-/* src/common/readwrite.c */
+/* src/common/readwrite.c
+ *
+ * This file is part of PlomRogue. PlomRogue is licensed under the GPL version 3
+ * or any later version. For details on its copyright, license, and warranties,
+ * see the file NOTICE in the root directory of the PlomRogue source package.
+ */
#include "readwrite.h"
-#include <stddef.h> /* size_t */
+#include <stddef.h> /* NULL, size_t */
#include <stdint.h> /* uint8_t, uint16_t, uint32_t, UINT32_MAX */
#include <stdio.h> /* FILE, fseek(), sprintf(), fgets(), fgetc(), ferror(),
* fputc(), fwrite(), fclose(), fopen(), clearerr()
*/
#include <stdlib.h> /* free() */
-#include <string.h> /* strlen() */
+#include <string.h> /* strlen(), memcpy(), strchr() */
#include <unistd.h> /* access(), unlink() */
#include "rexit.h" /* exit_err(), exit_trouble() */
#include "try_malloc.h" /* try_malloc() */
-/* Return "path" + suffix "_tmp". Value is malloc'd, must be free externally. */
-static char * build_temp_path(char * path);
-
-
-
-static char * build_temp_path(char * path)
-{
- char * suffix_tmp = "_tmp";
- uint16_t size = strlen(path) + strlen(suffix_tmp) + 1;
- char * path_tmp = try_malloc(size, __func__);
- int test = sprintf(path_tmp, "%s%s", path, suffix_tmp);
- exit_trouble(test < 0, __func__, "sprintf");
- return path_tmp;
-}
-
-
-
extern FILE * try_fopen(char * path, char * mode, const char * f)
{
char * msg1 = "Trouble in ";
int test = sprintf(msg, "%s%s%s%s%s%s%s", msg1,f,msg2,mode,msg3,path,msg4);
exit_trouble(test < 0, __func__, "sprintf");
FILE * file_p = fopen(path, mode);
- exit_err(NULL == file_p, msg);
+ exit_err(!file_p, msg);
free(msg);
return file_p;
}
extern char * try_fgets(char * line, int linemax, FILE * file, const char * f)
{
char * test = fgets(line, linemax, file);
- exit_trouble(NULL == test && ferror(file), f, "fgets");
+ exit_trouble(!test && ferror(file), f, "fgets");
return test;
}
+extern char * build_temp_path(char * path)
+{
+ char * suffix_tmp = "_tmp";
+ uint16_t size = strlen(path) + strlen(suffix_tmp) + 1;
+ char * path_tmp = try_malloc(size, __func__);
+ int test = sprintf(path_tmp, "%s%s", path, suffix_tmp);
+ exit_trouble(test < 0, __func__, "sprintf");
+ return path_tmp;
+}
+
+
+
extern FILE * atomic_write_start(char * path, char ** path_tmp)
{
*path_tmp = build_temp_path(path);
exit_trouble(-1 == fseek(file, 0, SEEK_SET), __func__, "fseek");
return linemax;
}
+
+
+
+extern uint8_t read_file_into_queue(FILE * file, char ** queue)
+{
+ uint8_t ret = 0;
+ int test;
+ while (EOF != (test = try_fgetc(file, __func__)))
+ {
+ ret = 1;
+ if ('\0' != test)
+ {
+ if (*queue)
+ {
+ char * new_queue = try_malloc(strlen(*queue) + 1 + 1, __func__);
+ memcpy(new_queue, *queue, strlen(*queue));
+ new_queue[strlen(*queue)] = (char) test;
+ new_queue[strlen(*queue) + 1] = '\0';
+ free(*queue);
+ *queue = new_queue;
+ }
+ else
+ {
+ *queue = try_malloc(1 + 1, __func__);
+ (*queue)[0] = (char) test;
+ (*queue)[1] = '\0';
+ }
+ }
+ }
+ return ret;
+}
+
+
+
+extern char * get_message_from_queue(char ** queue)
+{
+ if (!(*queue))
+ {
+ return NULL;
+ }
+ char * first_nl = strchr(*queue, '\n');
+ if (!first_nl)
+ {
+ return NULL;
+ }
+ char * msg = try_malloc(first_nl - (*queue) + 1, __func__);
+ memcpy(msg, *queue, first_nl - (*queue));
+ msg[first_nl - (*queue)] = '\0';
+ char * new_queue = try_malloc(strlen(first_nl + 1) + 1, __func__);
+ memcpy(new_queue, first_nl + 1, strlen(first_nl + 1) + 1);
+ free(*queue);
+ *queue = new_queue;
+ return msg;
+}