chanserv/q9snprintf.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <stdarg.h>
   4 #include <string.h>
   5 #include "../lib/sstring.h"
   6 #include "../lib/stringbuf.h"
   7 #include "../core/error.h"
   8
   9 #define MAXARGS 10
  10 #define CONVBUF 512
  11
  12 void q9vsnprintf(char *buf, size_t size, const char *format, const char *args, va_list ap) {
  13   StringBuf b;
  14   const char *p;
  15   char *c;
  16   char convbuf[MAXARGS][CONVBUF];
  17
  18   if(size == 0)
  19     return;
  20
  21   {
  22     int argno = 0, i;
  23
  24     int d;
  25     char *s;
  26     double g;
  27     unsigned int u;
  28
  29     for(i=0;i<MAXARGS;i++)
  30       convbuf[i][0] = '\0';
  31
  32     for(;*args;args++) {
  33       char *cb = convbuf[argno++];
  34
  35       switch(*args) {
  36         case 's':
  37           s = va_arg(ap, char *);
  38           snprintf(cb, CONVBUF, "%s", s);
  39           break;
  40         case 'd':
  41           d = va_arg(ap, int);
  42           snprintf(cb, CONVBUF, "%d", d);
  43           break;
  44         case 'u':
  45           u = va_arg(ap, unsigned int);
  46           snprintf(cb, CONVBUF, "%u", u);
  47           break;
  48         case 'g':
  49           g = va_arg(ap, double);
  50           snprintf(cb, CONVBUF, "%.1f", g);
  51           break;
  52         default:
  53           /* calls exit(0) */
  54           Error("chanserv", ERR_STOP, "Bad format specifier '%c' supplied in q9vsnprintf, format: '%s'", *args, format);
  55       }
  56     }
  57   }
  58
  59   b.buf = buf;
  60   b.capacity = size;
  61   b.len = 0;
  62
  63   for(p=format;*p;p++) {
  64     if(*p != '$') {
  65       if(!sbaddchar(&b, *p))
  66         break;
  67       continue;
  68     }
  69     p++;
  70     if(*p == '\0')
  71       break;
  72     if(*p == '$') {
  73       if(!sbaddchar(&b, *p))
  74         break;
  75       continue;
  76     }
  77
  78     c = NULL;
  79     switch(*p) {
  80 /*
  81       case 'C':
  82         c = botname; break;
  83       case 'N':
  84         c = network; break;
  85 */
  86       case '0':
  87       case '1':
  88       case '2':
  89       case '3':
  90       case '4':
  91       case '5':
  92       case '6':
  93       case '7':
  94       case '8':
  95       case '9':
  96         c = convbuf[*p - '0']; break;
  97       default:
  98         c = "(bad format specifier)";
  99     }
 100     if(c)
 101       if(!sbaddstr(&b, c))
 102         break;
 103   }
 104
 105   sbterminate(&b);
 106
 107   /* not required */
 108   /*
 109   buf[size-1] = '\0';
 110   */
 111 }
 112
 113 void q9snprintf(char *buf, size_t size, const char *format, const char *args, ...) {
 114   va_list ap;
 115
 116   va_start(ap, args);
 117   q9vsnprintf(buf, size, format, args, ap);
 118   va_end(ap);
 119 }