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/* dquote_static.c
*
* This file contains static inline 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;
}
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:
*/
|
