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Improve comments and fix ascii_* attributes

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This commit is contained in:
Felipe Oliveira Carvalho
2015-04-23 00:03:36 -03:00
parent bcfc37ea98
commit c96b933acc
6 changed files with 34 additions and 28 deletions
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46
src/nvim/ascii.h
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@@ -9,7 +9,8 @@
#define NVIM_ASCII_H
#include <stdbool.h>
#include "func_attr.h"
#include "nvim/func_attr.h"
// Definitions of various common control characters.
@@ -90,32 +91,36 @@
# define PATHSEPSTR "/"
#endif
static inline bool ascii_iswhite(int c) FUNC_ATTR_ALWAYS_INLINE FUNC_ATTR_CONST;
static inline bool ascii_isdigit(int c) FUNC_ATTR_ALWAYS_INLINE FUNC_ATTR_CONST;
static inline bool ascii_isxdigit(int c) FUNC_ATTR_ALWAYS_INLINE FUNC_ATTR_CONST;
static inline bool ascii_isspace(int x) FUNC_ATTR_ALWAYS_INLINE FUNC_ATTR_CONST;
static inline bool ascii_iswhite(int) REAL_FATTR_ALWAYS_INLINE REAL_FATTR_CONST;
static inline bool ascii_isdigit(int) REAL_FATTR_ALWAYS_INLINE REAL_FATTR_CONST;
static inline bool ascii_isxdigit(int) REAL_FATTR_ALWAYS_INLINE REAL_FATTR_CONST;
static inline bool ascii_isspace(int) REAL_FATTR_ALWAYS_INLINE REAL_FATTR_CONST;
/// ascii_iswhite() is used for "^" and the like. It differs from isspace()
/// because it doesn't include <CR> and <LF> and the like.
/// Checks if `c` is a space or tab character.
///
/// @see {ascii_isdigit}
static inline bool ascii_iswhite(int c)
{
return c == ' ' || c == '\t';
}
/// Use our own isdigit() replacement, because on MS-Windows isdigit() returns
/// non-zero for superscript 1. Also avoids that isdigit() crashes for numbers
/// below 0 and above 255.
/// Check whether character is a decimal digit.
///
/// Library isdigit() function is officially locale-dependent and, for
/// example, returns true for superscript 1 (¹) in locales where encoding
/// contains it in lower 8 bits. Also avoids crashes in case c is below
/// 0 or above 255: library functions are officially defined as accepting
/// only EOF and unsigned char values (otherwise it is undefined behaviour)
/// what may be used for some optimizations (e.g. simple `return
/// isdigit_table[c];`).
static inline bool ascii_isdigit(int c)
{
return c >= '0' && c <= '9';
}
/// Variant of isxdigit() that can handle characters > 0x100.
/// We don't use isxdigit() here, because on some systems it also considers
/// superscript 1 to be a digit.
/// Checks if `c` is a hexadecimal digit, that is, one of 0-9, a-f, A-F.
///
/// @param c
/// @return TRUE if the character is a hexadecimal digit.
/// @see {ascii_isdigit}
static inline bool ascii_isxdigit(int c)
{
return (c >= '0' && c <= '9')
@@ -123,12 +128,13 @@ static inline bool ascii_isxdigit(int c)
|| (c >= 'A' && c <= 'F');
}
/// Vim has its own isspace() function, because on some machines isspace()
/// can't handle characters above 128.
static inline bool ascii_isspace(int x)
/// Checks if `c` is a white-space character, that is,
/// one of \f, \n, \r, \t, \v.
///
/// @see {ascii_isdigit}
static inline bool ascii_isspace(int c)
{
return (x >= 9 && x <= 13) || x == ' ';
return (c >= 9 && c <= 13) || c == ' ';
}
#endif /* NVIM_ASCII_H */