--- /dev/null
+/*************************************************
+* Perl-Compatible Regular Expressions *
+*************************************************/
+
+/* PCRE is a library of functions to support regular expressions whose syntax
+and semantics are as close as possible to those of the Perl 5 language.
+
+ Written by Philip Hazel
+ Original API code Copyright (c) 1997-2012 University of Cambridge
+ New API code Copyright (c) 2016-2018 University of Cambridge
+
+-----------------------------------------------------------------------------
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+
+ * Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+
+ * Neither the name of the University of Cambridge nor the names of its
+ contributors may be used to endorse or promote products derived from
+ this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+-----------------------------------------------------------------------------
+*/
+
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "pcre2_internal.h"
+
+#define TYPE_OPTIONS (PCRE2_CONVERT_GLOB| \
+ PCRE2_CONVERT_POSIX_BASIC|PCRE2_CONVERT_POSIX_EXTENDED)
+
+#define ALL_OPTIONS (PCRE2_CONVERT_UTF|PCRE2_CONVERT_NO_UTF_CHECK| \
+ PCRE2_CONVERT_GLOB_NO_WILD_SEPARATOR| \
+ PCRE2_CONVERT_GLOB_NO_STARSTAR| \
+ TYPE_OPTIONS)
+
+#define DUMMY_BUFFER_SIZE 100
+
+/* Generated pattern fragments */
+
+#define STR_BACKSLASH_A STR_BACKSLASH STR_A
+#define STR_BACKSLASH_z STR_BACKSLASH STR_z
+#define STR_COLON_RIGHT_SQUARE_BRACKET STR_COLON STR_RIGHT_SQUARE_BRACKET
+#define STR_DOT_STAR_LOOKBEHIND STR_DOT STR_ASTERISK STR_LEFT_PARENTHESIS STR_QUESTION_MARK STR_LESS_THAN_SIGN STR_EQUALS_SIGN
+#define STR_LOOKAHEAD_NOT_DOT STR_LEFT_PARENTHESIS STR_QUESTION_MARK STR_EXCLAMATION_MARK STR_BACKSLASH STR_DOT STR_RIGHT_PARENTHESIS
+#define STR_QUERY_s STR_LEFT_PARENTHESIS STR_QUESTION_MARK STR_s STR_RIGHT_PARENTHESIS
+#define STR_STAR_NUL STR_LEFT_PARENTHESIS STR_ASTERISK STR_N STR_U STR_L STR_RIGHT_PARENTHESIS
+
+/* States for range and POSIX processing */
+
+enum { RANGE_NOT_STARTED, RANGE_STARTING, RANGE_STARTED };
+enum { POSIX_START_REGEX, POSIX_ANCHORED, POSIX_NOT_BRACKET,
+ POSIX_CLASS_NOT_STARTED, POSIX_CLASS_STARTING, POSIX_CLASS_STARTED };
+
+/* Macro to add a character string to the output buffer, checking for overflow. */
+
+#define PUTCHARS(string) \
+ { \
+ for (s = (char *)(string); *s != 0; s++) \
+ { \
+ if (p >= endp) return PCRE2_ERROR_NOMEMORY; \
+ *p++ = *s; \
+ } \
+ }
+
+/* Literals that must be escaped: \ ? * + | . ^ $ { } [ ] ( ) */
+
+static const char *pcre2_escaped_literals =
+ STR_BACKSLASH STR_QUESTION_MARK STR_ASTERISK STR_PLUS
+ STR_VERTICAL_LINE STR_DOT STR_CIRCUMFLEX_ACCENT STR_DOLLAR_SIGN
+ STR_LEFT_CURLY_BRACKET STR_RIGHT_CURLY_BRACKET
+ STR_LEFT_SQUARE_BRACKET STR_RIGHT_SQUARE_BRACKET
+ STR_LEFT_PARENTHESIS STR_RIGHT_PARENTHESIS;
+
+/* Recognized escaped metacharacters in POSIX basic patterns. */
+
+static const char *posix_meta_escapes =
+ STR_LEFT_PARENTHESIS STR_RIGHT_PARENTHESIS
+ STR_LEFT_CURLY_BRACKET STR_RIGHT_CURLY_BRACKET
+ STR_1 STR_2 STR_3 STR_4 STR_5 STR_6 STR_7 STR_8 STR_9;
+
+
+
+/*************************************************
+* Convert a POSIX pattern *
+*************************************************/
+
+/* This function handles both basic and extended POSIX patterns.
+
+Arguments:
+ pattype the pattern type
+ pattern the pattern
+ plength length in code units
+ utf TRUE if UTF
+ use_buffer where to put the output
+ use_length length of use_buffer
+ bufflenptr where to put the used length
+ dummyrun TRUE if a dummy run
+ ccontext the convert context
+
+Returns: 0 => success
+ !0 => error code
+*/
+
+static int
+convert_posix(uint32_t pattype, PCRE2_SPTR pattern, PCRE2_SIZE plength,
+ BOOL utf, PCRE2_UCHAR *use_buffer, PCRE2_SIZE use_length,
+ PCRE2_SIZE *bufflenptr, BOOL dummyrun, pcre2_convert_context *ccontext)
+{
+char *s;
+PCRE2_SPTR posix = pattern;
+PCRE2_UCHAR *p = use_buffer;
+PCRE2_UCHAR *pp = p;
+PCRE2_UCHAR *endp = p + use_length - 1; /* Allow for trailing zero */
+PCRE2_SIZE convlength = 0;
+
+uint32_t bracount = 0;
+uint32_t posix_state = POSIX_START_REGEX;
+uint32_t lastspecial = 0;
+BOOL extended = (pattype & PCRE2_CONVERT_POSIX_EXTENDED) != 0;
+BOOL nextisliteral = FALSE;
+
+(void)utf; /* Not used when Unicode not supported */
+(void)ccontext; /* Not currently used */
+
+/* Initialize default for error offset as end of input. */
+
+*bufflenptr = plength;
+PUTCHARS(STR_STAR_NUL);
+
+/* Now scan the input. */
+
+while (plength > 0)
+ {
+ uint32_t c, sc;
+ int clength = 1;
+
+ /* Add in the length of the last item, then, if in the dummy run, pull the
+ pointer back to the start of the (temporary) buffer and then remember the
+ start of the next item. */
+
+ convlength += p - pp;
+ if (dummyrun) p = use_buffer;
+ pp = p;
+
+ /* Pick up the next character */
+
+#ifndef SUPPORT_UNICODE
+ c = *posix;
+#else
+ GETCHARLENTEST(c, posix, clength);
+#endif
+ posix += clength;
+ plength -= clength;
+
+ sc = nextisliteral? 0 : c;
+ nextisliteral = FALSE;
+
+ /* Handle a character within a class. */
+
+ if (posix_state >= POSIX_CLASS_NOT_STARTED)
+ {
+ if (c == CHAR_RIGHT_SQUARE_BRACKET)
+ {
+ PUTCHARS(STR_RIGHT_SQUARE_BRACKET);
+ posix_state = POSIX_NOT_BRACKET;
+ }
+
+ /* Not the end of the class */
+
+ else
+ {
+ switch (posix_state)
+ {
+ case POSIX_CLASS_STARTED:
+ if (c <= 127 && islower(c)) break; /* Remain in started state */
+ posix_state = POSIX_CLASS_NOT_STARTED;
+ if (c == CHAR_COLON && plength > 0 &&
+ *posix == CHAR_RIGHT_SQUARE_BRACKET)
+ {
+ PUTCHARS(STR_COLON_RIGHT_SQUARE_BRACKET);
+ plength--;
+ posix++;
+ continue; /* With next character after :] */
+ }
+ /* Fall through */
+
+ case POSIX_CLASS_NOT_STARTED:
+ if (c == CHAR_LEFT_SQUARE_BRACKET)
+ posix_state = POSIX_CLASS_STARTING;
+ break;
+
+ case POSIX_CLASS_STARTING:
+ if (c == CHAR_COLON) posix_state = POSIX_CLASS_STARTED;
+ break;
+ }
+
+ if (c == CHAR_BACKSLASH) PUTCHARS(STR_BACKSLASH);
+ if (p + clength > endp) return PCRE2_ERROR_NOMEMORY;
+ memcpy(p, posix - clength, CU2BYTES(clength));
+ p += clength;
+ }
+ }
+
+ /* Handle a character not within a class. */
+
+ else switch(sc)
+ {
+ case CHAR_LEFT_SQUARE_BRACKET:
+ PUTCHARS(STR_LEFT_SQUARE_BRACKET);
+
+#ifdef NEVER
+ /* We could handle special cases [[:<:]] and [[:>:]] (which PCRE does
+ support) but they are not part of POSIX 1003.1. */
+
+ if (plength >= 6)
+ {
+ if (posix[0] == CHAR_LEFT_SQUARE_BRACKET &&
+ posix[1] == CHAR_COLON &&
+ (posix[2] == CHAR_LESS_THAN_SIGN ||
+ posix[2] == CHAR_GREATER_THAN_SIGN) &&
+ posix[3] == CHAR_COLON &&
+ posix[4] == CHAR_RIGHT_SQUARE_BRACKET &&
+ posix[5] == CHAR_RIGHT_SQUARE_BRACKET)
+ {
+ if (p + 6 > endp) return PCRE2_ERROR_NOMEMORY;
+ memcpy(p, posix, CU2BYTES(6));
+ p += 6;
+ posix += 6;
+ plength -= 6;
+ continue; /* With next character */
+ }
+ }
+#endif
+
+ /* Handle start of "normal" character classes */
+
+ posix_state = POSIX_CLASS_NOT_STARTED;
+
+ /* Handle ^ and ] as first characters */
+
+ if (plength > 0)
+ {
+ if (*posix == CHAR_CIRCUMFLEX_ACCENT)
+ {
+ posix++;
+ plength--;
+ PUTCHARS(STR_CIRCUMFLEX_ACCENT);
+ }
+ if (plength > 0 && *posix == CHAR_RIGHT_SQUARE_BRACKET)
+ {
+ posix++;
+ plength--;
+ PUTCHARS(STR_RIGHT_SQUARE_BRACKET);
+ }
+ }
+ break;
+
+ case CHAR_BACKSLASH:
+ if (plength <= 0) return PCRE2_ERROR_END_BACKSLASH;
+ if (extended) nextisliteral = TRUE; else
+ {
+ if (*posix < 127 && strchr(posix_meta_escapes, *posix) != NULL)
+ {
+ if (isdigit(*posix)) PUTCHARS(STR_BACKSLASH);
+ if (p + 1 > endp) return PCRE2_ERROR_NOMEMORY;
+ lastspecial = *p++ = *posix++;
+ plength--;
+ }
+ else nextisliteral = TRUE;
+ }
+ break;
+
+ case CHAR_RIGHT_PARENTHESIS:
+ if (!extended || bracount == 0) goto ESCAPE_LITERAL;
+ bracount--;
+ goto COPY_SPECIAL;
+
+ case CHAR_LEFT_PARENTHESIS:
+ bracount++;
+ /* Fall through */
+
+ case CHAR_QUESTION_MARK:
+ case CHAR_PLUS:
+ case CHAR_LEFT_CURLY_BRACKET:
+ case CHAR_RIGHT_CURLY_BRACKET:
+ case CHAR_VERTICAL_LINE:
+ if (!extended) goto ESCAPE_LITERAL;
+ /* Fall through */
+
+ case CHAR_DOT:
+ case CHAR_DOLLAR_SIGN:
+ posix_state = POSIX_NOT_BRACKET;
+ COPY_SPECIAL:
+ lastspecial = c;
+ if (p + 1 > endp) return PCRE2_ERROR_NOMEMORY;
+ *p++ = c;
+ break;
+
+ case CHAR_ASTERISK:
+ if (lastspecial != CHAR_ASTERISK)
+ {
+ if (!extended && (posix_state < POSIX_NOT_BRACKET ||
+ lastspecial == CHAR_LEFT_PARENTHESIS))
+ goto ESCAPE_LITERAL;
+ goto COPY_SPECIAL;
+ }
+ break; /* Ignore second and subsequent asterisks */
+
+ case CHAR_CIRCUMFLEX_ACCENT:
+ if (extended) goto COPY_SPECIAL;
+ if (posix_state == POSIX_START_REGEX ||
+ lastspecial == CHAR_LEFT_PARENTHESIS)
+ {
+ posix_state = POSIX_ANCHORED;
+ goto COPY_SPECIAL;
+ }
+ /* Fall through */
+
+ default:
+ if (c < 128 && strchr(pcre2_escaped_literals, c) != NULL)
+ {
+ ESCAPE_LITERAL:
+ PUTCHARS(STR_BACKSLASH);
+ }
+ lastspecial = 0xff; /* Indicates nothing special */
+ if (p + clength > endp) return PCRE2_ERROR_NOMEMORY;
+ memcpy(p, posix - clength, CU2BYTES(clength));
+ p += clength;
+ posix_state = POSIX_NOT_BRACKET;
+ break;
+ }
+ }
+
+if (posix_state >= POSIX_CLASS_NOT_STARTED)
+ return PCRE2_ERROR_MISSING_SQUARE_BRACKET;
+convlength += p - pp; /* Final segment */
+*bufflenptr = convlength;
+*p++ = 0;
+return 0;
+}
+
+
+/*************************************************
+* Convert a glob pattern *
+*************************************************/
+
+/* Context for writing the output into a buffer. */
+
+typedef struct pcre2_output_context {
+ PCRE2_UCHAR *output; /* current output position */
+ PCRE2_SPTR output_end; /* output end */
+ PCRE2_SIZE output_size; /* size of the output */
+ uint8_t out_str[8]; /* string copied to the output */
+} pcre2_output_context;
+
+
+/* Write a character into the output.
+
+Arguments:
+ out output context
+ chr the next character
+*/
+
+static void
+convert_glob_write(pcre2_output_context *out, PCRE2_UCHAR chr)
+{
+out->output_size++;
+
+if (out->output < out->output_end)
+ *out->output++ = chr;
+}
+
+
+/* Write a string into the output.
+
+Arguments:
+ out output context
+ length length of out->out_str
+*/
+
+static void
+convert_glob_write_str(pcre2_output_context *out, PCRE2_SIZE length)
+{
+uint8_t *out_str = out->out_str;
+PCRE2_UCHAR *output = out->output;
+PCRE2_SPTR output_end = out->output_end;
+PCRE2_SIZE output_size = out->output_size;
+
+do
+ {
+ output_size++;
+
+ if (output < output_end)
+ *output++ = *out_str++;
+ }
+while (--length != 0);
+
+out->output = output;
+out->output_size = output_size;
+}
+
+
+/* Prints the separator into the output.
+
+Arguments:
+ out output context
+ separator glob separator
+ with_escape backslash is needed before separator
+*/
+
+static void
+convert_glob_print_separator(pcre2_output_context *out,
+ PCRE2_UCHAR separator, BOOL with_escape)
+{
+if (with_escape)
+ convert_glob_write(out, CHAR_BACKSLASH);
+
+convert_glob_write(out, separator);
+}
+
+
+/* Prints a wildcard into the output.
+
+Arguments:
+ out output context
+ separator glob separator
+ with_escape backslash is needed before separator
+*/
+
+static void
+convert_glob_print_wildcard(pcre2_output_context *out,
+ PCRE2_UCHAR separator, BOOL with_escape)
+{
+out->out_str[0] = CHAR_LEFT_SQUARE_BRACKET;
+out->out_str[1] = CHAR_CIRCUMFLEX_ACCENT;
+convert_glob_write_str(out, 2);
+
+convert_glob_print_separator(out, separator, with_escape);
+
+convert_glob_write(out, CHAR_RIGHT_SQUARE_BRACKET);
+}
+
+
+/* Parse a posix class.
+
+Arguments:
+ from starting point of scanning the range
+ pattern_end end of pattern
+ out output context
+
+Returns: >0 => class index
+ 0 => malformed class
+*/
+
+static int
+convert_glob_parse_class(PCRE2_SPTR *from, PCRE2_SPTR pattern_end,
+ pcre2_output_context *out)
+{
+static const char *posix_classes = "alnum:alpha:ascii:blank:cntrl:digit:"
+ "graph:lower:print:punct:space:upper:word:xdigit:";
+PCRE2_SPTR start = *from + 1;
+PCRE2_SPTR pattern = start;
+const char *class_ptr;
+PCRE2_UCHAR c;
+int class_index;
+
+while (TRUE)
+ {
+ if (pattern >= pattern_end) return 0;
+
+ c = *pattern++;
+
+ if (c < CHAR_a || c > CHAR_z) break;
+ }
+
+if (c != CHAR_COLON || pattern >= pattern_end ||
+ *pattern != CHAR_RIGHT_SQUARE_BRACKET)
+ return 0;
+
+class_ptr = posix_classes;
+class_index = 1;
+
+while (TRUE)
+ {
+ if (*class_ptr == CHAR_NUL) return 0;
+
+ pattern = start;
+
+ while (*pattern == (PCRE2_UCHAR) *class_ptr)
+ {
+ if (*pattern == CHAR_COLON)
+ {
+ pattern += 2;
+ start -= 2;
+
+ do convert_glob_write(out, *start++); while (start < pattern);
+
+ *from = pattern;
+ return class_index;
+ }
+ pattern++;
+ class_ptr++;
+ }
+
+ while (*class_ptr != CHAR_COLON) class_ptr++;
+ class_ptr++;
+ class_index++;
+ }
+}
+
+/* Checks whether the character is in the class.
+
+Arguments:
+ class_index class index
+ c character
+
+Returns: !0 => character is found in the class
+ 0 => otherwise
+*/
+
+static BOOL
+convert_glob_char_in_class(int class_index, PCRE2_UCHAR c)
+{
+switch (class_index)
+ {
+ case 1: return isalnum(c);
+ case 2: return isalpha(c);
+ case 3: return 1;
+ case 4: return c == CHAR_HT || c == CHAR_SPACE;
+ case 5: return iscntrl(c);
+ case 6: return isdigit(c);
+ case 7: return isgraph(c);
+ case 8: return islower(c);
+ case 9: return isprint(c);
+ case 10: return ispunct(c);
+ case 11: return isspace(c);
+ case 12: return isupper(c);
+ case 13: return isalnum(c) || c == CHAR_UNDERSCORE;
+ default: return isxdigit(c);
+ }
+}
+
+/* Parse a range of characters.
+
+Arguments:
+ from starting point of scanning the range
+ pattern_end end of pattern
+ out output context
+ separator glob separator
+ with_escape backslash is needed before separator
+
+Returns: 0 => success
+ !0 => error code
+*/
+
+static int
+convert_glob_parse_range(PCRE2_SPTR *from, PCRE2_SPTR pattern_end,
+ pcre2_output_context *out, BOOL utf, PCRE2_UCHAR separator,
+ BOOL with_escape, PCRE2_UCHAR escape, BOOL no_wildsep)
+{
+BOOL is_negative = FALSE;
+BOOL separator_seen = FALSE;
+BOOL has_prev_c;
+PCRE2_SPTR pattern = *from;
+PCRE2_SPTR char_start = NULL;
+uint32_t c, prev_c;
+int len, class_index;
+
+(void)utf; /* Avoid compiler warning. */
+
+if (pattern >= pattern_end)
+ {
+ *from = pattern;
+ return PCRE2_ERROR_MISSING_SQUARE_BRACKET;
+ }
+
+if (*pattern == CHAR_EXCLAMATION_MARK
+ || *pattern == CHAR_CIRCUMFLEX_ACCENT)
+ {
+ pattern++;
+
+ if (pattern >= pattern_end)
+ {
+ *from = pattern;
+ return PCRE2_ERROR_MISSING_SQUARE_BRACKET;
+ }
+
+ is_negative = TRUE;
+
+ out->out_str[0] = CHAR_LEFT_SQUARE_BRACKET;
+ out->out_str[1] = CHAR_CIRCUMFLEX_ACCENT;
+ len = 2;
+
+ if (!no_wildsep)
+ {
+ if (with_escape)
+ {
+ out->out_str[len] = CHAR_BACKSLASH;
+ len++;
+ }
+ out->out_str[len] = (uint8_t) separator;
+ }
+
+ convert_glob_write_str(out, len + 1);
+ }
+else
+ convert_glob_write(out, CHAR_LEFT_SQUARE_BRACKET);
+
+has_prev_c = FALSE;
+prev_c = 0;
+
+if (*pattern == CHAR_RIGHT_SQUARE_BRACKET)
+ {
+ out->out_str[0] = CHAR_BACKSLASH;
+ out->out_str[1] = CHAR_RIGHT_SQUARE_BRACKET;
+ convert_glob_write_str(out, 2);
+ has_prev_c = TRUE;
+ prev_c = CHAR_RIGHT_SQUARE_BRACKET;
+ pattern++;
+ }
+
+while (pattern < pattern_end)
+ {
+ char_start = pattern;
+ GETCHARINCTEST(c, pattern);
+
+ if (c == CHAR_RIGHT_SQUARE_BRACKET)
+ {
+ convert_glob_write(out, c);
+
+ if (!is_negative && !no_wildsep && separator_seen)
+ {
+ out->out_str[0] = CHAR_LEFT_PARENTHESIS;
+ out->out_str[1] = CHAR_QUESTION_MARK;
+ out->out_str[2] = CHAR_LESS_THAN_SIGN;
+ out->out_str[3] = CHAR_EXCLAMATION_MARK;
+ convert_glob_write_str(out, 4);
+
+ convert_glob_print_separator(out, separator, with_escape);
+ convert_glob_write(out, CHAR_RIGHT_PARENTHESIS);
+ }
+
+ *from = pattern;
+ return 0;
+ }
+
+ if (pattern >= pattern_end) break;
+
+ if (c == CHAR_LEFT_SQUARE_BRACKET && *pattern == CHAR_COLON)
+ {
+ *from = pattern;
+ class_index = convert_glob_parse_class(from, pattern_end, out);
+
+ if (class_index != 0)
+ {
+ pattern = *from;
+
+ has_prev_c = FALSE;
+ prev_c = 0;
+
+ if (!is_negative &&
+ convert_glob_char_in_class (class_index, separator))
+ separator_seen = TRUE;
+ continue;
+ }
+ }
+ else if (c == CHAR_MINUS && has_prev_c &&
+ *pattern != CHAR_RIGHT_SQUARE_BRACKET)
+ {
+ convert_glob_write(out, CHAR_MINUS);
+
+ char_start = pattern;
+ GETCHARINCTEST(c, pattern);
+
+ if (pattern >= pattern_end) break;
+
+ if (escape != 0 && c == escape)
+ {
+ char_start = pattern;
+ GETCHARINCTEST(c, pattern);
+ }
+ else if (c == CHAR_LEFT_SQUARE_BRACKET && *pattern == CHAR_COLON)
+ {
+ *from = pattern;
+ return PCRE2_ERROR_CONVERT_SYNTAX;
+ }
+
+ if (prev_c > c)
+ {
+ *from = pattern;
+ return PCRE2_ERROR_CONVERT_SYNTAX;
+ }
+
+ if (prev_c < separator && separator < c) separator_seen = TRUE;
+
+ has_prev_c = FALSE;
+ prev_c = 0;
+ }
+ else
+ {
+ if (escape != 0 && c == escape)
+ {
+ char_start = pattern;
+ GETCHARINCTEST(c, pattern);
+
+ if (pattern >= pattern_end) break;
+ }
+
+ has_prev_c = TRUE;
+ prev_c = c;
+ }
+
+ if (c == CHAR_LEFT_SQUARE_BRACKET || c == CHAR_RIGHT_SQUARE_BRACKET ||
+ c == CHAR_BACKSLASH || c == CHAR_MINUS)
+ convert_glob_write(out, CHAR_BACKSLASH);
+
+ if (c == separator) separator_seen = TRUE;
+
+ do convert_glob_write(out, *char_start++); while (char_start < pattern);
+ }
+
+*from = pattern;
+return PCRE2_ERROR_MISSING_SQUARE_BRACKET;
+}
+
+
+/* Prints a (*COMMIT) into the output.
+
+Arguments:
+ out output context
+*/
+
+static void
+convert_glob_print_commit(pcre2_output_context *out)
+{
+out->out_str[0] = CHAR_LEFT_PARENTHESIS;
+out->out_str[1] = CHAR_ASTERISK;
+out->out_str[2] = CHAR_C;
+out->out_str[3] = CHAR_O;
+out->out_str[4] = CHAR_M;
+out->out_str[5] = CHAR_M;
+out->out_str[6] = CHAR_I;
+out->out_str[7] = CHAR_T;
+convert_glob_write_str(out, 8);
+convert_glob_write(out, CHAR_RIGHT_PARENTHESIS);
+}
+
+
+/* Bash glob converter.
+
+Arguments:
+ pattype the pattern type
+ pattern the pattern
+ plength length in code units
+ utf TRUE if UTF
+ use_buffer where to put the output
+ use_length length of use_buffer
+ bufflenptr where to put the used length
+ dummyrun TRUE if a dummy run
+ ccontext the convert context
+
+Returns: 0 => success
+ !0 => error code
+*/
+
+static int
+convert_glob(uint32_t options, PCRE2_SPTR pattern, PCRE2_SIZE plength,
+ BOOL utf, PCRE2_UCHAR *use_buffer, PCRE2_SIZE use_length,
+ PCRE2_SIZE *bufflenptr, BOOL dummyrun, pcre2_convert_context *ccontext)
+{
+pcre2_output_context out;
+PCRE2_SPTR pattern_start = pattern;
+PCRE2_SPTR pattern_end = pattern + plength;
+PCRE2_UCHAR separator = ccontext->glob_separator;
+PCRE2_UCHAR escape = ccontext->glob_escape;
+PCRE2_UCHAR c;
+BOOL no_wildsep = (options & PCRE2_CONVERT_GLOB_NO_WILD_SEPARATOR) != 0;
+BOOL no_starstar = (options & PCRE2_CONVERT_GLOB_NO_STARSTAR) != 0;
+BOOL in_atomic = FALSE;
+BOOL after_starstar = FALSE;
+BOOL no_slash_z = FALSE;
+BOOL with_escape, is_start, after_separator;
+int result = 0;
+
+(void)utf; /* Avoid compiler warning. */
+
+#ifdef SUPPORT_UNICODE
+if (utf && (separator >= 128 || escape >= 128))
+ {
+ /* Currently only ASCII characters are supported. */
+ *bufflenptr = 0;
+ return PCRE2_ERROR_CONVERT_SYNTAX;
+ }
+#endif
+
+with_escape = strchr(pcre2_escaped_literals, separator) != NULL;
+
+/* Initialize default for error offset as end of input. */
+out.output = use_buffer;
+out.output_end = use_buffer + use_length;
+out.output_size = 0;
+
+out.out_str[0] = CHAR_LEFT_PARENTHESIS;
+out.out_str[1] = CHAR_QUESTION_MARK;
+out.out_str[2] = CHAR_s;
+out.out_str[3] = CHAR_RIGHT_PARENTHESIS;
+convert_glob_write_str(&out, 4);
+
+is_start = TRUE;
+
+if (pattern < pattern_end && pattern[0] == CHAR_ASTERISK)
+ {
+ if (no_wildsep)
+ is_start = FALSE;
+ else if (!no_starstar && pattern + 1 < pattern_end &&
+ pattern[1] == CHAR_ASTERISK)
+ is_start = FALSE;
+ }
+
+if (is_start)
+ {
+ out.out_str[0] = CHAR_BACKSLASH;
+ out.out_str[1] = CHAR_A;
+ convert_glob_write_str(&out, 2);
+ }
+
+while (pattern < pattern_end)
+ {
+ c = *pattern++;
+
+ if (c == CHAR_ASTERISK)
+ {
+ is_start = pattern == pattern_start + 1;
+
+ if (in_atomic)
+ {
+ convert_glob_write(&out, CHAR_RIGHT_PARENTHESIS);
+ in_atomic = FALSE;
+ }
+
+ if (!no_starstar && pattern < pattern_end && *pattern == CHAR_ASTERISK)
+ {
+ after_separator = is_start || (pattern[-2] == separator);
+
+ do pattern++; while (pattern < pattern_end &&
+ *pattern == CHAR_ASTERISK);
+
+ if (pattern >= pattern_end)
+ {
+ no_slash_z = TRUE;
+ break;
+ }
+
+ after_starstar = TRUE;
+
+ if (after_separator && escape != 0 && *pattern == escape &&
+ pattern + 1 < pattern_end && pattern[1] == separator)
+ pattern++;
+
+ if (is_start)
+ {
+ if (*pattern != separator) continue;
+
+ out.out_str[0] = CHAR_LEFT_PARENTHESIS;
+ out.out_str[1] = CHAR_QUESTION_MARK;
+ out.out_str[2] = CHAR_COLON;
+ out.out_str[3] = CHAR_BACKSLASH;
+ out.out_str[4] = CHAR_A;
+ out.out_str[5] = CHAR_VERTICAL_LINE;
+ convert_glob_write_str(&out, 6);
+
+ convert_glob_print_separator(&out, separator, with_escape);
+ convert_glob_write(&out, CHAR_RIGHT_PARENTHESIS);
+
+ pattern++;
+ continue;
+ }
+
+ convert_glob_print_commit(&out);
+
+ if (!after_separator || *pattern != separator)
+ {
+ out.out_str[0] = CHAR_DOT;
+ out.out_str[1] = CHAR_ASTERISK;
+ out.out_str[2] = CHAR_QUESTION_MARK;
+ convert_glob_write_str(&out, 3);
+ continue;
+ }
+
+ out.out_str[0] = CHAR_LEFT_PARENTHESIS;
+ out.out_str[1] = CHAR_QUESTION_MARK;
+ out.out_str[2] = CHAR_COLON;
+ out.out_str[3] = CHAR_DOT;
+ out.out_str[4] = CHAR_ASTERISK;
+ out.out_str[5] = CHAR_QUESTION_MARK;
+
+ convert_glob_write_str(&out, 6);
+
+ convert_glob_print_separator(&out, separator, with_escape);
+
+ out.out_str[0] = CHAR_RIGHT_PARENTHESIS;
+ out.out_str[1] = CHAR_QUESTION_MARK;
+ out.out_str[2] = CHAR_QUESTION_MARK;
+ convert_glob_write_str(&out, 3);
+
+ pattern++;
+ continue;
+ }
+
+ if (pattern < pattern_end && *pattern == CHAR_ASTERISK)
+ {
+ do pattern++; while (pattern < pattern_end &&
+ *pattern == CHAR_ASTERISK);
+ }
+
+ if (no_wildsep)
+ {
+ if (pattern >= pattern_end)
+ {
+ no_slash_z = TRUE;
+ break;
+ }
+
+ /* Start check must be after the end check. */
+ if (is_start) continue;
+ }
+
+ if (!is_start)
+ {
+ if (after_starstar)
+ {
+ out.out_str[0] = CHAR_LEFT_PARENTHESIS;
+ out.out_str[1] = CHAR_QUESTION_MARK;
+ out.out_str[2] = CHAR_GREATER_THAN_SIGN;
+ convert_glob_write_str(&out, 3);
+ in_atomic = TRUE;
+ }
+ else
+ convert_glob_print_commit(&out);
+ }
+
+ if (no_wildsep)
+ convert_glob_write(&out, CHAR_DOT);
+ else
+ convert_glob_print_wildcard(&out, separator, with_escape);
+
+ out.out_str[0] = CHAR_ASTERISK;
+ out.out_str[1] = CHAR_QUESTION_MARK;
+ if (pattern >= pattern_end)
+ out.out_str[1] = CHAR_PLUS;
+ convert_glob_write_str(&out, 2);
+ continue;
+ }
+
+ if (c == CHAR_QUESTION_MARK)
+ {
+ if (no_wildsep)
+ convert_glob_write(&out, CHAR_DOT);
+ else
+ convert_glob_print_wildcard(&out, separator, with_escape);
+ continue;
+ }
+
+ if (c == CHAR_LEFT_SQUARE_BRACKET)
+ {
+ result = convert_glob_parse_range(&pattern, pattern_end,
+ &out, utf, separator, with_escape, escape, no_wildsep);
+ if (result != 0) break;
+ continue;
+ }
+
+ if (escape != 0 && c == escape)
+ {
+ if (pattern >= pattern_end)
+ {
+ result = PCRE2_ERROR_CONVERT_SYNTAX;
+ break;
+ }
+ c = *pattern++;
+ }
+
+ if (c < 128 && strchr(pcre2_escaped_literals, c) != NULL)
+ convert_glob_write(&out, CHAR_BACKSLASH);
+
+ convert_glob_write(&out, c);
+ }
+
+if (result == 0)
+ {
+ if (!no_slash_z)
+ {
+ out.out_str[0] = CHAR_BACKSLASH;
+ out.out_str[1] = CHAR_z;
+ convert_glob_write_str(&out, 2);
+ }
+
+ if (in_atomic)
+ convert_glob_write(&out, CHAR_RIGHT_PARENTHESIS);
+
+ convert_glob_write(&out, CHAR_NUL);
+
+ if (!dummyrun && out.output_size != (PCRE2_SIZE) (out.output - use_buffer))
+ result = PCRE2_ERROR_NOMEMORY;
+ }
+
+if (result != 0)
+ {
+ *bufflenptr = pattern - pattern_start;
+ return result;
+ }
+
+*bufflenptr = out.output_size - 1;
+return 0;
+}
+
+
+/*************************************************
+* Convert pattern *
+*************************************************/
+
+/* This is the external-facing function for converting other forms of pattern
+into PCRE2 regular expression patterns. On error, the bufflenptr argument is
+used to return an offset in the original pattern.
+
+Arguments:
+ pattern the input pattern
+ plength length of input, or PCRE2_ZERO_TERMINATED
+ options options bits
+ buffptr pointer to pointer to output buffer
+ bufflenptr pointer to length of output buffer
+ ccontext convert context or NULL
+
+Returns: 0 for success, else an error code (+ve or -ve)
+*/
+
+PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
+pcre2_pattern_convert(PCRE2_SPTR pattern, PCRE2_SIZE plength, uint32_t options,
+ PCRE2_UCHAR **buffptr, PCRE2_SIZE *bufflenptr,
+ pcre2_convert_context *ccontext)
+{
+int i, rc;
+PCRE2_UCHAR dummy_buffer[DUMMY_BUFFER_SIZE];
+PCRE2_UCHAR *use_buffer = dummy_buffer;
+PCRE2_SIZE use_length = DUMMY_BUFFER_SIZE;
+BOOL utf = (options & PCRE2_CONVERT_UTF) != 0;
+uint32_t pattype = options & TYPE_OPTIONS;
+
+if (pattern == NULL || bufflenptr == NULL) return PCRE2_ERROR_NULL;
+
+if ((options & ~ALL_OPTIONS) != 0 || /* Undefined bit set */
+ (pattype & (~pattype+1)) != pattype || /* More than one type set */
+ pattype == 0) /* No type set */
+ {
+ *bufflenptr = 0; /* Error offset */
+ return PCRE2_ERROR_BADOPTION;
+ }
+
+if (plength == PCRE2_ZERO_TERMINATED) plength = PRIV(strlen)(pattern);
+if (ccontext == NULL) ccontext =
+ (pcre2_convert_context *)(&PRIV(default_convert_context));
+
+/* Check UTF if required. */
+
+#ifndef SUPPORT_UNICODE
+if (utf)
+ {
+ *bufflenptr = 0; /* Error offset */
+ return PCRE2_ERROR_UNICODE_NOT_SUPPORTED;
+ }
+#else
+if (utf && (options & PCRE2_CONVERT_NO_UTF_CHECK) == 0)
+ {
+ PCRE2_SIZE erroroffset;
+ rc = PRIV(valid_utf)(pattern, plength, &erroroffset);
+ if (rc != 0)
+ {
+ *bufflenptr = erroroffset;
+ return rc;
+ }
+ }
+#endif
+
+/* If buffptr is not NULL, and what it points to is not NULL, we are being
+provided with a buffer and a length, so set them as the buffer to use. */
+
+if (buffptr != NULL && *buffptr != NULL)
+ {
+ use_buffer = *buffptr;
+ use_length = *bufflenptr;
+ }
+
+/* Call an individual converter, either just once (if a buffer was provided or
+just the length is needed), or twice (if a memory allocation is required). */
+
+for (i = 0; i < 2; i++)
+ {
+ PCRE2_UCHAR *allocated;
+ BOOL dummyrun = buffptr == NULL || *buffptr == NULL;
+
+ switch(pattype)
+ {
+ case PCRE2_CONVERT_GLOB:
+ rc = convert_glob(options & ~PCRE2_CONVERT_GLOB, pattern, plength, utf,
+ use_buffer, use_length, bufflenptr, dummyrun, ccontext);
+ break;
+
+ case PCRE2_CONVERT_POSIX_BASIC:
+ case PCRE2_CONVERT_POSIX_EXTENDED:
+ rc = convert_posix(pattype, pattern, plength, utf, use_buffer, use_length,
+ bufflenptr, dummyrun, ccontext);
+ break;
+
+ default:
+ *bufflenptr = 0; /* Error offset */
+ return PCRE2_ERROR_INTERNAL;
+ }
+
+ if (rc != 0 || /* Error */
+ buffptr == NULL || /* Just the length is required */
+ *buffptr != NULL) /* Buffer was provided or allocated */
+ return rc;
+
+ /* Allocate memory for the buffer, with hidden space for an allocator at
+ the start. The next time round the loop runs the conversion for real. */
+
+ allocated = PRIV(memctl_malloc)(sizeof(pcre2_memctl) +
+ (*bufflenptr + 1)*PCRE2_CODE_UNIT_WIDTH, (pcre2_memctl *)ccontext);
+ if (allocated == NULL) return PCRE2_ERROR_NOMEMORY;
+ *buffptr = (PCRE2_UCHAR *)(((char *)allocated) + sizeof(pcre2_memctl));
+
+ use_buffer = *buffptr;
+ use_length = *bufflenptr + 1;
+ }
+
+/* Control should never get here. */
+
+return PCRE2_ERROR_INTERNAL;
+}
+
+
+/*************************************************
+* Free converted pattern *
+*************************************************/
+
+/* This frees a converted pattern that was put in newly-allocated memory.
+
+Argument: the converted pattern
+Returns: nothing
+*/
+
+PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
+pcre2_converted_pattern_free(PCRE2_UCHAR *converted)
+{
+if (converted != NULL)
+ {
+ pcre2_memctl *memctl =
+ (pcre2_memctl *)((char *)converted - sizeof(pcre2_memctl));
+ memctl->free(memctl, memctl->memory_data);
+ }
+}
+
+/* End of pcre2_convert.c */
projects / ossec-hids.git / blobdiff