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Updated indentation of n1256.txt for make benefit better generation
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Pragmatic Software
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@ -336,45 +336,45 @@
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2. Each instance of a backslash character (\) immediately followed by a new-line
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character is deleted, splicing physical source lines to form logical source lines.
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Only the last backslash on any physical source line shall be eligible for being part
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of such a splice. A source file that is not empty shall end in a new-line character,
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which shall not be immediately preceded by a backslash character before any such
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splicing takes place.
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3. The source file is decomposed into preprocessing tokens6) and sequences of
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white-space characters (including comments). A source file shall not end in a
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partial preprocessing token or in a partial comment. Each comment is replaced by
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one space character. New-line characters are retained. Whether each nonempty
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sequence of white-space characters other than new-line is retained or replaced by
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one space character is implementation-defined.
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4. Preprocessing directives are executed, macro invocations are expanded, and
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_Pragma unary operator expressions are executed. If a character sequence that
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matches the syntax of a universal character name is produced by token
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concatenation (6.10.3.3), the behavior is undefined. A #include preprocessing
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directive causes the named header or source file to be processed from phase 1
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through phase 4, recursively. All preprocessing directives are then deleted.
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5. Each source character set member and escape sequence in character constants and
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string literals is converted to the corresponding member of the execution character
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set; if there is no corresponding member, it is converted to an implementation-
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defined member other than the null (wide) character.7)
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6. Adjacent string literal tokens are concatenated.
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7. White-space characters separating tokens are no longer significant. Each
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preprocessing token is converted into a token. The resulting tokens are
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syntactically and semantically analyzed and translated as a translation unit.
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8. All external object and function references are resolved. Library components are
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linked to satisfy external references to functions and objects not defined in the
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current translation. All such translator output is collected into a program image
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which contains information needed for execution in its execution environment.
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Forward references: universal character names (6.4.3), lexical elements (6.4),
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preprocessing directives (6.10), trigraph sequences (5.2.1.1), external definitions (6.9).
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2. Each instance of a backslash character (\) immediately followed by a new-line
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character is deleted, splicing physical source lines to form logical source lines.
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Only the last backslash on any physical source line shall be eligible for being part
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of such a splice. A source file that is not empty shall end in a new-line character,
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which shall not be immediately preceded by a backslash character before any such
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splicing takes place.
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3. The source file is decomposed into preprocessing tokens6) and sequences of
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white-space characters (including comments). A source file shall not end in a
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partial preprocessing token or in a partial comment. Each comment is replaced by
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one space character. New-line characters are retained. Whether each nonempty
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sequence of white-space characters other than new-line is retained or replaced by
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one space character is implementation-defined.
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4. Preprocessing directives are executed, macro invocations are expanded, and
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_Pragma unary operator expressions are executed. If a character sequence that
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matches the syntax of a universal character name is produced by token
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concatenation (6.10.3.3), the behavior is undefined. A #include preprocessing
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directive causes the named header or source file to be processed from phase 1
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through phase 4, recursively. All preprocessing directives are then deleted.
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5. Each source character set member and escape sequence in character constants and
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string literals is converted to the corresponding member of the execution character
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set; if there is no corresponding member, it is converted to an implementation-
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defined member other than the null (wide) character.7)
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6. Adjacent string literal tokens are concatenated.
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7. White-space characters separating tokens are no longer significant. Each
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preprocessing token is converted into a token. The resulting tokens are
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syntactically and semantically analyzed and translated as a translation unit.
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8. All external object and function references are resolved. Library components are
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linked to satisfy external references to functions and objects not defined in the
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current translation. All such translator output is collected into a program image
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which contains information needed for execution in its execution environment.
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Forward references: universal character names (6.4.3), lexical elements (6.4),
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preprocessing directives (6.10), trigraph sequences (5.2.1.1), external definitions (6.9).
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6) As described in 6.4, the process of dividing a source file's characters into preprocessing tokens is
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context-dependent. For example, see the handling of < within a #include preprocessing directive.
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7) An implementation need not convert all non-corresponding source characters to the same execution
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character.
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6) As described in 6.4, the process of dividing a source file's characters into preprocessing tokens is
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context-dependent. For example, see the handling of < within a #include preprocessing directive.
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7) An implementation need not convert all non-corresponding source characters to the same execution
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character.
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@ -5427,26 +5427,26 @@ Forward references: conditional inclusion (6.10.1), complex arithmetic
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label in the enclosing function.
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3 EXAMPLE 1 It is sometimes convenient to jump into the middle of a complicated set of statements. The
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following outline presents one possible approach to a problem based on these three assumptions:
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1. The general initialization code accesses objects only visible to the current function.
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2. The general initialization code is too large to warrant duplication.
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3. The code to determine the next operation is at the head of the loop. (To allow it to be reached by
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continue statements, for example.)
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/* ... */
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goto first_time;
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for (;;) {
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// determine next operation
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/* ... */
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if (need to reinitialize) {
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// reinitialize-only code
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/* ... */
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first_time:
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// general initialization code
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/* ... */
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continue;
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}
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// handle other operations
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/* ... */
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}
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1. The general initialization code accesses objects only visible to the current function.
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2. The general initialization code is too large to warrant duplication.
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3. The code to determine the next operation is at the head of the loop. (To allow it to be reached by
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continue statements, for example.)
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/* ... */
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goto first_time;
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for (;;) {
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// determine next operation
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/* ... */
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if (need to reinitialize) {
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// reinitialize-only code
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/* ... */
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first_time:
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// general initialization code
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/* ... */
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continue;
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}
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// handle other operations
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/* ... */
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}
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@ -6290,7 +6290,7 @@ Forward references: conditional inclusion (6.10.1), complex arithmetic
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causes the implementation to behave as if the following sequence of source lines begins
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with a source line that has a line number as specified by the digit sequence (interpreted as
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a decimal integer). The digit sequence shall not specify zero, nor a number greater than
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2147483647.
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2147483647.
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4 A preprocessing directive of the form
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# line digit-sequence "s-char-sequenceopt" new-line
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sets the presumed line number similarly and changes the presumed name of the source
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@ -10627,6 +10627,11 @@ f,F A double argument representing a floating-point number is converte
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any n-char-sequence, is implementation-defined. The F conversion specifier
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produces INF, INFINITY, or NAN instead of inf, infinity, or nan,
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respectively.243)
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243) When applied to infinite and NaN values, the -, +, and space flag characters have their usual meaning;
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the # and 0 flag characters have no effect.
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e,E A double argument representing a floating-point number is converted in the
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style [-]d.ddd e±dd, where there is one digit (which is nonzero if the
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argument is nonzero) before the decimal-point character and the number of
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@ -10648,12 +10653,6 @@ g,G A double argument representing a floating-point number is converte
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P - (X + 1).
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-- otherwise, the conversion is with style e (or E) and precision P - 1.
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Finally, unless the # flag is used, any trailing zeros are removed from the
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243) When applied to infinite and NaN values, the -, +, and space flag characters have their usual meaning;
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the # and 0 flag characters have no effect.
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fractional portion of the result and the decimal-point character is removed if
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there is no fractional portion remaining.
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A double argument representing an infinity or NaN is converted in the style
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@ -10686,13 +10685,13 @@ s If no l length modifier is present, the argument shall be a pointe
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element of an array of character type.246) Characters from the array are
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244) Binary implementations can choose the hexadecimal digit to the left of the decimal-point character so
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that subsequent digits align to nibble (4-bit) boundaries.
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245) The precision p is sufficient to distinguish values of the source type if 16 p-1 > b n where b is
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FLT_RADIX and n is the number of base-b digits in the significand of the source type. A smaller p
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might suffice depending on the implementation's scheme for determining the digit to the left of the
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decimal-point character.
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246) No special provisions are made for multibyte characters.
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244) Binary implementations can choose the hexadecimal digit to the left of the decimal-point character so
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that subsequent digits align to nibble (4-bit) boundaries.
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245) The precision p is sufficient to distinguish values of the source type if 16 p-1 > b n where b is
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FLT_RADIX and n is the number of base-b digits in the significand of the source type. A smaller p
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might suffice depending on the implementation's scheme for determining the digit to the left of the
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decimal-point character.
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246) No special provisions are made for multibyte characters.
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@ -10758,7 +10757,7 @@ s If no l length modifier is present, the argument shall be a pointe
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if an output or encoding error occurred.
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Environmental limits
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15 The number of characters that can be produced by any single conversion shall be at least
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4095.
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4095.
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16 EXAMPLE 1 To print a date and time in the form ``Sunday, July 3, 10:02'' followed by to five decimal
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places:
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#include <math.h>
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@ -10940,9 +10939,9 @@ s Matches a sequence of non-white-space characters.252)
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If an l length modifier is present, the input shall be a sequence of multibyte
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252) No special provisions are made for multibyte characters in the matching rules used by the c, s, and [
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conversion specifiers -- the extent of the input field is determined on a byte-by-byte basis. The
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resulting field is nevertheless a sequence of multibyte characters that begins in the initial shift state.
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252) No special provisions are made for multibyte characters in the matching rules used by the c, s, and [
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conversion specifiers -- the extent of the input field is determined on a byte-by-byte basis. The
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resulting field is nevertheless a sequence of multibyte characters that begins in the initial shift state.
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@ -13509,10 +13508,10 @@ a,A A double argument representing a floating-point number is converted
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is missing and FLT_RADIX is a power of 2, then the precision is sufficient
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283) When applied to infinite and NaN values, the -, +, and space flag wide characters have their usual
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meaning; the # and 0 flag wide characters have no effect.
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284) Binary implementations can choose the hexadecimal digit to the left of the decimal-point wide
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character so that subsequent digits align to nibble (4-bit) boundaries.
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283) When applied to infinite and NaN values, the -, +, and space flag wide characters have their usual
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meaning; the # and 0 flag wide characters have no effect.
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284) Binary implementations can choose the hexadecimal digit to the left of the decimal-point wide
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character so that subsequent digits align to nibble (4-bit) boundaries.
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@ -13551,10 +13550,10 @@ s If no l length modifier is present, the argument shall be a pointer
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p The argument shall be a pointer to void. The value of the pointer is
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converted to a sequence of printing wide characters, in an implementation-
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285) The precision p is sufficient to distinguish values of the source type if 16 p-1 > b n where b is
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FLT_RADIX and n is the number of base-b digits in the significand of the source type. A smaller p
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might suffice depending on the implementation's scheme for determining the digit to the left of the
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decimal-point wide character.
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285) The precision p is sufficient to distinguish values of the source type if 16 p-1 > b n where b is
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FLT_RADIX and n is the number of base-b digits in the significand of the source type. A smaller p
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might suffice depending on the implementation's scheme for determining the digit to the left of the
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decimal-point wide character.
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@ -13829,15 +13828,15 @@ n No input is consumed. The corresponding argument shall be a pointer to
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thompson\0.
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18 EXAMPLE 2 The call:
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#include <stdio.h>
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#include <wchar.h>
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/* ... */
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int i; float x; double y;
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fwscanf(stdin, L"%2d%f%*d %lf", &i, &x, &y);
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with input:
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56789 0123 56a72
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will assign to i the value 56 and to x the value 789.0, will skip past 0123, and will assign to y the value
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56.0. The next wide character read from the input stream will be a.
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#include <stdio.h>
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#include <wchar.h>
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/* ... */
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int i; float x; double y;
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fwscanf(stdin, L"%2d%f%*d %lf", &i, &x, &y);
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with input:
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56789 0123 56a72
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will assign to i the value 56 and to x the value 789.0, will skip past 0123, and will assign to y the value
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56.0. The next wide character read from the input stream will be a.
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290) See ``future library directions'' (7.26.12).
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@ -14268,7 +14267,7 @@ n No input is consumed. The corresponding argument shall be a pointer to
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4 If the subject sequence has the expected form for a floating-point number, the sequence of
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wide characters starting with the first digit or the decimal-point wide character
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(whichever occurs first) is interpreted as a floating constant according to the rules of
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6.4.4.2, except that the decimal-point wide character is used in place of a period, and that
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6.4.4.2, except that the decimal-point wide character is used in place of a period, and that
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if neither an exponent part nor a decimal-point wide character appears in a decimal
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floating point number, or if a binary exponent part does not appear in a hexadecimal
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floating point number, an exponent part of the appropriate type with value zero is
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