Started work on the config file parser.

1 files changed, 82 insertions, 0 deletions

diff --git a/config.c b/config.c
new file mode 100644
index 0000000..d1bdb10
--- /dev/null
+++ b/config.c
@@ -0,0 +1,82 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+char *read_file(const char *filename, long *size) {
+	/* Open the file. */
+	FILE *fp = fopen(filename, "r");
+	/* Size of the file, in bytes. */
+	long filesize = 0;
+
+	/* Return NULL, if we couldn't open the file. */
+	if (fp == NULL) {
+		fclose(fp);
+		return NULL;
+	}
+
+	/* Return NULL, if we couldn't seek to the end of the file. */
+	if (fseek(fp, 0L, SEEK_END)) {
+		fclose(fp);
+		return NULL;
+	}
+
+	/* Get the size of the file, in bytes. */
+	filesize = ftell(fp);
+
+	/* Return NULL, if the returned size is negative. */
+	if (*filesize < 0) {
+		fclose(fp);
+		return NULL;
+	}
+
+	/* Allocate enough space for the entire file, plus one. */
+	buf = malloc(filesize+1);
+
+	/* Return NULL, if the buffer wasn't allocated. */
+	if (buf == NULL) {
+		fclose(fp);
+		free(cfg);
+		return NULL;
+	}
+
+	/* Zero out the buffer. */
+	memset(buf, 0, filesize+1);
+
+	/* Seek back to the start of the file. */
+	rewind(fp);
+	/* Read the entire file contents into the buffer. */
+	fread(buf, sizeof(char), filesize, fp);
+	/* Close the file. */
+	fclose(fp);
+
+	/* Return the filesize, in bytes. */
+	*size = filesize;
+	/* Return the buffer. */
+	return buf;
+}
+
+config *parse_config(const char *filename) {
+	/* Size of the file, in bytes. */
+	long filesize = 0;
+	/* Config settings. */
+	config *cfg;
+	/* Buffer of the file contents. */
+	char *buf = read_file(filename, &filesize);
+
+	/* Return NULL, if the buffer wasn't allocated */
+	if (buf == NULL) {
+		return NULL;
+	}
+
+	cfg = malloc(sizeof(config));
+
+	/* Return NULL, if cfg wasn't allocated. */
+	if (cfg == NULL) {
+		free(buf);
+		return NULL;
+	}
+
+	for (; *buf != '\0'; buf++) {
+	}
+}