Moved low-level read/write-to-file functions into their own library.

diff --git a/Makefile b/Makefile
index 72e91137ac2f1cb17724c083a76e35452fd864e7..176bd688eea9ba5e10acc06eb4d4dce5413383ba 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -2,8 +2,9 @@ roguelike:
        cc -Wall -g -o windows.o -c windows.c
        cc -Wall -g -o draw_wins.o -c draw_wins.c
        cc -Wall -g -o keybindings.o -c keybindings.c
+       cc -Wall -g -o readwrite.o -c readwrite.c
        cc -Wall -g -o roguelike.o -c roguelike.c
-       cc -Wall -g -o roguelike windows.o draw_wins.o keybindings.o roguelike.o -lncurses
+       cc -Wall -g -o roguelike windows.o draw_wins.o keybindings.o readwrite.o roguelike.o -lncurses
 
 clean:
        rm *.o; rm roguelike

diff --git a/readwrite.c b/readwrite.c
new file mode 100644 (file)
index 0000000..ed5a3a3
--- /dev/null
+++ b/readwrite.c
@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include <limits.h>
+#include <stdint.h>
+
+uint16_t read_uint16_bigendian(FILE * file) {
+// Read uint16 from file in big-endian order.
+  const uint16_t nchar = UCHAR_MAX + 1;
+  unsigned char a = fgetc(file);
+  unsigned char b = fgetc(file);
+  return (a * nchar) + b; }
+
+void write_uint16_bigendian(uint16_t x, FILE * file) {
+// Write uint16 to file in beg-endian order.
+  const uint16_t nchar = UCHAR_MAX + 1;
+  unsigned char a = x / nchar;
+  unsigned char b = x % nchar;
+  fputc(a, file);
+  fputc(b, file); }
+
+uint32_t read_uint32_bigendian(FILE * file) {
+// Read uint32 from file in big-endian order.
+  const uint16_t nchar = UCHAR_MAX + 1;
+  unsigned char a = fgetc(file);
+  unsigned char b = fgetc(file);
+  unsigned char c = fgetc(file);
+  unsigned char d = fgetc(file);
+  return (a * nchar * nchar * nchar) + (b * nchar * nchar) + (c * nchar) + d; }
+
+void write_uint32_bigendian(uint32_t x, FILE * file) {
+// Write uint32 to file in beg-endian order.
+  const uint16_t nchar = UCHAR_MAX + 1;
+  unsigned char a = x / (nchar * nchar * nchar);
+  unsigned char b = (x - (a * nchar * nchar * nchar)) / (nchar * nchar);
+  unsigned char c = (x - ((a * nchar * nchar * nchar) + (b * nchar * nchar))) / nchar;
+  unsigned char d = x % nchar;
+  fputc(a, file);
+  fputc(b, file);
+  fputc(c, file);
+  fputc(d, file); }
+

diff --git a/readwrite.h b/readwrite.h
new file mode 100644 (file)
index 0000000..28bc3ab
--- /dev/null
+++ b/readwrite.h
@@ -0,0 +1,5 @@
+uint16_t read_uint16_bigendian(FILE * file);
+void write_uint16_bigendian(uint16_t x, FILE * file);
+uint32_t read_uint32_bigendian(FILE * file);
+void write_uint32_bigendian(uint32_t x, FILE * file);
+

diff --git a/readwrite.o b/readwrite.o
new file mode 100644 (file)
index 0000000..b8faf76
Binary files /dev/null and b/readwrite.o differ

diff --git a/roguelike.c b/roguelike.c
index 2bab85f851dfe60c9de8fa4f1b306d66e5f7ed78..f0057e295884edbae3ad10dc1819dcd9d07d3c8d 100644 (file)
--- a/roguelike.c
+++ b/roguelike.c
@@ -1,5 +1,4 @@
 #include <stdlib.h>
-#include <limits.h>
 #include <stdint.h>
 #include <ncurses.h>
 #include <string.h>
@@ -9,6 +8,7 @@
 #include "draw_wins.h"
 #include "roguelike.h"
 #include "keybindings.h"
+#include "readwrite.h"
 
 uint16_t rrand(char use_seed, uint32_t new_seed) {
 // Pseudo-random number generator (LGC algorithm). Use instead of rand() to ensure portable predictability.
@@ -18,42 +18,6 @@ uint16_t rrand(char use_seed, uint32_t new_seed) {
   seed = ((seed * 1103515245) + 12345) % 2147483648;   // Values as recommended by POSIX.1-2001 (see rand(3)).
   return (seed / 65536); }                         // Ignore least significant 16 bits (they are less random).
 
-uint16_t read_uint16_bigendian(FILE * file) {
-// Read uint16 from file in big-endian order.
-  const uint16_t nchar = UCHAR_MAX + 1;
-  unsigned char a = fgetc(file);
-  unsigned char b = fgetc(file);
-  return (a * nchar) + b; }
-
-void write_uint16_bigendian(uint16_t x, FILE * file) {
-// Write uint16 to file in beg-endian order.
-  const uint16_t nchar = UCHAR_MAX + 1;
-  unsigned char a = x / nchar;
-  unsigned char b = x % nchar;
-  fputc(a, file);
-  fputc(b, file); }
-
-uint32_t read_uint32_bigendian(FILE * file) {
-// Read uint32 from file in big-endian order.
-  const uint16_t nchar = UCHAR_MAX + 1;
-  unsigned char a = fgetc(file);
-  unsigned char b = fgetc(file);
-  unsigned char c = fgetc(file);
-  unsigned char d = fgetc(file);
-  return (a * nchar * nchar * nchar) + (b * nchar * nchar) + (c * nchar) + d; }
-
-void write_uint32_bigendian(uint32_t x, FILE * file) {
-// Write uint32 to file in beg-endian order.
-  const uint16_t nchar = UCHAR_MAX + 1;
-  unsigned char a = x / (nchar * nchar * nchar);
-  unsigned char b = (x - (a * nchar * nchar * nchar)) / (nchar * nchar);
-  unsigned char c = (x - ((a * nchar * nchar * nchar) + (b * nchar * nchar))) / nchar;
-  unsigned char d = x % nchar;
-  fputc(a, file);
-  fputc(b, file);
-  fputc(c, file);
-  fputc(d, file); }
-
 void save_game(struct World * world) {
 // Save game data to game file.
   FILE * file = fopen("savefile", "w");

diff --git a/roguelike.h b/roguelike.h
index 3fdbbaf4c43ea31966dd2a22c349659e00fc212c..d82313e62d6aadcd81b7a3846651c9f78aaad95f 100644 (file)
--- a/roguelike.h
+++ b/roguelike.h
@@ -25,10 +25,6 @@ struct Monster {
   uint16_t x; };
 
 uint16_t rrand(char, uint32_t);
-uint16_t read_uint16_bigendian(FILE * file);
-void write_uint16_bigendian(uint16_t x, FILE * file);
-uint32_t read_uint32_bigendian(FILE * file);
-void write_uint32_bigendian(uint32_t x, FILE * file);
 void save_game(struct World *);
 void toggle_window (struct WinMeta *, struct Win *);
 void scroll_pad (struct WinMeta *, char);