release/src/router/libncurses/ncurses/trace/varargs.c

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  28
  29 /****************************************************************************
  30  *  Author: Thomas E. Dickey 2001                                           *
  31  ****************************************************************************/
  32
  33 #include <curses.priv.h>
  34
  35 #include <ctype.h>
  36
  37 MODULE_ID("$Id: varargs.c,v 1.8 2008/11/16 00:19:59 juergen Exp $")
  38
  39 #ifdef TRACE
  40
  41 #define MAX_PARMS 10
  42
  43 typedef enum {
  44     atUnknown = 0, atInteger, atFloat, atPoint, atString
  45 } ARGTYPE;
  46
  47 #define VA_INT(type) ival = (int) va_arg(ap, type)
  48 #define VA_FLT(type) fval = va_arg(ap, type)
  49 #define VA_PTR(type) pval = (char *)va_arg(ap, type)
  50 #define VA_STR(type) sval = va_arg(ap, type)
  51
  52 #define MyBuffer _nc_globals.tracearg_buf
  53 #define MyLength _nc_globals.tracearg_used
  54
  55 /*
  56  * Returns a string that represents the parameter list of a printf-style call.
  57  */
  58 NCURSES_EXPORT(char *)
  59 _nc_varargs(const char *fmt, va_list ap)
  60 {
  61     static char dummy[] = "";
  62
  63     char buffer[BUFSIZ];
  64     const char *param;
  65     int n;
  66
  67     if (fmt == 0 || *fmt == '\0')
  68         return dummy;
  69     if (MyLength == 0)
  70         MyBuffer = typeMalloc(char, MyLength = BUFSIZ);
  71     if (MyBuffer == 0)
  72         return dummy;
  73     *MyBuffer = '\0';
  74
  75     while (*fmt != '\0') {
  76         if (*fmt == '%') {
  77             char *pval = 0;     /* avoid const-cast */
  78             const char *sval = "";
  79             double fval = 0.0;
  80             int done = FALSE;
  81             int ival = 0;
  82             int type = 0;
  83             ARGTYPE parm[MAX_PARMS];
  84             int parms = 0;
  85             ARGTYPE used = atUnknown;
  86
  87             while (*++fmt != '\0' && !done) {
  88
  89                 if (*fmt == '*') {
  90                     VA_INT(int);
  91                     if (parms < MAX_PARMS)
  92                         parm[parms++] = atInteger;
  93                 } else if (isalpha(UChar(*fmt))) {
  94                     done = TRUE;
  95                     switch (*fmt) {
  96                     case 'Z':   /* FALLTHRU */
  97                     case 'h':   /* FALLTHRU */
  98                     case 'l':   /* FALLTHRU */
  99                         done = FALSE;
 100                         type = *fmt;
 101                         break;
 102                     case 'i':   /* FALLTHRU */
 103                     case 'd':   /* FALLTHRU */
 104                     case 'u':   /* FALLTHRU */
 105                     case 'x':   /* FALLTHRU */
 106                     case 'X':   /* FALLTHRU */
 107                         if (type == 'l')
 108                             VA_INT(long);
 109                         else if (type == 'Z')
 110                             VA_INT(size_t);
 111                         else
 112                             VA_INT(int);
 113                         used = atInteger;
 114                         break;
 115                     case 'f':   /* FALLTHRU */
 116                     case 'e':   /* FALLTHRU */
 117                     case 'E':   /* FALLTHRU */
 118                     case 'g':   /* FALLTHRU */
 119                     case 'G':   /* FALLTHRU */
 120                         VA_FLT(double);
 121                         used = atFloat;
 122                         break;
 123                     case 'c':
 124                         VA_INT(int);
 125                         used = atInteger;
 126                         break;
 127                     case 's':
 128                         VA_STR(const char *);
 129                         used = atString;
 130                         break;
 131                     case 'p':
 132                         VA_PTR(void *);
 133                         used = atPoint;
 134                         break;
 135                     case 'n':
 136                         VA_PTR(int *);
 137                         used = atPoint;
 138                         break;
 139                     default:
 140                         break;
 141                     }
 142                 } else if (*fmt == '%') {
 143                     done = TRUE;
 144                 }
 145                 if (used != atUnknown && parms < MAX_PARMS) {
 146                     parm[parms++] = used;
 147                     for (n = 0; n < parms; ++n) {
 148                         used = parm[n];
 149                         param = buffer;
 150                         switch (used) {
 151                         case atInteger:
 152                             sprintf(buffer, "%d", ival);
 153                             break;
 154                         case atFloat:
 155                             sprintf(buffer, "%f", fval);
 156                             break;
 157                         case atPoint:
 158                             sprintf(buffer, "%p", pval);
 159                             break;
 160                         case atString:
 161                             param = _nc_visbuf2(1, sval);
 162                             break;
 163                         case atUnknown:
 164                         default:
 165                             strcpy(buffer, "?");
 166                             break;
 167                         }
 168                         MyLength += strlen(param) + 2;
 169                         MyBuffer = typeRealloc(char, MyLength, MyBuffer);
 170                         sprintf(MyBuffer + strlen(MyBuffer), ", %s", param);
 171                     }
 172                 }
 173                 used = atUnknown;
 174             }
 175         } else {
 176             fmt++;
 177         }
 178     }
 179
 180     return (MyBuffer);
 181 }
 182 #else
 183 EMPTY_MODULE(_nc_varargs)
 184 #endif