first draft

1 files changed, 106 insertions, 0 deletions

diff --git a/contrib/csv-tutorial.c b/contrib/csv-tutorial.c
new file mode 100644
index 0000000..9bdb7e6
--- /dev/null
+++ b/contrib/csv-tutorial.c
@@ -0,0 +1,106 @@
+#include <setjmp.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "csv.h"
+
+bool
+processFile(const char *filename)
+{
+        FILE *in = fopen(filename, "r");
+
+        if ( in == NULL ) {
+                return false;
+        }
+
+        csv_t csv;
+        csv_init(&csv);
+
+        while ( csv_read(&csv, in) ) {
+                const size_t nfields = csv_nfields(&csv);
+                // ...
+        }
+        csv_cleanup(&csv);
+
+        (void) fclose(in);
+        return true;
+}
+
+bool
+processFile_options(const char *filename)
+{
+        FILE *in = fopen(filename, "r");
+
+        if ( in == NULL ) {
+                return false;
+        }
+
+        csv_options_t csv_options   = csv_default_options;
+        csv_options.field_delimiter = '"';
+        csv_options.field_separator = ',';
+
+        csv_t csv;
+        csv_init_opt(&csv, &csv_options);
+
+        while ( csv_read(&csv, in) ) {
+                const size_t nfields = csv_nfields(&csv);
+                // ...
+        }
+        csv_cleanup(&csv);
+
+        (void) fclose(in);
+        return true;
+}
+
+static void
+csvErrorHandler(csv_err_t err, void *cb_arg)
+{
+        longjmp(*((jmp_buf *) cb_arg), err);
+}
+
+bool
+processFile_error(const char *filename)
+{
+        FILE *in = fopen(filename, "r");
+
+        if ( in == NULL ) {
+                return false;
+        }
+
+        csv_options_t csv_options   = csv_default_options;
+        csv_options.field_delimiter = '"';
+        csv_options.field_separator = ',';
+
+        jmp_buf env;
+        csv_options.cb_error     = csvErrorHandler;
+        csv_options.cb_error_arg = &env;
+
+        csv_t csv;
+        csv_init_opt(&csv, &csv_options);
+
+        switch ( setjmp(env) ) {
+        case CSV_ERR_OK:
+                while ( csv_read(&csv, in) ) {
+                        const size_t nfields = csv_nfields(&csv);
+                        // ...
+                }
+                break;
+
+        case CSV_ERR_OUT_OF_MEMORY:
+        case CSV_ERR_OUT_OF_RANGE:
+        case CSV_ERR_IO_READ:
+        case CSV_ERR_IO_WRITE:
+                csv_cleanup(&csv);
+                break;
+        }
+
+        (void) fclose(in);
+        return true;
+}
+
+int
+main(void)
+{
+        return EXIT_SUCCESS;
+}