| 1 | /* dquote_inline.h |
| 2 | * |
| 3 | * Copyright (C) 2015 by Larry Wall and others |
| 4 | * |
| 5 | * You may distribute under the terms of either the GNU General Public |
| 6 | * License or the Artistic License, as specified in the README file. |
| 7 | */ |
| 8 | |
| 9 | #ifndef PERL_DQUOTE_INLINE_H_ /* Guard against nested #inclusion */ |
| 10 | #define PERL_DQUOTE_INLINE_H_ |
| 11 | |
| 12 | /* |
| 13 | - regcurly - a little FSA that accepts {\d+,?\d*} |
| 14 | Pulled from reg.c. |
| 15 | */ |
| 16 | PERL_STATIC_INLINE I32 |
| 17 | S_regcurly(const char *s) |
| 18 | { |
| 19 | PERL_ARGS_ASSERT_REGCURLY; |
| 20 | |
| 21 | if (*s++ != '{') |
| 22 | return FALSE; |
| 23 | if (!isDIGIT(*s)) |
| 24 | return FALSE; |
| 25 | while (isDIGIT(*s)) |
| 26 | s++; |
| 27 | if (*s == ',') { |
| 28 | s++; |
| 29 | while (isDIGIT(*s)) |
| 30 | s++; |
| 31 | } |
| 32 | |
| 33 | return *s == '}'; |
| 34 | } |
| 35 | |
| 36 | /* This is inline not for speed, but because it is so tiny */ |
| 37 | |
| 38 | PERL_STATIC_INLINE char* |
| 39 | S_form_short_octal_warning(pTHX_ |
| 40 | const char * const s, /* Points to first non-octal */ |
| 41 | const STRLEN len /* Length of octals string, so |
| 42 | (s-len) points to first |
| 43 | octal */ |
| 44 | ) |
| 45 | { |
| 46 | /* Return a character string consisting of a warning message for when a |
| 47 | * string constant in octal is weird, like "\078". */ |
| 48 | |
| 49 | const char * sans_leading_zeros = s - len; |
| 50 | |
| 51 | PERL_ARGS_ASSERT_FORM_SHORT_OCTAL_WARNING; |
| 52 | |
| 53 | assert(*s == '8' || *s == '9'); |
| 54 | |
| 55 | /* Remove the leading zeros, retaining one zero so won't be zero length */ |
| 56 | while (*sans_leading_zeros == '0') sans_leading_zeros++; |
| 57 | if (sans_leading_zeros == s) { |
| 58 | sans_leading_zeros--; |
| 59 | } |
| 60 | |
| 61 | return Perl_form(aTHX_ |
| 62 | "'%.*s' resolved to '\\o{%.*s}%c'", |
| 63 | (int) (len + 2), s - len - 1, |
| 64 | (int) (s - sans_leading_zeros), sans_leading_zeros, |
| 65 | *s); |
| 66 | } |
| 67 | #endif /* PERL_DQUOTE_INLINE_H_ */ |