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Finish functions in bytes.c

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This commit is contained in:
Nathan Fisher 2023-07-20 22:50:22 -04:00
parent 197a49934d
commit 1be20dd542
2 changed files with 30 additions and 18 deletions
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10
Makefile
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@ -36,6 +36,7 @@ PREFIX ?= /usr/local
includedir = $(DESTDIR)$(PREFIX)/include
libdir = $(DESTDIR)$(PREFIX)/lib
srcs += src/bytes.c
srcs += src/haggis.c
hdrs += include/haggis.h
@ -71,10 +72,13 @@ haggis.o: $(srcs) $(hdrs)
libhaggis.a: haggis.o
$(AR) rcs $@ haggis.o
haggis_shared.o: $(srcs) $(hdrs)
$(CC) -c $(cflags) -fpic -o $@ $(srcs)
bytes_shared.o: src/bytes.c include/haggis.h
$(CC) -c $(cflags) -fpic -o $@ src/bytes.c
libhaggis.so: haggis_shared.o
haggis_shared.o: src/haggis.c include/haggis.h
$(CC) -c $(cflags) -fpic -o $@ src/haggis.c
libhaggis.so: bytes_shared.o haggis_shared.o
$(CC) -shared -o $@ haggis_shared.o
clean:

38
src/bytes.c
View file

@ -26,14 +26,29 @@ u16 le_bytes_to_u16(u8 arr[2]) {
}
void u64_to_le_bytes(u64 num, u8 arr[8]) {
// todo
u64 eighth = (num & 0xFF00000000000000) >> 56;
u64 seventh = (num & 0xFF000000000000) >> 48;
u64 sixth = (num & 0xFF0000000000) >> 40;
u64 fifth = (num & 0xFF00000000) >> 32;
u64 fourth = (num & 0xFF000000) >> 24;
u64 third = (num & 0xFF0000) >> 16;
u64 second = (num & 0xFF00) >> 8;
u64 first = num & 0xFF;
arr[0] = (u8)first;
arr[1] = (u8)second;
arr[2] = (u8)third;
arr[3] = (u8)fourth;
arr[4] = (u8)fifth;
arr[5] = (u8)sixth;
arr[6] = (u8)seventh;
arr[7] = (u8)eighth;
}
void u32_to_le_bytes(u32 num, u8 arr[4]) {
u32 fourth = (num & 0xFF000000) >> 24;
u32 third = (num & 0x00FF0000) >> 16;
u32 second = (num & 0x0000FF00) >> 8;
u32 first = num & 0x000000FF;
u32 third = (num & 0xFF0000) >> 16;
u32 second = (num & 0xFF00) >> 8;
u32 first = num & 0xFF;
arr[0] = (u8)first;
arr[1] = (u8)second;
arr[2] = (u8)third;
@ -41,16 +56,9 @@ void u32_to_le_bytes(u32 num, u8 arr[4]) {
}
void u16_to_le_bytes(u16 num, u8 arr[2]) {
// todo
u16 second = (num & 0xFF00) >> 8;
u16 first = num & 0xFF;
arr[0] = (u8)first;
arr[1] = (u8)second;
}
int main() {
u8 arr[4] = { 42, 1, 0, 0 };
u8 new_arr[4];
u32 num;
num = le_bytes_to_u32(arr);
printf("Num: %i\n", num);
u32_to_le_bytes(num, new_arr);
printf("Array: { %i, %i, %i, %i };\n", new_arr[0], new_arr[1], new_arr[2], new_arr[3]);
}