chanserv/q9snprintf.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <stdarg.h>
   4 #include <string.h>
   5 #include <time.h>
   6 #include "../lib/sstring.h"
   7 #include "../lib/stringbuf.h"
   8 #include "../core/error.h"
   9 #include "chanserv_messages.h"
  10
  11 #define MAXARGS 10
  12 #define CONVBUF 512
  13
  14 void q9vsnprintf(char *buf, size_t size, const char *format, const char *args, va_list ap) {
  15   StringBuf b;
  16   const char *p;
  17   char *c;
  18   char convbuf[MAXARGS][CONVBUF];
  19
  20   if(size == 0)
  21     return;
  22
  23   {
  24     int argno = 0, i;
  25
  26     int d;
  27     char *s;
  28     double g;
  29     unsigned int u;
  30     time_t t;
  31
  32     for(i=0;i<MAXARGS;i++)
  33       convbuf[i][0] = '\0';
  34
  35     for(;*args;args++) {
  36       char *cb = convbuf[argno++];
  37
  38       switch(*args) {
  39         case 's':
  40           s = va_arg(ap, char *);
  41           snprintf(cb, CONVBUF, "%s", s);
  42           break;
  43         case 'd':
  44           d = va_arg(ap, int);
  45           snprintf(cb, CONVBUF, "%d", d);
  46           break;
  47         case 'u':
  48           u = va_arg(ap, unsigned int);
  49           snprintf(cb, CONVBUF, "%u", u);
  50           break;
  51         case 'g':
  52           g = va_arg(ap, double);
  53           snprintf(cb, CONVBUF, "%.1f", g);
  54           break;
  55         case 'T':
  56           t = va_arg(ap, time_t);
  57           strftime(cb, 15, Q9_FORMAT_TIME, gmtime(&t));
  58           break;
  59         default:
  60           /* calls exit(0) */
  61           Error("chanserv", ERR_STOP, "Bad format specifier '%c' supplied in q9vsnprintf, format: '%s'", *args, format);
  62       }
  63     }
  64   }
  65
  66   sbinit(&b, buf, size);
  67
  68   for(p=format;*p;p++) {
  69     if(*p != '$') {
  70       if(!sbaddchar(&b, *p))
  71         break;
  72       continue;
  73     }
  74     p++;
  75     if(*p == '\0')
  76       break;
  77     if(*p == '$') {
  78       if(!sbaddchar(&b, *p))
  79         break;
  80       continue;
  81     }
  82
  83     c = NULL;
  84     switch(*p) {
  85 /*
  86       case 'C':
  87         c = botname; break;
  88       case 'N':
  89         c = network; break;
  90 */
  91       case '0':
  92       case '1':
  93       case '2':
  94       case '3':
  95       case '4':
  96       case '5':
  97       case '6':
  98       case '7':
  99       case '8':
 100       case '9':
 101         c = convbuf[*p - '0']; break;
 102       default:
 103         c = "(bad format specifier)";
 104     }
 105     if(c)
 106       if(!sbaddstr(&b, c))
 107         break;
 108   }
 109
 110   sbterminate(&b);
 111
 112   /* not required */
 113   /*
 114   buf[size-1] = '\0';
 115   */
 116 }
 117
 118 void q9snprintf(char *buf, size_t size, const char *format, const char *args, ...) {
 119   va_list ap;
 120
 121   va_start(ap, args);
 122   q9vsnprintf(buf, size, format, args, ap);
 123   va_end(ap);
 124 }