4.1.4
C99 language function
This section describes the C99 language functions supported by the CC-RL.
Text from two slashes (//) until a newline character is a comment. If there is a backslash character (\) immediately before the newline, then the next line is treated as a continuation of the current comment.
(2) | Concatenating wide string literal |
The result of concatenating a character string literal with a wide string literal is a wide string literal.
_Bool type is supported.
_Bool type is a 1-byte integer type that holds only 0 or 1.
When the -ansi option is specified, _Bool type is not supported and it generates a compilation error.
long long int type is supported. long long int type is an 8-byte integer type.
Appending "LL" and "ULL" to a constant value is also supported. It is also possible to specify this for bit field types.
When the -ansi option is specified, the long long int type is not supported and it generates a compilation error.
In accordance with support for types _Bool and long long, integer promotion is also in accordance with the C99 specification.
When the -ansi option is specified, _Bool type and long long type is not supported and integer promotion is in accordance with the C90 specification.
(6) | Aggregate initialization |
The initializer for an aggregate or union type object that has automatic storage duration conforms to the C99 specifications.
In the C90 specifications, only a constant expression is allowed for an initializer, but other expressions can be used in CC-RL.
void func(int param) {
int i = param; //Allowed both in C90 and C99
int array[] = { param }; //Not allowed in C90, allowed in C99, and
//allowed in CC-RL
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(7) | Default argument promotions |
In accordance with support for types _Bool and long long, default argument promotions is also in accordance with the C99 specification..
- | Functions are called after expanding type _Bool_ to type int (2 bytes). |
- | Functions are called with type (unsigned) long long remaining as an 8 bytes value. |
- | When the option -dbl_size=4 is used, functions are called with type float remaining 4 bytes.
This is because as a result of this option, even if a float is promoted to a double, the double type will have 4 bytes (same as the float type). |
A near pointer is converted to a far pointer.
void* conforms to the rules for variable pointers.
(8) | Comma permission behind the last enumerator of a enum definition |
When defining an enum type, it is permissible for the last enumerator in the enumeration to be followed by a comma (,).
When the -ansi option is specified, this comma will generate an error.
(9) | Types of integer constants |
In accordance with the addition of type long long, the types of integer constants are as follows.
The type of an integer constant will be the first type in the lists below capable of representing that value.
Table 4.5 | Types of Integer Constants (If type long long is enabled (when -ansi is not specified)) |
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None
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int
long int
unsigned long intNote
long long int
unsigned long long int
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int
unsigned int
long int
unsigned long int
long long int
unsigned long long int
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u or U
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unsigned int
unsigned long int
unsigned long long int
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unsigned int
unsigned long int
unsigned long long int
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l or L
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long int
unsigned long intNote
long long int
unsigned long long int
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long int
unsigned long int
long long int
unsigned long long int
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Both u or U, and l or L
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unsigned long int
unsigned long long int
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unsigned long int
unsigned long long int
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ll or LL
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long long int
unsigned long long int
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long long int
unsigned long long int
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Both u or U, and ll or LL
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unsigned long long int
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unsigned long long int
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Note | Different from C99 specification. This is added to avoid the case where an integer constant represented as 4-byte data in C90 is unexpectedly represented as 8-byte data. |
Table 4.6 | Types of Integer Constants (If type long long is disabled (when -ansi is specified)) |
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None
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int
long int
unsigned long int
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int
unsigned int
long int
unsigned long int
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u or U
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unsigned int
unsigned long int
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unsigned int
unsigned long int
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l or L
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long int
unsigned long int
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long int
unsigned long int
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Both u or U, and l or L
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unsigned long int
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unsigned long int
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(10) | Addition of standard header |
Standard header stdint.h is added, which defines the following types.
Table 4.7 | Type Definition Names in stdint.h |
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int8_t
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signed char
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int16_t
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signed short
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int32_t
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signed long
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int64_t
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signed long long
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When -ansi is not used
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uint8_t
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unsigned char
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uint16_t
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unsigned short
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uint32_t
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unsigned long
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uint64_t
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unsigned long long
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When -ansi is not used
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int_least8_t
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signed char
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int_least16_t
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signed short
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int_least32_t
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signed long
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int_least64_t
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signed long long
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When -ansi is not used
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uint_least8_t
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unsigned char
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uint_least16_t
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unsigned short
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uint_least32_t
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unsigned long
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uint_least64_t
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unsigned long long
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When -ansi is not used
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int_fast8_t
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signed char
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int_fast16_t
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signed short
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int_fast32_t
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signed long
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int_fast64_t
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signed long long
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When -ansi is not used
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uint_fast8_t
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unsigned char
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uint_fast16_t
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unsigned short
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uint_fast32_t
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unsigned long
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uint_fast64_t
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unsigned long long
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When -ansi is not used
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intptr_t
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signed long
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uintptr_t
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unsigned long
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intmax_t
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signed long
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When -ansi is used
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signed long long
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When -ansi is not used
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uintmax_t
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unsigned long
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When -ansi is used
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unsigned long long
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When -ansi is not used
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stdint.h defines the following macros.
Table 4.8 | Macro Definition Names in stdint.h |
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INT8_MIN
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-128
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INT16_MIN
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-32768
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INT32_MIN
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-2147483648
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INT64_MIN
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-9223372036854775808
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When -ansi is not used
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INT8_MAX
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+127
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INT16_MAX
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+32767
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INT32_MAX
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+2147483647
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INT64_MAX
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+9223372036854775807
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When -ansi is not used
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UINT8_MAX
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+255
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UINT16_MAX
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+65535
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UINT32_MAX
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+4294967295
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UINT64_MAX
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+18446744073709551615
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When -ansi is not used
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INT_LEAST8_MIN
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-128
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INT_LEAST16_MIN
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-32768
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INT_LEAST32_MIN
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-2147483648
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INT_LEAST64_MIN
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-9223372036854775808
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When -ansi is not used
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INT_LEAST8_MAX
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+127
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INT_LEAST16_MAX
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+32767
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INT_LEAST32_MAX
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+2147483647
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INT_LEAST64_MAX
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+9223372036854775807
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When -ansi is not used
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UINT_LEAST8_MAX
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+255
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UINT_LEAST16_MAX
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+65535
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UINT_LEAST32_MAX
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+4294967295
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UINT_LEAST64_MAX
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+18446744073709551615
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When -ansi is not used
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INT_FAST8_MIN
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-128
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INT_FAST16_MIN
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-32768
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INT_FAST32_MIN
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-2147483648
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INT_FAST64_MIN
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-9223372036854775808
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When -ansi is not used
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INT_FAST8_MAX
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+127
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INT_FAST16_MAX
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+32767
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INT_FAST32_MAX
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+2147483647
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INT_FAST64_MAX
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+9223372036854775807
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When -ansi is not used
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UINT_FAST8_MAX
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+255
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UINT_FAST16_MAX
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+65535
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UINT_FAST32_MAX
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+4294967295
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UINT_FAST64_MAX
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+18446744073709551615
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When -ansi is not used
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INTPTR_MIN
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-2147483648
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INTPTR_MAX
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+2147483647
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UINTPTR_MAX
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+4294967295
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INTMAX_MIN
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-2147483648
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When -ansi is used
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-9223372036854775808
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When -ansi is not used
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INTMAX_MAX
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+2147483647
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When -ansi is used
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+9223372036854775807
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When -ansi is not used
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UINTMAX_MAX
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+4294967295
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When -ansi is used
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+18446744073709551615
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When -ansi is not used
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PTRDIFF_MIN
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-32768
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PTRDIFF_MAX
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+32767
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SIZE_MAX
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+65535
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The variadic macro is enabled.
#define pf(form, ...) printf(form, __VA_ARGS__)
pf("%s %d\n", "string", 100);
↓
printf("%s %d\n", "string", 100);
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