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dtc: Support character literals in cell lists

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With this patch the following property assignment:

    property = <0x12345678 'a' '\r' 100>;

is equivalent to:

    property = <0x12345678 0x00000061 0x0000000D 0x00000064>

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 12:16:30 -07:00 • committed by Jon Loeliger
parent 83df28bd39
commit a4ea2fa951
9 changed files with 107 additions and 1 deletions
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32
dtc-parser.y
View file

@ -34,6 +34,7 @@ extern struct boot_info *the_boot_info;
extern int treesource_error;
static unsigned long long eval_literal(const char *s, int base, int bits);
static unsigned char eval_char_literal(const char *s);
%}
%union {
@ -57,6 +58,7 @@ static unsigned long long eval_literal(const char *s, int base, int bits);
%token DT_MEMRESERVE
%token <propnodename> DT_PROPNODENAME
%token <literal> DT_LITERAL
%token <literal> DT_CHAR_LITERAL
%token <cbase> DT_BASE
%token <byte> DT_BYTE
%token <data> DT_STRING
@ -265,6 +267,10 @@ cellval:
{
$$ = eval_literal($1, 0, 32);
}
| DT_CHAR_LITERAL
{
$$ = eval_char_literal($1);
}
;
bytestring:
@ -343,3 +349,29 @@ static unsigned long long eval_literal(const char *s, int base, int bits)
print_error("bad literal");
return val;
}
static unsigned char eval_char_literal(const char *s)
{
int i = 1;
char c = s[0];
if (c == '\0')
{
print_error("empty character literal");
return 0;
}
/*
* If the first character in the character literal is a \ then process
* the remaining characters as an escape encoding. If the first
* character is neither an escape or a terminator it should be the only
* character in the literal and will be returned.
*/
if (c == '\\')
c = get_escape_char(s, &i);
if (s[i] != '\0')
print_error("malformed character literal");
return c;
}