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nasm_unquote: make code a little more uniform

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Make the code a bit more consistent:

- ndig is now always a countdown, and we always to the (p > escp+1)
  test to see if we got anything at all (this is to deal with stuff
  like \x without a digit.)
- Add missing break; after 'v' (bug!).
- Preinitialize nval to zero.
This commit is contained in:
H. Peter Anvin 2008-06-02 10:02:36 -07:00
parent 1df123bdbf
commit e46fec66ca
1 changed files with 9 additions and 9 deletions
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18
quote.c
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@ -233,6 +233,7 @@ size_t nasm_unquote(char *str)
case st_backslash:
state = st_start;
escp = p-1;
nval = 0;
switch (c) {
case 'a':
*q++ = 7;
@ -258,19 +259,18 @@ size_t nasm_unquote(char *str)
case 'u':
state = st_ucs;
ndig = 4;
nval = 0;
break;
case 'U':
state = st_ucs;
ndig = 8;
nval = 0;
break;
case 'v':
*q++ = 11;
break;
case 'x':
case 'X':
state = st_hex;
ndig = nval = 0;
ndig = 2;
break;
case '0':
case '1':
@ -281,7 +281,7 @@ size_t nasm_unquote(char *str)
case '6':
case '7':
state = st_oct;
ndig = 1;
ndig = 2; /* Up to two more digits */
nval = c - '0';
break;
default:
@ -293,7 +293,7 @@ size_t nasm_unquote(char *str)
case st_oct:
if (c >= '0' && c <= '7') {
nval = (nval << 3) + (c - '0');
if (++ndig >= 3) {
if (!--ndig) {
*q++ = nval;
state = st_start;
}
@ -309,13 +309,13 @@ size_t nasm_unquote(char *str)
(c >= 'A' && c <= 'F') ||
(c >= 'a' && c <= 'f')) {
nval = (nval << 4) + numvalue(c);
if (++ndig >= 2) {
if (--ndig) {
*q++ = nval;
state = st_start;
}
} else {
p--; /* Process this character again */
*q++ = ndig ? nval : *escp;
*q++ = (p > escp+1) ? nval : *escp;
state = st_start;
}
break;
@ -348,10 +348,10 @@ size_t nasm_unquote(char *str)
*q++ = nval;
break;
case st_hex:
*q++ = ndig ? nval : *escp;
*q++ = (p > escp+1) ? nval : *escp;
break;
case st_ucs:
if (ndig)
if (p > escp+1)
q = emit_utf8(q, nval);
else
*q++ = *escp;