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dtc: Refactor character literal parsing code

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Move the parsing of hex, octal and escaped characters from data.c
to util.c where it can be used for character literal parsing within
strings as well as for stand alone C style character literals.

Signed-off-by: Anton Staaf <robotboy@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Anton Staaf 2011-09-09 12:16:29 -07:00 • committed by Jon Loeliger
parent ed8fee1a64
commit b43335a238
3 changed files with 110 additions and 80 deletions
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83
data.c
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@ -68,40 +68,6 @@ struct data data_copy_mem(const char *mem, int len)
return d;
}
static char get_oct_char(const char *s, int *i)
{
char x[4];
char *endx;
long val;
x[3] = '\0';
strncpy(x, s + *i, 3);
val = strtol(x, &endx, 8);
assert(endx > x);
(*i) += endx - x;
return val;
}
static char get_hex_char(const char *s, int *i)
{
char x[3];
char *endx;
long val;
x[2] = '\0';
strncpy(x, s + *i, 2);
val = strtol(x, &endx, 16);
if (!(endx > x))
die("\\x used with no following hex digits\n");
(*i) += endx - x;
return val;
}
struct data data_copy_escape_string(const char *s, int len)
{
int i = 0;
@ -114,53 +80,10 @@ struct data data_copy_escape_string(const char *s, int len)
while (i < len) {
char c = s[i++];
if (c != '\\') {
q[d.len++] = c;
continue;
}
if (c == '\\')
c = get_escape_char(s, &i);
c = s[i++];
assert(c);
switch (c) {
case 'a':
q[d.len++] = '\a';
break;
case 'b':
q[d.len++] = '\b';
break;
case 't':
q[d.len++] = '\t';
break;
case 'n':
q[d.len++] = '\n';
break;
case 'v':
q[d.len++] = '\v';
break;
case 'f':
q[d.len++] = '\f';
break;
case 'r':
q[d.len++] = '\r';
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
i--; /* need to re-read the first digit as
* part of the octal value */
q[d.len++] = get_oct_char(s, &i);
break;
case 'x':
q[d.len++] = get_hex_char(s, &i);
break;
default:
q[d.len++] = c;
}
q[d.len++] = c;
}
q[d.len++] = '\0';