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diff --git a/src/csv_parser.h b/src/csv_parser.h
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+/**
+ * Copyright (C) 2013 Tadas Vilkeliskis <vilkeliskis.t@gmail.com>
+ *
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef CSV_PARSER_INCLUDE_GUARD_E95A7C4D_BE4A_49D1_8607_900F36DD25B8
+#define CSV_PARSER_INCLUDE_GUARD_E95A7C4D_BE4A_49D1_8607_900F36DD25B8
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+#include <sys/types.h>
+
+
+typedef enum csv_parser_state_t {
+    csvps_line_start = 0,
+    csvps_field_start,
+    csvps_field_value,
+    csvps_field_end,
+    csvps_line_end_begin,
+    csvps_line_end
+} csv_parser_state_t;
+
+
+typedef struct csv_parser_t {
+    csv_parser_state_t state;
+    /* csv row */
+    int row;
+    /* csv column */
+    int col;
+    uint32_t nread;
+    /* user data */
+    void *data;
+} csv_parser_t;
+
+
+/**
+ * Field callback interface.
+ *
+ * Field callback can be called multiple times for the same row and column.
+ * It's up to the user to construct full field value.
+ *
+ * Return 0 value on success, anything else on error.
+ */
+typedef int (*csv_parser_field_calback_t)(csv_parser_t *parser,
+                                          const char *data,
+                                          size_t length,
+                                          int row,
+                                          int col);
+
+
+typedef struct csv_parser_settings_t {
+    char delimiter;
+    csv_parser_field_calback_t field_cb;
+} csv_parser_settings_t;
+
+
+void csv_parser_init(csv_parser_t *parser);
+
+/**
+ * Executes CSV parser on the given data. Returns number
+ * of bytes read.
+ */
+size_t csv_parser_execute(csv_parser_t *parser,
+                          const csv_parser_settings_t *settings,
+                          const char *data,
+                          size_t data_len);
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* end of include guard */