[BusyBox-cvs] CVS update of busybox/libbb (process_escape_sequence.c)
Erik Andersen
andersen at codepoet.org
Mon Jul 26 12:06:20 UTC 2004
Date: Monday, July 26, 2004 @ 06:06:20
Author: andersen
Path: /var/cvs/busybox/libbb
Modified: process_escape_sequence.c (1.6 -> 1.7)
Allow hex escape sequences
Index: busybox/libbb/process_escape_sequence.c
diff -u busybox/libbb/process_escape_sequence.c:1.6 busybox/libbb/process_escape_sequence.c:1.7
--- busybox/libbb/process_escape_sequence.c:1.6 Mon Jul 26 05:28:47 2004
+++ busybox/libbb/process_escape_sequence.c Mon Jul 26 06:06:19 2004
@@ -22,42 +22,35 @@
*
*/
-#include <string.h>
#include <stdio.h>
#include <limits.h>
-#include <ctype.h>
#include "libbb.h"
-#define isodigit(c) ((c) >= '0' && (c) <= '7')
-#define hextobin(c) ((c)>='a'&&(c)<='f' ? (c)-'a'+10 : (c)>='A'&&(c)<='F' ? (c)-'A'+10 : (c)-'0')
-#define octtobin(c) ((c) - '0')
char bb_process_escape_sequence(const char **ptr)
{
- const char *p, *q;
- unsigned int num_digits, r, n, hexescape;
static const char charmap[] = {
'a', 'b', 'f', 'n', 'r', 't', 'v', '\\', 0,
'\a', '\b', '\f', '\n', '\r', '\t', '\v', '\\', '\\' };
- n = r = hexescape = num_digits = 0;
- q = *ptr;
+ const char *p;
+ const char *q;
+ unsigned int num_digits;
+ unsigned int r;
+ unsigned int n;
- if (*q == 'x') {
- hexescape++;
- ++q;
- }
+ n = 0;
+ q = *ptr;
+ num_digits = 0;
do {
- if (hexescape && isxdigit(*q)) {
- r = n * 16 + hextobin(*q);
- } else if (isodigit(*q)) {
- r = n * 8 + octtobin(*q);
- }
- if (r <= UCHAR_MAX) {
- n = r;
- ++q;
- if (++num_digits < 3) {
- continue;
+ if (((unsigned int)(*q - '0')) <= 7) {
+ r = n * 8 + (*q - '0');
+ if (r <= UCHAR_MAX) {
+ n = r;
+ ++q;
+ if (++num_digits < 3) {
+ continue;
+ }
}
}
break;
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