en:docs:fapi:dosgetversion

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en:docs:fapi:dosgetversion [2018/09/01 18:17]
prokushev
en:docs:fapi:dosgetversion [2021/10/17 08:28] (current)
prokushev
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-{{logos:os2.gif?​35x35}} {{logos:dos.gif?​35x35}}+{{page>en:templates:fapiint}}
  
 ====== DosGetVersion ====== ====== DosGetVersion ======
  
-This call returns the OS/2 version number.+This call returns the OS version number.
  
-==Syntax== +===== Syntax =====
- ​DosGetVersion (VersionWord)+
  
-==Parameters== +<code c> 
-;​VersionWord ​(PUSHORT- output:​Address of the OS/2 version number. The version is stored as two bytes, with the minor version in the first byte and major version in the second byte.+DosGetVersion ​(VersionWord) 
 +</code>
  
-==Return Code== +===== Parameters =====
- rc (USHORT) - return +
-Return code description is: +
-* 0 NO_ERROR+
  
-==Remarks== +  * VersionWord ([[PUSHORT]]) - output:​Address of the OS version numberThe version is stored as two bytes, with the minor version in the first byte and major version in the second byte.
-This function has been eliminated since OS/2 2.0.+
  
-==Bindings== +===== Return Code =====
-===C=== +
-<​PRE>​ +
-#define INCL_DOSMISC+
  
-USHORT ​ rc = DosGetVersion(VersionWord);​ +  * rc ([[USHORT]]- return 
-PUSHORT VersionWord; ​  ​/Version number ​(returned*/ +  ​ 
-USHORT ​ rc;            /* return ​code */ +Return ​code description is:
-</​PRE>​+
  
-===MASM=== +  * 0 NO_ERROR
-<​PRE>​ +
-EXTRN DosGetVersion:​FAR +
-INCL_DOSMISC ​ EQU 1+
  
-PUSH@  WORD    VersionWord ​  ;​Version number(returned) +===== Bindings =====
-CALL   ​DosGetVersion+
  
-Returns WORD +==== C ==== 
-</PRE>+<code c> 
 +  #define INCL_DOSMISC 
 +   
 +  USHORT ​ rc = DosGetVersion(VersionWord);​ 
 +  PUSHORT VersionWord; ​  /* Version number (returned) */ 
 +  USHORT ​ rc;            /* return code */ 
 +</code>
  
-==Example== +==== MASM ====
-The following example shows how one may obtain information for program initialization. The program locates the environment segment and prints the name of the command from the command line. It then obtains the OS/2 version number and prints it. +
-<​PRE>​ +
-#define INCL_DOS +
-#include <​os2.h>​ +
-#define ENVVARNAME "​PATH"​+
  
-main() +<code asm> 
-{ +  EXTRN DosGetVersion:​FAR 
-  ​SEL       ​EnvSel; ​       /* Environment segment selector (returned) */ +  ​INCL_DOSMISC ​ EQU 1 
-  ​USHORT ​   CmdOffset; ​    /* Offset into env. seg. of command line (returned) */ +   
-  ​PSZ FAR   ​*Commandline; ​ /* Pointer made by EnvSel and CmdOffset */ +  ​PUSH@  WORD    VersionWord ​  ;​Version ​number(returned) 
-  USHORT ​   Version      /* Version ​numbers ​(returned) ​*/ +  ​CALL   ​DosGetVersion 
-  ​BYTE      MajorVer; ​     /* Major version number */ +</code> 
-  ​BYTE ​     MinorVer; ​     /* Minor version number *+Returns WORD
-  ​USHORT ​   rc;            /* return code */+
  
-  /** Locate environment segment and offset of command line. **/+==== Example ====
  
-  if(!(rc=DosGetEnv(&​EnvSel, ​      /* Env. seg. selector (returned) */ 
-                    &​CmdOffset))) ​ /* Offset of command line 
-                                           ​(returned) */ 
-    printf("​Environment located; selector is %x offset is %x\n", EnvSel, 
-            CmdOffset); 
  
-  /** Use a macro to make a far pointer out of selector:​offset pair.**/ +The following example shows how one may obtain information for program initialization. The program locates the environment segment and prints the name of the command from the command lineIt then obtains ​the OS version number and prints it.
-  /** Notice ​the far-string pointer specification (%Fs) used to print **/+
  
-  Commandline = MAKEP(EnvSel,​ CmdOffset); +<code c> 
-  ​printf("​Command entered is %Fs.\n",​ Commandline);​ +  ​#define INCL_DOS 
- +  ​#include <os2.h> 
-  ​/** Obtain and print version info; use macros to extract info**/ +  ​#define ENVVARNAME "​PATH"​ 
-  ​/** We need to divide by 10 to obtain true version numbers. ​   **/ +   
- +  ​main()
-  ​if(!(rc=DosGetVersion(&​Version)))+
   {   {
-    MajorVer = HIBYTE(Version) / 10; +    ​SEL       ​EnvSel; ​       /* Environment segment selector (returned) */ 
-    MinorVer = LOBYTE(Version) / 10; +    USHORT ​   CmdOffset; ​    /* Offset into env. seg. of command line (returned) */ 
-    printf("​This is OS/2 version %d.%d\n",​ MajorVer, MinorVer);+    PSZ FAR   ​*Commandline; ​ /* Pointer made by EnvSel and CmdOffset */ 
 +    USHORT ​   Version; ​      /* Version numbers (returned) */ 
 +    BYTE      MajorVer; ​     /* Major version number */ 
 +    BYTE      MinorVer; ​     /* Minor version number */ 
 +    USHORT ​   rc;            /* return code */ 
 +   
 +    /** Locate environment segment and offset of command line. **/ 
 +   
 +    if(!(rc=DosGetEnv(&​EnvSel, ​      /* Env. seg. selector (returned) */ 
 +                      &​CmdOffset))) ​ /* Offset of command line 
 +                                             ​(returned) */ 
 +      printf("​Environment located; selector is %x offset is %x\n", EnvSel, 
 +              CmdOffset);​ 
 +   
 +    /** Use a macro to make a far pointer out of selector:​offset pair.**/ 
 +    /** Notice the far-string pointer specification (%Fs) used to print **/ 
 +   
 +    Commandline = MAKEP(EnvSel,​ CmdOffset);​ 
 +    printf("​Command entered is %Fs.\n",​ Commandline);​ 
 +   
 +    /** Obtain and print version info; use macros to extract info. **/ 
 +    /** We need to divide by 10 to obtain true version numbers. ​   **/ 
 +   
 +    if(!(rc=DosGetVersion(&​Version))) 
 +    { 
 +      ​MajorVer = HIBYTE(Version) / 10; 
 +      MinorVer = LOBYTE(Version) / 10; 
 +      printf("​This is OS/2 version %d.%d\n",​ MajorVer, MinorVer); 
 +    }
   }   }
-+</code>
-</PRE> +
- +
  
-====== Note ======+===== Note =====
  
 Text based on [[http://​www.edm2.com/​index.php/​DosGetVersion]] Text based on [[http://​www.edm2.com/​index.php/​DosGetVersion]]

en/docs/fapi/dosgetversion.1535818636.txt.gz · Last modified: 2018/09/01 18:17 by prokushev