some more corrections
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1 changed files with 26 additions and 18 deletions
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@ -82,7 +82,10 @@ unchanged.
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The result of bitwise operations on signed integers are what can be
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expected on a 2-complement machine.
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.IP -
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The sign of the remainder on integer division is machine dependent.
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If either operand is negative, whether the result of the / operator is the
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largest integer less than or equal to the algebraic quotient or the
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smallest integer greater than or equal to the algebraic quotient is machine
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dependent, as is the sign of the result of the % operator.
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.IP -
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The right-shift of a negative value is negative.
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.NS A.6.3.6
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@ -95,9 +98,8 @@ Truncation is always to the nearest floating-point number that can
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be represented.
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.NS A.6.3.7
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.IP -
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When a pointer is as large as an integer, the type of the sizeof-operator is
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'unsigned int', otherwise it is 'unsigned long'. The compiler will not
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run when a pointer fits in neither.
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The type returned by the sizeof-operator is 'unsigned int'. This is done
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for backward compatibility reasons.
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.IP -
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Casting an integer to a pointer or vice versa has no effect in
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bit-pattern when the sizes are equal. Otherwise the value will be
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@ -125,7 +127,7 @@ alignment is passed on to the compiler by the 'ack' program. When a
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user wants to do this manually, he/she should be prepared for trouble.
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.IP -
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A "plain" 'int' bit-field is taken as a 'signed int'. This means that
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a field with size 1 can only store the values 0 and -1.
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a field with a size 1 bit can only store the values 0 and -1.
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.IP -
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The order of allocation of bit-fields is a compile-time option. By
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default, high-order bits are allocated first.
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@ -133,20 +135,18 @@ default, high-order bits are allocated first.
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An enum has the same size as a "plain" 'int'.
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.NS A.6.3.10
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.IP -
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An access to a volatile object is either a load or a store. Just
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mentioning a volatile variable is not enough.
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E.g. the statement "x;" where x is declared volatile, does not
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constitute an access. When a volatile object should be read, but its
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value ignored, "if (x);" should do the trick.
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.NS A.6.3.11
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An access to a volatile declared variable is done by just mentioning
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the variable. E.g. the statement "x;" where x is declared volatile,
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constitutes an access.
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.S A.6.3.11
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.IP -
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There is no fixed limit on the number of declarators that may modify an
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arithmetic, structure or union type, although specifying too many may
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cause the compiler ro run out of memory.
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cause the compiler to run out of memory.
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.NS A.6.3.12
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.IP -
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The maximum number of cases in a switch-statement is in the order of
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1e9, although the compile may run out of memory somewhat earlier.
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1e9, although the compiler may run out of memory somewhat earlier.
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.NS A.6.3.13
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.IP -
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Since both the pre-processor and the compiler assume ASCII-characters,
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@ -155,12 +155,12 @@ matches the same value in the execution character set.
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.IP -
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The pre-processor recognizes -I... command-line options. The
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directories thus specified are searched first. After that, depending on the
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command that the preprocessor is call with, machine/system-dependant
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command that the preprocessor is called with, machine/system-dependant
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directories are searched. After that, ~em/include/_tail_ac and
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/usr/include are visited.
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.IP -
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Quoted names are looked for in the directory in which the file currently
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being compiled resides.
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Quoted names are first looked for in the directory in which the file
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which does the include resides.
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.IP -
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The characters in a h- or q- char-sequence are taken to be UNIX
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paths.
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@ -180,6 +180,7 @@ The diagnostic printed by 'assert' is as follows:
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.br
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where <expr> is the argument to the assert macro, printed as string.
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(the <file> and <line> should be clear)
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.KS
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.IP -
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The sets for character test macros.
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.TS
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@ -192,6 +193,11 @@ islower() a-z
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isupper() A-Z
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isprint() <space>-~ (== \e040-\e176)
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.TE
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.KE
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As an addition, there is an isascii() macro, which tests whether a character
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is an ascii character. Characters in the range from \e000 to \e177 are ascii
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characters.
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.KS
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.IP -
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The behaviour of mathematic functions on domain error:
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.TS
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@ -207,6 +213,7 @@ log10() -HUGE_VAL
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pow() 0.0
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sqrt() 0.0
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.TE
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.KE
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.IP -
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Underflow range errors do not cause errno to be set.
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.IP -
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@ -237,7 +244,7 @@ The buffering intended by the standard is fully supported.
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A zero-length file actually exists.
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.IP -
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A file name can consist of any character, except for the '\e0' and
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the '\e'.
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the '/'.
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.IP -
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A file can be open multiple times.
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.IP -
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@ -259,7 +266,8 @@ scanlist for %[ conversion is taken to be a range indicator. When the
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first character has a higher ASCII-value than the second, the - will
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just be put into the scanlist.
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.IP -
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The value of errno is that of lseek(). This means:
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The value of errno when fgetpos() or ftell() failed is that of lseek().
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This means:
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.RS
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.IP "EBADF \-" 10
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when the stream is not valid
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