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Fix re unescaping

This commit is contained in:
Scott Shawcroft 2023-10-05 13:35:07 -07:00
parent 49511b0746
commit 85650bf1ab
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GPG Key ID: 0DFD512649C052DA
2 changed files with 32 additions and 6 deletions
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4
extmod/modure.c
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@ -444,7 +444,11 @@ STATIC MP_DEFINE_CONST_DICT(re_locals_dict, re_locals_dict_table);
STATIC MP_DEFINE_CONST_OBJ_TYPE(
re_type,
#if CIRCUITPY
MP_QSTR_re,
#else
MP_QSTR_ure,
#endif
MP_TYPE_FLAG_NONE,
print, re_print,
locals_dict, &re_locals_dict

34
lib/re1.5/compilecode.c
View File

@ -14,6 +14,27 @@
#define EMIT_CHECKED(at, byte) (_emit_checked(at, code, byte, &err))
#define PC (prog->bytelen)
static char unescape(char c) {
switch (c) {
case 'a':
return '\a';
case 'b':
return '\b';
case 'f':
return '\f';
case 'n':
return '\n';
case 'r':
return '\r';
case 't':
return '\t';
case 'v':
return '\v';
default:
return c;
}
}
static void _emit_checked(int at, char *code, int val, bool *err) {
*err |= val != (int8_t)val;
if (code) {
@ -34,14 +55,16 @@ static const char *_compilecode(const char *re, ByteProg *prog, int sizecode)
case '\\':
re++;
if (!*re) return NULL; // Trailing backslash
term = PC;
if (MATCH_NAMED_CLASS_CHAR(*re)) {
term = PC;
EMIT(PC++, NamedClass);
EMIT(PC++, *re);
prog->len++;
break;
} else {
EMIT(PC++, Char);
EMIT(PC++, unescape(*re));
}
MP_FALLTHROUGH
prog->len++;
break;
default:
term = PC;
EMIT(PC++, Char);
@ -74,7 +97,7 @@ static const char *_compilecode(const char *re, ByteProg *prog, int sizecode)
c = RE15_CLASS_NAMED_CLASS_INDICATOR;
goto emit_char_pair;
} else {
// CIRCUITPY TODO: handle unescape here again PR #1544
c = unescape(c);
}
}
if (!c) return NULL;
@ -84,7 +107,6 @@ static const char *_compilecode(const char *re, ByteProg *prog, int sizecode)
emit_char_pair:
EMIT(PC++, c);
EMIT(PC++, *re);
// CIRCUITPY TODO handle unescape here again PR #1544
}
EMIT_CHECKED(term + 1, cnt);
break;