3 * This file contains static functions that are related to
4 * parsing double-quotish expressions, but are used in more than
7 * It is currently #included by regcomp.c and toke.c.
10 #define PERL_IN_DQUOTE_STATIC_C
15 - regcurly - a little FSA that accepts {\d+,?\d*}
16 Pulled from regcomp.c.
18 PERL_STATIC_INLINE I32
19 S_regcurly(pTHX_ register const char *s)
21 PERL_ARGS_ASSERT_REGCURLY;
39 /* XXX Add documentation after final interface and behavior is decided */
40 /* May want to show context for error, so would pass Perl_bslash_c(pTHX_ const char* current, const char* start, const bool output_warning)
45 S_grok_bslash_c(pTHX_ const char source, const bool utf8, const bool output_warning)
51 /* Trying to deprecate non-ASCII usages. This construct has never
52 * worked for a utf8 variant. So, even though are accepting non-ASCII
53 * Latin1 in 5.14, no need to make them work under utf8 */
54 if (! isASCII(source)) {
55 Perl_croak(aTHX_ "Character following \"\\c\" must be ASCII");
59 result = toCTRL(source);
60 if (! isASCII(source)) {
61 Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
62 "Character following \"\\c\" must be ASCII");
64 else if (! isCNTRL(result) && output_warning) {
66 Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
67 "\"\\c{\" is deprecated and is more clearly written as \";\"");
72 if (! isALNUM(result)) {
75 clearer[i++] = result;
78 Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX),
79 "\"\\c%c\" is more clearly written simply as \"%s\"",
89 S_grok_bslash_o(pTHX_ const char *s,
92 const char** error_msg,
93 const bool output_warning)
96 /* Documentation to be supplied when interface nailed down finally
97 * This returns FALSE if there is an error which the caller need not recover
98 * from; , otherwise TRUE. In either case the caller should look at *len
100 * s points to a string that begins with 'o', and the previous character
102 * uv points to a UV that will hold the output value, valid only if the
103 * return from the function is TRUE
104 * len on success will point to the next character in the string past the
105 * end of this construct.
106 * on failure, it will point to the failure
107 * error_msg is a pointer that will be set to an internal buffer giving an
108 * error message upon failure (the return is FALSE). Untouched if
110 * output_warning says whether to output any warning messages, or suppress
115 I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
116 | PERL_SCAN_DISALLOW_PREFIX
117 /* XXX Until the message is improved in grok_oct, handle errors
119 | PERL_SCAN_SILENT_ILLDIGIT;
121 PERL_ARGS_ASSERT_GROK_BSLASH_O;
128 *len = 1; /* Move past the o */
129 *error_msg = "Missing braces on \\o{}";
135 *len = 2; /* Move past the o{ */
136 *error_msg = "Missing right brace on \\o{";
140 /* Return past the '}' no matter what is inside the braces */
141 *len = e - s + 2; /* 2 = 1 for the 'o' + 1 for the '}' */
143 s++; /* Point to first digit */
146 if (numbers_len == 0) {
147 *error_msg = "Number with no digits";
151 *uv = grok_oct(s, &numbers_len, &flags, NULL);
152 /* Note that if has non-octal, will ignore everything starting with that up
155 if (output_warning && numbers_len != (STRLEN) (e - s)) {
156 Perl_ck_warner(aTHX_ packWARN(WARN_DIGIT),
157 /* diag_listed_as: Non-octal character '%c'. Resolved as "%s" */
158 "Non-octal character '%c'. Resolved as \"\\o{%.*s}\"",
167 PERL_STATIC_INLINE bool
168 S_grok_bslash_x(pTHX_ const char *s,
171 const char** error_msg,
172 const bool output_warning)
175 /* Documentation to be supplied when interface nailed down finally
176 * This returns FALSE if there is an error which the caller need not recover
177 * from; , otherwise TRUE. In either case the caller should look at *len
179 * s points to a string that begins with 'x', and the previous character
181 * uv points to a UV that will hold the output value, valid only if the
182 * return from the function is TRUE
183 * len on success will point to the next character in the string past the
184 * end of this construct.
185 * on failure, it will point to the failure
186 * error_msg is a pointer that will be set to an internal buffer giving an
187 * error message upon failure (the return is FALSE). Untouched if
189 * output_warning says whether to output any warning messages, or suppress
194 I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
195 | PERL_SCAN_DISALLOW_PREFIX;
197 PERL_ARGS_ASSERT_GROK_BSLASH_X;
199 PERL_UNUSED_ARG(output_warning);
205 I32 flags = PERL_SCAN_DISALLOW_PREFIX;
207 *uv = grok_hex(s, len, &flags, NULL);
214 *len = 2; /* Move past the 'x{' */
215 /* XXX The corresponding message above for \o is just '\\o{'; other
216 * messages for other constructs include the '}', so are inconsistent.
218 *error_msg = "Missing right brace on \\x{}";
222 /* Return past the '}' no matter what is inside the braces */
223 *len = e - s + 2; /* 2 = 1 for the 'x' + 1 for the '}' */
225 s++; /* Point to first digit */
228 *uv = grok_hex(s, &numbers_len, &flags, NULL);
229 /* Note that if has non-hex, will ignore everything starting with that up
237 * c-indentation-style: bsd
239 * indent-tabs-mode: nil
242 * ex: set ts=8 sts=4 sw=4 et: