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Treat DEL(\x7f) as a control character #113

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Treat DEL(\x7f) as a control character #113

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9 changes: 5 additions & 4 deletions VT100Terminal.m
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Original file line number Diff line number Diff line change
Expand Up @@ -47,7 +47,8 @@

@implementation VT100Terminal

#define iscontrol(c) ((c) <= 0x1f)
#define iscontrol(c) ((c) <= 0x1f || (c) == 0x7f)
#define isprintable_ascii(c) ((c) > 0x1f && (c) < 0x7f)

/*
Traditional Chinese (Big5)
Expand Down Expand Up @@ -2222,7 +2223,7 @@ static VT100TCC decode_ascii_string(unsigned char *datap,
int len = datalen;

while (len > 0) {
if (*p >= 0x20 && *p <= 0x7f) {
if (isprintable_ascii(*p)) {
p++;
len--;
} else {
Expand Down Expand Up @@ -2668,11 +2669,11 @@ - (VT100TCC)getNextToken
}
} else {
int rmlen = 0;
if (*datap >= 0x20 && *datap <= 0x7f) {
if (isprintable_ascii(*datap)) {
result = decode_ascii_string(datap, datalen, &rmlen);
result.length = rmlen;
result.position = datap;
} else if (iscontrol(datap[0])) {
} else if (iscontrol(*datap)) {
result = decode_control(datap, datalen, &rmlen, ENCODING, SCREEN, useCanonicalParser);
result.length = rmlen;
result.position = datap;
Expand Down