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Diffstat (limited to 'pcre/doc/pcretest.txt')
| -rw-r--r-- | pcre/doc/pcretest.txt | 406 |
1 files changed, 224 insertions, 182 deletions
diff --git a/pcre/doc/pcretest.txt b/pcre/doc/pcretest.txt index 2644e27a147..f0609939f5c 100644 --- a/pcre/doc/pcretest.txt +++ b/pcre/doc/pcretest.txt @@ -138,32 +138,35 @@ COMMAND LINE OPTIONS compiled. This is equivalent to adding /M to each regular expression. The size is given in bytes for both libraries. - -o osize Set the number of elements in the output vector that is used - when calling pcre[16|32]_exec() or pcre[16|32]_dfa_exec() to - be osize. The default value is 45, which is enough for 14 + -O Behave as if each pattern has the /O modifier, that is dis- + able auto-possessification for all patterns. + + -o osize Set the number of elements in the output vector that is used + when calling pcre[16|32]_exec() or pcre[16|32]_dfa_exec() to + be osize. The default value is 45, which is enough for 14 capturing subexpressions for pcre[16|32]_exec() or 22 differ- - ent matches for pcre[16|32]_dfa_exec(). The vector size can - be changed for individual matching calls by including \O in + ent matches for pcre[16|32]_dfa_exec(). The vector size can + be changed for individual matching calls by including \O in the data line (see below). - -p Behave as if each pattern has the /P modifier; the POSIX - wrapper API is used to call PCRE. None of the other options - has any effect when -p is set. This option can be used only + -p Behave as if each pattern has the /P modifier; the POSIX + wrapper API is used to call PCRE. None of the other options + has any effect when -p is set. This option can be used only with the 8-bit library. - -q Do not output the version number of pcretest at the start of + -q Do not output the version number of pcretest at the start of execution. - -S size On Unix-like systems, set the size of the run-time stack to + -S size On Unix-like systems, set the size of the run-time stack to size megabytes. - -s or -s+ Behave as if each pattern has the /S modifier; in other - words, force each pattern to be studied. If -s+ is used, all - the JIT compile options are passed to pcre[16|32]_study(), - causing just-in-time optimization to be set up if it is - available, for both full and partial matching. Specific JIT + -s or -s+ Behave as if each pattern has the /S modifier; in other + words, force each pattern to be studied. If -s+ is used, all + the JIT compile options are passed to pcre[16|32]_study(), + causing just-in-time optimization to be set up if it is + available, for both full and partial matching. Specific JIT compile options can be selected by following -s+ with a digit - in the range 1 to 7, which selects the JIT compile modes as + in the range 1 to 7, which selects the JIT compile modes as follows: 1 normal match only @@ -173,115 +176,119 @@ COMMAND LINE OPTIONS 6 soft and hard partial match 7 all three modes (default) - If -s++ is used instead of -s+ (with or without a following - digit), the text "(JIT)" is added to the first output line + If -s++ is used instead of -s+ (with or without a following + digit), the text "(JIT)" is added to the first output line after a match or no match when JIT-compiled code was actually used. - Note that there are pattern options that can override -s, + Note that there are pattern options that can override -s, either specifying no studying at all, or suppressing JIT com- pilation. - If the /I or /D option is present on a pattern (requesting - output about the compiled pattern), information about the - result of studying is not included when studying is caused - only by -s and neither -i nor -d is present on the command - line. This behaviour means that the output from tests that - are run with and without -s should be identical, except when + If the /I or /D option is present on a pattern (requesting + output about the compiled pattern), information about the + result of studying is not included when studying is caused + only by -s and neither -i nor -d is present on the command + line. This behaviour means that the output from tests that + are run with and without -s should be identical, except when options that output information about the actual running of a match are set. - The -M, -t, and -tm options, which give information about - resources used, are likely to produce different output with - and without -s. Output may also differ if the /C option is + The -M, -t, and -tm options, which give information about + resources used, are likely to produce different output with + and without -s. Output may also differ if the /C option is present on an individual pattern. This uses callouts to trace - the the matching process, and this may be different between - studied and non-studied patterns. If the pattern contains - (*MARK) items there may also be differences, for the same + the the matching process, and this may be different between + studied and non-studied patterns. If the pattern contains + (*MARK) items there may also be differences, for the same reason. The -s command line option can be overridden for spe- - cific patterns that should never be studied (see the /S pat- + cific patterns that should never be studied (see the /S pat- tern modifier below). - -t Run each compile, study, and match many times with a timer, - and output resulting time per compile or match (in millisec- - onds). Do not set -m with -t, because you will then get the - size output a zillion times, and the timing will be dis- - torted. You can control the number of iterations that are - used for timing by following -t with a number (as a separate - item on the command line). For example, "-t 1000" would iter- - ate 1000 times. The default is to iterate 500000 times. + -t Run each compile, study, and match many times with a timer, + and output the resulting times per compile, study, or match + (in milliseconds). Do not set -m with -t, because you will + then get the size output a zillion times, and the timing will + be distorted. You can control the number of iterations that + are used for timing by following -t with a number (as a sepa- + rate item on the command line). For example, "-t 1000" iter- + ates 1000 times. The default is to iterate 500000 times. -tm This is like -t except that it times only the matching phase, not the compile or study phases. + -T -TM These behave like -t and -tm, but in addition, at the end of + a run, the total times for all compiles, studies, and matches + are output. + DESCRIPTION - If pcretest is given two filename arguments, it reads from the first + If pcretest is given two filename arguments, it reads from the first and writes to the second. If it is given only one filename argument, it - reads from that file and writes to stdout. Otherwise, it reads from - stdin and writes to stdout, and prompts for each line of input, using + reads from that file and writes to stdout. Otherwise, it reads from + stdin and writes to stdout, and prompts for each line of input, using "re>" to prompt for regular expressions, and "data>" to prompt for data lines. - When pcretest is built, a configuration option can specify that it - should be linked with the libreadline library. When this is done, if + When pcretest is built, a configuration option can specify that it + should be linked with the libreadline library. When this is done, if the input is from a terminal, it is read using the readline() function. - This provides line-editing and history facilities. The output from the + This provides line-editing and history facilities. The output from the -help option states whether or not readline() will be used. The program handles any number of sets of input on a single input file. - Each set starts with a regular expression, and continues with any num- - ber of data lines to be matched against the pattern. + Each set starts with a regular expression, and continues with any num- + ber of data lines to be matched against that pattern. - Each data line is matched separately and independently. If you want to + Each data line is matched separately and independently. If you want to do multi-line matches, you have to use the \n escape sequence (or \r or \r\n, etc., depending on the newline setting) in a single line of input - to encode the newline sequences. There is no limit on the length of - data lines; the input buffer is automatically extended if it is too + to encode the newline sequences. There is no limit on the length of + data lines; the input buffer is automatically extended if it is too small. - An empty line signals the end of the data lines, at which point a new - regular expression is read. The regular expressions are given enclosed + An empty line signals the end of the data lines, at which point a new + regular expression is read. The regular expressions are given enclosed in any non-alphanumeric delimiters other than backslash, for example: /(a|bc)x+yz/ - White space before the initial delimiter is ignored. A regular expres- - sion may be continued over several input lines, in which case the new- - line characters are included within it. It is possible to include the + White space before the initial delimiter is ignored. A regular expres- + sion may be continued over several input lines, in which case the new- + line characters are included within it. It is possible to include the delimiter within the pattern by escaping it, for example /abc\/def/ - If you do so, the escape and the delimiter form part of the pattern, - but since delimiters are always non-alphanumeric, this does not affect - its interpretation. If the terminating delimiter is immediately fol- + If you do so, the escape and the delimiter form part of the pattern, + but since delimiters are always non-alphanumeric, this does not affect + its interpretation. If the terminating delimiter is immediately fol- lowed by a backslash, for example, /abc/\ - then a backslash is added to the end of the pattern. This is done to - provide a way of testing the error condition that arises if a pattern + then a backslash is added to the end of the pattern. This is done to + provide a way of testing the error condition that arises if a pattern finishes with a backslash, because /abc\/ - is interpreted as the first line of a pattern that starts with "abc/", + is interpreted as the first line of a pattern that starts with "abc/", causing pcretest to read the next line as a continuation of the regular expression. PATTERN MODIFIERS - A pattern may be followed by any number of modifiers, which are mostly - single characters, though some of these can be qualified by further - characters. Following Perl usage, these are referred to below as, for - example, "the /i modifier", even though the delimiter of the pattern - need not always be a slash, and no slash is used when writing modi- - fiers. White space may appear between the final pattern delimiter and - the first modifier, and between the modifiers themselves. For refer- - ence, here is a complete list of modifiers. They fall into several + A pattern may be followed by any number of modifiers, which are mostly + single characters, though some of these can be qualified by further + characters. Following Perl usage, these are referred to below as, for + example, "the /i modifier", even though the delimiter of the pattern + need not always be a slash, and no slash is used when writing modi- + fiers. White space may appear between the final pattern delimiter and + the first modifier, and between the modifiers themselves. For refer- + ence, here is a complete list of modifiers. They fall into several groups that are described in detail in the following sections. /8 set UTF mode @@ -307,6 +314,7 @@ PATTERN MODIFIERS /M show compiled memory size /m set PCRE_MULTILINE /N set PCRE_NO_AUTO_CAPTURE + /O set PCRE_NO_AUTO_POSSESS /P use the POSIX wrapper /S study the pattern after compilation /s set PCRE_DOTALL @@ -331,8 +339,8 @@ PATTERN MODIFIERS Perl-compatible modifiers The /i, /m, /s, and /x modifiers set the PCRE_CASELESS, PCRE_MULTILINE, - PCRE_DOTALL, or PCRE_EXTENDED options, respectively, when - pcre[16|32]_compile() is called. These four modifier letters have the + PCRE_DOTALL, or PCRE_EXTENDED options, respectively, when + pcre[16|32]_compile() is called. These four modifier letters have the same effect as they do in Perl. For example: /caseless/i @@ -340,7 +348,7 @@ PATTERN MODIFIERS Modifiers for other PCRE options - The following table shows additional modifiers for setting PCRE com- + The following table shows additional modifiers for setting PCRE com- pile-time options that do not correspond to anything in Perl: /8 PCRE_UTF8 ) when using the 8-bit @@ -359,6 +367,7 @@ PATTERN MODIFIERS /f PCRE_FIRSTLINE /J PCRE_DUPNAMES /N PCRE_NO_AUTO_CAPTURE + /O PCRE_NO_AUTO_POSSESS /U PCRE_UNGREEDY /W PCRE_UCP /X PCRE_EXTRA @@ -372,138 +381,138 @@ PATTERN MODIFIERS /<bsr_unicode> PCRE_BSR_UNICODE /<JS> PCRE_JAVASCRIPT_COMPAT - The modifiers that are enclosed in angle brackets are literal strings - as shown, including the angle brackets, but the letters within can be - in either case. This example sets multiline matching with CRLF as the + The modifiers that are enclosed in angle brackets are literal strings + as shown, including the angle brackets, but the letters within can be + in either case. This example sets multiline matching with CRLF as the line ending sequence: /^abc/m<CRLF> - As well as turning on the PCRE_UTF8/16/32 option, the /8 modifier - causes all non-printing characters in output strings to be printed + As well as turning on the PCRE_UTF8/16/32 option, the /8 modifier + causes all non-printing characters in output strings to be printed using the \x{hh...} notation. Otherwise, those less than 0x100 are out- put in hex without the curly brackets. - Full details of the PCRE options are given in the pcreapi documenta- + Full details of the PCRE options are given in the pcreapi documenta- tion. Finding all matches in a string - Searching for all possible matches within each subject string can be - requested by the /g or /G modifier. After finding a match, PCRE is + Searching for all possible matches within each subject string can be + requested by the /g or /G modifier. After finding a match, PCRE is called again to search the remainder of the subject string. The differ- ence between /g and /G is that the former uses the startoffset argument - to pcre[16|32]_exec() to start searching at a new point within the - entire string (which is in effect what Perl does), whereas the latter - passes over a shortened substring. This makes a difference to the - matching process if the pattern begins with a lookbehind assertion + to pcre[16|32]_exec() to start searching at a new point within the + entire string (which is in effect what Perl does), whereas the latter + passes over a shortened substring. This makes a difference to the + matching process if the pattern begins with a lookbehind assertion (including \b or \B). - If any call to pcre[16|32]_exec() in a /g or /G sequence matches an - empty string, the next call is done with the PCRE_NOTEMPTY_ATSTART and - PCRE_ANCHORED flags set in order to search for another, non-empty, - match at the same point. If this second match fails, the start offset - is advanced, and the normal match is retried. This imitates the way + If any call to pcre[16|32]_exec() in a /g or /G sequence matches an + empty string, the next call is done with the PCRE_NOTEMPTY_ATSTART and + PCRE_ANCHORED flags set in order to search for another, non-empty, + match at the same point. If this second match fails, the start offset + is advanced, and the normal match is retried. This imitates the way Perl handles such cases when using the /g modifier or the split() func- - tion. Normally, the start offset is advanced by one character, but if - the newline convention recognizes CRLF as a newline, and the current + tion. Normally, the start offset is advanced by one character, but if + the newline convention recognizes CRLF as a newline, and the current character is CR followed by LF, an advance of two is used. Other modifiers There are yet more modifiers for controlling the way pcretest operates. - The /+ modifier requests that as well as outputting the substring that - matched the entire pattern, pcretest should in addition output the - remainder of the subject string. This is useful for tests where the - subject contains multiple copies of the same substring. If the + modi- - fier appears twice, the same action is taken for captured substrings. - In each case the remainder is output on the following line with a plus - character following the capture number. Note that this modifier must - not immediately follow the /S modifier because /S+ and /S++ have other + The /+ modifier requests that as well as outputting the substring that + matched the entire pattern, pcretest should in addition output the + remainder of the subject string. This is useful for tests where the + subject contains multiple copies of the same substring. If the + modi- + fier appears twice, the same action is taken for captured substrings. + In each case the remainder is output on the following line with a plus + character following the capture number. Note that this modifier must + not immediately follow the /S modifier because /S+ and /S++ have other meanings. - The /= modifier requests that the values of all potential captured - parentheses be output after a match. By default, only those up to the + The /= modifier requests that the values of all potential captured + parentheses be output after a match. By default, only those up to the highest one actually used in the match are output (corresponding to the return code from pcre[16|32]_exec()). Values in the offsets vector cor- - responding to higher numbers should be set to -1, and these are output - as "<unset>". This modifier gives a way of checking that this is hap- + responding to higher numbers should be set to -1, and these are output + as "<unset>". This modifier gives a way of checking that this is hap- pening. - The /B modifier is a debugging feature. It requests that pcretest out- - put a representation of the compiled code after compilation. Normally - this information contains length and offset values; however, if /Z is - also present, this data is replaced by spaces. This is a special fea- - ture for use in the automatic test scripts; it ensures that the same + The /B modifier is a debugging feature. It requests that pcretest out- + put a representation of the compiled code after compilation. Normally + this information contains length and offset values; however, if /Z is + also present, this data is replaced by spaces. This is a special fea- + ture for use in the automatic test scripts; it ensures that the same output is generated for different internal link sizes. - The /D modifier is a PCRE debugging feature, and is equivalent to /BI, + The /D modifier is a PCRE debugging feature, and is equivalent to /BI, that is, both the /B and the /I modifiers. - The /F modifier causes pcretest to flip the byte order of the 2-byte + The /F modifier causes pcretest to flip the byte order of the 2-byte and 4-byte fields in the compiled pattern. This facility is for testing - the feature in PCRE that allows it to execute patterns that were com- + the feature in PCRE that allows it to execute patterns that were com- piled on a host with a different endianness. This feature is not avail- - able when the POSIX interface to PCRE is being used, that is, when the + able when the POSIX interface to PCRE is being used, that is, when the /P pattern modifier is specified. See also the section about saving and reloading compiled patterns below. - The /I modifier requests that pcretest output information about the - compiled pattern (whether it is anchored, has a fixed first character, - and so on). It does this by calling pcre[16|32]_fullinfo() after com- - piling a pattern. If the pattern is studied, the results of that are + The /I modifier requests that pcretest output information about the + compiled pattern (whether it is anchored, has a fixed first character, + and so on). It does this by calling pcre[16|32]_fullinfo() after com- + piling a pattern. If the pattern is studied, the results of that are also output. - The /K modifier requests pcretest to show names from backtracking con- - trol verbs that are returned from calls to pcre[16|32]_exec(). It - causes pcretest to create a pcre[16|32]_extra block if one has not - already been created by a call to pcre[16|32]_study(), and to set the - PCRE_EXTRA_MARK flag and the mark field within it, every time that - pcre[16|32]_exec() is called. If the variable that the mark field - points to is non-NULL for a match, non-match, or partial match, - pcretest prints the string to which it points. For a match, this is - shown on a line by itself, tagged with "MK:". For a non-match it is + The /K modifier requests pcretest to show names from backtracking con- + trol verbs that are returned from calls to pcre[16|32]_exec(). It + causes pcretest to create a pcre[16|32]_extra block if one has not + already been created by a call to pcre[16|32]_study(), and to set the + PCRE_EXTRA_MARK flag and the mark field within it, every time that + pcre[16|32]_exec() is called. If the variable that the mark field + points to is non-NULL for a match, non-match, or partial match, + pcretest prints the string to which it points. For a match, this is + shown on a line by itself, tagged with "MK:". For a non-match it is added to the message. - The /L modifier must be followed directly by the name of a locale, for + The /L modifier must be followed directly by the name of a locale, for example, /pattern/Lfr_FR For this reason, it must be the last modifier. The given locale is set, - pcre[16|32]_maketables() is called to build a set of character tables - for the locale, and this is then passed to pcre[16|32]_compile() when - compiling the regular expression. Without an /L (or /T) modifier, NULL - is passed as the tables pointer; that is, /L applies only to the + pcre[16|32]_maketables() is called to build a set of character tables + for the locale, and this is then passed to pcre[16|32]_compile() when + compiling the regular expression. Without an /L (or /T) modifier, NULL + is passed as the tables pointer; that is, /L applies only to the expression on which it appears. - The /M modifier causes the size in bytes of the memory block used to - hold the compiled pattern to be output. This does not include the size - of the pcre[16|32] block; it is just the actual compiled data. If the + The /M modifier causes the size in bytes of the memory block used to + hold the compiled pattern to be output. This does not include the size + of the pcre[16|32] block; it is just the actual compiled data. If the pattern is successfully studied with the PCRE_STUDY_JIT_COMPILE option, the size of the JIT compiled code is also output. - The /S modifier causes pcre[16|32]_study() to be called after the - expression has been compiled, and the results used when the expression + The /S modifier causes pcre[16|32]_study() to be called after the + expression has been compiled, and the results used when the expression is matched. There are a number of qualifying characters that may follow /S. They may appear in any order. - If S is followed by an exclamation mark, pcre[16|32]_study() is called - with the PCRE_STUDY_EXTRA_NEEDED option, causing it always to return a + If /S is followed by an exclamation mark, pcre[16|32]_study() is called + with the PCRE_STUDY_EXTRA_NEEDED option, causing it always to return a pcre_extra block, even when studying discovers no useful information. If /S is followed by a second S character, it suppresses studying, even - if it was requested externally by the -s command line option. This - makes it possible to specify that certain patterns are always studied, + if it was requested externally by the -s command line option. This + makes it possible to specify that certain patterns are always studied, and others are never studied, independently of -s. This feature is used in the test files in a few cases where the output is different when the pattern is studied. - If the /S modifier is followed by a + character, the call to - pcre[16|32]_study() is made with all the JIT study options, requesting - just-in-time optimization support if it is available, for both normal - and partial matching. If you want to restrict the JIT compiling modes, + If the /S modifier is followed by a + character, the call to + pcre[16|32]_study() is made with all the JIT study options, requesting + just-in-time optimization support if it is available, for both normal + and partial matching. If you want to restrict the JIT compiling modes, you can follow /S+ with a digit in the range 1 to 7: 1 normal match only @@ -514,40 +523,40 @@ PATTERN MODIFIERS 7 all three modes (default) If /S++ is used instead of /S+ (with or without a following digit), the - text "(JIT)" is added to the first output line after a match or no + text "(JIT)" is added to the first output line after a match or no match when JIT-compiled code was actually used. - Note that there is also an independent /+ modifier; it must not be + Note that there is also an independent /+ modifier; it must not be given immediately after /S or /S+ because this will be misinterpreted. If JIT studying is successful, the compiled JIT code will automatically - be used when pcre[16|32]_exec() is run, except when incompatible run- - time options are specified. For more details, see the pcrejit documen- - tation. See also the \J escape sequence below for a way of setting the + be used when pcre[16|32]_exec() is run, except when incompatible run- + time options are specified. For more details, see the pcrejit documen- + tation. See also the \J escape sequence below for a way of setting the size of the JIT stack. - Finally, if /S is followed by a minus character, JIT compilation is - suppressed, even if it was requested externally by the -s command line - option. This makes it possible to specify that JIT is never to be used + Finally, if /S is followed by a minus character, JIT compilation is + suppressed, even if it was requested externally by the -s command line + option. This makes it possible to specify that JIT is never to be used for certain patterns. - The /T modifier must be followed by a single digit. It causes a spe- + The /T modifier must be followed by a single digit. It causes a spe- cific set of built-in character tables to be passed to pcre[16|32]_com- - pile(). It is used in the standard PCRE tests to check behaviour with + pile(). It is used in the standard PCRE tests to check behaviour with different character tables. The digit specifies the tables as follows: 0 the default ASCII tables, as distributed in pcre_chartables.c.dist 1 a set of tables defining ISO 8859 characters - In table 1, some characters whose codes are greater than 128 are iden- + In table 1, some characters whose codes are greater than 128 are iden- tified as letters, digits, spaces, etc. Using the POSIX wrapper API - The /P modifier causes pcretest to call PCRE via the POSIX wrapper API - rather than its native API. This supports only the 8-bit library. When - /P is set, the following modifiers set options for the regcomp() func- + The /P modifier causes pcretest to call PCRE via the POSIX wrapper API + rather than its native API. This supports only the 8-bit library. When + /P is set, the following modifiers set options for the regcomp() func- tion: /i REG_ICASE @@ -558,9 +567,40 @@ PATTERN MODIFIERS /W REG_UCP ) the POSIX standard /8 REG_UTF8 ) - The /+ modifier works as described above. All other modifiers are + The /+ modifier works as described above. All other modifiers are ignored. + Locking out certain modifiers + + PCRE can be compiled with or without support for certain features such + as UTF-8/16/32 or Unicode properties. Accordingly, the standard tests + are split up into a number of different files that are selected for + running depending on which features are available. When updating the + tests, it is all too easy to put a new test into the wrong file by mis- + take; for example, to put a test that requires UTF support into a file + that is used when it is not available. To help detect such mistakes as + early as possible, there is a facility for locking out specific modi- + fiers. If an input line for pcretest starts with the string "< forbid " + the following sequence of characters is taken as a list of forbidden + modifiers. For example, in the test files that must not use UTF or Uni- + code property support, this line appears: + + < forbid 8W + + This locks out the /8 and /W modifiers. An immediate error is given if + they are subsequently encountered. If the character string contains < + but not >, all the multi-character modifiers that begin with < are + locked out. Otherwise, such modifiers must be explicitly listed, for + example: + + < forbid <JS><cr> + + There must be a single space between < and "forbid" for this feature to + be recognised. If there is not, the line is interpreted either as a + request to re-load a pre-compiled pattern (see "SAVING AND RELOADING + COMPILED PATTERNS" below) or, if there is a another < character, as a + pattern that uses < as its delimiter. + DATA LINES @@ -583,6 +623,7 @@ DATA LINES \v vertical tab (\x0b) \nnn octal character (up to 3 octal digits); always a byte unless > 255 in UTF-8 or 16-bit or 32-bit mode + \o{dd...} octal character (any number of octal digits} \xhh hexadecimal byte (up to 2 hex digits) \x{hh...} hexadecimal character (any number of hex digits) \A pass the PCRE_ANCHORED option to pcre[16|32]_exec() @@ -974,50 +1015,51 @@ SAVING AND RELOADING COMPILED PATTERNS writing the file, pcretest expects to read a new pattern. A saved pattern can be reloaded into pcretest by specifying < and a - file name instead of a pattern. The name of the file must not contain a - < character, as otherwise pcretest will interpret the line as a pattern - delimited by < characters. For example: + file name instead of a pattern. There must be no space between < and + the file name, which must not contain a < character, as otherwise + pcretest will interpret the line as a pattern delimited by < charac- + ters. For example: re> </some/file Compiled pattern loaded from /some/file No study data - If the pattern was previously studied with the JIT optimization, the - JIT information cannot be saved and restored, and so is lost. When the - pattern has been loaded, pcretest proceeds to read data lines in the + If the pattern was previously studied with the JIT optimization, the + JIT information cannot be saved and restored, and so is lost. When the + pattern has been loaded, pcretest proceeds to read data lines in the usual way. - You can copy a file written by pcretest to a different host and reload - it there, even if the new host has opposite endianness to the one on - which the pattern was compiled. For example, you can compile on an i86 - machine and run on a SPARC machine. When a pattern is reloaded on a + You can copy a file written by pcretest to a different host and reload + it there, even if the new host has opposite endianness to the one on + which the pattern was compiled. For example, you can compile on an i86 + machine and run on a SPARC machine. When a pattern is reloaded on a host with different endianness, the confirmation message is changed to: Compiled pattern (byte-inverted) loaded from /some/file The test suite contains some saved pre-compiled patterns with different - endianness. These are reloaded using "<!" instead of just "<". This + endianness. These are reloaded using "<!" instead of just "<". This suppresses the "(byte-inverted)" text so that the output is the same on - all hosts. It also forces debugging output once the pattern has been + all hosts. It also forces debugging output once the pattern has been reloaded. - File names for saving and reloading can be absolute or relative, but - note that the shell facility of expanding a file name that starts with + File names for saving and reloading can be absolute or relative, but + note that the shell facility of expanding a file name that starts with a tilde (~) is not available. - The ability to save and reload files in pcretest is intended for test- - ing and experimentation. It is not intended for production use because - only a single pattern can be written to a file. Furthermore, there is - no facility for supplying custom character tables for use with a - reloaded pattern. If the original pattern was compiled with custom - tables, an attempt to match a subject string using a reloaded pattern - is likely to cause pcretest to crash. Finally, if you attempt to load + The ability to save and reload files in pcretest is intended for test- + ing and experimentation. It is not intended for production use because + only a single pattern can be written to a file. Furthermore, there is + no facility for supplying custom character tables for use with a + reloaded pattern. If the original pattern was compiled with custom + tables, an attempt to match a subject string using a reloaded pattern + is likely to cause pcretest to crash. Finally, if you attempt to load a file that is not in the correct format, the result is undefined. SEE ALSO - pcre(3), pcre16(3), pcre32(3), pcreapi(3), pcrecallout(3), pcrejit, + pcre(3), pcre16(3), pcre32(3), pcreapi(3), pcrecallout(3), pcrejit, pcrematching(3), pcrepartial(d), pcrepattern(3), pcreprecompile(3). @@ -1030,5 +1072,5 @@ AUTHOR REVISION - Last updated: 26 April 2013 + Last updated: 12 November 2013 Copyright (c) 1997-2013 University of Cambridge. |