all, i'm calling spritf function to convert float to ascii from msvcrt.dll. On a pentium 133 it works fine, on my PII350 it dosen't work, i get an error inside sprintf function, msvcrt.dll, at a line RET 10. Since i don't think the problem is on the PC/processor, there could be a bad coding problem. I attach the code involved.

ASCII to float
                call    sscanf, offset buffer, offset float_fmt, offset f 
                add     esp,12
               
;               Execute function choosed on edit box (all floating functions !!)
                finit
                call    Functions
                fstp    result 

;               float to ASCII                       
                call    sprintf, offset buffer, offset float_fmt, result
                add     esp,16    

 
If som help ... THX
Posted on 2001-06-22 02:02:00 by angelo
The add esp, 12 might be a problem. I just happened to read and understand this time Icz's tutorial 1 & 2. Comment out that line and see if that helps.
Posted on 2001-06-22 02:15:00 by eet_1024
Hi angelo, since your call of sprintf has only 3 parameters, the following "add esp" statement should add 3*4, not 4*4 to esp


;               float to ASCII                       
                call    sprintf, offset buffer, offset float_fmt, result
                add     esp,16    ;<--- change to "add esp,12"

 
japheth
Posted on 2001-06-22 03:29:00 by japheth
What version of msvcrt are you using ? Under windows NT there is not ret 10, only a ret. Try add esp, 6 after the sprintf, but it's strange. sprintf accepts a variable number of arguments, so the caller do the stack cleanup, not the function.
Posted on 2001-06-22 03:43:00 by karim
if this is your source code, does your assembler accept calls with more than 1 parameter (masm uses invoke instead)? and please tell us the type of parameter "result" (real4 or real8)
Posted on 2001-06-22 04:24:00 by japheth
FIRST OF ALL THANK YOU ALL FOR THE INTEREST japheth, result is a REAL8, for this reason i do add esp,16 (4+4+8) and this should work correctly i can't do INVOKE, i'm using TASM50 karim, msvcrt.dll version that work is 261K, 01-03-99 is possible that i have, on these two w95 systems, differents dll versions ?
Posted on 2001-06-22 06:54:00 by angelo
May be it is a link problem. If your app is statically linked to msvcrt by number, this can be a problem, if you have used a "bad" msvcrt.lib for linking. For example, in my msvcrt.dll (08/30/1999) ordinal number for sprintf is 691.
Posted on 2001-06-22 08:23:00 by japheth
Under Windows NT, there are two msvcrt.dll, one is 265K and the other is 285K. I've tried both and none of them use ret 10. It's strange. How many msvcrt dlls do you have ?
Posted on 2001-06-22 08:30:00 by karim
All the floating point arithmetic inside C runtime libaries are done using an 8-bytes format (all parameters and return values - of course in FPU stack). When you say

	Invoke	sprintf, Offset szBuf, Offset szFmt, float1
I think MASM pushes only 4-bytes instead of 8-bytes. The following code works fine for me.


	Bits	32

	Segment data Use32

float1	DD	1.234567
float2	DQ	1.234567
szFmt	DB	"%f", 0

	Segment bss Use32

szBuf	RESB	80

	Extern	sprintf
	Extern	printf

	Segment code Use32

..start:

	Push	DWord 
	Push	DWord 
	Push	Dword szFmt
	Push	DWord szBuf
	Call	sprintf
	Add	esp, 16

	Push	DWord szBuf
	Call	printf
	Add	esp, 4

	Fld	DWord 
	Fstp	QWord 
	Push	Dword szFmt
	Push	DWord szBuf
	Call	sprintf
	Add	esp, 16

	Push	DWord szBuf
	Call	printf
	Add	esp, 4

	Ret

Jones
Posted on 2001-06-22 12:37:00 by sjhenry
HI ALL ! :) I'm back @home, sorry but before i was in job-time and i couldn't promptly answer. I think we're near the solution. Here, @home, i've checked the msvcrt.dll: it have 274K 16/06/01 ! It's a strange msvcrt, don't you think ? I'had created msvcrt.lib with IMPLIB utility, by borland. And I had created from the other 01-03-99 msvcrt.dll. Probably my app linked with oldest .lib don't work with the new. But why i have here this new msvcrt ? Maybe som installed program has rewrite it ? thanks again
Posted on 2001-06-22 17:27:00 by angelo