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04e98a4d AD |
1 | /* dquote_static.c |
2 | * | |
3efe3cb8 | 3 | * This file contains static functions that are related to |
04e98a4d AD |
4 | * parsing double-quotish expressions, but are used in more than |
5 | * one file. | |
6 | * | |
7 | * It is currently #included by regcomp.c and toke.c. | |
8 | */ | |
9 | ||
881ffab6 KW |
10 | #define PERL_IN_DQUOTE_STATIC_C |
11 | #include "proto.h" | |
12 | #include "embed.h" | |
13 | ||
04e98a4d AD |
14 | /* |
15 | - regcurly - a little FSA that accepts {\d+,?\d*} | |
16 | Pulled from regcomp.c. | |
17 | */ | |
04e98a4d | 18 | PERL_STATIC_INLINE I32 |
93df2d9c | 19 | S_regcurly(pTHX_ register const char *s) |
04e98a4d | 20 | { |
881ffab6 | 21 | PERL_ARGS_ASSERT_REGCURLY; |
04e98a4d AD |
22 | |
23 | if (*s++ != '{') | |
24 | return FALSE; | |
25 | if (!isDIGIT(*s)) | |
26 | return FALSE; | |
27 | while (isDIGIT(*s)) | |
28 | s++; | |
2ec31dd9 | 29 | if (*s == ',') { |
04e98a4d | 30 | s++; |
2ec31dd9 KW |
31 | while (isDIGIT(*s)) |
32 | s++; | |
33 | } | |
04e98a4d AD |
34 | if (*s != '}') |
35 | return FALSE; | |
36 | return TRUE; | |
37 | } | |
db30362b | 38 | |
68b355dd KW |
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) | |
41 | U8 source = *current; | |
68b355dd KW |
42 | */ |
43 | ||
44 | STATIC char | |
17a3df4c | 45 | S_grok_bslash_c(pTHX_ const char source, const bool utf8, const bool output_warning) |
68b355dd KW |
46 | { |
47 | ||
48 | U8 result; | |
49 | ||
17a3df4c KW |
50 | if (utf8) { |
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"); | |
56 | } | |
68b355dd KW |
57 | } |
58 | ||
59 | result = toCTRL(source); | |
17a3df4c KW |
60 | if (! isASCII(source)) { |
61 | Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), | |
62 | "Character following \"\\c\" must be ASCII"); | |
63 | } | |
64 | else if (! isCNTRL(result) && output_warning) { | |
68b355dd | 65 | if (source == '{') { |
17a3df4c KW |
66 | Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
67 | "\"\\c{\" is deprecated and is more clearly written as \";\""); | |
68b355dd | 68 | } |
17a3df4c | 69 | else { |
68b355dd KW |
70 | U8 clearer[3]; |
71 | U8 i = 0; | |
72 | if (! isALNUM(result)) { | |
73 | clearer[i++] = '\\'; | |
74 | } | |
75 | clearer[i++] = result; | |
76 | clearer[i++] = '\0'; | |
77 | ||
17a3df4c KW |
78 | Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), |
79 | "\"\\c%c\" is more clearly written simply as \"%s\"", | |
68b355dd KW |
80 | source, |
81 | clearer); | |
82 | } | |
83 | } | |
84 | ||
85 | return result; | |
86 | } | |
87 | ||
db30362b KW |
88 | STATIC bool |
89 | S_grok_bslash_o(pTHX_ const char *s, | |
90 | UV *uv, | |
91 | STRLEN *len, | |
92 | const char** error_msg, | |
93 | const bool output_warning) | |
94 | { | |
95 | ||
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 | |
99 | * On input: | |
100 | * s points to a string that begins with 'o', and the previous character | |
101 | * was a backslash. | |
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 | |
109 | * function succeeds | |
110 | * output_warning says whether to output any warning messages, or suppress | |
111 | * them | |
112 | */ | |
113 | const char* e; | |
114 | STRLEN numbers_len; | |
115 | I32 flags = PERL_SCAN_ALLOW_UNDERSCORES | |
116 | | PERL_SCAN_DISALLOW_PREFIX | |
117 | /* XXX Until the message is improved in grok_oct, handle errors | |
118 | * ourselves */ | |
119 | | PERL_SCAN_SILENT_ILLDIGIT; | |
120 | ||
121 | PERL_ARGS_ASSERT_GROK_BSLASH_O; | |
122 | ||
123 | ||
124 | assert(*s == 'o'); | |
125 | s++; | |
126 | ||
127 | if (*s != '{') { | |
128 | *len = 1; /* Move past the o */ | |
129 | *error_msg = "Missing braces on \\o{}"; | |
130 | return FALSE; | |
131 | } | |
132 | ||
133 | e = strchr(s, '}'); | |
134 | if (!e) { | |
135 | *len = 2; /* Move past the o{ */ | |
136 | *error_msg = "Missing right brace on \\o{"; | |
137 | return FALSE; | |
138 | } | |
139 | ||
140 | /* Return past the '}' no matter what is inside the braces */ | |
141 | *len = e - s + 2; /* 2 = 1 for the o + 1 for the '}' */ | |
142 | ||
143 | s++; /* Point to first digit */ | |
144 | ||
145 | numbers_len = e - s; | |
146 | if (numbers_len == 0) { | |
147 | *error_msg = "Number with no digits"; | |
148 | return FALSE; | |
149 | } | |
150 | ||
151 | *uv = NATIVE_TO_UNI(grok_oct(s, &numbers_len, &flags, NULL)); | |
152 | /* Note that if has non-octal, will ignore everything starting with that up | |
153 | * to the '}' */ | |
154 | ||
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}\"", | |
159 | *(s + numbers_len), | |
160 | (int) numbers_len, | |
161 | s); | |
162 | } | |
163 | ||
164 | return TRUE; | |
165 | } | |
166 | ||
04e98a4d AD |
167 | /* |
168 | * Local variables: | |
169 | * c-indentation-style: bsd | |
170 | * c-basic-offset: 4 | |
171 | * indent-tabs-mode: t | |
172 | * End: | |
173 | * | |
174 | * ex: set ts=8 sts=4 sw=4 noet: | |
175 | */ |