more config

1 files changed, 64 insertions, 2 deletions

diff --git a/config.c b/config.c
index 4ae3dbb..8218399 100644
--- a/config.c
+++ b/config.c
@@ -6,7 +6,69 @@
 // thing2 = 454
 // [section2]
 // asdf = 123
+
+typedef enum {
+	SECTION_NONE,
+	SECTION_KEYBOARD
+} Section;
+
 void config_read(Ted *ted, char const *filename) {
-	char section_name[32] = {0};
-	// @TODO
+	FILE *fp = fopen(filename, "rb");
+	if (fp) {
+		u32 line_number = 1;
+		int line_cap = 4096;
+		char *line = ted_malloc(ted, (size_t)line_cap);
+		if (line) {
+			Section section = SECTION_NONE;
+
+			while (fgets(line, line_cap, fp)) {
+				char *newline = strchr(line, '\n');
+				if (newline || feof(fp)) {
+					if (newline) *newline = '\0';
+
+					bool error = false;
+
+					// ok, we've now read a line.
+					switch (line[0]) {
+					case '#': // comment
+					case '\0': // blank line
+						break;
+					case '[': { // section header
+					#define SECTION_HEADER_HELP "Section headers should look like this: [section-name]"
+						char *closing = strchr(line, ']');
+						if (!closing) {
+							ted_seterr(ted, "%s:" U32_FMT ": Unmatched [. " SECTION_HEADER_HELP, filename, line_number);
+							error = true;
+						} else if (closing[1] != '\0') {
+							ted_seterr(ted, "%s:" U32_FMT ": Text after section. " SECTION_HEADER_HELP, filename, line_number);
+							error = true;
+						} else {
+							*closing = '\0';
+							char *section_name = line + 1;
+							if (streq(section_name, "keyboard")) {
+								section = SECTION_KEYBOARD;
+							} else {
+								ted_seterr(ted, "%s:" U32_FMT ": Unrecognized section: [%s].", filename, line_number, section_name);
+								error = true;
+							}
+						}
+					} break;
+					}
+
+					if (error) break;
+
+					++line_number;
+				} else {
+					ted_seterr(ted, "%s:" U32_FMT ": Line is too long.", filename, line_number);
+					break;
+				}
+			}
+		}
+		free(line);
+		if (ferror(fp))
+			ted_seterr(ted, "Error reading %s.", filename);
+		fclose(fp);
+	} else {
+		ted_seterr(ted, "Couldn't open file %s.", filename);
+	}
 }