diff options
Diffstat (limited to 'internal.h')
| -rw-r--r-- | internal.h | 53 |
1 files changed, 42 insertions, 11 deletions
@@ -9,7 +9,7 @@ the file Tech.Notes for some information on the internals. Written by: Philip Hazel <ph10@cam.ac.uk> - Copyright (c) 1997-2000 University of Cambridge + Copyright (c) 1997-2001 University of Cambridge ----------------------------------------------------------------------------- Permission is granted to anyone to use this software for any purpose on any @@ -123,12 +123,36 @@ typedef int BOOL; #define FALSE 0 #define TRUE 1 +/* Escape items that are just an encoding of a particular data value. Note that +ESC_N is defined as yet another macro, which is set in config.h to either \n +(the default) or \r (which some people want). */ + +#ifndef ESC_E +#define ESC_E 27 +#endif + +#ifndef ESC_F +#define ESC_F '\f' +#endif + +#ifndef ESC_N +#define ESC_N NEWLINE +#endif + +#ifndef ESC_R +#define ESC_R '\r' +#endif + +#ifndef ESC_T +#define ESC_T '\t' +#endif + /* These are escaped items that aren't just an encoding of a particular data value such as \n. They must have non-zero values, as check_escape() returns their negation. Also, they must appear in the same order as in the opcode definitions below, up to ESC_z. The final one must be ESC_REF as subsequent values are used for \1, \2, \3, etc. There is a test in the code for an escape -greater than ESC_b and less than ESC_X to detect the types that may be +greater than ESC_b and less than ESC_Z to detect the types that may be repeated. If any new escapes are put in-between that don't consume a character, that code will have to change. */ @@ -224,19 +248,26 @@ enum { OP_ONCE, /* Once matched, don't back up into the subpattern */ OP_COND, /* Conditional group */ - OP_CREF, /* Used to hold an extraction string number */ + OP_CREF, /* Used to hold an extraction string number (cond ref) */ OP_BRAZERO, /* These two must remain together and in this */ OP_BRAMINZERO, /* order. */ + OP_BRANUMBER, /* Used for extracting brackets whose number is greater + than can fit into an opcode. */ + OP_BRA /* This and greater values are used for brackets that - extract substrings. */ + extract substrings up to a basic limit. After that, + use is made of OP_BRANUMBER. */ }; -/* The highest extraction number. This is limited by the number of opcodes -left after OP_BRA, i.e. 255 - OP_BRA. We actually set it somewhat lower. */ +/* The highest extraction number before we have to start using additional +bytes. (Originally PCRE didn't have support for extraction counts highter than +this number.) The value is limited by the number of opcodes left after OP_BRA, +i.e. 255 - OP_BRA. We actually set it a bit lower to leave room for additional +opcodes. */ -#define EXTRACT_MAX 99 +#define EXTRACT_BASIC_MAX 150 /* The texts of compile-time error messages are defined as macros here so that they can be accessed by the POSIX wrapper and converted into error codes. Yes, @@ -255,13 +286,13 @@ just to accommodate the POSIX wrapper. */ #define ERR10 "operand of unlimited repeat could match the empty string" #define ERR11 "internal error: unexpected repeat" #define ERR12 "unrecognized character after (?" -#define ERR13 "too many capturing parenthesized sub-patterns" +#define ERR13 "unused error" #define ERR14 "missing )" #define ERR15 "back reference to non-existent subpattern" #define ERR16 "erroffset passed as NULL" #define ERR17 "unknown option bit(s) set" #define ERR18 "missing ) after comment" -#define ERR19 "too many sets of parentheses" +#define ERR19 "parentheses nested too deeply" #define ERR20 "regular expression too large" #define ERR21 "failed to get memory" #define ERR22 "unmatched parentheses" @@ -296,8 +327,8 @@ typedef struct real_pcre { size_t size; const unsigned char *tables; unsigned long int options; - uschar top_bracket; - uschar top_backref; + unsigned short int top_bracket; + unsigned short int top_backref; uschar first_char; uschar req_char; uschar code[1]; |