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introduce 'lwip_tolower' and use it in dns.c

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Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
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Simon Goldschmidt
2018-06-13 15:08:11 +02:00
parent 66f7f06601
commit a9d6ea5953
2 changed files with 4 additions and 2 deletions
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3
src/include/lwip/arch.h
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@@ -221,12 +221,15 @@ typedef int ssize_t;
#define lwip_isxdigit(c) (lwip_isdigit(c) || lwip_in_range((c), 'a', 'f') || lwip_in_range((c), 'A', 'F'))
#define lwip_islower(c) lwip_in_range((c), 'a', 'z')
#define lwip_isspace(c) ((c) == ' ' || (c) == '\f' || (c) == '\n' || (c) == '\r' || (c) == '\t' || (c) == '\v')
#define lwip_isupper(c) lwip_in_range((c), 'A', 'Z')
#define lwip_tolower(c) (lwip_isupper(c) ? (c) - 'A' + 'a' : c)
#else
#include <ctype.h>
#define lwip_isdigit(c) isdigit((unsigned char)(c))
#define lwip_isxdigit(c) isxdigit((unsigned char)(c))
#define lwip_islower(c) islower((unsigned char)(c))
#define lwip_isspace(c) isspace((unsigned char)(c))
#define lwip_tolower(c) tolower(c)
#endif
/** C++ const_cast<target_type>(val) equivalent to remove constness from a value (GCC -Wcast-qual) */