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evaluator: escape sequences in strings (fix for ticket #145)

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git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@979 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
This commit is contained in:
michael
2009-01-26 05:18:07 +00:00
parent 8402d701a9
commit 2b538e055a
1 changed files with 57 additions and 5 deletions
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evaluator.c
+57 -5
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@@ -591,13 +591,65 @@ static void Parse(void)
/* strings */
else if (*ExprPtr == '\'') {
char *start = ++ExprPtr;
while (*ExprPtr != '\0' && *ExprPtr != '\'')
ExprPtr++;
Word = strndup(start, ExprPtr - start);
size_t length = 0;
size_t size = CHUNK_SIZE;
Word = malloc(size);
ExprPtr++;
while (*ExprPtr != '\0' && *ExprPtr != '\'') {
if (*ExprPtr == '\\') {
switch (*(ExprPtr + 1)) {
case '\\':
case '\'':
Word[length++] = *(ExprPtr + 1);
ExprPtr += 2;
break;
case 'a':
Word[length++] = '\a';
ExprPtr += 2;
break;
case 'b':
Word[length++] = '\b';
ExprPtr += 2;
break;
case 't':
Word[length++] = '\t';
ExprPtr += 2;
break;
case 'n':
Word[length++] = '\n';
ExprPtr += 2;
break;
case 'v':
Word[length++] = '\v';
ExprPtr += 2;
break;
case 'f':
Word[length++] = '\f';
ExprPtr += 2;
break;
case 'r':
Word[length++] = '\r';
ExprPtr += 2;
break;
default:
error("Evaluator: unknown escape sequence '\\%c' in <%s>", *(ExprPtr + 1), Expression);
Word[length++] = *ExprPtr++;
}
} else {
Word[length++] = *ExprPtr++;
}
if (length >= size) {
size += CHUNK_SIZE;
Word = realloc(Word, size);
}
}
Word[length] = '\0';
Token = T_STRING;
if (*ExprPtr == '\'')
if (*ExprPtr == '\'') {
ExprPtr++;
} else {
error("Evaluator: unterminated string in <%s>", Expression);
}
}
/* non-alpha operators */