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46 .TH REGEX.H 3HEAD "Sep 9, 2004"
48 regex.h, regex \- regular expression matching types
52 #include <\fBregex.h\fR>
58 The <\fBregex.h\fR> header defines the structures and symbolic constants used
59 by the \fBregcomp()\fR, \fBregexec()\fR, \fBregerror()\fR, and \fBregfree()\fR
60 functions. See \fBregcomp\fR(3C).
63 The structure type \fBregex_t\fR contains the following member:
67 size_t re_nsub number of parenthesized subexpressions
73 The type \fBsize_t\fR is defined as described in <\fBsys/types.h\fR>. See
77 The type \fBregoff_t\fR is defined as a signed integer type that can hold the
78 largest value that can be stored in either a type \fBoff_t\fR or type
79 \fBssize_t\fR. The structure type \fBregmatch_t\fR contains the following
84 regoff_t rm_so byte offset from start of string to start
86 regoff_t rm_eo byte offset from start of string of the
87 first character after the end of substring
93 Values for the \fIcflags\fR parameter to the \fBregcomp\fR function are as
98 \fB\fBREG_EXTENDED\fR\fR
101 use extended regular expressions
107 \fB\fBREG_ICASE\fR\fR
116 \fB\fBREG_NOSUB\fR\fR
119 report only success or fail in \fBregexec()\fR
125 \fB\fBREG_NEWLINE\fR\fR
128 change the handling of \fBNEWLINE\fR character
133 Values for the \fIeflags\fR parameter to the \fBregexec()\fR function are as
138 \fB\fBREG_NOTBOL\fR\fR
141 The circumflex character (^), when taken as a special character, does not match
142 the beginning of string.
148 \fB\fBREG_NOTEOL\fR\fR
151 The dollar sign ($), when taken as a special character, does not match the end
157 The following constants are defined as error return values:
161 \fB\fBREG_NOMATCH\fR\fR
164 \fBregexec()\fR failed to match.
170 \fB\fBREG_BADPAT\fR\fR
173 Invalid regular expression.
179 \fB\fBREG_ECOLLATE\fR\fR
182 Invalid collating element referenced.
188 \fB\fBREG_ECTYPE\fR\fR
191 Invalid character class type referenced.
197 \fB\fBREG_EESCAPE\fR\fR
200 Trailing '\e' in pattern.
206 \fB\fBREG_ESUBREG\fR\fR
209 Number in \fIdigit\fR invalid or in error.
215 \fB\fBREG_EBRACK\fR\fR
224 \fB\fBREG_EPAREN\fR\fR
227 "\e(\e)" or "()" imbalance.
233 \fB\fBREG_EBRACE\fR\fR
242 \fB\fBREG_BADBR\fR\fR
245 Content of "\{\}" invalid: not a number, number too large, more than two
246 numbers, first larger than second.
252 \fB\fBREG_ERANGE\fR\fR
255 Invalid endpoint in range expression.
261 \fB\fBREG_ESPACE\fR\fR
270 \fB\fBREG_BADRPT\fR\fR
273 \&'?', '*', or '+' not preceded by valid regular expression.
279 \fB\fBREG_ENOSYS\fR\fR
288 See \fBattributes\fR(5) for descriptions of the following attributes:
296 ATTRIBUTE TYPE ATTRIBUTE VALUE
298 Interface Stability Standard
304 \fBregcomp\fR(3C), \fBtypes.h\fR(3HEAD), \fBattributes\fR(5),