Add two examples and prepare the build system for distribution.

git-svn-id: http://svn.pyyaml.org/libyaml/trunk@219 18f92427-320e-0410-9341-c67f048884a3

6 files changed, 1343 insertions, 5 deletions

diff --git a/include/yaml.h b/include/yaml.h
index 0408a67..47de95d 100644
--- a/include/yaml.h
+++ b/include/yaml.h
@@ -417,6 +417,7 @@ typedef struct {
  * Create the STREAM-START event.
  *
  * @param[in]   event       An empty event object.
+ * @param[in]   encoding    The stream encoding.
  *
  * @returns @c 1 if the function succeeded, @c 0 on error.
  */
@@ -508,7 +509,7 @@ yaml_alias_event_initialize(yaml_event_t *event, yaml_char_t *anchor);
 YAML_DECLARE(int)
 yaml_scalar_event_initialize(yaml_event_t *event,
         yaml_char_t *anchor, yaml_char_t *tag,
-        yaml_char_t *value, size_t length,
+        yaml_char_t *value, int length,
         int plain_implicit, int quoted_implicit,
         yaml_scalar_style_t style);
 
diff --git a/src/Makefile.am b/src/Makefile.am
index cc815e7..f9cb7a2 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,4 +1,4 @@
 AM_CPPFLAGS = -I$(top_srcdir)/include
 lib_LTLIBRARIES = libyaml.la
-libyaml_la_SOURCES = api.c reader.c scanner.c parser.c writer.c emitter.c
+libyaml_la_SOURCES = yaml_private.h api.c reader.c scanner.c parser.c writer.c emitter.c
 libyaml_la_LDFLAGS = -release $(YAML_LT_RELEASE) -version-info $(YAML_LT_CURRENT):$(YAML_LT_REVISION):$(YAML_LT_AGE)
diff --git a/src/api.c b/src/api.c
index dc7611d..83ca720 100644
--- a/src/api.c
+++ b/src/api.c
@@ -811,7 +811,7 @@ yaml_alias_event_initialize(yaml_event_t *event, yaml_char_t *anchor)
 YAML_DECLARE(int)
 yaml_scalar_event_initialize(yaml_event_t *event,
         yaml_char_t *anchor, yaml_char_t *tag,
-        yaml_char_t *value, size_t length,
+        yaml_char_t *value, int length,
         int plain_implicit, int quoted_implicit,
         yaml_scalar_style_t style)
 {
@@ -823,7 +823,6 @@ yaml_scalar_event_initialize(yaml_event_t *event,
     assert(event);      /* Non-NULL event object is expected. */
     assert(value);      /* Non-NULL anchor is expected. */
 
-
     if (anchor) {
         if (!yaml_check_utf8(anchor, strlen((char *)anchor))) goto error;
         anchor_copy = yaml_strdup(anchor);
@@ -836,6 +835,10 @@ yaml_scalar_event_initialize(yaml_event_t *event,
         if (!tag_copy) goto error;
     }
 
+    if (length < 0) {
+        length = strlen((char *)value);
+    }
+
     if (!yaml_check_utf8(value, length)) goto error;
     value_copy = yaml_malloc(length+1);
     if (!value_copy) goto error;
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 643e1eb..e7880d6 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1,4 +1,6 @@
 AM_CPPFLAGS = -I$(top_srcdir)/include
+AM_CFLAGS = -Wno-pointer-sign
 LDADD = $(top_builddir)/src/libyaml.la
 TESTS = test-version test-reader
-check_PROGRAMS = test-version test-reader run-scanner run-parser run-emitter
+check_PROGRAMS = test-version test-reader
+noinst_PROGRAMS = run-scanner run-parser run-emitter example-reformatter example-deconstructor
diff --git a/tests/example-deconstructor.c b/tests/example-deconstructor.c
new file mode 100644
index 0000000..d41b5ae
--- /dev/null
+++ b/tests/example-deconstructor.c
@@ -0,0 +1,1130 @@
+
+#include <yaml.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+
+int
+main(int argc, char *argv[])
+{
+    int help = 0;
+    int canonical = 0;
+    int unicode = 0;
+    int k;
+    int done = 0;
+
+    yaml_parser_t parser;
+    yaml_emitter_t emitter;
+    yaml_event_t input_event;
+    yaml_event_t output_event;
+
+    /* Clear the objects. */
+
+    memset(&parser, 0, sizeof(parser));
+    memset(&emitter, 0, sizeof(emitter));
+    memset(&input_event, 0, sizeof(input_event));
+    memset(&output_event, 0, sizeof(output_event));
+
+    /* Analyze command line options. */
+
+    for (k = 1; k < argc; k ++)
+    {
+        if (strcmp(argv[k], "-h") == 0
+                || strcmp(argv[k], "--help") == 0) {
+            help = 1;
+        }
+
+        else if (strcmp(argv[k], "-c") == 0
+                || strcmp(argv[k], "--canonical") == 0) {
+            canonical = 1;
+        }
+
+        else if (strcmp(argv[k], "-u") == 0
+                || strcmp(argv[k], "--unicode") == 0) {
+            unicode = 1;
+        }
+
+        else {
+            fprintf(stderr, "Unrecognized option: %s\n"
+                    "Try `%s --help` for more information.\n",
+                    argv[k], argv[0]);
+            return 1;
+        }
+    }
+
+    /* Display the help string. */
+
+    if (help)
+    {
+        printf("%s <input\n"
+                "or\n%s -h | --help\nDeconstruct a YAML stream\n\nOptions:\n"
+                "-h, --help\t\tdisplay this help and exit\n"
+                "-c, --canonical\t\toutput in the canonical YAML format\n"
+                "-u, --unicode\t\toutput unescaped non-ASCII characters\n",
+                argv[0], argv[0]);
+        return 0;
+    }
+
+    /* Initialize the parser and emitter objects. */
+
+    if (!yaml_parser_initialize(&parser)) {
+        fprintf(stderr, "Could not initialize the parser object\n");
+        return 1;
+    }
+
+    if (!yaml_emitter_initialize(&emitter)) {
+        yaml_parser_delete(&parser);
+        fprintf(stderr, "Could not inialize the emitter object\n");
+        return 1;
+    }
+
+    /* Set the parser parameters. */
+
+    yaml_parser_set_input_file(&parser, stdin);
+
+    /* Set the emitter parameters. */
+
+    yaml_emitter_set_output_file(&emitter, stdout);
+
+    yaml_emitter_set_canonical(&emitter, canonical);
+    yaml_emitter_set_unicode(&emitter, unicode);
+
+    /* Create and emit the STREAM-START event. */
+
+    if (!yaml_stream_start_event_initialize(&output_event, YAML_UTF8_ENCODING))
+        goto event_error;
+    if (!yaml_emitter_emit(&emitter, &output_event))
+        goto emitter_error;
+
+    /* Create and emit the DOCUMENT-START event. */
+
+    if (!yaml_document_start_event_initialize(&output_event,
+                NULL, NULL, NULL, 0))
+        goto event_error;
+    if (!yaml_emitter_emit(&emitter, &output_event))
+        goto emitter_error;
+
+    /* Create and emit the SEQUENCE-START event. */
+
+    if (!yaml_sequence_start_event_initialize(&output_event,
+                NULL, "tag:yaml.org,2002:seq", 1,
+                YAML_BLOCK_SEQUENCE_STYLE))
+        goto event_error;
+    if (!yaml_emitter_emit(&emitter, &output_event))
+        goto emitter_error;
+
+    /* Loop through the input events. */
+
+    while (!done)
+    {
+        /* Get the next event. */
+
+        if (!yaml_parser_parse(&parser, &input_event))
+            goto parser_error;
+
+        /* Check if this is the stream end. */
+
+        if (input_event.type == YAML_STREAM_END_EVENT) {
+            done = 1;
+        }
+
+        /* Create and emit a MAPPING-START event. */
+
+        if (!yaml_mapping_start_event_initialize(&output_event,
+                    NULL, "tag:yaml.org,2002:map", 1,
+                    YAML_BLOCK_MAPPING_STYLE))
+            goto event_error;
+        if (!yaml_emitter_emit(&emitter, &output_event))
+            goto emitter_error;
+
+        /* Analyze the event. */
+
+        switch (input_event.type)
+        {
+            case YAML_STREAM_START_EVENT:
+
+                /* Write 'type'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "type", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write 'STREAM-START'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "STREAM-START", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Display encoding information. */
+
+                if (input_event.data.stream_start.encoding)
+                {
+                    yaml_encoding_t encoding
+                        = input_event.data.stream_start.encoding;
+
+                    /* Write 'encoding'. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str", "encoding", -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+
+                    /* Write the stream encoding. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str",
+                                (encoding == YAML_UTF8_ENCODING ? "utf-8" :
+                                 encoding == YAML_UTF16LE_ENCODING ? "utf-16-le" :
+                                 encoding == YAML_UTF16BE_ENCODING ? "utf-16-be" :
+                                 "unknown"), -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+                }
+
+                break;
+
+            case YAML_STREAM_END_EVENT:
+
+                /* Write 'type'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "type", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write 'STREAM-END'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "STREAM-END", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                break;
+
+            case YAML_DOCUMENT_START_EVENT:
+
+                /* Write 'type'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "type", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write 'DOCUMENT-START'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "DOCUMENT-START", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Display the document version numbers. */
+
+                if (input_event.data.document_start.version_directive)
+                {
+                    yaml_version_directive_t *version
+                        = input_event.data.document_start.version_directive;
+                    char number[64];
+
+                    /* Write 'version'. */
+                    
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str", "version", -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+
+                    /* Write '{'. */
+
+                    if (!yaml_mapping_start_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:map", 1,
+                                YAML_FLOW_MAPPING_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+
+                    /* Write 'major'. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str", "major", -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+
+                    /* Write a number. */
+
+                    sprintf(number, "%d", version->major);
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:int", number, -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+
+                    /* Write 'minor'. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str", "minor", -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+
+                    /* Write a number. */
+
+                    sprintf(number, "%d", version->minor);
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:int", number, -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+
+                    /* Write '}'. */
+
+                    if (!yaml_mapping_end_event_initialize(&output_event))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+                }
+
+                /* Display the document tag directives. */
+
+                if (input_event.data.document_start.tag_directives.start
+                        != input_event.data.document_start.tag_directives.end)
+                {
+                    yaml_tag_directive_t *tag;
+
+                    /* Write 'tags'. */
+                    
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str", "tags", -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+
+                    /* Start a block sequence. */
+
+                    if (!yaml_sequence_start_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:seq", 1,
+                                YAML_BLOCK_SEQUENCE_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+
+                    for (tag = input_event.data.document_start.tag_directives.start;
+                            tag != input_event.data.document_start.tag_directives.end;
+                            tag ++)
+                    {
+                            /* Write '{'. */
+
+                            if (!yaml_mapping_start_event_initialize(&output_event,
+                                        NULL, "tag:yaml.org,2002:map", 1,
+                                        YAML_FLOW_MAPPING_STYLE))
+                                goto event_error;
+                            if (!yaml_emitter_emit(&emitter, &output_event))
+                                goto emitter_error;
+
+                            /* Write 'handle'. */
+
+                            if (!yaml_scalar_event_initialize(&output_event,
+                                        NULL, "tag:yaml.org,2002:str", "handle", -1,
+                                        1, 1, YAML_PLAIN_SCALAR_STYLE))
+                                goto event_error;
+                            if (!yaml_emitter_emit(&emitter, &output_event))
+                                goto emitter_error;
+
+                            /* Write the tag directive handle. */
+
+                            if (!yaml_scalar_event_initialize(&output_event,
+                                        NULL, "tag:yaml.org,2002:str",
+                                        tag->handle, -1,
+                                        0, 1, YAML_DOUBLE_QUOTED_SCALAR_STYLE))
+                                goto event_error;
+                            if (!yaml_emitter_emit(&emitter, &output_event))
+                                goto emitter_error;
+
+                            /* Write 'prefix'. */
+
+                            if (!yaml_scalar_event_initialize(&output_event,
+                                        NULL, "tag:yaml.org,2002:str", "prefix", -1,
+                                        1, 1, YAML_PLAIN_SCALAR_STYLE))
+                                goto event_error;
+                            if (!yaml_emitter_emit(&emitter, &output_event))
+                                goto emitter_error;
+
+                            /* Write the tag directive prefix. */
+
+                            if (!yaml_scalar_event_initialize(&output_event,
+                                        NULL, "tag:yaml.org,2002:str",
+                                        tag->prefix, -1,
+                                        0, 1, YAML_DOUBLE_QUOTED_SCALAR_STYLE))
+                                goto event_error;
+                            if (!yaml_emitter_emit(&emitter, &output_event))
+                                goto emitter_error;
+
+                            /* Write '}'. */
+
+                            if (!yaml_mapping_end_event_initialize(&output_event))
+                                goto event_error;
+                            if (!yaml_emitter_emit(&emitter, &output_event))
+                                goto emitter_error;
+                        }
+
+                        /* End a block sequence. */
+
+                        if (!yaml_sequence_end_event_initialize(&output_event))
+                            goto event_error;
+                        if (!yaml_emitter_emit(&emitter, &output_event))
+                            goto emitter_error;
+                }
+
+                /* Write 'implicit'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "implicit", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write if the document is implicit. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:bool",
+                            (input_event.data.document_start.implicit ?
+                             "true" : "false"), -1,
+                            1, 0, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                break;
+
+            case YAML_DOCUMENT_END_EVENT:
+
+                /* Write 'type'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "type", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write 'DOCUMENT-END'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "DOCUMENT-END", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write 'implicit'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "implicit", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write if the document is implicit. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:bool",
+                            (input_event.data.document_end.implicit ?
+                             "true" : "false"), -1,
+                            1, 0, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                break;
+
+            case YAML_ALIAS_EVENT:
+
+                /* Write 'type'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "type", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write 'ALIAS'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "ALIAS", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write 'anchor'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "anchor", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write the alias anchor. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str",
+                            input_event.data.alias.anchor, -1,
+                            0, 1, YAML_DOUBLE_QUOTED_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                break;
+
+            case YAML_SCALAR_EVENT:
+
+                /* Write 'type'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "type", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write 'SCALAR'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "SCALAR", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Display the scalar anchor. */
+
+                if (input_event.data.scalar.anchor)
+                {
+                    /* Write 'anchor'. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str", "anchor", -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+
+                    /* Write the scalar anchor. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str",
+                                input_event.data.scalar.anchor, -1,
+                                0, 1, YAML_DOUBLE_QUOTED_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+                }
+
+                /* Display the scalar tag. */
+
+                if (input_event.data.scalar.tag)
+                {
+                    /* Write 'tag'. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str", "tag", -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+
+                    /* Write the scalar tag. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str",
+                                input_event.data.scalar.tag, -1,
+                                0, 1, YAML_DOUBLE_QUOTED_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+                }
+
+                /* Display the scalar value. */
+
+                /* Write 'value'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "value", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write the scalar value. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str",
+                            input_event.data.scalar.value,
+                            input_event.data.scalar.length,
+                            0, 1, YAML_DOUBLE_QUOTED_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Display if the scalar tag is implicit. */
+
+                /* Write 'implicit'. */
+                
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "implicit", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write '{'. */
+
+                if (!yaml_mapping_start_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:map", 1,
+                            YAML_FLOW_MAPPING_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write 'plain'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "plain", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write if the scalar is implicit in the plain style. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:bool",
+                            (input_event.data.scalar.plain_implicit ?
+                             "true" : "false"), -1,
+                            1, 0, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write 'quoted'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "non-plain", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write if the scalar is implicit in a non-plain style. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:bool",
+                            (input_event.data.scalar.quoted_implicit ?
+                             "true" : "false"), -1,
+                            1, 0, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write '}'. */
+
+                if (!yaml_mapping_end_event_initialize(&output_event))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Display the style information. */
+
+                if (input_event.data.scalar.style)
+                {
+                    yaml_scalar_style_t style = input_event.data.scalar.style;
+
+                    /* Write 'style'. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str", "style", -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+
+                    /* Write the scalar style. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str",
+                                (style == YAML_PLAIN_SCALAR_STYLE ? "plain" :
+                                 style == YAML_SINGLE_QUOTED_SCALAR_STYLE ?
+                                        "single-quoted" :
+                                 style == YAML_DOUBLE_QUOTED_SCALAR_STYLE ?
+                                        "double-quoted" :
+                                 style == YAML_LITERAL_SCALAR_STYLE ? "literal" :
+                                 style == YAML_FOLDED_SCALAR_STYLE ? "folded" :
+                                 "unknown"), -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+                }
+
+                break;
+
+            case YAML_SEQUENCE_START_EVENT:
+
+                /* Write 'type'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "type", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write 'SEQUENCE-START'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "SEQUENCE-START", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Display the sequence anchor. */
+
+                if (input_event.data.sequence_start.anchor)
+                {
+                    /* Write 'anchor'. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str", "anchor", -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+
+                    /* Write the sequence anchor. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str",
+                                input_event.data.sequence_start.anchor, -1,
+                                0, 1, YAML_DOUBLE_QUOTED_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+                }
+
+                /* Display the sequence tag. */
+
+                if (input_event.data.sequence_start.tag)
+                {
+                    /* Write 'tag'. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str", "tag", -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+
+                    /* Write the sequence tag. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str",
+                                input_event.data.sequence_start.tag, -1,
+                                0, 1, YAML_DOUBLE_QUOTED_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+                }
+
+                /* Write 'implicit'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "implicit", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write if the sequence tag is implicit. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:bool",
+                            (input_event.data.sequence_start.implicit ?
+                             "true" : "false"), -1,
+                            1, 0, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Display the style information. */
+
+                if (input_event.data.sequence_start.style)
+                {
+                    yaml_sequence_style_t style
+                        = input_event.data.sequence_start.style;
+
+                    /* Write 'style'. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str", "style", -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+
+                    /* Write the scalar style. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str",
+                                (style == YAML_BLOCK_SEQUENCE_STYLE ? "block" :
+                                 style == YAML_FLOW_SEQUENCE_STYLE ? "flow" :
+                                 "unknown"), -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+                }
+
+                break;
+
+            case YAML_SEQUENCE_END_EVENT:
+
+                /* Write 'type'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "type", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write 'SEQUENCE-END'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "SEQUENCE-END", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                break;
+
+            case YAML_MAPPING_START_EVENT:
+
+                /* Write 'type'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "type", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write 'MAPPING-START'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "MAPPING-START", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Display the mapping anchor. */
+
+                if (input_event.data.mapping_start.anchor)
+                {
+                    /* Write 'anchor'. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str", "anchor", -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+
+                    /* Write the mapping anchor. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str",
+                                input_event.data.mapping_start.anchor, -1,
+                                0, 1, YAML_DOUBLE_QUOTED_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+                }
+
+                /* Display the mapping tag. */
+
+                if (input_event.data.mapping_start.tag)
+                {
+                    /* Write 'tag'. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str", "tag", -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+
+                    /* Write the mapping tag. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str",
+                                input_event.data.mapping_start.tag, -1,
+                                0, 1, YAML_DOUBLE_QUOTED_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+                }
+
+                /* Write 'implicit'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "implicit", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write if the mapping tag is implicit. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:bool",
+                            (input_event.data.mapping_start.implicit ?
+                             "true" : "false"), -1,
+                            1, 0, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Display the style information. */
+
+                if (input_event.data.mapping_start.style)
+                {
+                    yaml_mapping_style_t style
+                        = input_event.data.mapping_start.style;
+
+                    /* Write 'style'. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str", "style", -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+
+                    /* Write the scalar style. */
+
+                    if (!yaml_scalar_event_initialize(&output_event,
+                                NULL, "tag:yaml.org,2002:str",
+                                (style == YAML_BLOCK_MAPPING_STYLE ? "block" :
+                                 style == YAML_FLOW_MAPPING_STYLE ? "flow" :
+                                 "unknown"), -1,
+                                1, 1, YAML_PLAIN_SCALAR_STYLE))
+                        goto event_error;
+                    if (!yaml_emitter_emit(&emitter, &output_event))
+                        goto emitter_error;
+                }
+
+                break;
+
+            case YAML_MAPPING_END_EVENT:
+
+                /* Write 'type'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "type", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                /* Write 'MAPPING-END'. */
+
+                if (!yaml_scalar_event_initialize(&output_event,
+                            NULL, "tag:yaml.org,2002:str", "MAPPING-END", -1,
+                            1, 1, YAML_PLAIN_SCALAR_STYLE))
+                    goto event_error;
+                if (!yaml_emitter_emit(&emitter, &output_event))
+                    goto emitter_error;
+
+                break;
+
+            default:
+                /* It couldn't really happen. */
+                break;
+        }
+
+        /* Delete the event object. */
+
+        yaml_event_delete(&input_event);
+
+        /* Create and emit a MAPPING-END event. */
+
+        if (!yaml_mapping_end_event_initialize(&output_event))
+            goto event_error;
+        if (!yaml_emitter_emit(&emitter, &output_event))
+            goto emitter_error;
+    }
+
+    /* Create and emit the SEQUENCE-END event. */
+
+    if (!yaml_sequence_end_event_initialize(&output_event))
+        goto event_error;
+    if (!yaml_emitter_emit(&emitter, &output_event))
+        goto emitter_error;
+
+    /* Create and emit the DOCUMENT-END event. */
+
+    if (!yaml_document_end_event_initialize(&output_event, 0))
+        goto event_error;
+    if (!yaml_emitter_emit(&emitter, &output_event))
+        goto emitter_error;
+
+    /* Create and emit the STREAM-END event. */
+
+    if (!yaml_stream_end_event_initialize(&output_event))
+        goto event_error;
+    if (!yaml_emitter_emit(&emitter, &output_event))
+        goto emitter_error;
+
+    yaml_parser_delete(&parser);
+    yaml_emitter_delete(&emitter);
+
+    return 0;
+
+parser_error:
+
+    /* Display a parser error message. */
+
+    switch (parser.error)
+    {
+        case YAML_MEMORY_ERROR:
+            fprintf(stderr, "Memory error: Not enough memory for parsing\n");
+            break;
+
+        case YAML_READER_ERROR:
+            if (parser.problem_value != -1) {
+                fprintf(stderr, "Reader error: %s: #%X at %d\n", parser.problem,
+                        parser.problem_value, parser.problem_offset);
+            }
+            else {
+                fprintf(stderr, "Reader error: %s at %d\n", parser.problem,
+                        parser.problem_offset);
+            }
+            break;
+
+        case YAML_SCANNER_ERROR:
+            if (parser.context) {
+                fprintf(stderr, "Scanner error: %s at line %d, column %d\n"
+                        "%s at line %d, column %d\n", parser.context,
+                        parser.context_mark.line, parser.context_mark.column,
+                        parser.problem, parser.problem_mark.line,
+                        parser.problem_mark.column);
+            }
+            else {
+                fprintf(stderr, "Scanner error: %s at line %d, column %d\n",
+                        parser.problem, parser.problem_mark.line,
+                        parser.problem_mark.column);
+            }
+            break;
+
+        case YAML_PARSER_ERROR:
+            if (parser.context) {
+                fprintf(stderr, "Parser error: %s at line %d, column %d\n"
+                        "%s at line %d, column %d\n", parser.context,
+                        parser.context_mark.line, parser.context_mark.column,
+                        parser.problem, parser.problem_mark.line,
+                        parser.problem_mark.column);
+            }
+            else {
+                fprintf(stderr, "Parser error: %s at line %d, column %d\n",
+                        parser.problem, parser.problem_mark.line,
+                        parser.problem_mark.column);
+            }
+            break;
+
+        default:
+            /* Couldn't happen. */
+            fprintf(stderr, "Internal error\n");
+            break;
+    }
+
+    yaml_event_delete(&input_event);
+    yaml_event_delete(&output_event);
+    yaml_parser_delete(&parser);
+    yaml_emitter_delete(&emitter);
+
+    return 1;
+
+emitter_error:
+
+    /* Display an emitter error message. */
+
+    switch (emitter.error)
+    {
+        case YAML_MEMORY_ERROR:
+            fprintf(stderr, "Memory error: Not enough memory for emitting\n");
+            break;
+
+        case YAML_WRITER_ERROR:
+            fprintf(stderr, "Writer error: %s\n", emitter.problem);
+            break;
+
+        case YAML_EMITTER_ERROR:
+            fprintf(stderr, "Emitter error: %s\n", emitter.problem);
+            break;
+
+        default:
+            /* Couldn't happen. */
+            fprintf(stderr, "Internal error\n");
+            break;
+    }
+
+    yaml_event_delete(&input_event);
+    yaml_event_delete(&output_event);
+    yaml_parser_delete(&parser);
+    yaml_emitter_delete(&emitter);
+
+    return 1;
+
+event_error:
+
+    fprintf(stderr, "Memory error: Not enough memory for creating an event\n");
+
+    yaml_event_delete(&input_event);
+    yaml_event_delete(&output_event);
+    yaml_parser_delete(&parser);
+    yaml_emitter_delete(&emitter);
+
+    return 1;
+}
+
diff --git a/tests/example-reformatter.c b/tests/example-reformatter.c
new file mode 100644
index 0000000..a999fbe
--- /dev/null
+++ b/tests/example-reformatter.c
@@ -0,0 +1,202 @@
+
+#include <yaml.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+
+int
+main(int argc, char *argv[])
+{
+    int help = 0;
+    int canonical = 0;
+    int unicode = 0;
+    int k;
+    int done = 0;
+
+    yaml_parser_t parser;
+    yaml_emitter_t emitter;
+    yaml_event_t event;
+
+    /* Clear the objects. */
+
+    memset(&parser, 0, sizeof(parser));
+    memset(&emitter, 0, sizeof(emitter));
+    memset(&event, 0, sizeof(event));
+
+    /* Analyze command line options. */
+
+    for (k = 1; k < argc; k ++)
+    {
+        if (strcmp(argv[k], "-h") == 0
+                || strcmp(argv[k], "--help") == 0) {
+            help = 1;
+        }
+
+        else if (strcmp(argv[k], "-c") == 0
+                || strcmp(argv[k], "--canonical") == 0) {
+            canonical = 1;
+        }
+
+        else if (strcmp(argv[k], "-u") == 0
+                || strcmp(argv[k], "--unicode") == 0) {
+            unicode = 1;
+        }
+
+        else {
+            fprintf(stderr, "Unrecognized option: %s\n"
+                    "Try `%s --help` for more information.\n",
+                    argv[k], argv[0]);
+            return 1;
+        }
+    }
+
+    /* Display the help string. */
+
+    if (help)
+    {
+        printf("%s [--canonical] [--unicode] <input >output\n"
+                "or\n%s -h | --help\nReformat a YAML stream\n\nOptions:\n"
+                "-h, --help\t\tdisplay this help and exit\n"
+                "-c, --canonical\t\toutput in the canonical YAML format\n"
+                "-u, --unicode\t\toutput unescaped non-ASCII characters\n",
+                argv[0], argv[0]);
+        return 0;
+    }
+
+    /* Initialize the parser and emitter objects. */
+
+    if (!yaml_parser_initialize(&parser))
+        goto parser_error;
+
+    if (!yaml_emitter_initialize(&emitter))
+        goto emitter_error;
+
+    /* Set the parser parameters. */
+
+    yaml_parser_set_input_file(&parser, stdin);
+
+    /* Set the emitter parameters. */
+
+    yaml_emitter_set_output_file(&emitter, stdout);
+
+    yaml_emitter_set_canonical(&emitter, canonical);
+    yaml_emitter_set_unicode(&emitter, unicode);
+
+    /* The main loop. */
+
+    while (!done)
+    {
+        /* Get the next event. */
+
+        if (!yaml_parser_parse(&parser, &event))
+            goto parser_error;
+
+        /* Check if this is the stream end. */
+
+        if (event.type == YAML_STREAM_END_EVENT) {
+            done = 1;
+        }
+
+        /* Emit the event. */
+
+        if (!yaml_emitter_emit(&emitter, &event))
+            goto emitter_error;
+    }
+
+    yaml_parser_delete(&parser);
+    yaml_emitter_delete(&emitter);
+
+    return 0;
+
+parser_error:
+
+    /* Display a parser error message. */
+
+    switch (parser.error)
+    {
+        case YAML_MEMORY_ERROR:
+            fprintf(stderr, "Memory error: Not enough memory for parsing\n");
+            break;
+
+        case YAML_READER_ERROR:
+            if (parser.problem_value != -1) {
+                fprintf(stderr, "Reader error: %s: #%X at %d\n", parser.problem,
+                        parser.problem_value, parser.problem_offset);
+            }
+            else {
+                fprintf(stderr, "Reader error: %s at %d\n", parser.problem,
+                        parser.problem_offset);
+            }
+            break;
+
+        case YAML_SCANNER_ERROR:
+            if (parser.context) {
+                fprintf(stderr, "Scanner error: %s at line %d, column %d\n"
+                        "%s at line %d, column %d\n", parser.context,
+                        parser.context_mark.line, parser.context_mark.column,
+                        parser.problem, parser.problem_mark.line,
+                        parser.problem_mark.column);
+            }
+            else {
+                fprintf(stderr, "Scanner error: %s at line %d, column %d\n",
+                        parser.problem, parser.problem_mark.line,
+                        parser.problem_mark.column);
+            }
+            break;
+
+        case YAML_PARSER_ERROR:
+            if (parser.context) {
+                fprintf(stderr, "Parser error: %s at line %d, column %d\n"
+                        "%s at line %d, column %d\n", parser.context,
+                        parser.context_mark.line, parser.context_mark.column,
+                        parser.problem, parser.problem_mark.line,
+                        parser.problem_mark.column);
+            }
+            else {
+                fprintf(stderr, "Parser error: %s at line %d, column %d\n",
+                        parser.problem, parser.problem_mark.line,
+                        parser.problem_mark.column);
+            }
+            break;
+
+        default:
+            /* Couldn't happen. */
+            fprintf(stderr, "Internal error\n");
+            break;
+    }
+
+    yaml_parser_delete(&parser);
+    yaml_emitter_delete(&emitter);
+
+    return 1;
+
+emitter_error:
+
+    /* Display an emitter error message. */
+
+    switch (emitter.error)
+    {
+        case YAML_MEMORY_ERROR:
+            fprintf(stderr, "Memory error: Not enough memory for emitting\n");
+            break;
+
+        case YAML_WRITER_ERROR:
+            fprintf(stderr, "Writer error: %s\n", emitter.problem);
+            break;
+
+        case YAML_EMITTER_ERROR:
+            fprintf(stderr, "Emitter error: %s\n", emitter.problem);
+            break;
+
+        default:
+            /* Couldn't happen. */
+            fprintf(stderr, "Internal error\n");
+            break;
+    }
+
+    yaml_parser_delete(&parser);
+    yaml_emitter_delete(&emitter);
+
+    return 1;
+}
+