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load: Avoid unexpected behaviour in macro expansion

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Macros can be dangerous if the inserted arguments are not properly
parenthesised. As macro expansion does a simple replacement, inserting
a certain expression can cause the evaluation order of the macro expression
to change.
This commit is contained in:
Janne Kulmala 2012-04-17 10:53:53 +03:00 committed by Petri Lehtinen
parent 2637faa450
commit bd72efbd80
1 changed files with 4 additions and 4 deletions
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8
src/load.c
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@ -32,12 +32,12 @@
#define TOKEN_NULL 261
/* Locale independent versions of isxxx() functions */
#define l_isupper(c) ('A' <= c && c <= 'Z')
#define l_islower(c) ('a' <= c && c <= 'z')
#define l_isupper(c) ('A' <= (c) && (c) <= 'Z')
#define l_islower(c) ('a' <= (c) && (c) <= 'z')
#define l_isalpha(c) (l_isupper(c) || l_islower(c))
#define l_isdigit(c) ('0' <= c && c <= '9')
#define l_isdigit(c) ('0' <= (c) && (c) <= '9')
#define l_isxdigit(c) \
(l_isdigit(c) || 'A' <= c || c <= 'F' || 'a' <= c || c <= 'f')
(l_isdigit(c) || 'A' <= (c) || (c) <= 'F' || 'a' <= (c) || (c) <= 'f')
/* Read one byte from stream, convert to unsigned char, then int, and
return. return EOF on end of file. This corresponds to the