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-rw-r--r--shell/msh.c17
1 files changed, 8 insertions, 9 deletions
diff --git a/shell/msh.c b/shell/msh.c
index 41f4cc60d..d9dd3efb2 100644
--- a/shell/msh.c
+++ b/shell/msh.c
@@ -1191,23 +1191,22 @@ static int isassign(const char *s)
unsigned char c;
DBGPRINTF7(("ISASSIGN: enter, s=%s\n", s));
- /* no isalpha() - we shouldn't use locale */
c = *s;
- if (c != '_'
- && (unsigned)((c|0x20) - 'a') > 25 /* not letter */
- ) {
+ /* no isalpha() - we shouldn't use locale */
+ /* c | 0x20 - lowercase (Latin) letters */
+ if (c != '_' && (unsigned)((c|0x20) - 'a') > 25)
+ /* not letter */
return 0;
- }
+
while (1) {
c = *++s;
- if (c == '\0')
- return 0;
if (c == '=')
return 1;
- c |= 0x20; /* lowercase letters, doesn't affect numbers */
+ if (c == '\0')
+ return 0;
if (c != '_'
&& (unsigned)(c - '0') > 9 /* not number */
- && (unsigned)(c - 'a') > 25 /* not letter */
+ && (unsigned)((c|0x20) - 'a') > 25 /* not letter */
) {
return 0;
}