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sub |
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code |
1
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/* dquote_static.c |
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* |
3
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* This file contains static functions that are related to |
4
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* parsing double-quotish expressions, but are used in more than |
5
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* one file. |
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* |
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* It is currently #included by regcomp.c and toke.c. |
8
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*/ |
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10
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#define PERL_IN_DQUOTE_STATIC_C |
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#include "embed.h" |
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13
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/* |
14
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- regcurly - a little FSA that accepts {\d+,?\d*} |
15
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Pulled from regcomp.c. |
16
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*/ |
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PERL_STATIC_INLINE I32 |
18
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8044
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S_regcurly(pTHX_ const char *s, |
19
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const bool rbrace_must_be_escaped /* Should the terminating '} be |
20
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preceded by a backslash? This |
21
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is an abnormal case */ |
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) |
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{ |
24
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8044
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PERL_ARGS_ASSERT_REGCURLY; |
25
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26
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8044
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if (*s++ != '{') |
27
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return FALSE; |
28
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6053
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if (!isDIGIT(*s)) |
29
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return FALSE; |
30
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3027
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while (isDIGIT(*s)) |
31
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3026
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s++; |
32
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3018
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if (*s == ',') { |
33
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6038
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s++; |
34
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2
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while (isDIGIT(*s)) |
35
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3026
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s++; |
36
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} |
37
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38
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8
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return (rbrace_must_be_escaped) |
39
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6052
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? *s == '\\' && *(s+1) == '}' |
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114812
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: *s == '}'; |
41
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} |
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43
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/* XXX Add documentation after final interface and behavior is decided */ |
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/* May want to show context for error, so would pass Perl_bslash_c(pTHX_ const char* current, const char* start, const bool output_warning) |
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U8 source = *current; |
46
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*/ |
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48
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STATIC char |
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114812
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S_grok_bslash_c(pTHX_ const char source, const bool utf8, const bool output_warning) |
50
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{ |
51
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52
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U8 result; |
53
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54
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35
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if (utf8) { |
55
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/* Trying to deprecate non-ASCII usages. This construct has never |
56
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* worked for a utf8 variant. So, even though are accepting non-ASCII |
57
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* Latin1 in 5.14, no need to make them work under utf8 */ |
58
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0
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if (! isASCII(source)) { |
59
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114812
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Perl_croak(aTHX_ "Character following \"\\c\" must be ASCII"); |
60
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} |
61
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} |
62
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63
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114812
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result = toCTRL(source); |
64
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0
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if (! isASCII(source)) { |
65
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114812
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Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
66
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"Character following \"\\c\" must be ASCII"); |
67
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} |
68
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10
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else if (! isCNTRL(result) && output_warning) { |
69
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4
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if (source == '{') { |
70
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6
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Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
71
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"\"\\c{\" is deprecated and is more clearly written as \";\""); |
72
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} |
73
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else { |
74
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U8 clearer[3]; |
75
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U8 i = 0; |
76
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4
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if (! isWORDCHAR(result)) { |
77
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6
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clearer[i++] = '\\'; |
78
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} |
79
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6
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clearer[i++] = result; |
80
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6
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clearer[i++] = '\0'; |
81
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82
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114808
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Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), |
83
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"\"\\c%c\" is more clearly written simply as \"%s\"", |
84
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source, |
85
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clearer); |
86
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} |
87
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} |
88
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89
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32
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return result; |
90
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} |
91
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92
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STATIC bool |
93
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32
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S_grok_bslash_o(pTHX_ char **s, UV *uv, const char** error_msg, |
94
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const bool output_warning, const bool strict, |
95
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const bool silence_non_portable, |
96
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const bool UTF) |
97
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{ |
98
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99
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/* Documentation to be supplied when interface nailed down finally |
100
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* This returns FALSE if there is an error which the caller need not recover |
101
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* from; , otherwise TRUE. In either case the caller should look at *len |
102
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* On input: |
103
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* s is the address of a pointer to a NULL terminated string that begins |
104
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* with 'o', and the previous character was a backslash. At exit, *s |
105
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* will be advanced to the byte just after those absorbed by this |
106
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* function. Hence the caller can continue parsing from there. In |
107
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* the case of an error, this routine has generally positioned *s to |
108
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* point just to the right of the first bad spot, so that a message |
109
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* that has a "<--" to mark the spot will be correctly positioned. |
110
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* uv points to a UV that will hold the output value, valid only if the |
111
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* return from the function is TRUE |
112
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* error_msg is a pointer that will be set to an internal buffer giving an |
113
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* error message upon failure (the return is FALSE). Untouched if |
114
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* function succeeds |
115
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* output_warning says whether to output any warning messages, or suppress |
116
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* them |
117
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* strict is true if this should fail instead of warn if there are |
118
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* non-octal digits within the braces |
119
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* silence_non_portable is true if to suppress warnings about the code |
120
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* point returned being too large to fit on all platforms. |
121
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* UTF is true iff the string *s is encoded in UTF-8. |
122
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|
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*/ |
123
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char* e; |
124
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|
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STRLEN numbers_len; |
125
|
32
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|
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I32 flags = PERL_SCAN_ALLOW_UNDERSCORES |
126
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|
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| PERL_SCAN_DISALLOW_PREFIX |
127
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|
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/* XXX Until the message is improved in grok_oct, handle errors |
128
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|
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* ourselves */ |
129
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|
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| PERL_SCAN_SILENT_ILLDIGIT; |
130
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|
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|
|
131
|
32
|
|
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PERL_ARGS_ASSERT_GROK_BSLASH_O; |
132
|
|
|
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|
|
|
133
|
|
|
|
|
|
|
134
|
22
|
|
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assert(**s == 'o'); |
135
|
22
|
|
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(*s)++; |
136
|
|
|
|
|
|
|
137
|
10
|
|
|
|
|
if (**s != '{') { |
138
|
10
|
|
|
|
|
*error_msg = "Missing braces on \\o{}"; |
139
|
2
|
|
|
|
|
return FALSE; |
140
|
|
|
|
|
|
} |
141
|
|
|
|
|
|
|
142
|
4
|
|
|
|
|
e = strchr(*s, '}'); |
143
|
0
|
|
|
|
|
if (!e) { |
144
|
2
|
|
|
|
|
(*s)++; /* Move past the '{' */ |
145
|
2
|
|
|
|
|
while (isOCTAL(**s)) { /* Position beyond the legal digits */ |
146
|
8
|
|
|
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(*s)++; |
147
|
|
|
|
|
|
} |
148
|
8
|
|
|
|
|
*error_msg = "Missing right brace on \\o{"; |
149
|
8
|
|
|
|
|
return FALSE; |
150
|
|
|
|
|
|
} |
151
|
|
|
|
|
|
|
152
|
1
|
|
|
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|
(*s)++; /* Point to expected first digit (could be first byte of utf8 |
153
|
|
|
|
|
|
sequence if not a digit) */ |
154
|
1
|
|
|
|
|
numbers_len = e - *s; |
155
|
1
|
|
|
|
|
if (numbers_len == 0) { |
156
|
7
|
|
|
|
|
(*s)++; /* Move past the } */ |
157
|
7
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|
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|
|
*error_msg = "Number with no digits"; |
158
|
7
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|
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|
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return FALSE; |
159
|
|
|
|
|
|
} |
160
|
|
|
|
|
|
|
161
|
7
|
|
|
|
|
if (silence_non_portable) { |
162
|
4
|
|
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|
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flags |= PERL_SCAN_SILENT_NON_PORTABLE; |
163
|
|
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|
|
|
} |
164
|
|
|
|
|
|
|
165
|
0
|
|
|
|
|
*uv = grok_oct(*s, &numbers_len, &flags, NULL); |
166
|
|
|
|
|
|
/* Note that if has non-octal, will ignore everything starting with that up |
167
|
|
|
|
|
|
* to the '}' */ |
168
|
|
|
|
|
|
|
169
|
0
|
|
|
|
|
if (numbers_len != (STRLEN) (e - *s)) { |
170
|
0
|
|
|
|
|
if (strict) { |
171
|
0
|
|
|
|
|
*s += numbers_len; |
172
|
4
|
|
|
|
|
*s += (UTF) ? UTF8SKIP(*s) : (STRLEN) 1; |
173
|
8
|
|
|
|
|
*error_msg = "Non-octal character"; |
174
|
4
|
|
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|
|
return FALSE; |
175
|
|
|
|
|
|
} |
176
|
5
|
|
|
|
|
else if (output_warning) { |
177
|
5
|
|
|
|
|
Perl_ck_warner(aTHX_ packWARN(WARN_DIGIT), |
178
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|
|
|
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|
/* diag_listed_as: Non-octal character '%c'. Resolved as "%s" */ |
179
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|
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|
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|
"Non-octal character '%c'. Resolved as \"\\o{%.*s}\"", |
180
|
15920694
|
|
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*(*s + numbers_len), |
181
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|
|
|
|
|
(int) numbers_len, |
182
|
|
|
|
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|
*s); |
183
|
|
|
|
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|
} |
184
|
|
|
|
|
|
} |
185
|
|
|
|
|
|
|
186
|
|
|
|
|
|
/* Return past the '}' */ |
187
|
15920694
|
|
|
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*s = e + 1; |
188
|
|
|
|
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|
189
|
15920694
|
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return TRUE; |
190
|
|
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|
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|
} |
191
|
|
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|
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|
|
192
|
|
|
|
|
|
PERL_STATIC_INLINE bool |
193
|
15735754
|
|
|
|
|
S_grok_bslash_x(pTHX_ char **s, UV *uv, const char** error_msg, |
194
|
|
|
|
|
|
const bool output_warning, const bool strict, |
195
|
|
|
|
|
|
const bool silence_non_portable, |
196
|
|
|
|
|
|
const bool UTF) |
197
|
|
|
|
|
|
{ |
198
|
|
|
|
|
|
|
199
|
|
|
|
|
|
/* Documentation to be supplied when interface nailed down finally |
200
|
|
|
|
|
|
* This returns FALSE if there is an error which the caller need not recover |
201
|
|
|
|
|
|
* from; , otherwise TRUE. In either case the caller should look at *len |
202
|
|
|
|
|
|
* On input: |
203
|
|
|
|
|
|
* s is the address of a pointer to a NULL terminated string that begins |
204
|
|
|
|
|
|
* with 'x', and the previous character was a backslash. At exit, *s |
205
|
|
|
|
|
|
* will be advanced to the byte just after those absorbed by this |
206
|
|
|
|
|
|
* function. Hence the caller can continue parsing from there. In |
207
|
|
|
|
|
|
* the case of an error, this routine has generally positioned *s to |
208
|
|
|
|
|
|
* point just to the right of the first bad spot, so that a message |
209
|
|
|
|
|
|
* that has a "<--" to mark the spot will be correctly positioned. |
210
|
|
|
|
|
|
* uv points to a UV that will hold the output value, valid only if the |
211
|
|
|
|
|
|
* return from the function is TRUE |
212
|
|
|
|
|
|
* error_msg is a pointer that will be set to an internal buffer giving an |
213
|
|
|
|
|
|
* error message upon failure (the return is FALSE). Untouched if |
214
|
|
|
|
|
|
* function succeeds |
215
|
|
|
|
|
|
* output_warning says whether to output any warning messages, or suppress |
216
|
|
|
|
|
|
* them |
217
|
|
|
|
|
|
* strict is true if anything out of the ordinary should cause this to |
218
|
|
|
|
|
|
* fail instead of warn or be silent. For example, it requires |
219
|
|
|
|
|
|
* exactly 2 digits following the \x (when there are no braces). |
220
|
|
|
|
|
|
* 3 digits could be a mistake, so is forbidden in this mode. |
221
|
|
|
|
|
|
* silence_non_portable is true if to suppress warnings about the code |
222
|
|
|
|
|
|
* point returned being too large to fit on all platforms. |
223
|
|
|
|
|
|
* UTF is true iff the string *s is encoded in UTF-8. |
224
|
|
|
|
|
|
*/ |
225
|
|
|
|
|
|
char* e; |
226
|
|
|
|
|
|
STRLEN numbers_len; |
227
|
15735754
|
|
|
|
|
I32 flags = PERL_SCAN_DISALLOW_PREFIX; |
228
|
|
|
|
|
|
|
229
|
15735754
|
|
|
|
|
PERL_ARGS_ASSERT_GROK_BSLASH_X; |
230
|
|
|
|
|
|
|
231
|
|
|
|
|
|
PERL_UNUSED_ARG(output_warning); |
232
|
|
|
|
|
|
|
233
|
185060
|
|
|
|
|
assert(**s == 'x'); |
234
|
185060
|
|
|
|
|
(*s)++; |
235
|
|
|
|
|
|
|
236
|
81
|
|
|
|
|
if (strict) { |
237
|
21
|
|
|
|
|
flags |= PERL_SCAN_SILENT_ILLDIGIT; |
238
|
|
|
|
|
|
} |
239
|
|
|
|
|
|
|
240
|
60
|
|
|
|
|
if (**s != '{') { |
241
|
184979
|
|
|
|
|
STRLEN len = (strict) ? 3 : 2; |
242
|
|
|
|
|
|
|
243
|
184979
|
|
|
|
|
*uv = grok_hex(*s, &len, &flags, NULL); |
244
|
184979
|
|
|
|
|
*s += len; |
245
|
184979
|
|
|
|
|
if (strict && len != 2) { |
246
|
184979
|
|
|
|
|
if (len < 2) { |
247
|
184979
|
|
|
|
|
*s += (UTF) ? UTF8SKIP(*s) : 1; |
248
|
184979
|
|
|
|
|
*error_msg = "Non-hex character"; |
249
|
|
|
|
|
|
} |
250
|
|
|
|
|
|
else { |
251
|
0
|
|
|
|
|
*error_msg = "Use \\x{...} for more than two hex characters"; |
252
|
|
|
|
|
|
} |
253
|
|
|
|
|
|
return FALSE; |
254
|
|
|
|
|
|
} |
255
|
|
|
|
|
|
return TRUE; |
256
|
|
|
|
|
|
} |
257
|
|
|
|
|
|
|
258
|
60
|
|
|
|
|
e = strchr(*s, '}'); |
259
|
60
|
|
|
|
|
if (!e) { |
260
|
0
|
|
|
|
|
(*s)++; /* Move past the '{' */ |
261
|
0
|
|
|
|
|
while (isXDIGIT(**s)) { /* Position beyond the legal digits */ |
262
|
0
|
|
|
|
|
(*s)++; |
263
|
|
|
|
|
|
} |
264
|
|
|
|
|
|
/* XXX The corresponding message above for \o is just '\\o{'; other |
265
|
|
|
|
|
|
* messages for other constructs include the '}', so are inconsistent. |
266
|
|
|
|
|
|
*/ |
267
|
0
|
|
|
|
|
*error_msg = "Missing right brace on \\x{}"; |
268
|
0
|
|
|
|
|
return FALSE; |
269
|
|
|
|
|
|
} |
270
|
|
|
|
|
|
|
271
|
60
|
|
|
|
|
(*s)++; /* Point to expected first digit (could be first byte of utf8 |
272
|
|
|
|
|
|
sequence if not a digit) */ |
273
|
60
|
|
|
|
|
numbers_len = e - *s; |
274
|
60
|
|
|
|
|
if (numbers_len == 0) { |
275
|
0
|
|
|
|
|
if (strict) { |
276
|
0
|
|
|
|
|
(*s)++; /* Move past the } */ |
277
|
0
|
|
|
|
|
*error_msg = "Number with no digits"; |
278
|
0
|
|
|
|
|
return FALSE; |
279
|
|
|
|
|
|
} |
280
|
|
|
|
|
|
return TRUE; |
281
|
|
|
|
|
|
} |
282
|
|
|
|
|
|
|
283
|
60
|
|
|
|
|
flags |= PERL_SCAN_ALLOW_UNDERSCORES; |
284
|
60
|
|
|
|
|
if (silence_non_portable) { |
285
|
60
|
|
|
|
|
flags |= PERL_SCAN_SILENT_NON_PORTABLE; |
286
|
|
|
|
|
|
} |
287
|
|
|
|
|
|
|
288
|
60
|
|
|
|
|
*uv = grok_hex(*s, &numbers_len, &flags, NULL); |
289
|
|
|
|
|
|
/* Note that if has non-hex, will ignore everything starting with that up |
290
|
|
|
|
|
|
* to the '}' */ |
291
|
|
|
|
|
|
|
292
|
60
|
|
|
|
|
if (strict && numbers_len != (STRLEN) (e - *s)) { |
293
|
0
|
|
|
|
|
*s += numbers_len; |
294
|
0
|
|
|
|
|
*s += (UTF) ? UTF8SKIP(*s) : 1; |
295
|
0
|
|
|
|
|
*error_msg = "Non-hex character"; |
296
|
0
|
|
|
|
|
return FALSE; |
297
|
|
|
|
|
|
} |
298
|
|
|
|
|
|
|
299
|
|
|
|
|
|
/* Return past the '}' */ |
300
|
60
|
|
|
|
|
*s = e + 1; |
301
|
|
|
|
|
|
|
302
|
60
|
|
|
|
|
return TRUE; |
303
|
|
|
|
|
|
} |
304
|
|
|
|
|
|
|
305
|
|
|
|
|
|
STATIC char* |
306
|
0
|
|
|
|
|
S_form_short_octal_warning(pTHX_ |
307
|
|
|
|
|
|
const char * const s, /* Points to first non-octal */ |
308
|
|
|
|
|
|
const STRLEN len /* Length of octals string, so |
309
|
|
|
|
|
|
(s-len) points to first |
310
|
|
|
|
|
|
octal */ |
311
|
|
|
|
|
|
) { |
312
|
|
|
|
|
|
/* Return a character string consisting of a warning message for when a |
313
|
|
|
|
|
|
* string constant in octal is weird, like "\078". */ |
314
|
|
|
|
|
|
|
315
|
0
|
|
|
|
|
const char * sans_leading_zeros = s - len; |
316
|
|
|
|
|
|
|
317
|
0
|
|
|
|
|
PERL_ARGS_ASSERT_FORM_SHORT_OCTAL_WARNING; |
318
|
|
|
|
|
|
|
319
|
0
|
|
|
|
|
assert(*s == '8' || *s == '9'); |
320
|
|
|
|
|
|
|
321
|
|
|
|
|
|
/* Remove the leading zeros, retaining one zero so won't be zero length */ |
322
|
0
|
|
|
|
|
while (*sans_leading_zeros == '0') sans_leading_zeros++; |
323
|
0
|
|
|
|
|
if (sans_leading_zeros == s) { |
324
|
0
|
|
|
|
|
sans_leading_zeros--; |
325
|
|
|
|
|
|
} |
326
|
|
|
|
|
|
|
327
|
0
|
|
|
|
|
return Perl_form(aTHX_ |
328
|
|
|
|
|
|
"'%.*s' resolved to '\\o{%.*s}%c'", |
329
|
0
|
|
|
|
|
(int) (len + 2), s - len - 1, |
330
|
0
|
|
|
|
|
(int) (s - sans_leading_zeros), sans_leading_zeros, |
331
|
0
|
|
|
|
|
*s); |
332
|
|
|
|
|
|
} |
333
|
|
|
|
|
|
|
334
|
|
|
|
|
|
/* |
335
|
|
|
|
|
|
* Local variables: |
336
|
|
|
|
|
|
* c-indentation-style: bsd |
337
|
|
|
|
|
|
* c-basic-offset: 4 |
338
|
|
|
|
|
|
* indent-tabs-mode: nil |
339
|
|
|
|
|
|
* End: |
340
|
|
|
|
|
|
* |
341
|
|
|
|
|
|
* ex: set ts=8 sts=4 sw=4 et: |
342
|
|
|
|
|
|
*/ |