From 14b109ea24dc5cb1db948de57a2a44c80ef4622e Mon Sep 17 00:00:00 2001 From: Brett Weiland Date: Wed, 24 Mar 2021 15:36:54 -0500 Subject: 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 --- src/kernel/libs/libc.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) (limited to 'src/kernel/libs/libc.c') 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 #include -//#include -// 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); +} -- cgit v1.2.3