| /* dquote_static.c |
| * |
| * This file contains static functions that are related to |
| * parsing double-quotish expressions, but are used in more than |
| * one file. |
| * |
| * It is currently #included by regcomp.c and toke.c. |
| */ |
| |
| #define PERL_IN_DQUOTE_STATIC_C |
| #include "proto.h" |
| #include "embed.h" |
| |
| /* |
| - regcurly - a little FSA that accepts {\d+,?\d*} |
| Pulled from regcomp.c. |
| */ |
| PERL_STATIC_INLINE I32 |
| S_regcurly(pTHX_ register const char *s) |
| { |
| PERL_ARGS_ASSERT_REGCURLY; |
| |
| if (*s++ != '{') |
| return FALSE; |
| if (!isDIGIT(*s)) |
| return FALSE; |
| while (isDIGIT(*s)) |
| s++; |
| if (*s == ',') { |
| s++; |
| while (isDIGIT(*s)) |
| s++; |
| } |
| if (*s != '}') |
| return FALSE; |
| return TRUE; |
| } |
| |
| /* XXX Add documentation after final interface and behavior is decided */ |
| /* May want to show context for error, so would pass Perl_bslash_c(pTHX_ const char* current, const char* start, const bool output_warning) |
| U8 source = *current; |
| */ |
| |
| STATIC char |
| S_grok_bslash_c(pTHX_ const char source, const bool utf8, const bool output_warning) |
| { |
| |
| U8 result; |
| |
| if (utf8) { |
| /* Trying to deprecate non-ASCII usages. This construct has never |
| * worked for a utf8 variant. So, even though are accepting non-ASCII |
| * Latin1 in 5.14, no need to make them work under utf8 */ |
| if (! isASCII(source)) { |
| Perl_croak(aTHX_ "Character following \"\\c\" must be ASCII"); |
| } |
| } |
| |
| result = toCTRL(source); |
| if (! isASCII(source)) { |
| Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
| "Character following \"\\c\" must be ASCII"); |
| } |
| else if (! isCNTRL(result) && output_warning) { |
| if (source == '{') { |
| Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
| "\"\\c{\" is deprecated and is more clearly written as \";\""); |
| } |
| else { |
| U8 clearer[3]; |
| U8 i = 0; |
| if (! isALNUM(result)) { |
| clearer[i++] = '\\'; |
| } |
| clearer[i++] = result; |
| clearer[i++] = '\0'; |
| |
| Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), |
| "\"\\c%c\" is more clearly written simply as \"%s\"", |
| source, |
| clearer); |
| } |
| } |
| |
| return result; |
| } |
| |
| STATIC bool |
| S_grok_bslash_o(pTHX_ const char *s, |
| UV *uv, |
| STRLEN *len, |
| const char** error_msg, |
| const bool output_warning) |
| { |
| |
| /* Documentation to be supplied when interface nailed down finally |
| * This returns FALSE if there is an error which the caller need not recover |
| * from; , otherwise TRUE. In either case the caller should look at *len |
| * On input: |
| * s points to a string that begins with 'o', and the previous character |
| * was a backslash. |
| * uv points to a UV that will hold the output value, valid only if the |
| * return from the function is TRUE |
| * len on success will point to the next character in the string past the |
| * end of this construct. |
| * on failure, it will point to the failure |
| * error_msg is a pointer that will be set to an internal buffer giving an |
| * error message upon failure (the return is FALSE). Untouched if |
| * function succeeds |
| * output_warning says whether to output any warning messages, or suppress |
| * them |
| */ |
| const char* e; |
| STRLEN numbers_len; |
| I32 flags = PERL_SCAN_ALLOW_UNDERSCORES |
| | PERL_SCAN_DISALLOW_PREFIX |
| /* XXX Until the message is improved in grok_oct, handle errors |
| * ourselves */ |
| | PERL_SCAN_SILENT_ILLDIGIT; |
| |
| PERL_ARGS_ASSERT_GROK_BSLASH_O; |
| |
| |
| assert(*s == 'o'); |
| s++; |
| |
| if (*s != '{') { |
| *len = 1; /* Move past the o */ |
| *error_msg = "Missing braces on \\o{}"; |
| return FALSE; |
| } |
| |
| e = strchr(s, '}'); |
| if (!e) { |
| *len = 2; /* Move past the o{ */ |
| *error_msg = "Missing right brace on \\o{"; |
| return FALSE; |
| } |
| |
| /* Return past the '}' no matter what is inside the braces */ |
| *len = e - s + 2; /* 2 = 1 for the o + 1 for the '}' */ |
| |
| s++; /* Point to first digit */ |
| |
| numbers_len = e - s; |
| if (numbers_len == 0) { |
| *error_msg = "Number with no digits"; |
| return FALSE; |
| } |
| |
| *uv = NATIVE_TO_UNI(grok_oct(s, &numbers_len, &flags, NULL)); |
| /* Note that if has non-octal, will ignore everything starting with that up |
| * to the '}' */ |
| |
| if (output_warning && numbers_len != (STRLEN) (e - s)) { |
| Perl_ck_warner(aTHX_ packWARN(WARN_DIGIT), |
| /* diag_listed_as: Non-octal character '%c'. Resolved as "%s" */ |
| "Non-octal character '%c'. Resolved as \"\\o{%.*s}\"", |
| *(s + numbers_len), |
| (int) numbers_len, |
| s); |
| } |
| |
| return TRUE; |
| } |
| |
| /* |
| * Local variables: |
| * c-indentation-style: bsd |
| * c-basic-offset: 4 |
| * indent-tabs-mode: t |
| * End: |
| * |
| * ex: set ts=8 sts=4 sw=4 noet: |
| */ |