From 9a8e06aa5bdc62ed589bd8ed5789bd059cec0700 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Sun, 16 Aug 2020 12:42:58 +0200
Subject: Simplify reader interface

---
 src/reader.c | 124 ++++++++++++++++++++---------------------------------------
 1 file changed, 41 insertions(+), 83 deletions(-)

(limited to 'src/reader.c')

diff --git a/src/reader.c b/src/reader.c
index 6e814d93..194c295b 100644
--- a/src/reader.c
+++ b/src/reader.c
@@ -23,11 +23,13 @@
 
 #include <errno.h>
 #include <stdarg.h>
-#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
+static SerdStatus
+serd_reader_prepare(SerdReader* reader);
+
 SerdStatus
 r_err(SerdReader* reader, SerdStatus st, const char* fmt, ...)
 {
@@ -65,22 +67,6 @@ blank_id(SerdReader* reader)
   return ref;
 }
 
-/** fread-like wrapper for getc (which is faster). */
-static size_t
-serd_file_read_byte(void* buf, size_t size, size_t nmemb, void* stream)
-{
-  (void)size;
-  (void)nmemb;
-
-  const int c = getc((FILE*)stream);
-  if (c == EOF) {
-    *((uint8_t*)buf) = 0;
-    return 0;
-  }
-  *((uint8_t*)buf) = (uint8_t)c;
-  return 1;
-}
-
 Ref
 push_node_padded(SerdReader*  reader,
                  size_t       maxlen,
@@ -165,9 +151,16 @@ read_statement(SerdReader* reader)
   return read_n3_statement(reader);
 }
 
-static SerdStatus
-read_doc(SerdReader* reader)
+SerdStatus
+serd_reader_read_document(SerdReader* reader)
 {
+  if (!reader->source.prepared) {
+    SerdStatus st = serd_reader_prepare(reader);
+    if (st) {
+      return st;
+    }
+  }
+
   return ((reader->syntax == SERD_NQUADS) ? read_nquadsDoc(reader)
                                           : read_turtleTrigDoc(reader));
 }
@@ -281,10 +274,23 @@ serd_reader_read_file(SerdReader* reader, const char* uri)
     return SERD_ERR_UNKNOWN;
   }
 
-  SerdStatus ret = serd_reader_read_file_handle(reader, fd, path);
+  SerdStatus st = serd_reader_start_stream(reader,
+                                           (SerdSource)fread,
+                                           (SerdStreamErrorFunc)ferror,
+                                           fd,
+                                           path,
+                                           SERD_PAGE_SIZE);
+
+  if (!st) {
+    st = serd_reader_read_document(reader);
+  }
+
+  const SerdStatus est = serd_reader_end_stream(reader);
+
   fclose(fd);
   free(path);
-  return ret;
+
+  return st ? st : est;
 }
 
 static SerdStatus
@@ -305,30 +311,21 @@ skip_bom(SerdReader* me)
 }
 
 SerdStatus
-serd_reader_start_stream(SerdReader* reader,
-                         FILE*       file,
-                         const char* name,
-                         bool        bulk)
+serd_reader_start_stream(SerdReader*         reader,
+                         SerdSource          read_func,
+                         SerdStreamErrorFunc error_func,
+                         void*               stream,
+                         const char*         name,
+                         size_t              page_size)
 {
-  return serd_reader_start_source_stream(reader,
-                                         bulk ? (SerdSource)fread
-                                              : serd_file_read_byte,
-                                         (SerdStreamErrorFunc)ferror,
-                                         file,
-                                         name,
-                                         bulk ? SERD_PAGE_SIZE : 1);
+  return serd_byte_source_open_source(
+    &reader->source, read_func, error_func, stream, name, page_size);
 }
 
 SerdStatus
-serd_reader_start_source_stream(SerdReader*         reader,
-                                SerdSource          read_func,
-                                SerdStreamErrorFunc error_func,
-                                void*               stream,
-                                const char*         name,
-                                size_t              page_size)
+serd_reader_start_string(SerdReader* reader, const char* utf8)
 {
-  return serd_byte_source_open_source(
-    &reader->source, read_func, error_func, stream, name, page_size);
+  return serd_byte_source_open_string(&reader->source, utf8);
 }
 
 static SerdStatus
@@ -369,52 +366,13 @@ serd_reader_end_stream(SerdReader* reader)
   return serd_byte_source_close(&reader->source);
 }
 
-SerdStatus
-serd_reader_read_file_handle(SerdReader* reader, FILE* file, const char* name)
-{
-  return serd_reader_read_source(reader,
-                                 (SerdSource)fread,
-                                 (SerdStreamErrorFunc)ferror,
-                                 file,
-                                 name,
-                                 SERD_PAGE_SIZE);
-}
-
-SerdStatus
-serd_reader_read_source(SerdReader*         reader,
-                        SerdSource          source,
-                        SerdStreamErrorFunc error,
-                        void*               stream,
-                        const char*         name,
-                        size_t              page_size)
-{
-  SerdStatus st = serd_reader_start_source_stream(
-    reader, source, error, stream, name, page_size);
-
-  if (st || (st = serd_reader_prepare(reader))) {
-    serd_reader_end_stream(reader);
-    return st;
-  }
-
-  if ((st = read_doc(reader))) {
-    serd_reader_end_stream(reader);
-    return st;
-  }
-
-  return serd_reader_end_stream(reader);
-}
-
 SerdStatus
 serd_reader_read_string(SerdReader* reader, const char* utf8)
 {
-  serd_byte_source_open_string(&reader->source, utf8);
+  serd_reader_start_string(reader, utf8);
 
-  SerdStatus st = serd_reader_prepare(reader);
-  if (!st) {
-    st = read_doc(reader);
-  }
+  const SerdStatus st  = serd_reader_read_document(reader);
+  const SerdStatus est = serd_byte_source_close(&reader->source);
 
-  serd_byte_source_close(&reader->source);
-
-  return st;
+  return st ? st : est;
 }
-- 
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