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- RCSFILE(5L) UNKNOWN SECTION OF THE MANUAL RCSFILE(5L)
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- NAME
- rcsfile - format of RCS file
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- DESCRIPTION
- An RCS file is an ASCII file. Its contents are described by
- the grammar below. The text is free format, i.e., spaces,
- tabs and new lines have no significance except in strings.
- Strings are enclosed by `@'. If a string contains a `@', it
- must be doubled.
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- The meta syntax uses the following conventions: `|' (bar)
- separates alternatives; `{' and `}' enclose optional
- phrases; `{' and `}*' enclose phrases that may be repeated
- zero or more times; `{' and '}+' enclose phrases that must
- appear at least once and may be repeated; `<' and `>'
- enclose nonterminals.
-
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- <rcstext> ::= <admin> {<delta>}* <desc> {<deltatext>}*
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- <admin> ::= head {<num>};
- branch {<num>};
- access {<id>}*;
- symbols {<id> : <num>}*;
- locks {<id> : <num>}*;
- comment {<string>};
-
- <delta> ::= <num>
- date <num>;
- author <id>;
- state {<id>};
- branches {<num>}*;
- next {<num>};
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- <desc> ::= desc <string>
-
- <deltatext> ::= <num>
- log <string>
- text <string>
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- <num> ::= {<digit>{.}}+
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- <digit> ::= 0 | 1 | ... | 9
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- <id> ::= <letter>{<idchar>}*
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- <letter> ::= A | B | ... | Z | a | b | ... | z
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- <idchar> ::= Any printing ASCII character except space,
- tab, carriage return, new line, and <special>.
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- RCSFILE(5L) UNKNOWN SECTION OF THE MANUAL RCSFILE(5L)
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- <special> ::= ; | : | , | @
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- <string> ::= @{any ASCII character, with `@' doubled}*@
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- Identifiers are case sensitive. Keywords are in lower case
- only. The sets of keywords and identifiers may overlap.
-
- The <delta> nodes form a tree. All nodes whose numbers con-
- sist of a single pair (e.g., 2.3, 2.1, 1.3, etc.) are on the
- "trunk", and are linked through the next field in order of
- decreasing numbers. The head field in the <admin> node
- points to the head of that sequence (i.e., contains the
- highest pair). The branch node in the admin node indicates
- the default branch (or revision) for most RCS operations. If
- empty, the default branch is the highest branch on the
- trunk.
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- All <delta> nodes whose numbers consist of 2n fields (n>_2)
- (e.g., 3.1.1.1, 2.1.2.2, etc.) are linked as follows. All
- nodes whose first (2n)-1 number fields are identical are
- linked through the next field in order of increasing
- numbers. For each such sequence, the <delta> node whose
- number is identical to the first 2(n-1) number fields of the
- deltas on that sequence is called the branchpoint. The
- branches field of a node contains a list of the numbers of
- the first nodes of all sequences for which it is a bran-
- chpoint. This list is ordered in increasing numbers.
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- RCSFILE(5L) UNKNOWN SECTION OF THE MANUAL RCSFILE(5L)
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- Example:
- Head
- |
- |
- v
- ---------
- / \ / \ | | / \ / \
- / \ / \ | 2.1 | / \ / \
- / \ / \ | | / \ / \
- /1.2.1.3\ /1.3.1.1\ | | /1.2.2.2\ /1.2.2.1.1.1\
- --------- --------- --------- --------- -------------
- ^ ^ | ^ ^
- | | | | |
- | | v | |
- / \ | --------- / \ |
- / \ | \ 1.3 / / \ |
- / \ ---------\ / / \-----------
- /1.2.1.1\ \ / /1.2.2.1\
- --------- \ / ---------
- ^ | ^
- | | |
- | v |
- | --------- |
- | \ 1.2 / |
- ----------------------\ /---------
- \ /
- \ /
- |
- |
- v
- ---------
- \ 1.1 /
- \ /
- \ /
- \ /
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- Fig. 1: A revision tree
-
- IDENTIFICATION
- Author: Walter F. Tichy, Purdue University, West Lafayette,
- IN, 47907.
- Revision Number: 1.2 ; Release Date: 89/05/02 .
- Copyright c 1982, 1988, 1989 by Walter F. Tichy.
-
- SEE ALSO
- ci(1L), co(1L), ident(1L), rcs(1L), rcsdiff(1L),
- rcsmerge(1L), rlog(1L),
- Walter F. Tichy, "Design, Implementation, and Evaluation of
- a Revision Control System," in _P_r_o_c_e_e_d_i_n_g_s _o_f _t_h_e _6_t_h _I_n_t_e_r_-
- _n_a_t_i_o_n_a_l _C_o_n_f_e_r_e_n_c_e _o_n _S_o_f_t_w_a_r_e _E_n_g_i_n_e_e_r_i_n_g, IEEE, Tokyo,
- Sept. 1982.
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