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authorBrett Weiland <brett_weiland@bpcspace.com>2021-03-24 15:36:54 -0500
committerBrett Weiland <brett_weiland@bpcspace.com>2021-03-24 15:38:09 -0500
commit14b109ea24dc5cb1db948de57a2a44c80ef4622e (patch)
treee397997d9c8d9c1b50a5a5235d38c6b0e8f24b5b /src/kernel/libs/libc.c
parent13000d6f44d66da795e92e4b2ddc37ce879bf275 (diff)
modified: README.md
modified: compiler/create_crosscompiler.sh deleted: notes modified: src/.gdb_history deleted: src/amd64_vol2.pdf modified: src/bootloader/bios_functions/bios_disk.asm modified: src/bootloader/bios_functions/print.asm modified: src/bootloader/bootloader.asm modified: src/bootloader/cpu_check.asm modified: src/bootloader/enter_kernel.asm deleted: src/bootloader/enter_kernel_backup modified: src/bootloader/gdt.asm deleted: src/bootloader/multicore.asm deleted: src/bootloader/notes new file: src/debug/gdbinit.gdb deleted: src/indigo_os modified: src/kernel/include/libc.h modified: src/kernel/include/paging.h modified: src/kernel/include/video.h modified: src/kernel/kernel.c modified: src/kernel/libs/acpi.c modified: src/kernel/libs/drivers/serial.c modified: src/kernel/libs/drivers/video.c modified: src/kernel/libs/libc.c modified: src/kernel/libs/page.c modified: src/link.ld modified: src/makefile new file: tools/README.md modified: tools/page/page.py
Diffstat (limited to 'src/kernel/libs/libc.c')
-rw-r--r--src/kernel/libs/libc.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/src/kernel/libs/libc.c b/src/kernel/libs/libc.c
index 31580ff..dc5c0ac 100644
--- a/src/kernel/libs/libc.c
+++ b/src/kernel/libs/libc.c
@@ -1,7 +1,6 @@
#include <stddef.h>
#include <stdint.h>
-//#include <printf.h>
-// you need to sort all these into diffrent files! TODO
+// TODO clean up variable names
int strncmp(const char *s1, const char *s2, unsigned int n) {
int i;
for(i = 0; ((i <= n) && (s1[i] != '\0') && (s2[i] != '\0')); i++) {
@@ -23,7 +22,7 @@ int strcmp(const char *s1, const char *s2) {
}
int memcmp(const void *s1, const void *s2, size_t n) {
- const unsigned char *p1 = s1; // Why is c such a bitch?
+ const unsigned char *p1 = s1;
const unsigned char *p2 = s2;
int i;
for(i = 0; i < n; i++) {
@@ -45,3 +44,17 @@ void memcpy(char *dest, char *src, size_t n) {
dest[i] = src[i];
}
}
+
+void bzero(void *dest, size_t size) {
+ unsigned char *p1 = dest;
+ for(uint64_t i = 0; i < size; i++) {
+ p1[i] = 0;
+ }
+}
+
+//TODO move this function to a seperate math library
+int ceil(float n) {
+ int low_n = (int)n;
+ if(n == (float)low_n) return(low_n);
+ return(low_n + 1);
+}