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1x 1x 1x 1x 1x 3x 3x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 1x 1x 1x 4x 4x 4x 4x 4x 4x 4x 4x 4x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 4x 4x 4x 4x 4x 4x 4x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 11x 11x 18x 18x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 11x 11x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 11x 11x 11x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | CLASS zcl_abapgit_git_pack DEFINITION
PUBLIC
CREATE PUBLIC .
PUBLIC SECTION.
TYPES:
BEGIN OF ty_node,
chmod TYPE zif_abapgit_git_definitions=>ty_chmod,
name TYPE string,
sha1 TYPE zif_abapgit_git_definitions=>ty_sha1,
END OF ty_node .
TYPES:
ty_nodes_tt TYPE STANDARD TABLE OF ty_node WITH DEFAULT KEY .
TYPES:
BEGIN OF ty_commit,
tree TYPE zif_abapgit_git_definitions=>ty_sha1,
parent TYPE zif_abapgit_git_definitions=>ty_sha1,
parent2 TYPE zif_abapgit_git_definitions=>ty_sha1,
author TYPE string,
committer TYPE string,
gpgsig TYPE string,
body TYPE string,
END OF ty_commit .
TYPES:
BEGIN OF ty_tag,
object TYPE string,
type TYPE string,
tag TYPE string,
tagger_name TYPE string,
tagger_email TYPE string,
message TYPE string,
body TYPE string,
END OF ty_tag .
CLASS-METHODS decode
IMPORTING
!iv_data TYPE xstring
RETURNING
VALUE(rt_objects) TYPE zif_abapgit_definitions=>ty_objects_tt
RAISING
zcx_abapgit_exception .
CLASS-METHODS decode_tree
IMPORTING
!iv_data TYPE xstring
RETURNING
VALUE(rt_nodes) TYPE ty_nodes_tt
RAISING
zcx_abapgit_exception .
CLASS-METHODS decode_commit
IMPORTING
!iv_data TYPE xstring
RETURNING
VALUE(rs_commit) TYPE ty_commit
RAISING
zcx_abapgit_exception .
CLASS-METHODS decode_tag
IMPORTING
!iv_data TYPE xstring
RETURNING
VALUE(rs_tag) TYPE ty_tag
RAISING
zcx_abapgit_exception .
CLASS-METHODS encode
IMPORTING
!it_objects TYPE zif_abapgit_definitions=>ty_objects_tt
RETURNING
VALUE(rv_data) TYPE xstring
RAISING
zcx_abapgit_exception .
CLASS-METHODS encode_tree
IMPORTING
!it_nodes TYPE ty_nodes_tt
RETURNING
VALUE(rv_data) TYPE xstring
RAISING
zcx_abapgit_exception .
CLASS-METHODS encode_commit
IMPORTING
!is_commit TYPE ty_commit
RETURNING
VALUE(rv_data) TYPE xstring
RAISING
zcx_abapgit_exception .
CLASS-METHODS encode_tag
IMPORTING
!is_tag TYPE ty_tag
RETURNING
VALUE(rv_data) TYPE xstring
RAISING
zcx_abapgit_exception .
PROTECTED SECTION.
PRIVATE SECTION.
CONSTANTS:
c_pack_start TYPE x LENGTH 4 VALUE '5041434B' ##NO_TEXT.
CONSTANTS:
c_zlib TYPE x LENGTH 2 VALUE '789C' ##NO_TEXT.
CONSTANTS:
c_zlib_hmm TYPE x LENGTH 2 VALUE '7801' ##NO_TEXT.
CONSTANTS: " PACK
c_version TYPE x LENGTH 4 VALUE '00000002' ##NO_TEXT.
CLASS-METHODS decode_deltas
CHANGING
!ct_objects TYPE zif_abapgit_definitions=>ty_objects_tt
RAISING
zcx_abapgit_exception .
CLASS-METHODS delta
IMPORTING
!is_object TYPE zif_abapgit_definitions=>ty_object
CHANGING
!ct_objects TYPE zif_abapgit_definitions=>ty_objects_tt
RAISING
zcx_abapgit_exception .
CLASS-METHODS delta_header
IMPORTING
!io_stream TYPE REF TO lcl_stream
RETURNING
VALUE(rv_header) TYPE i .
CLASS-METHODS sort_tree
IMPORTING
!it_nodes TYPE ty_nodes_tt
RETURNING
VALUE(rt_nodes) TYPE ty_nodes_tt .
CLASS-METHODS get_type
IMPORTING
!iv_x TYPE x
RETURNING
VALUE(rv_type) TYPE zif_abapgit_git_definitions=>ty_type
RAISING
zcx_abapgit_exception .
CLASS-METHODS get_length
EXPORTING
!ev_length TYPE i
CHANGING
!cv_data TYPE xstring .
CLASS-METHODS type_and_length
IMPORTING
!iv_type TYPE zif_abapgit_git_definitions=>ty_type
!iv_length TYPE i
RETURNING
VALUE(rv_xstring) TYPE xstring
RAISING
zcx_abapgit_exception .
CLASS-METHODS zlib_decompress
CHANGING
!cv_data TYPE xstring
!cv_decompressed TYPE xstring
RAISING
zcx_abapgit_exception .
ENDCLASS.
CLASS zcl_abapgit_git_pack IMPLEMENTATION.
METHOD decode.
DATA: lv_x TYPE x,
lv_data TYPE xstring,
lv_type TYPE c LENGTH 6,
lv_zlib TYPE x LENGTH 2,
lv_objects TYPE i,
lv_len TYPE i,
lv_sha1 TYPE zif_abapgit_git_definitions=>ty_sha1,
lv_ref_delta TYPE zif_abapgit_git_definitions=>ty_sha1,
lv_compressed_len TYPE i,
lv_compressed TYPE xstring,
lv_decompressed TYPE xstring,
lv_decompress_len TYPE i,
lv_xstring TYPE xstring,
lv_expected TYPE i,
ls_object LIKE LINE OF rt_objects,
lv_uindex TYPE sy-index.
lv_data = iv_data.
* header
IF NOT xstrlen( lv_data ) > 4 OR lv_data(4) <> c_pack_start.
zcx_abapgit_exception=>raise( |Unexpected pack header| ).
ENDIF.
lv_data = lv_data+4.
* version
IF lv_data(4) <> c_version.
zcx_abapgit_exception=>raise( |Version not supported| ).
ENDIF.
lv_data = lv_data+4.
* number of objects
lv_xstring = lv_data(4).
lv_objects = zcl_abapgit_convert=>xstring_to_int( lv_xstring ).
lv_data = lv_data+4.
DO lv_objects TIMES.
lv_uindex = sy-index.
lv_x = lv_data(1).
lv_type = get_type( lv_x ).
get_length( IMPORTING ev_length = lv_expected
CHANGING cv_data = lv_data ).
IF lv_type = zif_abapgit_git_definitions=>c_type-ref_d.
lv_ref_delta = lv_data(20).
lv_data = lv_data+20.
ENDIF.
* strip header, '789C', CMF + FLG
lv_zlib = lv_data(2).
IF lv_zlib <> c_zlib AND lv_zlib <> c_zlib_hmm.
zcx_abapgit_exception=>raise( |Unexpected zlib header| ).
ENDIF.
lv_data = lv_data+2.
*******************************
IF lv_zlib = c_zlib.
cl_abap_gzip=>decompress_binary(
EXPORTING
gzip_in = lv_data
IMPORTING
raw_out = lv_decompressed
raw_out_len = lv_decompress_len ).
IF lv_expected <> lv_decompress_len.
zcx_abapgit_exception=>raise( |Decompression failed| ).
ENDIF.
cl_abap_gzip=>compress_binary(
EXPORTING
raw_in = lv_decompressed
IMPORTING
gzip_out = lv_compressed
gzip_out_len = lv_compressed_len ).
IF xstrlen( lv_data ) <= lv_compressed_len OR
lv_compressed(lv_compressed_len) <> lv_data(lv_compressed_len).
"Lets try with zlib before error in out for good
"This fixes issues with TFS 2017 and visualstudio.com Git repos
zlib_decompress( CHANGING cv_data = lv_data
cv_decompressed = lv_decompressed ).
ELSE.
lv_data = lv_data+lv_compressed_len.
ENDIF.
ELSEIF lv_zlib = c_zlib_hmm.
* cl_abap_gzip compression works for header '789C', but does not work for
* '7801', call custom implementation of DEFLATE algorithm.
* The custom implementation could handle both, but most likely the kernel
* implementation runs faster than the custom ABAP.
zlib_decompress( CHANGING cv_data = lv_data
cv_decompressed = lv_decompressed ).
ENDIF.
CLEAR ls_object.
ls_object-adler32 = lv_data(4).
lv_data = lv_data+4. " skip adler checksum
IF lv_type = zif_abapgit_git_definitions=>c_type-ref_d.
ls_object-sha1 = lv_ref_delta.
TRANSLATE ls_object-sha1 TO LOWER CASE.
ELSE.
ls_object-sha1 = zcl_abapgit_hash=>sha1(
iv_type = lv_type
iv_data = lv_decompressed ).
ENDIF.
ls_object-type = lv_type.
ls_object-data = lv_decompressed.
ls_object-index = lv_uindex.
APPEND ls_object TO rt_objects.
ENDDO.
* check SHA1 at end of pack
lv_len = xstrlen( iv_data ) - 20.
lv_xstring = iv_data(lv_len).
lv_sha1 = zcl_abapgit_hash=>sha1_raw( lv_xstring ).
IF to_upper( lv_sha1 ) <> lv_data.
zcx_abapgit_exception=>raise( |SHA1 at end of pack doesn't match| ).
ENDIF.
decode_deltas( CHANGING ct_objects = rt_objects ).
ENDMETHOD.
METHOD decode_commit.
DATA: lv_string TYPE string,
lv_word TYPE string,
lv_offset TYPE i,
lv_length TYPE i,
lv_length_gpgsig TYPE i,
lv_trash TYPE string ##NEEDED,
lt_string TYPE TABLE OF string.
FIELD-SYMBOLS: <lv_string> LIKE LINE OF lt_string.
lv_string = zcl_abapgit_convert=>xstring_to_string_utf8( iv_data ).
SPLIT lv_string AT cl_abap_char_utilities=>newline INTO TABLE lt_string.
LOOP AT lt_string ASSIGNING <lv_string>.
lv_length = strlen( <lv_string> ) + 1.
lv_string = lv_string+lv_length.
SPLIT <lv_string> AT space INTO lv_word lv_trash.
CASE lv_word.
WHEN 'tree'.
rs_commit-tree = <lv_string>+5.
WHEN 'parent'.
IF rs_commit-parent IS INITIAL.
rs_commit-parent = <lv_string>+7.
ELSE.
rs_commit-parent2 = <lv_string>+7.
ENDIF.
WHEN 'author'.
rs_commit-author = <lv_string>+7.
WHEN 'committer'.
rs_commit-committer = <lv_string>+10.
EXIT. " current loop
WHEN OTHERS.
ASSERT 1 = 0.
ENDCASE.
ENDLOOP.
lv_length = strlen( lv_string ).
IF lv_length >= 6 AND lv_string+0(6) = 'gpgsig'.
FIND REGEX |-----END PGP SIGNATURE-----[[:space:]]+|
IN lv_string
MATCH OFFSET lv_offset
MATCH LENGTH lv_length.
lv_length = lv_length - 1.
lv_length_gpgsig = lv_offset + lv_length - 7.
lv_length = lv_offset + lv_length.
rs_commit-gpgsig = lv_string+7(lv_length_gpgsig).
lv_string = lv_string+lv_length.
ENDIF.
rs_commit-body = lv_string+1.
IF rs_commit-author IS INITIAL
OR rs_commit-committer IS INITIAL
OR rs_commit-tree IS INITIAL.
zcx_abapgit_exception=>raise( |multiple parents? not supported| ).
ENDIF.
ENDMETHOD.
METHOD decode_deltas.
DATA: ls_object LIKE LINE OF ct_objects,
li_progress TYPE REF TO zif_abapgit_progress,
lt_deltas LIKE ct_objects.
LOOP AT ct_objects INTO ls_object
USING KEY type
WHERE type = zif_abapgit_git_definitions=>c_type-ref_d.
INSERT ls_object INTO TABLE lt_deltas.
ENDLOOP.
DELETE ct_objects
USING KEY type
WHERE type = zif_abapgit_git_definitions=>c_type-ref_d.
"Restore correct Delta Order
SORT lt_deltas BY index.
li_progress = zcl_abapgit_progress=>get_instance( lines( lt_deltas ) ).
LOOP AT lt_deltas INTO ls_object.
li_progress->show( iv_current = sy-tabix
iv_text = 'Decode deltas' ).
delta( EXPORTING is_object = ls_object
CHANGING ct_objects = ct_objects ).
ENDLOOP.
ENDMETHOD.
METHOD decode_tag.
DATA: lv_string TYPE string,
lv_word TYPE string,
lv_trash TYPE string ##NEEDED,
lt_string TYPE TABLE OF string.
FIELD-SYMBOLS: <lv_string> LIKE LINE OF lt_string.
lv_string = zcl_abapgit_convert=>xstring_to_string_utf8( iv_data ).
SPLIT lv_string AT cl_abap_char_utilities=>newline INTO TABLE lt_string.
LOOP AT lt_string ASSIGNING <lv_string>.
SPLIT <lv_string> AT space INTO lv_word lv_trash.
CASE lv_word.
WHEN 'object'.
rs_tag-object = lv_trash.
WHEN 'type'.
rs_tag-type = lv_trash.
WHEN 'tag'.
rs_tag-tag = lv_trash.
WHEN 'tagger'.
FIND FIRST OCCURRENCE OF REGEX `(.*)<(.*)>`
IN lv_trash
SUBMATCHES rs_tag-tagger_name
rs_tag-tagger_email.
rs_tag-tagger_name = condense( rs_tag-tagger_name ).
WHEN ''.
" ignore blank lines
CONTINUE.
WHEN OTHERS.
" these are the non empty line which don't start with a key word
" the first one is the message, the rest are cumulated to the body
IF rs_tag-message IS INITIAL.
rs_tag-message = <lv_string>.
ELSE.
IF rs_tag-body IS NOT INITIAL.
rs_tag-body = rs_tag-body && cl_abap_char_utilities=>newline.
ENDIF.
rs_tag-body = rs_tag-body && <lv_string>.
ENDIF.
ENDCASE.
ENDLOOP.
ENDMETHOD.
METHOD decode_tree.
CONSTANTS: lc_sha_length TYPE i VALUE 20,
lc_null TYPE x VALUE '00'.
DATA: lv_xstring TYPE xstring,
lv_chmod TYPE zif_abapgit_git_definitions=>ty_chmod,
lv_name TYPE string,
lv_string TYPE string,
lv_len TYPE i,
lv_offset TYPE i,
lv_cursor TYPE i,
lv_match TYPE i,
ls_node TYPE ty_node.
DO.
FIND FIRST OCCURRENCE OF lc_null IN SECTION OFFSET lv_cursor OF iv_data
IN BYTE MODE MATCH OFFSET lv_match.
IF sy-subrc <> 0.
EXIT.
ENDIF.
lv_len = lv_match - lv_cursor.
lv_xstring = iv_data+lv_cursor(lv_len).
lv_string = zcl_abapgit_convert=>xstring_to_string_utf8( lv_xstring ).
SPLIT lv_string AT space INTO lv_chmod lv_name.
CLEAR ls_node.
ls_node-chmod = lv_chmod.
IF ls_node-chmod <> zif_abapgit_git_definitions=>c_chmod-dir
AND ls_node-chmod <> zif_abapgit_git_definitions=>c_chmod-file
AND ls_node-chmod <> zif_abapgit_git_definitions=>c_chmod-symbolic_link
AND ls_node-chmod <> zif_abapgit_git_definitions=>c_chmod-executable
AND ls_node-chmod <> zif_abapgit_git_definitions=>c_chmod-submodule.
zcx_abapgit_exception=>raise( |Unknown chmod { ls_node-chmod }| ).
ENDIF.
lv_offset = lv_match + 1.
ls_node-name = lv_name.
ls_node-sha1 = iv_data+lv_offset(lc_sha_length).
TRANSLATE ls_node-sha1 TO LOWER CASE.
APPEND ls_node TO rt_nodes.
lv_cursor = lv_match + 1 + lc_sha_length.
ENDDO.
ENDMETHOD.
METHOD delta.
CONSTANTS: lc_1 TYPE x VALUE '01',
lc_2 TYPE x VALUE '02',
lc_4 TYPE x VALUE '04',
lc_8 TYPE x VALUE '08',
lc_16 TYPE x VALUE '10',
lc_32 TYPE x VALUE '20',
lc_64 TYPE x VALUE '40',
lc_128 TYPE x VALUE '80'.
DATA: lv_base TYPE xstring,
lv_result TYPE xstring,
lv_offset TYPE i,
lo_stream TYPE REF TO lcl_stream,
lv_sha1 TYPE zif_abapgit_git_definitions=>ty_sha1,
ls_object LIKE LINE OF ct_objects,
lv_len TYPE i,
lv_tmp TYPE xstring,
lv_org TYPE x.
FIELD-SYMBOLS: <ls_object> LIKE LINE OF ct_objects.
CREATE OBJECT lo_stream
EXPORTING
iv_data = is_object-data.
* find base
READ TABLE ct_objects ASSIGNING <ls_object>
WITH KEY sha COMPONENTS sha1 = is_object-sha1.
IF sy-subrc <> 0.
zcx_abapgit_exception=>raise( |Base not found, { is_object-sha1 }| ).
ELSEIF <ls_object>-type = zif_abapgit_git_definitions=>c_type-ref_d.
* sanity check
zcx_abapgit_exception=>raise( |Delta, base eq delta| ).
ENDIF.
lv_base = <ls_object>-data.
* skip the 2 headers
delta_header( lo_stream ).
delta_header( lo_stream ).
WHILE xstrlen( lo_stream->get( ) ) > 0.
lv_org = lo_stream->eat_byte( ).
IF lv_org BIT-AND lc_128 = lc_128. " MSB = 1
lv_offset = 0.
IF lv_org BIT-AND lc_1 = lc_1.
lv_offset = lo_stream->eat_byte( ).
ENDIF.
IF lv_org BIT-AND lc_2 = lc_2.
lv_offset = lv_offset + lo_stream->eat_byte( ) * 256.
ENDIF.
IF lv_org BIT-AND lc_4 = lc_4.
lv_offset = lv_offset + lo_stream->eat_byte( ) * 65536.
ENDIF.
IF lv_org BIT-AND lc_8 = lc_8.
lv_offset = lv_offset + lo_stream->eat_byte( ) * 16777216. " hmm, overflow?
ENDIF.
lv_len = 0.
IF lv_org BIT-AND lc_16 = lc_16.
lv_len = lo_stream->eat_byte( ).
ENDIF.
IF lv_org BIT-AND lc_32 = lc_32.
lv_len = lv_len + lo_stream->eat_byte( ) * 256.
ENDIF.
IF lv_org BIT-AND lc_64 = lc_64.
lv_len = lv_len + lo_stream->eat_byte( ) * 65536.
ENDIF.
IF lv_len = 0.
lv_len = 65536.
ENDIF.
CONCATENATE lv_result lv_base+lv_offset(lv_len)
INTO lv_result IN BYTE MODE.
ELSE. " lv_bitbyte(1) = '0'
* insert from delta
lv_len = lv_org. " convert to int
lv_tmp = lo_stream->eat_bytes( lv_len ).
CONCATENATE lv_result lv_tmp INTO lv_result IN BYTE MODE.
ENDIF.
ENDWHILE.
lv_sha1 = zcl_abapgit_hash=>sha1( iv_type = <ls_object>-type
iv_data = lv_result ).
CLEAR ls_object.
ls_object-sha1 = lv_sha1.
ls_object-type = <ls_object>-type.
ls_object-data = lv_result.
ls_object-index = <ls_object>-index. "Retain sort index
APPEND ls_object TO ct_objects.
ENDMETHOD.
METHOD delta_header.
DATA: lv_bitbyte TYPE zif_abapgit_git_definitions=>ty_bitbyte,
lv_bits TYPE string,
lv_x TYPE x.
lv_bits = ''.
DO.
lv_x = io_stream->eat_byte( ).
lv_bitbyte = zcl_abapgit_convert=>x_to_bitbyte( lv_x ).
CONCATENATE lv_bitbyte+1 lv_bits INTO lv_bits.
IF lv_bitbyte(1) = '0'.
EXIT. " current loop
ENDIF.
ENDDO.
rv_header = zcl_abapgit_convert=>bitbyte_to_int( lv_bits ).
ENDMETHOD.
METHOD encode.
DATA: lv_sha1 TYPE x LENGTH 20,
lv_adler32 TYPE zif_abapgit_git_definitions=>ty_adler32,
lv_compressed TYPE xstring,
lv_xstring TYPE xstring,
li_progress TYPE REF TO zif_abapgit_progress,
lv_objects_total TYPE i.
FIELD-SYMBOLS: <ls_object> LIKE LINE OF it_objects.
rv_data = c_pack_start.
CONCATENATE rv_data c_version INTO rv_data IN BYTE MODE.
lv_xstring = zcl_abapgit_convert=>int_to_xstring4( lines( it_objects ) ).
CONCATENATE rv_data lv_xstring INTO rv_data IN BYTE MODE.
lv_objects_total = lines( it_objects ).
li_progress = zcl_abapgit_progress=>get_instance( lv_objects_total ).
LOOP AT it_objects ASSIGNING <ls_object>.
li_progress->show(
iv_current = sy-tabix
iv_text = |Encoding objects ( { sy-tabix } of { lv_objects_total } )| ).
lv_xstring = type_and_length(
iv_type = <ls_object>-type
iv_length = xstrlen( <ls_object>-data ) ).
CONCATENATE rv_data lv_xstring INTO rv_data IN BYTE MODE.
cl_abap_gzip=>compress_binary(
EXPORTING
raw_in = <ls_object>-data
IMPORTING
gzip_out = lv_compressed ).
CONCATENATE rv_data c_zlib lv_compressed INTO rv_data IN BYTE MODE.
IF NOT <ls_object>-adler32 IS INITIAL.
lv_adler32 = <ls_object>-adler32.
ELSE.
lv_adler32 = zcl_abapgit_hash=>adler32( <ls_object>-data ).
ENDIF.
CONCATENATE rv_data lv_adler32 INTO rv_data IN BYTE MODE.
ENDLOOP.
lv_sha1 = to_upper( zcl_abapgit_hash=>sha1_raw( rv_data ) ).
CONCATENATE rv_data lv_sha1 INTO rv_data IN BYTE MODE.
ENDMETHOD.
METHOD encode_commit.
DATA: lv_string TYPE string,
lv_tmp TYPE string,
lv_tree_lower TYPE string,
lv_parent_lower TYPE string.
lv_tree_lower = is_commit-tree.
TRANSLATE lv_tree_lower TO LOWER CASE.
lv_string = ''.
CONCATENATE 'tree' lv_tree_lower INTO lv_tmp SEPARATED BY space.
CONCATENATE lv_string lv_tmp cl_abap_char_utilities=>newline INTO lv_string.
IF NOT is_commit-parent IS INITIAL.
lv_parent_lower = is_commit-parent.
TRANSLATE lv_parent_lower TO LOWER CASE.
CONCATENATE 'parent' lv_parent_lower
INTO lv_tmp SEPARATED BY space.
CONCATENATE lv_string lv_tmp cl_abap_char_utilities=>newline INTO lv_string.
ENDIF.
IF NOT is_commit-parent2 IS INITIAL.
lv_parent_lower = is_commit-parent2.
TRANSLATE lv_parent_lower TO LOWER CASE.
CONCATENATE 'parent' lv_parent_lower
INTO lv_tmp SEPARATED BY space.
CONCATENATE lv_string lv_tmp cl_abap_char_utilities=>newline INTO lv_string.
ENDIF.
CONCATENATE 'author' is_commit-author
INTO lv_tmp SEPARATED BY space.
CONCATENATE lv_string lv_tmp cl_abap_char_utilities=>newline INTO lv_string.
CONCATENATE 'committer' is_commit-committer
INTO lv_tmp SEPARATED BY space.
CONCATENATE lv_string lv_tmp cl_abap_char_utilities=>newline INTO lv_string.
IF NOT is_commit-gpgsig IS INITIAL.
CONCATENATE 'gpgsig' is_commit-gpgsig
INTO lv_tmp SEPARATED BY space.
CONCATENATE lv_string lv_tmp INTO lv_string.
ENDIF.
CONCATENATE lv_string cl_abap_char_utilities=>newline is_commit-body INTO lv_string.
rv_data = zcl_abapgit_convert=>string_to_xstring_utf8( lv_string ).
ENDMETHOD.
METHOD encode_tag.
DATA: lv_string TYPE string,
lv_time TYPE zcl_abapgit_git_time=>ty_unixtime.
lv_time = zcl_abapgit_git_time=>get_unix( ).
lv_string = |object { is_tag-object }{ cl_abap_char_utilities=>newline }|
&& |type { is_tag-type }{ cl_abap_char_utilities=>newline }|
&& |tag { zcl_abapgit_git_tag=>remove_tag_prefix( is_tag-tag ) }{ cl_abap_char_utilities=>newline }|
&& |tagger { is_tag-tagger_name } <{ is_tag-tagger_email }> { lv_time }|
&& |{ cl_abap_char_utilities=>newline }|
&& |{ cl_abap_char_utilities=>newline }|
&& |{ is_tag-message }|.
rv_data = zcl_abapgit_convert=>string_to_xstring_utf8( lv_string ).
ENDMETHOD.
METHOD encode_tree.
CONSTANTS: lc_null TYPE x VALUE '00'.
DATA: lv_string TYPE string,
lt_nodes LIKE it_nodes,
lv_hex20 TYPE x LENGTH 20,
lv_xstring TYPE xstring.
FIELD-SYMBOLS: <ls_node> LIKE LINE OF it_nodes.
lt_nodes = sort_tree( it_nodes ).
LOOP AT lt_nodes ASSIGNING <ls_node>.
ASSERT NOT <ls_node>-chmod IS INITIAL.
ASSERT NOT <ls_node>-name IS INITIAL.
ASSERT NOT <ls_node>-sha1 IS INITIAL.
CONCATENATE <ls_node>-chmod <ls_node>-name INTO lv_string SEPARATED BY space.
lv_xstring = zcl_abapgit_convert=>string_to_xstring_utf8( lv_string ).
lv_hex20 = to_upper( <ls_node>-sha1 ).
CONCATENATE rv_data lv_xstring lc_null lv_hex20 INTO rv_data IN BYTE MODE.
ENDLOOP.
ENDMETHOD.
METHOD get_length.
* https://github.com/git/git/blob/master/Documentation/technical/pack-format.txt
* n-byte sizeN (as long as MSB is set, each 7-bit)
* size0..sizeN form 4+7+7+..+7 bit integer, size0
* is the least significant part, and sizeN is the
* most significant part.
DATA: lv_x TYPE x,
lv_length_bits TYPE string,
lv_bitbyte TYPE zif_abapgit_git_definitions=>ty_bitbyte.
lv_x = cv_data(1).
lv_bitbyte = zcl_abapgit_convert=>x_to_bitbyte( lv_x ).
cv_data = cv_data+1.
lv_length_bits = lv_bitbyte+4.
WHILE lv_bitbyte(1) <> '0'.
lv_x = cv_data(1).
lv_bitbyte = zcl_abapgit_convert=>x_to_bitbyte( lv_x ).
cv_data = cv_data+1.
CONCATENATE lv_bitbyte+1 lv_length_bits INTO lv_length_bits.
ENDWHILE.
ev_length = zcl_abapgit_convert=>bitbyte_to_int( lv_length_bits ).
ENDMETHOD.
METHOD get_type.
CONSTANTS: lc_mask TYPE x VALUE 112.
DATA: lv_xtype TYPE x.
lv_xtype = iv_x BIT-AND lc_mask.
CASE lv_xtype.
WHEN 16.
rv_type = zif_abapgit_git_definitions=>c_type-commit.
WHEN 32.
rv_type = zif_abapgit_git_definitions=>c_type-tree.
WHEN 48.
rv_type = zif_abapgit_git_definitions=>c_type-blob.
WHEN 64.
rv_type = zif_abapgit_git_definitions=>c_type-tag.
WHEN 112.
rv_type = zif_abapgit_git_definitions=>c_type-ref_d.
WHEN OTHERS.
zcx_abapgit_exception=>raise( |Todo, unknown git pack type| ).
ENDCASE.
ENDMETHOD.
METHOD sort_tree.
TYPES: BEGIN OF ty_sort,
sort TYPE string,
node TYPE ty_node,
END OF ty_sort.
DATA: lt_sort TYPE STANDARD TABLE OF ty_sort WITH DEFAULT KEY.
FIELD-SYMBOLS: <ls_sort> LIKE LINE OF lt_sort,
<ls_node> LIKE LINE OF it_nodes.
LOOP AT it_nodes ASSIGNING <ls_node>.
APPEND INITIAL LINE TO lt_sort ASSIGNING <ls_sort>.
IF <ls_node>-chmod = zif_abapgit_git_definitions=>c_chmod-dir.
CONCATENATE <ls_node>-name '/' INTO <ls_sort>-sort.
ELSE.
<ls_sort>-sort = <ls_node>-name.
ENDIF.
<ls_sort>-node = <ls_node>.
ENDLOOP.
* following has to be done, or unpack will fail on server side
SORT lt_sort BY sort ASCENDING.
LOOP AT lt_sort ASSIGNING <ls_sort>.
APPEND <ls_sort>-node TO rt_nodes.
ENDLOOP.
ENDMETHOD.
METHOD type_and_length.
* see http://stefan.saasen.me/articles/git-clone-in-haskell-from-the-bottom-up/#pack_file_objects
DATA: lv_type TYPE i,
lv_length TYPE i,
lv_hex TYPE x LENGTH 1.
CASE iv_type.
WHEN zif_abapgit_git_definitions=>c_type-commit.
lv_type = 16.
WHEN zif_abapgit_git_definitions=>c_type-tree.
lv_type = 32.
WHEN zif_abapgit_git_definitions=>c_type-blob.
lv_type = 48.
WHEN zif_abapgit_git_definitions=>c_type-tag.
lv_type = 64.
WHEN zif_abapgit_git_definitions=>c_type-ref_d.
lv_type = 112.
WHEN OTHERS.
zcx_abapgit_exception=>raise( |Unexpected object type while encoding pack| ).
ENDCASE.
lv_length = iv_length.
* first byte
IF lv_length > 15.
lv_hex = 128.
ENDIF.
lv_hex = lv_hex + lv_type + lv_length MOD 16.
rv_xstring = lv_hex.
lv_length = lv_length DIV 16.
* subsequent bytes
WHILE lv_length >= 128.
lv_hex = 128 + lv_length MOD 128.
CONCATENATE rv_xstring lv_hex INTO rv_xstring IN BYTE MODE.
lv_length = lv_length DIV 128.
ENDWHILE.
* last byte
IF lv_length > 0.
lv_hex = lv_length.
CONCATENATE rv_xstring lv_hex INTO rv_xstring IN BYTE MODE.
ENDIF.
ENDMETHOD.
METHOD zlib_decompress.
DATA: ls_data TYPE zcl_abapgit_zlib=>ty_decompress,
lv_compressed_len TYPE i,
lv_adler32 TYPE zif_abapgit_git_definitions=>ty_adler32.
ls_data = zcl_abapgit_zlib=>decompress( cv_data ).
lv_compressed_len = ls_data-compressed_len.
cv_decompressed = ls_data-raw.
IF lv_compressed_len IS INITIAL.
zcx_abapgit_exception=>raise( |Decompression failed :o/| ).
ENDIF.
cv_data = cv_data+lv_compressed_len.
lv_adler32 = zcl_abapgit_hash=>adler32( cv_decompressed ).
IF cv_data(4) <> lv_adler32.
cv_data = cv_data+1.
ENDIF.
IF cv_data(4) <> lv_adler32.
cv_data = cv_data+1.
ENDIF.
IF cv_data(4) <> lv_adler32.
zcx_abapgit_exception=>raise( |Wrong Adler checksum| ).
ENDIF.
ENDMETHOD.
ENDCLASS.
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