Epson S5U1C17001C Manual page 80

 Character type determination/conversion functions 
The table below lists the character type determination/conversion functions included in libc.a.
Header file: ctype.h
Function
int isalnum(int c);
int isalpha(int c);
int iscntrl(int c);
int isdigit(int c);
int isgraph(int c);
int islower(int c);
int isprint(int c);
int ispunct(int c);
int isspace(int c);
int isupper(int c);
int isxdigit(int c);
int tolower(int c);
int toupper(int c);
 Variable argument macros

The table below lists the variable argument macros defined in stdarg.h.
Header file: stdarg.h
Macro
void va_start(va_list ap, type lastarg);
type va_arg(va_list ap, type);
void va_end(va_list ap);
S5U1C17001C Manual
(Rev. 1.0)
Table 5.4.2.7 Character type determination/conversion functions
Determine character type
(decimal or alphabet).
Determine character type
(alphabet).
Determine character type
(control character).
Determine character type
(decimal).
Determine character type
(graphic character).
Determine character type
(lowercase alphabet).
Determine character type
(printable character).
Determine character type
(delimiter).
Determine character type (null
character).
Determine character type
(uppercase alphabet).
Determine character type
(hexadecimal).
Convert character type
(uppercase alphabet →
lowercase).
Convert character type
(lowercase alphabet →
uppercase).
Table 5.4.2.8 Variable argument macros
Initialize the variable argument group.
Return the actual argument.
Return normally from the variable argument function.
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Functionality Reentrant
Reentrant
Reentrant
Reentrant
Reentrant
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Reentrant
Reentrant
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Functionality
5 Library
Notes
5-16