Add example for guessing parser from content in files

2 files changed, 81 insertions, 1 deletions

diff --git a/examples/Makefile.am b/examples/Makefile.am
index c3a60375..91c15244 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -21,7 +21,7 @@
 # 
 # 
 
-EXTRA_PROGRAMS = raptor_abort grapper rdfcat rdfprint rdfserialize
+EXTRA_PROGRAMS = raptor_abort grapper rdfcat rdfprint rdfserialize rdfguess
 
 examples: $(EXTRA_PROGRAMS)
 
@@ -53,6 +53,10 @@ rdfserialize_SOURCES = rdfserialize.c
 rdfserialize_LDADD=$(top_builddir)/src/libraptor2.la
 rdfserialize_DEPENDENCIES = $(top_builddir)/src/libraptor2.la
 
+rdfguess_SOURCES = rdfguess.c
+rdfguess_LDADD=$(top_builddir)/src/libraptor2.la
+rdfguess_DEPENDENCIES = $(top_builddir)/src/libraptor2.la
+
 
 $(top_builddir)/src/libraptor2.la:
 	cd $(top_builddir)/src && $(MAKE) libraptor2.la
diff --git a/examples/rdfguess.c b/examples/rdfguess.c
new file mode 100644
index 00000000..7875cb8f
--- /dev/null
+++ b/examples/rdfguess.c
@@ -0,0 +1,76 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <raptor.h>
+
+
+/* rdfguess.c: guess parser name from filename and its content */
+
+#define READ_BUFFER_SIZE 256
+
+int
+main(int argc, char *argv[])
+{
+  raptor_world *world = NULL;
+  char *buffer[READ_BUFFER_SIZE];
+  const char *filename;
+  int rc = 1;
+  int i;
+  
+  world = raptor_new_world();
+
+  if(argc < 2) {
+    fprintf(stderr, "USAGE rdfguess: FILENAMES...\n");
+    goto tidy;
+  }
+  
+  for(i = 1; (filename = (const char*)argv[1]); i++) {
+    raptor_iostream* iostr = NULL;
+    const char* name;
+    size_t read_len;
+    size_t count;
+
+    if(access(filename, R_OK)) {
+      fprintf(stderr, "rdfguess: %s not found\n", filename);
+      goto tidy;
+    }
+
+    iostr = raptor_new_iostream_from_filename(world, filename);
+    if(!iostr) {
+      fprintf(stderr, "rdfguess: Could not create iostream for %s\n", filename);
+      goto tidy;
+    }
+
+    read_len = READ_BUFFER_SIZE;
+    count = raptor_iostream_read_bytes(buffer, 1, read_len, iostr);
+    if(count < 1) {
+      fprintf(stderr, "rdfguess: Failed to read any data from file %s\n",
+              filename);
+      goto tidy;
+    }
+
+
+    name = raptor_world_guess_parser_name(world,
+                                          /* uri*/ NULL,
+                                          /* mime_type */ NULL,
+                                          (const unsigned char*)buffer,
+                                          read_len, 
+                                          /* identifier */ (const unsigned char *)filename);
+
+    if(name)
+      fprintf(stdout, "rdfguess: %s guessed to be %s\n", filename, name);
+    else
+      fprintf(stdout, "rdfguess: failed to guess parser\n");
+  }
+  
+  rc = 0;
+
+  tidy:
+  if(iostr)
+    raptor_free_iostream(iostr);
+  
+  raptor_free_world(world);
+
+  return rc;
+}