git2d: Import BARE and UTF-8 utilities

1 files changed, 70 insertions, 0 deletions

diff --git a/git2d/bare.h b/git2d/bare.h
new file mode 100644
index 0000000..389017f
--- /dev/null
+++ b/git2d/bare.h
@@ -0,0 +1,70 @@
+/*-
+ * SPDX-License-Identifier: MIT
+ * SPDX-FileCopyrightText: Copyright (c) 2022 Frank Smit <https://61924.nl/>
+ */
+
+#ifndef BARE_H
+#define BARE_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+typedef enum {
+	BARE_ERROR_NONE,
+	BARE_ERROR_WRITE_FAILED,
+	BARE_ERROR_READ_FAILED,
+	BARE_ERROR_BUFFER_TOO_SMALL,
+	BARE_ERROR_INVALID_UTF8,
+} bare_error;
+
+typedef bare_error (*bare_write_func)(void *buffer, void *src, uint64_t sz);
+typedef bare_error (*bare_read_func)(void *buffer, void *dst, uint64_t sz);
+
+struct bare_writer {
+	void *buffer;
+	bare_write_func write;
+};
+
+struct bare_reader {
+	void *buffer;
+	bare_read_func read;
+};
+
+bare_error bare_put_uint(struct bare_writer *ctx, uint64_t x); /* varuint */
+bare_error bare_get_uint(struct bare_reader *ctx, uint64_t *x); /* varuint */
+bare_error bare_put_u8(struct bare_writer *ctx, uint8_t x);
+bare_error bare_get_u8(struct bare_reader *ctx, uint8_t *x);
+bare_error bare_put_u16(struct bare_writer *ctx, uint16_t x);
+bare_error bare_get_u16(struct bare_reader *ctx, uint16_t *x);
+bare_error bare_put_u32(struct bare_writer *ctx, uint32_t x);
+bare_error bare_get_u32(struct bare_reader *ctx, uint32_t *x);
+bare_error bare_put_u64(struct bare_writer *ctx, uint64_t x);
+bare_error bare_get_u64(struct bare_reader *ctx, uint64_t *x);
+
+bare_error bare_put_int(struct bare_writer *ctx, int64_t x); /* varint */
+bare_error bare_get_int(struct bare_reader *ctx, int64_t *x); /* varint */
+bare_error bare_put_i8(struct bare_writer *ctx, int8_t x);
+bare_error bare_get_i8(struct bare_reader *ctx, int8_t *x);
+bare_error bare_put_i16(struct bare_writer *ctx, int16_t x);
+bare_error bare_get_i16(struct bare_reader *ctx, int16_t *x);
+bare_error bare_put_i32(struct bare_writer *ctx, int32_t x);
+bare_error bare_get_i32(struct bare_reader *ctx, int32_t *x);
+bare_error bare_put_i64(struct bare_writer *ctx, int64_t x);
+bare_error bare_get_i64(struct bare_reader *ctx, int64_t *x);
+
+bare_error bare_put_f32(struct bare_writer *ctx, float x);
+bare_error bare_get_f32(struct bare_reader *ctx, float *x);
+bare_error bare_put_f64(struct bare_writer *ctx, double x);
+bare_error bare_get_f64(struct bare_reader *ctx, double *x);
+
+bare_error bare_put_bool(struct bare_writer *ctx, bool x);
+bare_error bare_get_bool(struct bare_reader *ctx, bool *x);
+
+bare_error bare_put_fixed_data(struct bare_writer *ctx, uint8_t *src, uint64_t sz);
+bare_error bare_get_fixed_data(struct bare_reader *ctx, uint8_t *dst, uint64_t sz);
+bare_error bare_put_data(struct bare_writer *ctx, uint8_t *src, uint64_t sz);
+bare_error bare_get_data(struct bare_reader *ctx, uint8_t *dst, uint64_t sz);
+bare_error bare_put_str(struct bare_writer *ctx, char *src, uint64_t sz);
+bare_error bare_get_str(struct bare_reader *ctx, char *dst, uint64_t sz);
+
+#endif /* BARE_H */