src/c-apps/osrf_dbmath.c

   1 #include <opensrf/osrf_app_session.h>
   2 #include <opensrf/osrf_application.h>
   3 #include <opensrf/osrf_json.h>
   4 #include <opensrf/log.h>
   5
   6 #define MODULENAME "opensrf.dbmath"
   7
   8 int osrfAppInitialize();
   9 int osrfAppChildInit();
  10 int osrfMathRun( osrfMethodContext* );
  11
  12
  13 int osrfAppInitialize() {
  14
  15         osrfAppRegisterMethod(
  16                         MODULENAME,
  17                         "add",
  18                         "osrfMathRun",
  19                         "Addss two numbers", 2, 0 );
  20
  21         osrfAppRegisterMethod(
  22                         MODULENAME,
  23                         "sub",
  24                         "osrfMathRun",
  25                         "Subtracts two numbers", 2, 0 );
  26
  27         osrfAppRegisterMethod(
  28                         MODULENAME,
  29                         "mult",
  30                         "osrfMathRun",
  31                         "Multiplies two numbers", 2, 0 );
  32
  33         osrfAppRegisterMethod(
  34                         MODULENAME,
  35                         "div",
  36                         "osrfMathRun",
  37                         "Divides two numbers", 2, 0 );
  38
  39         return 0;
  40 }
  41
  42 int osrfAppChildInit() {
  43         return 0;
  44 }
  45
  46 int osrfMathRun( osrfMethodContext* ctx ) {
  47         if( osrfMethodVerifyContext( ctx ) ) {
  48                 osrfLogError( OSRF_LOG_MARK,  "Invalid method context" );
  49                 return -1;
  50         }
  51
  52         const jsonObject* x = jsonObjectGetIndex(ctx->params, 0);
  53         const jsonObject* y = jsonObjectGetIndex(ctx->params, 1);
  54
  55         if( x && y ) {
  56
  57                 char* a = jsonObjectToSimpleString(x);
  58                 char* b = jsonObjectToSimpleString(y);
  59
  60                 if( a && b ) {
  61
  62                         double i = strtod(a, NULL);
  63                         double j = strtod(b, NULL);
  64                         double r = 0;
  65
  66                         if(!strcmp(ctx->method->name, "add"))   r = i + j;
  67                         if(!strcmp(ctx->method->name, "sub"))   r = i - j;
  68                         if(!strcmp(ctx->method->name, "mult"))  r = i * j;
  69                         if(!strcmp(ctx->method->name, "div"))   r = i / j;
  70
  71                         jsonObject* resp = jsonNewNumberObject(r);
  72                         osrfAppRespondComplete( ctx, resp );
  73                         jsonObjectFree(resp);
  74
  75                         free(a); free(b);
  76                         return 0;
  77                 }
  78                 else {
  79                         if(a) free(a);
  80                         if(b) free(b);
  81                 }
  82         }
  83
  84         return -1;
  85 }
  86
  87
  88