X-Git-Url: https://git.danieliu.xyz/?a=blobdiff_plain;ds=sidebyside;f=fileutils.asm;h=32dcef6fd579a9610fd45dc1a3f89cf9cabf2f60;hb=HEAD;hp=6c30ca61658fa6f2e9ff68b2160ae4f31c3dd8d5;hpb=6cf67300c03d92a9cc0c5888b33cdb21a852eb69;p=sped.git

diff --git a/fileutils.asm b/fileutils.asm
index 6c30ca6..32dcef6 100644
--- a/fileutils.asm
+++ b/fileutils.asm
@@ -1,3 +1,6 @@
+; sped - the stupidly pointless editor
+; written by pinosaur
+; fileutils.asm: file i/o
 
 %include "macros.S"
 
@@ -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
 
@@ -62,16 +66,12 @@ readFile:
 
     push DWORD [ebp-FILE_HANDLE]
     call readLine 
-
     mov esi, eax
     mov [ebp-IS_EOF], ebx
 
     ; check if eof was reached
     cmp DWORD [ebp-IS_EOF], 1
     je _readFile_exit
-    
-    ; push esi
-    ; call printf
 
     ; 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