5 files changed, 212 insertions, 0 deletions
diff --git a/src/file/data_input.c b/src/file/data_input.c
new file mode 100644
index 0000000..e31d33b
--- /dev/null
+++ b/src/file/data_input.c
@@ -0,0 +1,98 @@
+#define _POSIX_C_SOURCE 200809L
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h> /* defines SIZE_MAX */
+
+#include "error.h"
+
+#include "data_input.h"
+
+int ZoO_data_input_open
+(
+   struct ZoO_data_input di [const static 1],
+   const char filename [const restrict static 1]
+)
+{
+   /* prevents di [restrict] */
+   ZoO_strings_initialize(&(di->string));
+
+   di->file = fopen(filename, "r");
+
+   if (di->file == (FILE *) NULL)
+   {
+      ZoO_ERROR
+      (
+         "Could not open file '%s' in readonly mode.",
+         filename
+      );
+
+      return -1;
+   }
+
+   return 0;
+}
+
+int ZoO_data_input_read_line
+(
+   struct ZoO_data_input di [const static 1],
+   ZoO_index const punctuations_count,
+   const ZoO_char punctuations [const restrict static punctuations_count]
+)
+{
+   size_t line_size, i, w_start;
+   ZoO_char * line;
+
+   /* prevents di [restrict] */
+   ZoO_strings_finalize(&(di->string));
+
+   line = (ZoO_char *) NULL;
+   line_size = 0;
+
+   /* XXX: assumed compatible with ZoO_char */
+
+   if (getline(&line, &line_size, di->file) < 1)
+   {
+      free((void *) line);
+
+      return -1;
+   }
+
+   line_size = strlen(line);
+   line[line_size - 1] = '\0';
+
+   --line_size; /* removed '\n' */
+
+   if
+   (
+      ZoO_strings_parse
+      (
+         &(di->string),
+         line_size,
+         line,
+         punctuations_count,
+         punctuations
+      ) < 0
+   )
+   {
+      free((void *) line);
+
+      return -1;
+   }
+
+   free((void *) line);
+
+   return 0;
+}
+
+void ZoO_data_input_close (struct ZoO_data_input di [const static 1])
+{
+   if (di->file != (FILE *) NULL)
+   {
+      fclose(di->file);
+
+      di->file = (FILE *) NULL;
+   }
+
+   /* prevents di [restrict] */
+   ZoO_strings_finalize(&(di->string));
+}
diff --git a/src/file/data_input.h b/src/file/data_input.h
new file mode 100644
index 0000000..a2f004b
--- /dev/null
+++ b/src/file/data_input.h
@@ -0,0 +1,21 @@
+#ifndef _ZoO_IO_DATA_INPUT_H_
+#define _ZoO_IO_DATA_INPUT_H_
+
+#include "data_input_types.h"
+
+int ZoO_data_input_open
+(
+   struct ZoO_data_input di [const static 1],
+   const char filename [const restrict static 1]
+);
+
+int ZoO_data_input_read_line
+(
+   struct ZoO_data_input di [const static 1],
+   ZoO_index const punctuations_count,
+   const ZoO_char punctuations [const restrict static punctuations_count]
+);
+
+void ZoO_data_input_close (struct ZoO_data_input di [const static 1]);
+
+#endif
diff --git a/src/file/data_input_types.h b/src/file/data_input_types.h
new file mode 100644
index 0000000..bd2709b
--- /dev/null
+++ b/src/file/data_input_types.h
@@ -0,0 +1,16 @@
+#ifndef _ZoO_IO_DATA_INPUT_TYPES_H_
+#define _ZoO_IO_DATA_INPUT_TYPES_H_
+
+#include <stdio.h>
+
+#include "../pervasive.h"
+
+#include "../tool/strings.h"
+
+struct ZoO_data_input
+{
+   FILE * restrict file;
+   struct ZoO_strings string;
+};
+
+#endif
diff --git a/src/file/data_output.c b/src/file/data_output.c
new file mode 100644
index 0000000..04e3964
--- /dev/null
+++ b/src/file/data_output.c
@@ -0,0 +1,66 @@
+#define _POSIX_C_SOURCE 200809L
+
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <stdint.h> /* defines SIZE_MAX */
+#include <stdio.h>
+
+#include "error.h"
+
+#include "data_output.h"
+
+int ZoO_data_output_write_line
+(
+   const char filename [const restrict static 1],
+   char line [const restrict static 1],
+   size_t const line_size
+)
+{
+   const int old_errno = errno;
+   FILE * file;
+
+   file = fopen(filename, "a");
+
+   if (file == (FILE *) NULL)
+   {
+      ZoO_ERROR
+      (
+         "Could not open file '%s' in appending mode.",
+         filename
+      );
+
+      return -1;
+   }
+
+   line[line_size - 1] = '\n';
+
+   if
+   (
+      fwrite
+      (
+         (const void *) line,
+         sizeof(char),
+         line_size,
+         file
+      ) < line_size
+   )
+   {
+      line[line_size - 1] = '\0';
+
+      ZoO_ERROR
+      (
+         "Could not store line '%s' in %s.",
+         line,
+         filename
+      );
+
+      fclose(file);
+
+      return -1;
+   }
+
+   fclose(file);
+
+   return 0;
+}
diff --git a/src/file/data_output.h b/src/file/data_output.h
new file mode 100644
index 0000000..ef963a0
--- /dev/null
+++ b/src/file/data_output.h
@@ -0,0 +1,11 @@
+#ifndef _ZoO_IO_DATA_OUTPUT_H_
+#define _ZoO_IO_DATA_OUTPUT_H_
+
+int ZoO_data_output_write_line
+(
+   const char filename [const restrict static 1],
+   char line [const restrict static 1],
+   size_t const line_size
+);
+
+#endif