reading, and sorting chunks

TODO.md

@@ -1,7 +1,7 @@
-- [ ] file operations
-  - [ ] write to file (at index)
-  - [ ] print_file (maybe just calling cat???)
-- [ ] a tape type - representing a file?
+- [x] file operations
+  - [x] write to file (at index)
+  - [x] read file 
+- [x] a tape type - representing a file?
 - [x] a record type - x1,x2,x3,x4,x5
   - [x] comparing records
 - [x] buffer quick sort
@@ -9,5 +9,14 @@
   - [x] cmd args - man getopts
 - [x] file input
 - [x] keyboard input
+- [ ] stage 1
+  - [x] reading chunks
+  - [x] sorting
+  - [ ] writing chunks
+- [ ] stage 2
+  - [ ] reading chunks
+  - [ ] multiway merge
+  - [ ] writing chunks
+  - [ ] repeat untill done
 - [ ] testing
 - [ ] report

main.c

@@ -110,20 +110,40 @@ void write_file(options* opts)
 {
 }
 
-void sort_file(options* opts)
+int sort_block(tape* t, buffer* buff)
+{
+    static int counter = 0;
+    int status = read_buffer(buff, t);
+    if (status != SUCCESS && status != EOF) {
+        fprintf(stderr, "Error reading file: %d\n", status);
+        return status;
+    }
+
+    sort_buffer(buff);
+    printf("sorted the buffer %d, the results:\n", counter);
+    print_buffer(buff);
+    counter++;
+    return status;
+}
+
+int sort_file(options* opts)
 {
     tape a = { 0, 0, opts->input };
     buffer buff;
-    buff.capacity = 100;
+    buff.capacity = opts->b * opts->n;
     buff.location = malloc(sizeof(record) * buff.capacity);
-    int status = read_buffer(&buff, &a);
-    if (status != SUCCESS && status != EOF) {
-        printf("Error reading file: %d\n", status);
+    int status = 0;
+    while (status == SUCCESS) {
+        status = sort_block(&a, &buff);
     }
-    fclose(a.file);
-    a.file = stdout;
-    sort_buffer(&buff);
+    if (status != EOF) {
         free(buff.location);
+        fclose(a.file);
+        return status;
+    }
+    free(buff.location);
+    fclose(a.file);
+    return SUCCESS;
 }
 
 int main(int argc, char** argv)

makefile

@@ -16,9 +16,9 @@ clean:
 	rm -rf build
 
 run: build/main
-	build/main -f tests/1.in
+	build/main -f tests/2.in | less
 
 debug: build/main
-	lldb -- build/main -f tests/1.in
+	lldb -- build/main -f tests/2.in
 
-.PHONY: clean run 
+.PHONY: clean run debug

tape.c

@@ -60,6 +60,39 @@ int read_buffer(buffer* buff, tape* tape)
     return 0;
 }
 
+void print_full_buffer(buffer* buff)
+{
+    for (int i = 0; i < buff->length; i++) {
+        record* current = buff->location;
+        current += i;
+        printf("i: %d\tg: %d\t", i, g(current));
+        print_record(stdout, current);
+        printf("\n");
+    }
+}
+
+void print_buffer(buffer* buff)
+{
+    if (buff->length <= 10) {
+        print_full_buffer(buff);
+        return;
+    }
+    for (int i = 0; i < 5; i++) {
+        record* current = buff->location;
+        current += i;
+        printf("i: %d\tg: %d\t", i, g(current));
+        print_record(stdout, current);
+        printf("\n");
+    }
+    for (int i = buff->length - 5; i < buff->length; i++) {
+        record* current = buff->location;
+        current += i;
+        printf("i: %d\tg: %d\t", i, g(current));
+        print_record(stdout, current);
+        printf("\n");
+    }
+}
+
 int write_buffer(buffer* buff, tape* tape)
 {
     record* current = buff->location;

tape.h

@@ -20,5 +20,6 @@ void sort_buffer(buffer* buff);
 int read_buffer(buffer* buff, tape* tape);
 // writes everything
 int write_buffer(buffer* buff, tape* tape);
+void print_buffer(buffer* buff);
 
 void clear_tape(tape* tape);