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authorDavid Robillard <d@drobilla.net>2018-02-04 12:09:42 +0100
committerDavid Robillard <d@drobilla.net>2018-02-04 12:10:25 +0100
commit930b2bd2fb6e8739e71ad2c503087ae675ffe194 (patch)
tree9cd87819d32e00b13e25a09db62dd9c915f070ca /src/reader.h
parenta8e18669390fb852a55c443f71968af92f7efd6d (diff)
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Factor out syntax-specific reader implementation
Diffstat (limited to 'src/reader.h')
-rw-r--r--src/reader.h86
1 files changed, 86 insertions, 0 deletions
diff --git a/src/reader.h b/src/reader.h
new file mode 100644
index 00000000..723a1c5a
--- /dev/null
+++ b/src/reader.h
@@ -0,0 +1,86 @@
+/*
+ Copyright 2011-2017 David Robillard <http://drobilla.net>
+
+ Permission to use, copy, modify, and/or distribute this software for any
+ purpose with or without fee is hereby granted, provided that the above
+ copyright notice and this permission notice appear in all copies.
+
+ THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "serd_internal.h"
+
+static inline uint8_t
+peek_byte(SerdReader* reader)
+{
+ return serd_byte_source_peek(&reader->source);
+}
+
+static inline uint8_t
+eat_byte(SerdReader* reader)
+{
+ const uint8_t c = peek_byte(reader);
+ const SerdStatus st = serd_byte_source_advance(&reader->source);
+ if (st) {
+ reader->status = st;
+ }
+ return c;
+}
+
+static inline uint8_t
+eat_byte_safe(SerdReader* reader, const uint8_t byte)
+{
+ const uint8_t c = eat_byte(reader);
+ assert(c == byte);
+ return c;
+}
+
+static inline uint8_t
+eat_byte_check(SerdReader* reader, const uint8_t byte)
+{
+ const uint8_t c = peek_byte(reader);
+ if (c != byte) {
+ return r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "expected `%c', not `%c'\n", byte, c);
+ }
+ return eat_byte_safe(reader, byte);
+}
+
+static inline bool
+eat_string(SerdReader* reader, const char* str, unsigned n)
+{
+ bool bad = false;
+ for (unsigned i = 0; i < n; ++i) {
+ bad |= (bool)eat_byte_check(reader, ((const uint8_t*)str)[i]);
+ }
+ return bad;
+}
+
+static inline SerdStatus
+push_byte(SerdReader* reader, Ref ref, const uint8_t c)
+{
+ SERD_STACK_ASSERT_TOP(reader, ref);
+ uint8_t* const s = serd_stack_push(&reader->stack, 1);
+ SerdNode* const node = (SerdNode*)(reader->stack.buf + ref);
+ ++node->n_bytes;
+ if (!(c & 0x80)) { // Starts with 0 bit, start of new character
+ ++node->n_chars;
+ }
+ *(s - 1) = c;
+ *s = '\0';
+ return SERD_SUCCESS;
+}
+
+static inline void
+push_bytes(SerdReader* reader, Ref ref, const uint8_t* bytes, unsigned len)
+{
+ for (unsigned i = 0; i < len; ++i) {
+ push_byte(reader, ref, bytes[i]);
+ }
+}