osd@hou2d.UUCP (Orlando Sotomayor-Diaz) (05/15/86)
From: Orlando Sotomayor-Diaz (The Moderator) <cbosgd!std-c>
mod.std.c Digest Thu, 15 May 86 Volume 16 : Issue 15
Today's Topics:
MORE C standard differences Apr85-Feb86, part 5 of 9
----------------------------------------------------------------------
Date:
From: ihnp4!utzoo!lsuc!msb
Subject: MORE C standard differences Apr85-Feb86, part 5 of 9
To: utzoo!ihnp4!hou2d!osd
# D.10.1.1 The atof function
<--O If the value cannot be represented, the behavior is undefined.
<--O It the string starts with an unrecognized character, zero is re-
<--O turned.
Remark: And likewise for atoi (#D.10.1.2) and atol (#D.10.1.3).
# D.10.1.2 The atoi function
<--O The function recognizes an optional sequence of white-space char-
<--O acters, then an optional plus or minus sign, then a sequence of
<--O digits. The first unrecognized character ends the conversion.
<--O The sequence of digits is interpreted by the same rules as for a
<--O decimal integer constant.
N--> Except for the behavior on error, it is equivalent to
N--> (int)strtol(nptr, (char **)NULL, 10)
N--> ... Forward references: the strtol function (#D.10.1.5).
Remark: Likewise for atol (#D.10.1.3), except with no (int) cast.
# D.10.1.4 The strtod function
The function recognizes an optional leading sequence of white-
* space characters {--> (as specified by the isspace function)},
...
N--> If an unrecognized character occurs before the first digit fol-
N--> lowing the e or E, the exponent is taken to be zero. ...
* If {the string starts with -->} an unrecognized character {-->
* occurs before any digit}, zero is returned {-->, and errno is set
to EDOM}.
# D.10.1.4 The strtod function
<--O The string is interpreted by the same rules as a floating con-
<--O stant.
N--> The sequence of characters from the first digit or the decimal
N--> point (whichever occurs first) to the character before the first
N--> unrecognized character is interpreted as a floating constant ac-
N--> cording to the rules of #C.1.3.1, except that if neither an ex-
N--> ponent part nor a decimal point appears, a decimal point is as-
N--> sumed to follow the last digit in the string. If a minus sign
N--> appears immediately before the first digit, the value resulting
N--> from the conversion is negated.
# D.10.1.5 The strtol function
The function recognizes an optional leading sequence of white-
* space characters {--> (as specified by the isspace function)},
...
* If {the string starts with -->} an unrecognized character {-->
occurs before the first recognized digit or letter}, zero is re-
* turned {-->, and errno is set to EDOM}.
# D.10.1.5 The strtol function
* If the value of base is 0, the sequence of {digits --> characters
from the first digit to the character before the first unrecog-
* nized character} is interpreted {by the same rules -->} as {for
* -->} an integer constant {--> according to the rules of
* #C.1.3.2}. {After the optional sign, a leading zero indicates
octal conversion, and a leading 0x or 0X hexadecimal conversion.
Otherwise, decimal conversion is used. --> If a minus sign ap-
pears immediately before the first digit, the value resulting
from the conversion is negated.}
If the value of base is between 2 and 36, it is used as the base
* for conversion. {--> Letters from a (or A) through z (or Z) are
ascribed the values 10 to 35; a letter whose value is greater
than or equal to the value of base ends the conversion.} Leading
* zeros after the optional sign are ignored, and {--> leading} 0x
* or 0X is ignored if the value of base is 16. {--> If a minus
sign appears immediately before the first digit or letter, the
value resulting from the conversion is negated.}
# D.10.2.1 The rand function
The rand function computes a sequence of pseudo-random integers
* in the range 0 to {32767 --> RAND_MAX} {using the specified
linear multiplicative algorithm, which has a period of 2 raised
to the power 32 -->}.
# D.10.2.1 The rand function
* The following functions define {the required semantics --> a
portable implementation} of rand and srand. ...
* int rand({--> void})
...
<--O void srand(seed)
<--O unsigned int seed;
N--> void srand(unsigned int seed)
# D.10.3 Memory management functions
N--> The pointer returned if the allocation succeeds is suitably
N--> aligned so that it may be assigned to a pointer to any type of
N--> object and then used to access such an object in the space allo-
N--> cated (until the space is explicitly freed or reallocated).
# D.10.3.1 The calloc function
* void *calloc({unsigned int --> size_t} nelem,
size_t size);
# D.10.3.1 The calloc function
<--O The pointer returned may safely be case to point to an object of
<--O any type.
Remark: Likewise for malloc (#D.10.3.3) and realloc (#D.10.3.4).
# D.10.3.1 The calloc function
* If the space cannot be allocated, {--> or if nelem or size is
zero,} the calloc function returns a null pointer.
# D.10.3.2 The free function
N--> If ptr is a null pointer, no action occurs.
# D.10.3.4 The realloc function
N--> If ptr is a null pointer, the realloc function behaves like the
N--> malloc function for the specified size. ...
If size is zero, the realloc function returns a null pointer and
the object pointed to by ptr is freed.
# D.10.4.1 The abort function
* Unless the signal SIGABRT is being {--> cuaght or} ignored, the
abort function causes abnormal program termination to occur.
# D.10.4.1 The abort function
If the signal SIGABRT is being ignored, the abort function re-
* turns no value. {--> Otherwise, the abort function cannot return
to its caller.}
Remark: I assume "caught or ignored" is meant.
# D.10.4.2 The exit function
<--O If a registered function fails to return as its value the value
<--O returned by the call to the onexit function by means of which it
<--O was registered, the behavior is undefined.
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End of mod.std.c Digest - Thu, 15 May 86 13:31:09 EDT
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