more basics + build stuff

This commit is contained in:
Christoph J. Scherr 2023-10-30 10:30:53 +01:00
parent 367f5a3aab
commit f0ffe26987
5 changed files with 93 additions and 42 deletions

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@ -42,7 +42,10 @@ add_executable( tabtest src/tabtest.c )
add_executable( umlaut src/umlaut.c )
add_executable( unary-double-not src/unary-double-not.c )
add_executable( warning src/warning.c )
add_executable( miniio src/miniio.c )
add_executable( stackoverflow src/stackoverflow.c )
add_executable( pointer-arithmetic src/pointer-arithmetic.c )
add_executable( while-to-do-while src/while-to-do-while.c )
target_link_libraries(abc m) # link libm to abc
@ -53,9 +56,9 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
add_executable( huffman src/huffman/src/huffman.c )
execute_process (
COMMAND bash -c "mkdir -p src/huffman/testfiles"
COMMAND bash -c "mkdir -p src/huffman/testfiles"
COMMAND bash -c "yes 'SAFJALJ AF OIAIFOsdp' | head -c 100KB > src/huffman/testfiles/small.txt"
COMMAND bash -c "dd if=/dev/urandom of=src/huffman/testfiles/1K-random.img count=1KiB"
COMMAND bash -c "dd if=/dev/urandom of=src/huffman/testfiles/1K-random.img count=1KiB"
COMMAND bash -c "dd if=/dev/urandom of=src/huffman/testfiles/10K-random.img count=10KiB"
COMMAND bash -c "dd if=/dev/urandom of=src/huffman/testfiles/100K-random.img count=100KiB"
COMMAND bash -c "dd if=/dev/urandom of=src/huffman/testfiles/1M-random.img count=1MiB"

2
build.sh Executable file
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@ -0,0 +1,2 @@
#!/bin/bash
cmake . && cmake --build .

20
src/miniio.c Normal file
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@ -0,0 +1,20 @@
#include <stdio.h>
#include <string.h>
int my_strlen(const char *s) {
int len = 0;
while (s[len] != 0) {
len++;
}
return len;
}
int main() {
char word[] = "hallo\0"; // not NULL terminated
printf("word is %d long\n", my_strlen(word));
printf("word is actually %lu long\n", strlen(word));
printf("success: %b", my_strlen(word) == strlen(word));
return 0;
}

11
src/stackoverflow.c Normal file
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@ -0,0 +1,11 @@
int mem = 0x1337;
void foo() {
int buf = 0;
foo();
}
int main() {
foo();
return 0;
}

15
src/while-to-do-while.c Normal file
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@ -0,0 +1,15 @@
#include <stdio.h>
int main() {
int init = 5;
int i = init;
while (i < 10 || i == init) {
printf("helo %d\n", i);
i++;
}
i = init;
do {
printf("ahelo %d\n", i);
i++;
} while (i < 10);
}