X-Git-Url: https://plomlompom.com/repos/index.html?a=blobdiff_plain;f=src%2Freadwrite.c;h=4bdf5ae3da5eb07038a0b88f06d63e4f34c892e9;hb=7290dec4219eaa2325aa00ef6139f715743dba3a;hp=5b318524619d53180055f8aafbc489f9292827e5;hpb=6d3206140b1950e34fe8dc683acdabd454fd38bf;p=plomrogue
diff --git a/src/readwrite.c b/src/readwrite.c
index 5b31852..4bdf5ae 100644
--- a/src/readwrite.c
+++ b/src/readwrite.c
@@ -1,8 +1,15 @@
/* readwrite.c */
#include "readwrite.h"
-#include /* for FILE typedef*/
+#include /* for FILE typedef, fopen(), fgetc(), fputc(), fseek(),
+ * sprintf(), fwrite(), ferror()
+ */
#include /* for uint8_t, uint16_t, uint32_t */
+#include /* for strlen()*/
+#include /* for unlink() */
+#include "rexit.h" /* for exit_err() */
+#include "misc.h" /* for trouble_msg() */
+#include "main.h" /* for world global */
@@ -25,6 +32,138 @@ static uint8_t read_uintX_bigendian(FILE * file, uint32_t * x, uint8_t size);
static uint8_t write_uintX_bigendian(FILE * file, uint32_t x, uint8_t size);
+
+extern FILE * try_fopen(char * path, char * mode, char * f)
+{
+ char * msg1 = "Trouble in ";
+ char * msg2 = " with fopen() (mode '";
+ char * msg3 = "') on path '";
+ char * msg4 = "'.";
+ uint16_t size = strlen(msg1) + strlen(msg2) + strlen(msg3) + strlen(msg4)
+ + strlen(f) + strlen(path) + strlen(mode) + 1;
+ char msg[size];
+ sprintf(msg, "%s%s%s%s%s%s%s", msg1, f, msg2, mode, msg3, path, msg4);
+ FILE * file_p = fopen(path, mode);
+ exit_err(NULL == file_p, msg);
+ return file_p;
+}
+
+
+
+extern void try_fclose(FILE * file, char * f)
+{
+ char * msg = trouble_msg(f, "fclose()");
+ exit_err(fclose(file), msg);
+ free(msg);
+}
+
+
+
+extern char * try_fgets(char * line, int linemax, FILE * file, char * f)
+{
+ char * msg = trouble_msg(f, "fgets()");
+ char * test = fgets(line, linemax, file);
+ exit_err(NULL == test && ferror(file), msg);
+ free(msg);
+ return test;
+}
+
+
+
+extern void try_fwrite(void * ptr, size_t size, size_t nmemb, FILE * stream,
+ char * f)
+{
+ char * msg = trouble_msg(f, "fwrite()");
+ exit_err(0 == fwrite(ptr, size, nmemb, stream), msg);
+ free(msg);
+}
+
+
+
+extern void try_fclose_unlink_rename(FILE * file, char * p1, char * p2,
+ char * f)
+{
+ try_fclose(file, f);
+ char * msg1 = "Trouble in ";
+ char * msg4 = "'.";
+ if (!access(p2, F_OK))
+ {
+ char * msg2 = " with unlink() on path '";
+ uint16_t size = strlen(msg1) + strlen(msg2) + strlen(msg4)
+ + strlen(f) + strlen(p2) + 1;
+ char msg[size];
+ sprintf(msg, "%s%s%s%s%s", msg1, f, msg2, p2, msg4);
+ exit_err(unlink(p2), msg);
+ }
+ char * msg2 = " with rename() from '";
+ char * msg3 = "' to '";
+ uint16_t size = strlen(msg1) + strlen(f) + strlen(msg2) + strlen(p1)
+ + strlen(msg3) + strlen(p2) + strlen(msg4) + 1;
+ char msg[size];
+ sprintf(msg, "%s%s%s%s%s%s%s", msg1, f, msg2, p1, msg3, p2, msg4);
+ exit_err(rename(p1, p2), msg);
+}
+
+
+
+extern uint16_t get_linemax(FILE * file, char * f)
+{
+ char * msg = trouble_msg(f, "textfile_sizes()");
+ uint16_t linemax;
+ exit_err(textfile_sizes(file, &linemax, NULL), msg);
+ free(msg);
+ return linemax;
+}
+
+
+
+extern uint8_t textfile_sizes(FILE * file, uint16_t * linemax_p,
+ uint16_t * n_lines_p)
+{
+ int c = 0;
+ uint16_t c_count = 0;
+ uint16_t n_lines = 0;
+ uint16_t linemax = 0;
+ while (1)
+ {
+ c = fgetc(file);
+ if (EOF == c)
+ {
+ break;
+ }
+ c_count++;
+ if ('\n' == c)
+ {
+ if (c_count > linemax)
+ {
+ linemax = c_count;
+ }
+ c_count = 0;
+ if (n_lines_p)
+ {
+ n_lines++;
+ }
+ }
+ }
+ if (0 == linemax && 0 < c_count) /* Handle files that consist of only one */
+ { /* line / lack newline chars. */
+ linemax = c_count;
+ }
+
+ if (-1 == fseek(file, 0, SEEK_SET))
+ {
+ return 1;
+ }
+ * linemax_p = linemax;
+ if (n_lines_p)
+ {
+ * n_lines_p = n_lines;
+ }
+ return 0;
+}
+
+
+
static uint8_t read_uintX_bigendian(FILE * file, uint32_t * x, uint8_t size)
{
* x = 0;