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Standard SAP Help for SET_BIT
SET BIT
Short Reference • SET BIT ABAP Statement • OF SET BIT • TO SET BIT
ABAP_BASIC_FORM_18 SET BIT bitpos OF byte_string [TO val].
What does it do? This statement sets the bit in bit position bitpos of the variable byte_string to 1 or, if specified, to the value of data object val. The other bits in byte_string remain unchanged.
The data object byte_string must be byte-like, whereas bitpos and val are numerical expression positions of operand type i. The value of bitpos must be greater than 0 and val must be either 0 or 1. Otherwise an exception that cannot be handled is raised. The bit positions in byte_string are counted from the beginning of the data object. If the value of bitpos is greater than the number of bits in byte_string, no bit is replaced and sy-subrc is set to 4.
System Fieldssy-subrcMeaning 0A bit in data object byte_string was set at position bitpos. 4The value of bitpos is greater than the number of bits in byte_string, therefore no bit was set.
Latest notes:If byte_string has the deep type xstring, a bit is set in the referenced byte string, not in the reference. Character-like data objects are also allowed for byte_string in non-Unicode programs. Setting single bits is especially suited to preparing operators in bit expressions. The predefined function bit-set can also be used to set an individual bit.
Example ABAP Coding In the data object hex with eight bits, the bit is set to the value 1 at the position determined by the loop counter sy-index, with all other bits set to 0. The output is '80 40 20 10 08 04 02 01'. DATA hex TYPE x LENGTH 1. DATA output TYPE string. DO 8 TIMES. CLEAR hex. SET BIT sy-index OF hex. output = output <(> <)><(> <)> |{ hex } |. ENDDO. cl_demo_output=>display( output ).
