X-Git-Url: https://git.danieliu.xyz/?p=sped.git;a=blobdiff_plain;f=fileutils.asm;h=32dcef6fd579a9610fd45dc1a3f89cf9cabf2f60;hp=1d78439ca5a072ae29cac9d6fedb9abd905d6c84;hb=HEAD;hpb=89732d399de9007aaf2894b0c637e8cfb9ed47ac

diff --git a/fileutils.asm b/fileutils.asm
index 1d78439..32dcef6 100644
--- a/fileutils.asm
+++ b/fileutils.asm
@@ -1,5 +1,8 @@
+; sped - the stupidly pointless editor
+; written by pinosaur
+; fileutils.asm: file i/o
 
-%include "utils.S"
+%include "macros.S"
 
 extern printf
 extern malloc
@@ -14,6 +17,7 @@ global writeFile
 
 section .data
     wrongfile_str db `unable to open file, error code: %i\n`, 0x00
+    returnvalue_str db `system call return was %i\n`, 0x00
 
 section .text
 
@@ -60,18 +64,14 @@ readFile:
 
     _readFile_loop:
 
-    ; check if eof was reached
-    cmp DWORD [ebp-IS_EOF], 1
-    je _readFile_exit
-
     push DWORD [ebp-FILE_HANDLE]
     call readLine 
-
     mov esi, eax
     mov [ebp-IS_EOF], ebx
-    
-    ; push esi
-    ; call printf
+
+    ; check if eof was reached
+    cmp DWORD [ebp-IS_EOF], 1
+    je _readFile_exit
 
     ; make string buffer bigger
     mov eax, DWORD [ebp-LINES_READ]
@@ -159,13 +159,6 @@ readLine:
     add ecx, [ebp-CHAR_COUNT]
     mov edx, 1
     int 0x80
-
-    ; mov eax, 4
-    ; mov ebx, 1
-    ; mov ecx, [ebp-STR_PTR]
-    ; add ecx, [ebp-CHAR_COUNT]
-    ; mov edx, 1
-    ; int 0x80
     
     ; check for eof
     cmp eax, 0 ; eax has zero on eof
@@ -233,11 +226,13 @@ writeFile:
 
     ; check if file was open successfully
     cmp eax, 0
-    jge _writeFile_loop
-    push eax
-    push wrongfile_str
-    call printf
-    jmp _writeFile_exit
+    jl _writeFile_error
+
+    ; truncate file
+    mov eax, 93
+    mov ebx, [ebp-FILE_HANDLE]
+    mov ecx, 1
+    int 0x80
     
     _writeFile_loop:
 
@@ -262,6 +257,12 @@ writeFile:
 
     jmp _writeFile_loop
 
+    _writeFile_error:
+    push eax
+    push wrongfile_str
+    call printf
+    jmp _writeFile_exit
+
     _writeFile_exit:
 
     ; close file