diff options
Diffstat (limited to 'miniany/libc-freestanding.c')
| -rw-r--r-- | miniany/libc-freestanding.c | 39 |
1 files changed, 34 insertions, 5 deletions
diff --git a/miniany/libc-freestanding.c b/miniany/libc-freestanding.c index 31808e7..a68a0c5 100644 --- a/miniany/libc-freestanding.c +++ b/miniany/libc-freestanding.c @@ -30,6 +30,33 @@ int strcmp( char *s1, char *s2 ) return *s1 - *s2; } +int memcmp( char *s1, char *s2, int n ) +{ + while( n > 0 ) { + if( *s1 != *s2 ) { + return *s1 - *s2; + } + n--; + s1++; + s2++; + } + + return 0; +} + +char *memset( char *d, int c, int n ) +{ + char *s = d; + + while( n > 0 ) { + *s = (char)c; + s++; + n--; + } + + return d; +} + int isspace( int c ) { if( c == ' ' || c == '\r' || c == '\n' || c == '\t' ) return 1; @@ -132,9 +159,10 @@ enum { static void print_char( int fd, int c ) { - /* gcc 10 and 11 think on -O1 and -O2 that s can be held in registers, thus - * clobbering the output? Let's put a volatile here seems to help. Neither - * clang nor tcc show this behaviour.. + /* gcc 10 and 11 think on -Os, -O1 and -O2 that 's' can be held + * in registers, thus clobbering the output? Let's put a + * volatile here seems to help. Neither clang, pcc or tcc show + * this behaviour.. */ volatile char s[1]; s[0] = c; @@ -396,17 +424,18 @@ void free( char *ptr ) } } -char *memcpy( char *d, char *s, int len ) +char *memcpy( char *d, char *s, int n ) { char *p; char *q; p = s; q = d; - while( len-- ) { + while( n > 0 ) { *q = *p; q++; p++; + n--; } return d; |