return *s == '}';
}
-PERL_STATIC_INLINE bool
-S_grok_bslash_x(pTHX_ char **s, UV *uv, const char** error_msg,
- const bool output_warning, const bool strict,
- const bool silence_non_portable,
- const bool UTF)
+/* This is inline not for speed, but because it is so tiny */
+
+PERL_STATIC_INLINE char*
+S_form_short_octal_warning(pTHX_
+ const char * const s, /* Points to first non-octal */
+ const STRLEN len /* Length of octals string, so
+ (s-len) points to first
+ octal */
+)
{
+ /* Return a character string consisting of a warning message for when a
+ * string constant in octal is weird, like "\078". */
-/* 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.
- * It guarantees that the returned codepoint, *uv, when expressed as
- * utf8 bytes, would fit within the skipped "\x{...}" bytes.
- *
- * On input:
- * s is the address of a pointer to a NULL terminated string that begins
- * with 'x', and the previous character was a backslash. At exit, *s
- * will be advanced to the byte just after those absorbed by this
- * function. Hence the caller can continue parsing from there. In
- * the case of an error, this routine has generally positioned *s to
- * point just to the right of the first bad spot, so that a message
- * that has a "<--" to mark the spot will be correctly positioned.
- * uv points to a UV that will hold the output value, valid only if the
- * return from the function is TRUE
- * 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
- * strict is true if anything out of the ordinary should cause this to
- * fail instead of warn or be silent. For example, it requires
- * exactly 2 digits following the \x (when there are no braces).
- * 3 digits could be a mistake, so is forbidden in this mode.
- * silence_non_portable is true if to suppress warnings about the code
- * point returned being too large to fit on all platforms.
- * UTF is true iff the string *s is encoded in UTF-8.
- */
- char* e;
- STRLEN numbers_len;
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
-#ifdef DEBUGGING
- char *start = *s - 1;
- assert(*start == '\\');
-#endif
-
- PERL_ARGS_ASSERT_GROK_BSLASH_X;
+ const char * sans_leading_zeros = s - len;
- assert(**s == 'x');
- (*s)++;
-
- if (strict || ! output_warning) {
- flags |= PERL_SCAN_SILENT_ILLDIGIT;
- }
+ PERL_ARGS_ASSERT_FORM_SHORT_OCTAL_WARNING;
- if (**s != '{') {
- STRLEN len = (strict) ? 3 : 2;
+ assert(*s == '8' || *s == '9');
- *uv = grok_hex(*s, &len, &flags, NULL);
- *s += len;
- if (strict && len != 2) {
- if (len < 2) {
- *s += (UTF) ? UTF8SKIP(*s) : 1;
- *error_msg = "Non-hex character";
- }
- else {
- *error_msg = "Use \\x{...} for more than two hex characters";
- }
- return FALSE;
- }
- goto ok;
+ /* Remove the leading zeros, retaining one zero so won't be zero length */
+ while (*sans_leading_zeros == '0') sans_leading_zeros++;
+ if (sans_leading_zeros == s) {
+ sans_leading_zeros--;
}
- e = strchr(*s, '}');
- if (!e) {
- (*s)++; /* Move past the '{' */
- while (isXDIGIT(**s)) { /* Position beyond the legal digits */
- (*s)++;
- }
- /* XXX The corresponding message above for \o is just '\\o{'; other
- * messages for other constructs include the '}', so are inconsistent.
- */
- *error_msg = "Missing right brace on \\x{}";
- return FALSE;
- }
-
- (*s)++; /* Point to expected first digit (could be first byte of utf8
- sequence if not a digit) */
- numbers_len = e - *s;
- if (numbers_len == 0) {
- if (strict) {
- (*s)++; /* Move past the } */
- *error_msg = "Number with no digits";
- return FALSE;
- }
- *s = e + 1;
- *uv = 0;
- goto ok;
- }
-
- flags |= PERL_SCAN_ALLOW_UNDERSCORES;
- if (silence_non_portable) {
- flags |= PERL_SCAN_SILENT_NON_PORTABLE;
- }
-
- *uv = grok_hex(*s, &numbers_len, &flags, NULL);
- /* Note that if has non-hex, will ignore everything starting with that up
- * to the '}' */
-
- if (strict && numbers_len != (STRLEN) (e - *s)) {
- *s += numbers_len;
- *s += (UTF) ? UTF8SKIP(*s) : 1;
- *error_msg = "Non-hex character";
- return FALSE;
- }
-
- /* Return past the '}' */
- *s = e + 1;
-
- ok:
- /* guarantee replacing "\x{...}" with utf8 bytes fits within
- * existing space */
- assert(UVCHR_SKIP(*uv) < *s - start);
- return TRUE;
+ return Perl_form(aTHX_
+ "'%.*s' resolved to '\\o{%.*s}%c'",
+ (int) (len + 2), s - len - 1,
+ (int) (s - sans_leading_zeros), sans_leading_zeros,
+ *s);
}
-
#endif /* DQUOTE_INLINE_H */
https://perl5.git.perl.org / perl5.git / blobdiff