FREADC

Reads a logical record in physical sequence from a KSAM file to the target.

Syntax

   I16          I16V   LAI  16V

   lgth:=FREADC(filenum,buffer,length);

Functional Return

lgth

16-bit signed integer by value (assigned functional return)

Returns the length of the information transferred.

If lgth is positive, it is a halfword count.
If lgth is negative, it is a byte count.
If lgth is 0, the position is identified, but the data is not returned.

Parameters

filenum

16-bit signed integer by value (required)

Passes the file number of the file to be read in physical record sequence.

buffer

logical array (required)

Returns the transferred record. It must be large enough to hold all the information to be read.

length

16-bit signed integer by value (required)

Passes the number of halfwords or bytes to be transferred. If length is positive, it is the length in halfwords; if negative, it is the length in bytes. If, zero, no transfer occurs. If length is less than the size of the record to be transferred, only the first length halfwords or bytes are transferred from the record. If the length is larger than the physical record size, only the physical record length is transferred.

Operation Notes

This intrinsic reads the advance flag and advances to the next record if the flag is set to TRUE. It positions only the physical record pointer to the appropriate record. Deleted records are skipped. When its function is completed, it sets the advance flag to TRUE.

Condition Codes

CCE: Request granted.
CCG: Request denied. The logical end-of-data was encountered during the read.
CCL: Request denied. An error occurred.

Refer to this intrinsic in the MPE/iX Intrinsics Reference Manual (32650-90028) for other codes pertaining to KSAM files.

FREADC

Technical documentation

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Syntax

Functional Return

Parameters

Operation Notes

Condition Codes