Add API reference in documentation.

doc/ctlseqs.texi

@@ -361,6 +361,76 @@ const char *patterns[] = @{
 @node API Reference
 @appendix API Reference
 
+This appendix section contains a complete list of functions exposed by ctlseqs,
+which is meant for a TL;DR purpose. See the corresponding man(3) pages for
+concise details.
+
+Initialize matcher:
+
+@example
+struct ctlseqs_matcher *ctlseqs_matcher_init(void);
+@end example
+
+Configure matcher:
+
+@example
+int ctlseqs_matcher_config(
+    struct ctlseqs_matcher               *matcher,
+    struct ctlseqs_matcher_options const *options);
+@end example
+
+Match string:
+
+@example
+ssize_t ctlseqs_match(
+    struct ctlseqs_reader const *matcher,
+    char const                  *str,
+    size_t                       str_len,
+    union ctlseqs_value         *result);
+@end example
+
+Destroy matcher:
+
+@example
+void ctlseqs_matcher_free(struct ctlseqs_matcher *matcher);
+@end example
+
+Initialize reader:
+
+@example
+struct ctlseqs_reader *ctlseqs_reader_init(void);
+@end example
+
+Configure reader:
+
+@example
+int ctlseqs_reader_config(
+    struct ctlseqs_reader               *reader,
+    struct ctlseqs_reader_options const *options);
+@end example
+
+Read and match:
+
+@example
+ssize_t ctlseqs_read(
+    struct ctlseqs_reader        *reader,
+    struct ctlseqs_matcher const *matcher,
+    int                           timeout);
+@end example
+
+Purge reader:
+
+@example
+void ctlseqs_purge(
+    struct ctlseqs_reader *reader,
+    size_t                 nbytes);
+@end example
+
+Destroy reader:
+
+@example
+void ctlseqs_reader_free(struct ctlseqs_reader *reader);
+@end example
 
 @node GNU Free Documentation License
 @appendix GNU Free Documentation License