List of constants in regex.inc

#define PCRE_CASELESS           0x00000001  /* Ignore Case */
#define PCRE_MULTILINE          0x00000002  /* Multilines (affects ^ and $ so that they match the start/end of a line rather than matching the start/end of the string). */
#define PCRE_DOTALL             0x00000004  /* Single line (affects . so that it matches any character, even new line characters). */
#define PCRE_EXTENDED           0x00000008  /* Pattern extension (ignore whitespace and # comments). */
#define PCRE_ANCHORED           0x00000010  /* Force pattern anchoring. */
#define PCRE_DOLLAR_ENDONLY     0x00000020  /* $ not to match newline at end. */
#define PCRE_UNGREEDY           0x00000200  /* Invert greediness of quantifiers */
#define PCRE_NOTEMPTY           0x00000400  /* An empty string is not a valid match. */
#define PCRE_UTF8               0x00000800  /* Use UTF-8 Chars */
#define PCRE_NO_UTF8_CHECK      0x00002000  /* Do not check the pattern for UTF-8 validity (only relevant if PCRE_UTF8 is set) */
#define PCRE_NEVER_UTF          0x00010000  /* Lock out interpretation of the pattern as UTF-8 */
#define PCRE_FIRSTLINE          0x00040000  /* Force matching to be before newline */
#define PCRE_DUPNAMES           0x00080000  /* Allow duplicate names for subpattern */
#define PCRE_NEWLINE_CR         0x00100000  /* Specify that a newline is indicated by a single character CR           )                            */
#define PCRE_NEWLINE_CRLF       0x00300000  /* specify that a newline is indicated by the two-character CRLF sequence )  Overrides the default     */
#define PCRE_NEWLINE_ANY        0x00400000  /* Specify that any Unicode newline sequence should be recognized.        )  newline definition (LF)   */
#define PCRE_NEWLINE_ANYCRLF    0x00500000  /* Specify that any of CR, LF and CRLF sequences should be recognized     )                            */
#define PCRE_UCP                0x20000000  /* Change the way PCRE processes \B, \b, \D, \d, \S, \s, \W, \w etc. to use Unicode properties */

enum /*RegexError*/
{
    REGEX_ERROR_NONE           =  0,    /* No error */
    REGEX_ERROR_NOMATCH        = -1,    /* No match was found */
    REGEX_ERROR_NULL           = -2,
    REGEX_ERROR_BADOPTION      = -3,
    REGEX_ERROR_BADMAGIC       = -4,
    REGEX_ERROR_UNKNOWN_OPCODE = -5,
    REGEX_ERROR_NOMEMORY       = -6,
    REGEX_ERROR_NOSUBSTRING    = -7,
    REGEX_ERROR_MATCHLIMIT     = -8,
    REGEX_ERROR_CALLOUT        = -9,    /* Never used by PCRE itself */
    REGEX_ERROR_BADUTF8        = -10,
    REGEX_ERROR_BADUTF8_OFFSET = -11,
    REGEX_ERROR_PARTIAL        = -12,
    REGEX_ERROR_BADPARTIAL     = -13,
    REGEX_ERROR_INTERNAL       = -14,
    REGEX_ERROR_BADCOUNT       = -15,
    REGEX_ERROR_DFA_UITEM      = -16,
    REGEX_ERROR_DFA_UCOND      = -17,
    REGEX_ERROR_DFA_UMLIMIT    = -18,
    REGEX_ERROR_DFA_WSSIZE     = -19,
    REGEX_ERROR_DFA_RECURSE    = -20,
    REGEX_ERROR_RECURSIONLIMIT = -21,
    REGEX_ERROR_NULLWSLIMIT    = -22,   /* No longer actually used */
    REGEX_ERROR_BADNEWLINE     = -23,
    REGEX_ERROR_BADOFFSET      = -24,
    REGEX_ERROR_SHORTUTF8      = -25,
    REGEX_ERROR_RECURSELOOP    = -26,
    REGEX_ERROR_JIT_STACKLIMIT = -27,
    REGEX_ERROR_BADMODE        = -28,
    REGEX_ERROR_BADENDIANNESS  = -29,
    REGEX_ERROR_DFA_BADRESTART = -30,
    REGEX_ERROR_JIT_BADOPTION  = -31,
    REGEX_ERROR_BADLENGTH      = -32,
    REGEX_ERROR_UNSET          = -33
};

#define REGEX_FORMAT_DEFAULT   0       /* Uses the standard formatting rules to replace matches */
#define REGEX_FORMAT_NOCOPY    (1<<0)  /* The sections that do not match the regular expression are not copied when replacing matches. */
#define REGEX_FORMAT_FIRSTONLY (1<<1)  /* Only the first occurrence of a regular expression is replaced. */