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Diffstat (limited to 'gdb/regex.h')
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diff --git a/gdb/regex.h b/gdb/regex.h new file mode 100644 index 0000000..c9f082d --- /dev/null +++ b/gdb/regex.h @@ -0,0 +1,267 @@ +/* Definitions for data structures callers pass the regex library. + Copyright (C) 1985 Free Software Foundation, Inc. + + NO WARRANTY + + BECAUSE THIS PROGRAM IS LICENSED FREE OF CHARGE, WE PROVIDE ABSOLUTELY +NO WARRANTY, TO THE EXTENT PERMITTED BY APPLICABLE STATE LAW. EXCEPT +WHEN OTHERWISE STATED IN WRITING, FREE SOFTWARE FOUNDATION, INC, +RICHARD M. STALLMAN AND/OR OTHER PARTIES PROVIDE THIS PROGRAM "AS IS" +WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, +BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND +FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY +AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE +DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR +CORRECTION. + + IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW WILL RICHARD M. +STALLMAN, THE FREE SOFTWARE FOUNDATION, INC., AND/OR ANY OTHER PARTY +WHO MAY MODIFY AND REDISTRIBUTE THIS PROGRAM AS PERMITTED BELOW, BE +LIABLE TO YOU FOR DAMAGES, INCLUDING ANY LOST PROFITS, LOST MONIES, OR +OTHER SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE +USE OR INABILITY TO USE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR +DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY THIRD PARTIES OR +A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS) THIS +PROGRAM, EVEN IF YOU HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH +DAMAGES, OR FOR ANY CLAIM BY ANY OTHER PARTY. + + GENERAL PUBLIC LICENSE TO COPY + + 1. You may copy and distribute verbatim copies of this source file +as you receive it, in any medium, provided that you conspicuously and +appropriately publish on each copy a valid copyright notice "Copyright +(C) 1985 Free Software Foundation, Inc."; and include following the +copyright notice a verbatim copy of the above disclaimer of warranty +and of this License. You may charge a distribution fee for the +physical act of transferring a copy. + + 2. You may modify your copy or copies of this source file or +any portion of it, and copy and distribute such modifications under +the terms of Paragraph 1 above, provided that you also do the following: + + a) cause the modified files to carry prominent notices stating + that you changed the files and the date of any change; and + + b) cause the whole of any work that you distribute or publish, + that in whole or in part contains or is a derivative of this + program or any part thereof, to be licensed at no charge to all + third parties on terms identical to those contained in this + License Agreement (except that you may choose to grant more extensive + warranty protection to some or all third parties, at your option). + + c) You may charge a distribution fee for the physical act of + transferring a copy, and you may at your option offer warranty + protection in exchange for a fee. + +Mere aggregation of another unrelated program with this program (or its +derivative) on a volume of a storage or distribution medium does not bring +the other program under the scope of these terms. + + 3. You may copy and distribute this program (or a portion or derivative +of it, under Paragraph 2) in object code or executable form under the terms +of Paragraphs 1 and 2 above provided that you also do one of the following: + + a) accompany it with the complete corresponding machine-readable + source code, which must be distributed under the terms of + Paragraphs 1 and 2 above; or, + + b) accompany it with a written offer, valid for at least three + years, to give any third party free (except for a nominal + shipping charge) a complete machine-readable copy of the + corresponding source code, to be distributed under the terms of + Paragraphs 1 and 2 above; or, + + c) accompany it with the information you received as to where the + corresponding source code may be obtained. (This alternative is + allowed only for noncommercial distribution and only if you + received the program in object code or executable form alone.) + +For an executable file, complete source code means all the source code for +all modules it contains; but, as a special exception, it need not include +source code for modules which are standard libraries that accompany the +operating system on which the executable file runs. + + 4. You may not copy, sublicense, distribute or transfer this program +except as expressly provided under this License Agreement. Any attempt +otherwise to copy, sublicense, distribute or transfer this program is void and +your rights to use the program under this License agreement shall be +automatically terminated. However, parties who have received computer +software programs from you with this License Agreement will not have +their licenses terminated so long as such parties remain in full compliance. + + 5. If you wish to incorporate parts of this program into other free +programs whose distribution conditions are different, write to the Free +Software Foundation at 675 Mass Ave, Cambridge, MA 02139. We have not yet +worked out a simple rule that can be stated here, but we will often permit +this. We will be guided by the two goals of preserving the free status of +all derivatives of our free software and of promoting the sharing and reuse of +software. + + +In other words, you are welcome to use, share and improve this program. +You are forbidden to forbid anyone else to use, share and improve +what you give them. Help stamp out software-hoarding! */ + + +/* Define number of parens for which we record the beginnings and ends. + This affects how much space the `struct re_registers' type takes up. */ +#ifndef RE_NREGS +#define RE_NREGS 10 +#endif + +/* These bits are used in the obscure_syntax variable to choose among + alternative regexp syntaxes. */ + +/* 1 means plain parentheses serve as grouping, and backslash + parentheses are needed for literal searching. + 0 means backslash-parentheses are grouping, and plain parentheses + are for literal searching. */ +#define RE_NO_BK_PARENS 1 + +/* 1 means plain | serves as the "or"-operator, and \| is a literal. + 0 means \| serves as the "or"-operator, and | is a literal. */ +#define RE_NO_BK_VBAR 2 + +/* 0 means plain + or ? serves as an operator, and \+, \? are literals. + 1 means \+, \? are operators and plain +, ? are literals. */ +#define RE_BK_PLUS_QM 4 + +/* 1 means | binds tighter than ^ or $. + 0 means the contrary. */ +#define RE_TIGHT_VBAR 8 + +/* 1 means treat \n as an _OR operator + 0 means treat it as a normal character */ +#define RE_NEWLINE_OR 16 + +/* 0 means that a special characters (such as *, ^, and $) always have + their special meaning regardless of the surrounding context. + 1 means that special characters may act as normal characters in some + contexts. Specifically, this applies to: + ^ - only special at the beginning, or after ( or | + $ - only special at the end, or before ) or | + *, +, ? - only special when not after the beginning, (, or | */ +#define RE_CONTEXT_INDEP_OPS 32 + +/* Now define combinations of bits for the standard possibilities. */ +#define RE_SYNTAX_AWK (RE_NO_BK_PARENS | RE_NO_BK_VBAR | RE_CONTEXT_INDEP_OPS) +#define RE_SYNTAX_EGREP (RE_SYNTAX_AWK | RE_NEWLINE_OR) +#define RE_SYNTAX_GREP (RE_BK_PLUS_QM | RE_NEWLINE_OR) +#define RE_SYNTAX_EMACS 0 + +/* This data structure is used to represent a compiled pattern. */ + +struct re_pattern_buffer + { + char *buffer; /* Space holding the compiled pattern commands. */ + int allocated; /* Size of space that buffer points to */ + int used; /* Length of portion of buffer actually occupied */ + char *fastmap; /* Pointer to fastmap, if any, or zero if none. */ + /* re_search uses the fastmap, if there is one, + to skip quickly over totally implausible characters */ + char *translate; /* Translate table to apply to all characters before comparing. + Or zero for no translation. + The translation is applied to a pattern when it is compiled + and to data when it is matched. */ + char fastmap_accurate; + /* Set to zero when a new pattern is stored, + set to one when the fastmap is updated from it. */ + char can_be_null; /* Set to one by compiling fastmap + if this pattern might match the null string. + It does not necessarily match the null string + in that case, but if this is zero, it cannot. + 2 as value means can match null string + but at end of range or before a character + listed in the fastmap. */ + }; + +/* Structure to store "register" contents data in. + + Pass the address of such a structure as an argument to re_match, etc., + if you want this information back. + + start[i] and end[i] record the string matched by \( ... \) grouping i, + for i from 1 to RE_NREGS - 1. + start[0] and end[0] record the entire string matched. */ + +struct re_registers + { + int start[RE_NREGS]; + int end[RE_NREGS]; + }; + +/* These are the command codes that appear in compiled regular expressions, one per byte. + Some command codes are followed by argument bytes. + A command code can specify any interpretation whatever for its arguments. + Zero-bytes may appear in the compiled regular expression. */ + +enum regexpcode + { + unused, + exactn, /* followed by one byte giving n, and then by n literal bytes */ + begline, /* fails unless at beginning of line */ + endline, /* fails unless at end of line */ + jump, /* followed by two bytes giving relative address to jump to */ + on_failure_jump, /* followed by two bytes giving relative address of place + to resume at in case of failure. */ + finalize_jump, /* Throw away latest failure point and then jump to address. */ + maybe_finalize_jump, /* Like jump but finalize if safe to do so. + This is used to jump back to the beginning + of a repeat. If the command that follows + this jump is clearly incompatible with the + one at the beginning of the repeat, such that + we can be sure that there is no use backtracking + out of repetitions already completed, + then we finalize. */ + dummy_failure_jump, /* jump, and push a dummy failure point. + This failure point will be thrown away + if an attempt is made to use it for a failure. + A + construct makes this before the first repeat. */ + anychar, /* matches any one character */ + charset, /* matches any one char belonging to specified set. + First following byte is # bitmap bytes. + Then come bytes for a bit-map saying which chars are in. + Bits in each byte are ordered low-bit-first. + A character is in the set if its bit is 1. + A character too large to have a bit in the map + is automatically not in the set */ + charset_not, /* similar but match any character that is NOT one of those specified */ + start_memory, /* starts remembering the text that is matched + and stores it in a memory register. + followed by one byte containing the register number. + Register numbers must be in the range 0 through NREGS. */ + stop_memory, /* stops remembering the text that is matched + and stores it in a memory register. + followed by one byte containing the register number. + Register numbers must be in the range 0 through NREGS. */ + duplicate, /* match a duplicate of something remembered. + Followed by one byte containing the index of the memory register. */ + before_dot, /* Succeeds if before dot */ + at_dot, /* Succeeds if at dot */ + after_dot, /* Succeeds if after dot */ + begbuf, /* Succeeds if at beginning of buffer */ + endbuf, /* Succeeds if at end of buffer */ + wordchar, /* Matches any word-constituent character */ + notwordchar, /* Matches any char that is not a word-constituent */ + wordbeg, /* Succeeds if at word beginning */ + wordend, /* Succeeds if at word end */ + wordbound, /* Succeeds if at a word boundary */ + notwordbound, /* Succeeds if not at a word boundary */ + syntaxspec, /* Matches any character whose syntax is specified. + followed by a byte which contains a syntax code, Sword or such like */ + notsyntaxspec /* Matches any character whose syntax differs from the specified. */ + }; + +extern char *re_compile_pattern (); +/* Is this really advertised? */ +extern void re_compile_fastmap (); +extern int re_search (), re_search_2 (); +extern int re_match (), re_match_2 (); + +/* 4.2 bsd compatibility (yuck) */ +extern char *re_comp (); +extern int re_exec (); + +#ifdef SYNTAX_TABLE +extern char *re_syntax_table; +#endif |