OpenVMS RTL Library (LIB$) Manual

Updated: 11 December 1998

OpenVMS RTL Library (LIB$) Manual

Contents

Index

LIB$WAIT

The Wait a Specified Period of Time routine places the current process into hibernation for the number of seconds specified in its argument.

Format

LIB$WAIT seconds [,flags] [,float-type]

RETURNS

OpenVMS usage: cond_value

type: longword (unsigned)

access: write only

mechanism: by value

Arguments

seconds

OpenVMS usage: floating_point

type: F_floating

access: read only

mechanism: by reference

The number of seconds to wait. The seconds argument contains the address of an F-floating number that is this number.
The value is rounded to the nearest hundredth-second before use. Seconds must be between 0.0 and 100,000.0.
flags

OpenVMS usage: mask_longword

type: longword (unsigned)

access: read only

mechanism: by reference

Control flags. The flags argument is the address of a longword integer that contains the control flags. The following flag is defined:

Bit Value Description

0 LIB$K_NOWAKE LIB$WAIT will not wake in the case of an interrupt.

This is an optional argument. If omitted, the default is 0, and LIB$WAIT will wake in the case of an interrupt.
float-type

OpenVMS usage: longword-unsigned

type: longword (unsigned)

access: read only

mechanism: by reference

Float type. The float-type argument is the address of a longword integer that determines the floating-point type of the seconds argument. Use one of the following symbols:

Symbol Value Floating-Point Type

LIB$K_VAX_F 0 F_floating

LIB$K_VAX_D 1 D_floating

LIB$K_VAX_G 2 G_floating

LIB$K_VAX_H 3 H_floating

LIB$K_IEEE_S 4 IEEE_S_floating

LIB$K_IEEE_T 5 IEEE_T_floating

This is an optional argument. If omitted, the default is F_floating. F_floating is the required float-type when LIB$WAIT is called from a module written in a language that prototypes functions.

Bit	Value	Description
0	LIB$K_NOWAKE	LIB$WAIT will not wake in the case of an interrupt.

Symbol	Value	Floating-Point Type
LIB$K_VAX_F	0	F_floating
LIB$K_VAX_D	1	D_floating
LIB$K_VAX_G	2	G_floating
LIB$K_VAX_H	3	H_floating
LIB$K_IEEE_S	4	IEEE_S_floating
LIB$K_IEEE_T	5	IEEE_T_floating

Description

LIB$WAIT rounds the value specified by seconds to the nearest hundredth-second, uses the $SCHDWK system service to schedule a wakeup for that interval, and then issues the $HIBER system service to hibernate until the wakeup occurs.
Because of other system activity, the length of time that the process actually waits may be somewhat longer than what was specified by seconds.
The process hibernates in the caller's access mode; therefore, asynchronous system traps (ASTs) may be delivered while the process is hibernating. However, if the process hibernates at AST level, further ASTs can not be delivered.
When the LIB$K_NOWAIT control flag is used, LIB$WAIT makes use of the $SETIMR system service to schedule the wakeup, and then issues a $SYNCH system service call to check for the completion status. In this case, LIB$WAIT will not be interrupted by $WAKE. Use LIB$K_NOWAKE when it is necessary for the wait to be completed without interruption.

Note
The NOWAKE option makes use of the $SETIMR and $SYNCH system services. Because use of these services requires that an AST be delivered, you should not use LIB$WAIT with the LIB$K_NOWAKE control flag at AST level.

See the OpenVMS System Services Reference Manual for more information.

Condition Values Returned

SS$_NORMAL Routine successfully completed.

LIB$_INVARG Invalid argument. The value of seconds was less than 0 or greater than 100,000.0

LIB$_WRONUMARG Wrong number of arguments. An incorrect number of arguments was passed to LIB$WAIT.

Any condition values returned by the $SCHDWK or SETIMR system services, or by the RTL routine LIB$CVT_FTOF.

Example


IDENTIFICATION DIVISION. PROGRAM-ID. SAMPLE. DATA DIVISION. WORKING-STORAGE SECTION. 01 DELAY COMP-1. ROUTINE DIVISION. START-SAMPLE. MOVE 3.5 TO DELAY. CALL "LIB$WAIT" USING BY REFERENCE DELAY. STOP RUN.

IDENTIFICATION DIVISION. 
PROGRAM-ID. SAMPLE. 
DATA DIVISION. 
WORKING-STORAGE SECTION. 
01    DELAY COMP-1. 
ROUTINE DIVISION. 
START-SAMPLE. 
    MOVE 3.5 TO DELAY. 
    CALL "LIB$WAIT" 
    USING BY REFERENCE DELAY. 
    STOP RUN.

This COBOL program demonstrates the use of LIB$WAIT. When run, it waits for 3.5 seconds and then exits.

Part 3
CVT$ Reference Section

This part provides a detailed discussion of the routines provided by the OpenVMS RTL (CVT$) Facility.

CVT$CONVERT_FLOAT

The Convert Floating-Point Data Type routine provides a simplified options-interface for converting a floating-point data type to another supported floating-point data type.

Format

CVT$CONVERT_FLOAT input_value, input_type_code, output_value, output_type_code, options

RETURNS

OpenVMS usage: cond_value

type: longword (unsigned)

access: write only

mechanism: by value

Arguments

input_value

OpenVMS usage: varying_arg

type: unspecified

access: read only

mechanism: by reference

The address of a data area containing a floating-point number that is to be converted. The input_value argument may contain floating-point data in F_Floating, D_Floating, G_Floating, H_Floating, IEEE_S_Floating, IEEE_T_Floating, IEEE_X_Floating, IBM_Long_Floating, IBM_Short_Floating, or CRAY_Floating format. The value of the input_type_code argument determines the format and size of the input_value argument.
input_type_code

OpenVMS usage: longword_unsigned

type: longword (unsigned)

access: read only

mechanism: by value

The value of a longword bit mask specifying the type of floating-point data being passed in the input_value argument. Valid type codes are:

input_type_code Format Size in Bytes

CVT$K_VAX_F F_Floating 4

CVT$K_VAX_D D_Floating 8

CVT$K_VAX_G G_Floating 8

CVT$K_VAX_H H_Floating 16

CVT$K_IEEE_S IEEE_S_Floating 4

CVT$K_IEEE_T IEEE_T_Floating 8

CVT$K_IEEE_X IEEE_X_Floating 16

CVT$K_IBM_LONG IBM_Long_Floating 8

CVT$K_IBM_SHORT IBM_Short_Floating 4

CVT$K_CRAY CRAY_Floating 8

Declarations for the input_type_code argument are in the $CVTDEF module found in the system symbol libraries.
output_value

OpenVMS usage: varying_arg

type: unspecified

access: write only

mechanism: by reference

The address of a data area that receives the converted floating-point number. The output_value argument can contain floating-point data in F_Floating, D_Floating, G_Floating, H_Floating, IEEE_S_Floating, IEEE_T_Floating, IEEE_X_Floating, IBM_Long_Floating, IBM_Short_Floating, or CRAY_Floating format. The value of the output_type_code argument determines the size and format of the data placed into the output_value argument.
output_type_code

OpenVMS usage: longword_unsigned

type: longword (unsigned)

access: read only

mechanism: by value

The value of a longword bit mask specifying the type of floating-point data that the input_value argument will be converted into and returned in the output_value argument. Valid type codes are:

output_type_code Format Size in Bytes

CVT$K_VAX_F F_Floating 4

CVT$K_VAX_D D_Floating 8

CVT$K_VAX_G G_Floating 8

CVT$K_VAX_H H_Floating 16

CVT$K_IEEE_S IEEE_S_Floating 4

CVT$K_IEEE_T IEEE_T_Floating 8

CVT$K_IEEE_X IEEE_X_Floating 16

CVT$K_IBM_LONG IBM_Long_Floating 8

CVT$K_IBM_SHORT IBM_Short_Floating 4

CVT$K_CRAY CRAY_Floating 8

Declarations for the output_type_code argument are in the $CVTDEF module found in the system symbol libraries.

options

OpenVMS usage: mask_longword

type: longword (unsigned)

access: read only

mechanism: by value

Conversion option specifier. The options argument is the address of a longword bit mask in which each option bit set causes the corresponding option to be used during the conversion.
The following options can be specified using the options argument:

Option Description

CVT$M_ROUND_TO_NEAREST The default rounding option for conversions to IEEE data types. This IEEE Std. 754 rounding mode results in the representable output value nearest to the infinitely precise result. If the two nearest representable values are equally near, the one whose least significant bit is 0 is the result.

CVT$M_VAX_ROUNDING The default rounding option for conversions to non-IEEE data types. Performs "traditional" style rounding. This mode results in the representable output value nearest to the infinitely precise result. If the two nearest representable values are equally near, the output value is the closest to either positive infinity or negative infinity, depending on the sign of the input value.

CVT$M_TRUNCATE Round the output value toward zero (truncate).

CVT$M_ROUND_TO_POS Round the output value toward positive infinity.

CVT$M_ROUND_TO_NEG Round the output value toward negative infinity.

CVT$M_BIG_ENDIAN Interprets IEEE data types as Big Endian.

CVT$M_ERR_UNDERFLOW Report underflow conditions as errors.

Declarations for the options argument are in the $CVTDEF module found in the system symbol libraries.

input_type_code	Format	Size in Bytes
CVT$K_VAX_F	F_Floating	4
CVT$K_VAX_D	D_Floating	8
CVT$K_VAX_G	G_Floating	8
CVT$K_VAX_H	H_Floating	16
CVT$K_IEEE_S	IEEE_S_Floating	4
CVT$K_IEEE_T	IEEE_T_Floating	8
CVT$K_IEEE_X	IEEE_X_Floating	16
CVT$K_IBM_LONG	IBM_Long_Floating	8
CVT$K_IBM_SHORT	IBM_Short_Floating	4
CVT$K_CRAY	CRAY_Floating	8

output_type_code	Format	Size in Bytes
CVT$K_VAX_F	F_Floating	4
CVT$K_VAX_D	D_Floating	8
CVT$K_VAX_G	G_Floating	8
CVT$K_VAX_H	H_Floating	16
CVT$K_IEEE_S	IEEE_S_Floating	4
CVT$K_IEEE_T	IEEE_T_Floating	8
CVT$K_IEEE_X	IEEE_X_Floating	16
CVT$K_IBM_LONG	IBM_Long_Floating	8
CVT$K_IBM_SHORT	IBM_Short_Floating	4
CVT$K_CRAY	CRAY_Floating	8

Option	Description
CVT$M_ROUND_TO_NEAREST	The default rounding option for conversions to IEEE data types. This IEEE Std. 754 rounding mode results in the representable output value nearest to the infinitely precise result. If the two nearest representable values are equally near, the one whose least significant bit is 0 is the result.
CVT$M_VAX_ROUNDING	The default rounding option for conversions to non-IEEE data types. Performs "traditional" style rounding. This mode results in the representable output value nearest to the infinitely precise result. If the two nearest representable values are equally near, the output value is the closest to either positive infinity or negative infinity, depending on the sign of the input value.
CVT$M_TRUNCATE	Round the output value toward zero (truncate).
CVT$M_ROUND_TO_POS	Round the output value toward positive infinity.
CVT$M_ROUND_TO_NEG	Round the output value toward negative infinity.
CVT$M_BIG_ENDIAN	Interprets IEEE data types as Big Endian.
CVT$M_ERR_UNDERFLOW	Report underflow conditions as errors.

Description

CVT$CONVERT_FLOAT is a general-purpose, floating-point conversion routine that converts any input_type_code floating-point data type into any output_type_code floating-point data type. The conversion is subject to the options specified in the options argument.

Note
OpenVMS compilers do not support arithmetic operations for all of the above floating-point data types. Additional floating-point data types are supported by this routine for data conversion purposes only.

Condition Values Returned

CVT$_NORMAL Normal successful completion.

CVT$_INPCONERR Input conversion error.

CVT$_INVINPTYP Invalid input type code.

CVT$_INVOPT Invalid option argument.

CVT$_INVOUTTYP Invalid output type code.

CVT$_INVVAL Input value was an invalid number or NaN.

CVT$_NEGINF Input value was negative infinity.

CVT$_OUTCONERR Output conversion error.

CVT$_OVERFLOW Overflow detected during conversion.

CVT$_POSINF Input value was positive infinity.

CVT$_UNDERFLOW Underflow detected during conversion.

Return status values are in the $CVTMSG module found in the system symbol libraries.

Example


/* =================================================================== Example of CVT$CONVERT_FLOAT ------------------------------------------------------------------- This example program reads IEEE T floating-point numbers from an input file, converts them to VAX D floating-point numbers and writes the result to an output file. The input and output file names can be specified as the first and second arguments on the command line as follows: $ EXAMPLE IEEE_T_INPUT_FILE.DAT VAX_D_OUTPUT_FILE.DAT If the input or output files are not included on the command line then the program prompts the user for them. ** =================================================================== / #include <stdio.h> unsigned long CVT$CONVERT_FLOAT(void input_value, unsigned long input_type, void output_value, unsigned long output_type, unsigned long options); globalvalue CVT$K_VAX_D; globalvalue CVT$K_IEEE_T; globalvalue CVT$M_ROUND_TO_NEAREST; globalvalue CVT$_NORMAL; main(int argc, char argv[]) { double D_Float_number; unsigned long IEEE_Double_number[2]; unsigned long options; char in_filename[80]; char out_filename[80]; FILE in_file, out_file; unsigned long ret_status; /* Find out where we are going to get the data from. First look at the first argument of the command line. If nothing is there, then attempt to use IEEE_T_IN.DAT. ================================================================= / if (argc == 1) { printf("Enter input data file: [IEEE_T_IN.DAT]: "); if (gets(in_filename) == NULL) exit(1); if (strlen(in_filename) == 0) strcpy(in_filename, "IEEE_T_IN.DAT"); } else strcpy(in_filename, argv[1]); / Find out where we are going to put the output data. First look at the second argument of the command line. If nothing is there, then put it in VAX_D_OUT.DAT ================================================================= / if (argc <= 2) { printf("Enter output data file: [VAX_D_OUT.DAT]: "); if (gets(out_filename) == NULL) exit(1); if (strlen(out_filename) == 0) strcpy(out_filename, "VAX_D_OUT.DAT"); } else strcpy(out_filename, argv[2]); / Open the input and output files. ----------------------------------------------------------------- / if ((in_file = fopen(in_filename, "r")) == NULL) { fprintf(stderr, "%s couldn't open file %s\n", argv[0], in_filename); exit(1); } out_file = fopen(out_filename, "wb"); options = CVT$M_ROUND_TO_NEAREST; ret_status = CVT$_NORMAL; / Read in each number from the file, convert it, and write it to the output file. ** ================================================================= */ while ((fread (&IEEE_Double_number[0], sizeof(IEEE_Double_number), 1, in_file) == 1) && (ret_status == CVT$_NORMAL)) { ret_status = CVT$CONVERT_FLOAT(&IEEE_Double_number[0], CVT$K_IEEE_T, &D_Float_number, CVT$K_VAX_D, options); if (ret_status == CVT$NORMAL) { fwrite(&D_Float_number, sizeof(D_Float_number), 1, out_file); printf("Converted data: %lf.\n", D_Float_number); } } fclose(in_file); fclose(out_file); if (ret_status == CVT$_NORMAL) exit(1); else exit(ret_status); }

/* 
** =================================================================== 
** 
**  Example of CVT$CONVERT_FLOAT 
** 
** ------------------------------------------------------------------- 
** 
**  This example program reads IEEE T floating-point numbers from an 
**  input file, converts them to VAX D floating-point numbers and 
**  writes the result to an output file. 
** 
**  The input and output file names can be specified as the first and 
**  second arguments on the command line as follows: 
** 
**     $ EXAMPLE IEEE_T_INPUT_FILE.DAT VAX_D_OUTPUT_FILE.DAT 
** 
**  If the input or output files are not included on the command 
**  line then the program prompts the user for them. 
** 
** =================================================================== 
*/ 
#include <stdio.h> 
 
unsigned long CVT$CONVERT_FLOAT(void    *input_value, 
                                unsigned long input_type, 
                                void    *output_value, 
                                unsigned long output_type, 
                                unsigned long options); 
 
globalvalue CVT$K_VAX_D; 
globalvalue CVT$K_IEEE_T; 
globalvalue CVT$M_ROUND_TO_NEAREST; 
globalvalue CVT$_NORMAL; 
 
main(int argc, char *argv[]) 
 
{ 
 
  double        D_Float_number; 
  unsigned long IEEE_Double_number[2]; 
  unsigned long options; 
  char          in_filename[80]; 
  char          out_filename[80]; 
  FILE          *in_file, *out_file; 
  unsigned long ret_status; 
 
/* 
** Find out where we are going to get the data from.  
** First look at the first argument of the command line.  
** If nothing is there, then attempt to use IEEE_T_IN.DAT. 
** ================================================================= 
*/ 
if (argc == 1) 
{ 
  printf("Enter input data file: [IEEE_T_IN.DAT]: "); 
  if (gets(in_filename) == NULL) 
    exit(1); 
 
  if (strlen(in_filename) == 0)  
    strcpy(in_filename, "IEEE_T_IN.DAT"); 
}    
else 
  strcpy(in_filename, argv[1]); 
 
/* 
** Find out where we are going to put the output data. 
** First look at the second argument of the command line.  
** If nothing is there, then put it in VAX_D_OUT.DAT 
** ================================================================= 
*/ 
if (argc <= 2) 
{ 
  printf("Enter output data file: [VAX_D_OUT.DAT]: "); 
  if (gets(out_filename) == NULL) 
    exit(1); 
 
  if (strlen(out_filename) == 0)  
    strcpy(out_filename, "VAX_D_OUT.DAT"); 
}    
else 
  strcpy(out_filename, argv[2]); 
 
/* 
** Open the input and output files. 
** ----------------------------------------------------------------- 
*/ 
if ((in_file = fopen(in_filename, "r")) == NULL) 
{ 
  fprintf(stderr, "%s couldn't open file %s\n", argv[0], in_filename); 
  exit(1); 
} 
 
out_file = fopen(out_filename, "wb"); 
 
options     = CVT$M_ROUND_TO_NEAREST; 
ret_status  = CVT$_NORMAL; 
 
/* 
** Read in each number from the file, convert it, and write it to 
** the output file. 
** ================================================================= 
*/ 
while ((fread (&IEEE_Double_number[0], 
               sizeof(IEEE_Double_number), 
               1, 
               in_file) == 1) && 
       (ret_status == CVT$_NORMAL)) 
{ 
  ret_status = CVT$CONVERT_FLOAT(&IEEE_Double_number[0], CVT$K_IEEE_T, 
                                 &D_Float_number, CVT$K_VAX_D, 
                                 options); 
 
  if (ret_status == CVT$NORMAL) 
  { 
    fwrite(&D_Float_number, sizeof(D_Float_number), 1, out_file); 
    printf("Converted data: %lf.\n", D_Float_number); 
  } 
} 
fclose(in_file); 
fclose(out_file); 
 
if (ret_status == CVT$_NORMAL) 
  exit(1); 
else 
  exit(ret_status); 
}

CVT$FTOF

The Convert Floating-Point Data Type routine converts floating-point data types to other supported floating-point data types and allows additional control over the converted results. CVT$FTOF functionality is also available on other platforms supported by Compaq.

Format

status = CVT$FTOF input_value, input_type_code, output_value, output_type_code, options

RETURNS

OpenVMS usage: mask_longword

type: longword (unsigned)

access: write only

mechanism: by value

The status return value is an unsigned longword bit mask containing the condition codes raised by the function. CVT$FTOF returns CVT$K_NORMAL; otherwise, it sets one or more recoverable and unrecoverable conditions. Use the following condition names to determine which conditions are set:

Condition Name Condition (always reported by default)

CVT$K_NORMAL Normal successful completion.

CVT$M_INVALID_INPUT_TYPE Invalid input type code.

CVT$M_INVALID_OUTPUT_TYPE Invalid output type code.

CVT$M_INVALID_OPTION Invalid option argument.

Condition Name Condition (reported only if the CVT$M_REPORT_ALL option is selected)

CVT$M_RESULT_INFINITE Conversion produced an infinite result. ¹

CVT$M_RESULT_DENORMALIZED Conversion produced a denormalized result. ¹

CVT$M_RESULT_OVERFLOW_RANGE Conversion yielded an exponent greater than 60000 (8). ²

CVT$M_RESULT_UNDERFLOW_RANGE Conversion yielded an exponent less than 20000 (8). ²

CVT$M_RESULT_UNNORMALIZED Conversion produced an unnormalized result. ³

CVT$M_RESULT_INVALID Conversion result is either ROP (reserved operand), NaN (not a number), or closest equivalent. CRAY and IBM data types return 0. ⁴

CVT$M_RESULT_OVERFLOW Conversion resulted in overflow. ⁴

CVT$M_RESULT_UNDERFLOW Conversion resulted in underflow. ⁴

CVT$M_RESULT_INEXACT Conversion resulted in a loss of precision. ⁴

Condition Name	Condition (always reported by default)
CVT$K_NORMAL	Normal successful completion.
CVT$M_INVALID_INPUT_TYPE	Invalid input type code.
CVT$M_INVALID_OUTPUT_TYPE	Invalid output type code.
CVT$M_INVALID_OPTION	Invalid option argument.

Condition Name	Condition (reported only if the CVT$M_REPORT_ALL option is selected)
CVT$M_RESULT_INFINITE	Conversion produced an infinite result. ¹
CVT$M_RESULT_DENORMALIZED	Conversion produced a denormalized result. ¹
CVT$M_RESULT_OVERFLOW_RANGE	Conversion yielded an exponent greater than 60000 (8). ²
CVT$M_RESULT_UNDERFLOW_RANGE	Conversion yielded an exponent less than 20000 (8). ²
CVT$M_RESULT_UNNORMALIZED	Conversion produced an unnormalized result. ³
CVT$M_RESULT_INVALID	Conversion result is either ROP (reserved operand), NaN (not a number), or closest equivalent. CRAY and IBM data types return 0. ⁴
CVT$M_RESULT_OVERFLOW	Conversion resulted in overflow. ⁴
CVT$M_RESULT_UNDERFLOW	Conversion resulted in underflow. ⁴
CVT$M_RESULT_INEXACT	Conversion resulted in a loss of precision. ⁴

¹For IEEE data type conversions.
²For CRAY data type conversions.
³For IBM data type conversions.
⁴For all data type conversions.

Return status values are in the $CVTDEF module in the system symbol libraries.

Arguments

input_value

OpenVMS usage: varying_arg

type: unspecified

access: read only

mechanism: by reference

The address of a data area containing a floating-point number to be converted. The number can be floating-point data in one of the following formats:

F_Floating Big_Endian_IEEE_S_Floating

D_Floating Big_Endian_IEEE_T_Floating

G_Floating Big_Endian_IEEE_X_Floating

H_Floating IBM_Long_Floating

IEEE_S_Floating IBM_Short_Floating

IEEE_T_Floating CRAY_Floating_Single

IEEE_X_Floating

The value of the input_type_code argument determines the format and size of the input_value argument.
input_type_code

OpenVMS usage: longword_unsigned

type: longword (unsigned)

access: read only

mechanism: by value

The value of a longword bit mask specifying the type of floating-point data being passed in the input_value argument. Valid type codes are:

Input_type_code Format Size in Bytes

CVT$K_VAX_F F_Floating 4

CVT$K_VAX_D D_Floating 8

CVT$K_VAX_G G_Floating 8

CVT$K_VAX_H H_Floating 16

CVT$K_IEEE_S IEEE_S_Floating 4

CVT$K_IEEE_T IEEE_T_Floating 8

CVT$K_IEEE_X IEEE_X_Floating 16

CVT$K_BIG_ENDIAN_IEEE_S Big_Endian_IEEE_S_Floating 4

CVT$K_BIG_ENDIAN_IEEE_T Big_Endian_IEEE_T_Floating 8

CVT$K_BIG_ENDIAN_IEEE_X Big_Endian_IEEE_X_Floating 16

CVT$K_IBM_LONG IBM_Long_Floating 8

CVT$K_IBM_SHORT IBM_Short_Floating 4

CVT$K_CRAY_SINGLE CRAY_Floating 8

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OpenVMS usage:	cond_value
type:	longword (unsigned)
access:	write only
mechanism:	by value

OpenVMS usage:	floating_point
type:	F_floating
access:	read only
mechanism:	by reference

OpenVMS usage:	mask_longword
type:	longword (unsigned)
access:	read only
mechanism:	by reference

OpenVMS usage:	longword-unsigned
type:	longword (unsigned)
access:	read only
mechanism:	by reference

SS$_NORMAL	Routine successfully completed.
LIB$_INVARG	Invalid argument. The value of seconds was less than 0 or greater than 100,000.0
LIB$_WRONUMARG	Wrong number of arguments. An incorrect number of arguments was passed to LIB$WAIT.

OpenVMS usage:	varying_arg
type:	unspecified
access:	read only
mechanism:	by reference

OpenVMS usage:	longword_unsigned
type:	longword (unsigned)
access:	read only
mechanism:	by value

CVT$_NORMAL	Normal successful completion.
CVT$_INPCONERR	Input conversion error.
CVT$_INVINPTYP	Invalid input type code.
CVT$_INVOPT	Invalid option argument.
CVT$_INVOUTTYP	Invalid output type code.
CVT$_INVVAL	Input value was an invalid number or NaN.
CVT$_NEGINF	Input value was negative infinity.
CVT$_OUTCONERR	Output conversion error.
CVT$_OVERFLOW	Overflow detected during conversion.
CVT$_POSINF	Input value was positive infinity.
CVT$_UNDERFLOW	Underflow detected during conversion.

F_Floating	Big_Endian_IEEE_S_Floating
D_Floating	Big_Endian_IEEE_T_Floating
G_Floating	Big_Endian_IEEE_X_Floating
H_Floating	IBM_Long_Floating
IEEE_S_Floating	IBM_Short_Floating
IEEE_T_Floating	CRAY_Floating_Single
IEEE_X_Floating

OpenVMS RTL Library (LIB$) Manual

LIB$WAIT

Format

LIB$WAIT seconds [,flags] [,float-type]

RETURNS

Arguments

seconds

flags

float-type

Description

Condition Values Returned

Example

Part 3CVT$ Reference Section

CVT$CONVERT_FLOAT

Format

CVT$CONVERT_FLOAT input_value, input_type_code, output_value, output_type_code, options

RETURNS

Arguments

input_value

input_type_code

output_value

output_type_code

options

Description

Condition Values Returned

Example

CVT$FTOF

Format

status = CVT$FTOF input_value, input_type_code, output_value, output_type_code, options

RETURNS

Arguments

input_value

input_type_code

Part 3
CVT$ Reference Section