day 1

1 files changed, 74 insertions, 0 deletions

diff --git a/input.c b/input.c
new file mode 100644
index 0000000..1c72194
--- /dev/null
+++ b/input.c
@@ -0,0 +1,74 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <err.h>
+#include "input.h"
+
+size_t count_lines(FILE* file) {
+	size_t lineCount = 0;
+	char currentChar;
+	// on part du debut
+	// TODO verifier le code de retour
+	fseek(file, 0, SEEK_SET);
+	while((currentChar=fgetc(file)) != EOF) {
+		if(currentChar == '\n')
+			lineCount++;
+	}
+	return lineCount;
+}
+
+void input_int_read(struct input_int* result, char* filename) {
+	// open input file
+	FILE* file=fopen(filename, "r");
+	if(file == NULL)
+		err(1, "cannot open file %s\n", filename);
+	// compute line count
+	result->line_count = count_lines(file);
+	// read each line of the file
+	// TODO check return code
+	fseek(file, 0, SEEK_SET);
+	int current;
+	result->lines = malloc(result->line_count * sizeof(int));
+	for(size_t lineIndex = 0; lineIndex < result->line_count; lineIndex++) {
+		if(fscanf(file, "%d", &current) != 1)
+			err(1, "parsing error line %ld\n", lineIndex);
+			
+		result->lines[lineIndex] = current;
+	}
+
+	// close file
+	fclose(file);
+}
+
+void input_str_read(struct input_str* result, char* filename) {
+	// open input file
+	FILE* file=fopen(filename, "r");
+	if(file == NULL)
+		err(1, "cannot open file %s\n", filename);
+	// compute line count
+	result->line_count = count_lines(file);
+	
+	// read each line of the file
+	// TODO check return code
+	fseek(file, 0, SEEK_SET);
+	size_t lineSize = 0;
+	result->lines = malloc(result->line_count * sizeof(char*));
+	for(size_t lineIndex = 0; lineIndex < result->line_count; lineIndex++) {
+		char** dst = &(result->lines[lineIndex]);
+		if(getline(dst, &lineSize, file) < 0)
+			err(1, "read error line %ld\n", lineIndex);
+	}
+
+	fclose(file);
+}
+
+void input_int_free(struct input_int* input) {
+	free(input->lines);
+}
+
+void input_str_free(struct input_str* input) {
+	for(size_t i = 0; i < input->line_count; i++) {
+		free(input->lines[i]);
+	}
+	free(input->lines);
+}