X-Git-Url: https://plomlompom.com/repos/foo.html?a=blobdiff_plain;ds=inline;f=src%2Fcommon%2Freadwrite.c;fp=src%2Fcommon%2Freadwrite.c;h=43c83e9923710cd1400ce1fc10eae90ded692df0;hb=2b2a1e0169b3a863fd87b679d789a4e2b789eb67;hp=6c7d7d60c7e8887ee5b2b239e5d34868f3e75baf;hpb=cdd22bc79aafb8261af4785f58425d8535e57a5b;p=plomrogue
diff --git a/src/common/readwrite.c b/src/common/readwrite.c
index 6c7d7d6..43c83e9 100644
--- a/src/common/readwrite.c
+++ b/src/common/readwrite.c
@@ -6,13 +6,13 @@
*/
#include "readwrite.h"
-#include /* size_t */
+#include /* NULL, size_t */
#include /* uint8_t, uint16_t, uint32_t, UINT32_MAX */
#include /* FILE, fseek(), sprintf(), fgets(), fgetc(), ferror(),
* fputc(), fwrite(), fclose(), fopen(), clearerr()
*/
#include /* free() */
-#include /* strlen() */
+#include /* strlen(), memcpy() */
#include /* access(), unlink() */
#include "rexit.h" /* exit_err(), exit_trouble() */
#include "try_malloc.h" /* try_malloc() */
@@ -180,3 +180,80 @@ extern uint32_t textfile_width(FILE * file)
exit_trouble(-1 == fseek(file, 0, SEEK_SET), __func__, "fseek");
return linemax;
}
+
+
+
+extern uint8_t read_file_into_queue(FILE * file, char ** queue,
+ uint32_t * queue_size)
+{
+ int test = try_fgetc(file, __func__);
+ if (EOF != test)
+ {
+ do
+ {
+ char c = (char) test;
+ if ('\n' == c)
+ {
+ c = '\0';
+ }
+ char * new_queue = try_malloc(*queue_size + 1, __func__);
+ memcpy(new_queue, *queue, *queue_size);
+ char * new_pos = new_queue + *queue_size;
+ * new_pos = c;
+ *queue_size = *queue_size + 1;
+ free(*queue);
+ *queue = new_queue;
+ }
+ while (EOF != (test = try_fgetc(file, __func__)));
+ if (*queue_size && '\0' != (*queue)[*queue_size - 1])
+ {
+ char * new_queue = try_malloc(*queue_size + 1, __func__);
+ memcpy(new_queue, *queue, *queue_size);
+ new_queue[*queue_size] = '\0';
+ *queue_size = *queue_size + 1;
+ free(*queue);
+ *queue = new_queue;
+ }
+ return 1;
+ }
+ return 0;
+}
+
+
+
+extern char * get_message_from_queue(char ** queue, uint32_t * queue_size)
+{
+ char * message = NULL;
+ if (*queue_size)
+ {
+ size_t cutout_len = strlen(*queue);
+ uint8_t is_nullbyte_chunk = !cutout_len;
+ if (0 < cutout_len)
+ {
+ cutout_len++;
+ message = try_malloc(cutout_len, __func__);
+ memcpy(message, *queue, cutout_len);
+ }
+ for (;
+ cutout_len != *queue_size && '\0' == (*queue)[cutout_len];
+ cutout_len++);
+ *queue_size = *queue_size - cutout_len;
+ if (0 == *queue_size)
+ {
+ free(*queue); /* NULL so read_file_into_queue() and */
+ *queue = NULL; /* cleanup() may free() this every time, */
+ } /* even when it's un-allocated. */
+ else
+ {
+ char * new_queue = try_malloc(*queue_size, __func__);
+ memcpy(new_queue, &((*queue)[cutout_len]), *queue_size);
+ free(*queue);
+ *queue = new_queue;
+ if (is_nullbyte_chunk)
+ {
+ return get_message_from_queue(queue, queue_size);
+ }
+ }
+ }
+ return message;
+}