Adds the current code.

It's been running for close to a month on one of the IRC channels I
frequent and seems to be working fine.
One should be aware that, among other missing features, this version
does not store permanently what the bot learns. Indeed, I am currently
using a file with 431848 lines as its initial knowledge bank, making
this particular feature not a high priority one.
Also consider the fact that Zero of One converts text to underscore
before reading it but will not change its own aliases. This could
potentially be a cause for surprises when using uppercase letters in the
latter.

1 files changed, 98 insertions, 0 deletions

diff --git a/src/io/data_input.c b/src/io/data_input.c
new file mode 100644
index 0000000..e31d33b
--- /dev/null
+++ b/src/io/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));
+}