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author | Alex Auvolat <alex.auvolat@ens.fr> | 2014-11-30 20:05:47 +0100 |
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committer | Alex Auvolat <alex.auvolat@ens.fr> | 2014-11-30 20:05:47 +0100 |
commit | a375561ca15a99dd7024e5b8170a3c8fcf25b892 (patch) | |
tree | 06ec9ff45e49400d67f73ce20b3236d8551916a5 /kernel/lib | |
parent | 54e7efbbd0e0c88d99bb6bddb82e9fc8d90eae50 (diff) | |
download | macroscope-a375561ca15a99dd7024e5b8170a3c8fcf25b892.tar.gz macroscope-a375561ca15a99dd7024e5b8170a3c8fcf25b892.zip |
More library functions & renaming.
Diffstat (limited to 'kernel/lib')
-rw-r--r-- | kernel/lib/stdlib.c | 8 | ||||
-rw-r--r-- | kernel/lib/string.c | 68 |
2 files changed, 68 insertions, 8 deletions
diff --git a/kernel/lib/stdlib.c b/kernel/lib/stdlib.c deleted file mode 100644 index 6710da2..0000000 --- a/kernel/lib/stdlib.c +++ /dev/null @@ -1,8 +0,0 @@ -#include <stdlib.h> - -size_t strlen(const char* str) { - size_t ret = 0; - while (str[ret] != 0) - ret++; - return ret; -} diff --git a/kernel/lib/string.c b/kernel/lib/string.c new file mode 100644 index 0000000..da8f60e --- /dev/null +++ b/kernel/lib/string.c @@ -0,0 +1,68 @@ +#include <string.h> + + +size_t strlen(const char* str) { + size_t ret = 0; + while (str[ret] != 0) + ret++; + return ret; +} + +char *strchr(const char *str, char c) { + while (*str) { + if (*str == c) return (char*)str; + str++; + } + return NULL; +} + +char *strcpy(char *dest, const char *src) { + memcpy(dest, src, strlen(src) + 1); + return (char*)src; +} + +char *strcat(char *dest, const char *src) { + char *dest2 = dest; + dest2 += strlen(dest) - 1; + while (*src) { + *dest2 = *src; + src++; + dest2++; + } + *dest2 = 0; + return dest; +} + +int strcmp(const char *s1, const char *s2) { + while ((*s1) && (*s1 == *s2)) { + s1++; + s2++; + } + return (* (unsigned char*)s1 - *(unsigned char*)s2); +} + +void *memcpy(void *vd, const void *vs, int count) { + uint8_t *dest = (uint8_t*)vd, *src = (uint8_t*)vs; + int f = count % 4, n = count / 4, i; + const uint32_t* s = (uint32_t*)src; + uint32_t* d = (uint32_t*)dest; + for (i = 0; i < n; i++) { + d[i] = s[i]; + } + if (f != 0) { + for (i = count - f; i < count; i++) { + dest[i] = src[i]; + } + } + return vd; +} + +void *memset(void *dest, int val, int count) { + uint8_t *dest_c = (uint8_t*)dest; + int i; + for (i = 0; i < count; i++) { + dest_c[i] = val; + } + return dest; +} + |