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Fixed bug in string escape parsing & added escape sequences

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This commit is contained in:
Curtis F Kaylor 2018-07-21 16:08:06 -04:00
parent ff70ba739a
commit 0082eb3096
2 changed files with 23 additions and 3 deletions
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15
doc/c02.txt
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@ -173,7 +173,20 @@ A string is a consecutive series of characters terminated by an ASCII null
character (a byte with the value 0).
A string literal is written as up to 255 printable characters. prefixed and
suffixed with " characters.
suffixed with " characters.
The " character and a subset of ASCII control characters can be specified
in a string literal by using escape sequences prefixed with the \ symbol:
\b $08 Backspace
\e $08 Escape
\f $0C Form Feed
\n $0A Line Feed
\r $0D Carriage Return
\t $09 Tab
\v $0B Vertical Tab
\" $22 Double Quotation Mark
\\ $5C Backslash
SYMBOLS

11
src/parse.c
View File

@ -139,7 +139,14 @@ void getwrd(void) {
char escape(char c) {
DEBUG("Escaping character '%c'\n", c)
switch (c) {
case 'r': return 0x0d;
case 'a': return 0x07; //Alert (Beep/Bell)
case 'b': return 0x08; //Backspace
case 'e': return 0x08; //Escape
case 'f': return 0x0C; //Form Feed
case 'n': return 0x0A; //Newline (Line Feed)
case 'r': return 0x0D; //Return (Carriage Return)
case 't': return 0x09; //Tab (Horizontal)
case 'v': return 0x0B; //Vertical Tab
default: return c;
}
}
@ -151,7 +158,7 @@ void getstr(void) {
DEBUG("Parsing string\n", 0)
strdel = getnxt(); //Get String Delimiter
CCMNT(strdel);
while(match(strdel) == escnxt) {
while(!match(strdel) || escnxt) {
CCMNT(nxtchr);
if (escnxt) {
word[wrdlen++] = escape(getnxt());