1 files changed, 77 insertions, 0 deletions
diff --git a/src/log.c b/src/log.c
new file mode 100644
index 0000000..efcf9db
--- /dev/null
+++ b/src/log.c
@@ -0,0 +1,77 @@
+#include <log.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static void context_print(FILE *fd, struct ctx *ctx)
+{
+	const char *data = ctx->data ? ctx->data : ctx->raw;
+
+	// Find line, column
+	size_t line = 0, column = 0, index = 0;
+	for (; index < ctx->size; index++) {
+		char cur = data[index];
+
+		column++;
+
+		if (line == ctx->line && column == ctx->column)
+			break;
+
+		if (cur == '\n') {
+			line++;
+			column = 0;
+			continue;
+		} else if (cur == '\0') {
+			fprintf(stderr, "Invalid context!");
+			context_destroy(ctx);
+			exit(1);
+			break;
+		}
+	}
+
+	if (++index >= ctx->size)
+		return; // Couldn't find context, idc?
+
+	fprintf(fd, "\x1B[1;36m%s:%ld:%ld:\x1B[0m '", ctx->path, ctx->line + 1, ctx->column + 1);
+
+	// Print line context
+	size_t start = ctx->column > 5 ? index - 5 : index;
+	size_t end = ctx->size - index > 5 ? index + 5 : index + 1;
+	for (size_t i = start; i < end; i++) {
+		if (i == index) {
+			fprintf(fd, "\x1B[1;32m%c\x1B[0m", data[i]);
+		} else {
+			fprintf(fd, "%c", data[i]);
+		}
+	}
+	fprintf(fd, "': ");
+}
+
+void errln(struct ctx *ctx, const char *fmt, ...)
+{
+	context_print(stderr, ctx);
+
+	fprintf(stderr, "\x1B[1;31m");
+	va_list ap;
+	va_start(ap, fmt);
+	vfprintf(stderr, fmt, ap);
+	fprintf(stderr, "\n");
+	va_end(ap);
+	fprintf(stderr, "\x1B[0m");
+
+	context_destroy(ctx);
+	exit(1);
+}
+
+void err(const char *fmt, ...)
+{
+	fprintf(stderr, "\x1B[1;31m");
+	va_list ap;
+	va_start(ap, fmt);
+	vfprintf(stderr, fmt, ap);
+	fprintf(stderr, "\n");
+	va_end(ap);
+	fprintf(stderr, "\x1B[0m");
+
+	exit(1);
+}