move functions from io.c to session.c

1 files changed, 153 insertions, 0 deletions

diff --git a/session.c b/session.c
index a443392..c15985f 100644
--- a/session.c
+++ b/session.c
@@ -1,6 +1,159 @@
 #define SESSION_FILENAME "session.txt"
 #define SESSION_VERSION "\x7fTED0002"
 
+static void write_u8(FILE *fp, u8 x) {
+	putc(x, fp);
+}
+
+static void write_u16(FILE *fp, u16 x) {
+	fwrite(&x, sizeof x, 1, fp);
+}
+
+static void write_u32(FILE *fp, u32 x) {
+	fwrite(&x, sizeof x, 1, fp);
+}
+
+static void write_u64(FILE *fp, u64 x) {
+	fwrite(&x, sizeof x, 1, fp);
+}
+
+static void write_i8(FILE *fp, i8 x) {
+	fwrite(&x, sizeof x, 1, fp);
+}
+
+static void write_i16(FILE *fp, i16 x) {
+	fwrite(&x, sizeof x, 1, fp);
+}
+
+static void write_i32(FILE *fp, i32 x) {
+	fwrite(&x, sizeof x, 1, fp);
+}
+
+static void write_i64(FILE *fp, i64 x) {
+	fwrite(&x, sizeof x, 1, fp);
+}
+
+static void write_float(FILE *fp, float x) {
+	fwrite(&x, sizeof x, 1, fp);
+}
+
+static void write_double(FILE *fp, double x) {
+	fwrite(&x, sizeof x, 1, fp);
+}
+
+static void write_char(FILE *fp, char x) {
+	fwrite(&x, sizeof x, 1, fp);
+}
+
+static void write_bool(FILE *fp, bool x) {
+	putc(x, fp);
+}
+
+static u8 read_u8(FILE *fp) {
+	return (u8)getc(fp);
+}
+
+static u16 read_u16(FILE *fp) {
+	u16 x = 0;
+	fread(&x, sizeof x, 1, fp);
+	return x;
+}
+
+static u32 read_u32(FILE *fp) {
+	u32 x = 0;
+	fread(&x, sizeof x, 1, fp);
+	return x;
+}
+
+static u64 read_u64(FILE *fp) {
+	u64 x = 0;
+	fread(&x, sizeof x, 1, fp);
+	return x;
+}
+
+static i8 read_i8(FILE *fp) {
+	i8 x = 0;
+	fread(&x, sizeof x, 1, fp);
+	return x;
+}
+
+static i16 read_i16(FILE *fp) {
+	i16 x = 0;
+	fread(&x, sizeof x, 1, fp);
+	return x;
+}
+
+static i32 read_i32(FILE *fp) {
+	i32 x = 0;
+	fread(&x, sizeof x, 1, fp);
+	return x;
+}
+
+static i64 read_i64(FILE *fp) {
+	i64 x = 0;
+	fread(&x, sizeof x, 1, fp);
+	return x;
+}
+
+static float read_float(FILE *fp) {
+	float x = 0;
+	fread(&x, sizeof x, 1, fp);
+	return x;
+}
+
+static double read_double(FILE *fp) {
+	double x = 0;
+	fread(&x, sizeof x, 1, fp);
+	return x;
+}
+
+static char read_char(FILE *fp) {
+	char x = 0;
+	fread(&x, sizeof x, 1, fp);
+	return x;
+}
+
+static bool read_bool(FILE *fp) {
+	return (bool)getc(fp);
+}
+
+static void write_cstr(FILE *fp, char const *cstr) {
+	fwrite(cstr, 1, strlen(cstr) + 1, fp);
+}
+
+static void read_cstr(FILE *fp, char *out, size_t out_sz) {
+	char *p = out, *end = out + out_sz;
+	while (1) {
+		if (p >= end - 1) {
+			*p = '\0';
+			break;
+		}
+		int c = getc(fp);
+		if (c == 0 || c == EOF) {
+			*p = '\0';
+			break;
+		}
+		*p++ = (char)c;
+	}
+}
+
+
+// write a buffer position to a file
+static void buffer_pos_write(BufferPos pos, FILE *fp) {
+	write_u32(fp, pos.line);
+	write_u32(fp, pos.index);
+}
+
+// read a buffer position from a file, and validate it
+static BufferPos buffer_pos_read(TextBuffer *buffer, FILE *fp) {
+	BufferPos pos = {0};
+	pos.line = read_u32(fp);
+	pos.index = read_u32(fp);
+	buffer_pos_validate(buffer, &pos);
+	return pos;
+}
+
+
 static void session_write_node(Ted *ted, FILE *fp, u16 node_idx) {
 	Node *node = &ted->nodes[node_idx];
 	write_u16(fp, node_idx);