64_t u64) 27 { 28 char buf[64]; 29 30 /* expect+5: warning: hex escape '\x0aB' mixes uppercase and lowercase digits [357] */ 31 /* expect+4: warning: hex escape '\x0aB' has more than 2 digits [358] */ 32 /* expect+3: warning: bit position '\x0aB' (171) in '\x0aBIT' out of range 1..32 [371] */ 33 snprintb(buf, sizeof(buf), 34 "\020\x0aBIT", 35 u32); 36 37 // This mismatch goes undetected as it has only 2 digits, does not mix 38 // case and is in bounds. A spellchecker could mark the unknown word 39 // 'ield' to give a hint. 40 snprintb(buf, sizeof(buf), 41 "\020\x1FIELD", 42 u32); 43 44 /* expect+5: warning: hex escape '\x0aB' mixes uppercase and lowercase digits [357] */ 45 /* expect+4: warning: hex escape '\x0aB' has more than 2 digits [358] */ 46 /* expect+3: warning: bit position '\x0aB' (171) in 'b\x0aBIT\0' out of range 0..63 [371] */ 47 snprintb(buf, sizeof(buf), 48 "\177\020b\x0aBIT\0", 49 u64); 50 } 51