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      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel (at) haxx.se>, et al.
      9  *
     10  * This software is licensed as described in the file COPYING, which
     11  * you should have received as part of this distribution. The terms
     12  * are also available at https://curl.haxx.se/docs/copyright.html.
     13  *
     14  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
     15  * copies of the Software, and permit persons to whom the Software is
     16  * furnished to do so, under the terms of the COPYING file.
     17  *
     18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
     19  * KIND, either express or implied.
     20  *
     21  ***************************************************************************/
     22 #include "tool_setup.h"
     23 
     24 #define ENABLE_CURLX_PRINTF
     25 /* use our own printf() functions */
     26 #include "curlx.h"
     27 
     28 #include "tool_cfgable.h"
     29 #include "tool_msgs.h"
     30 
     31 #include "memdebug.h" /* keep this as LAST include */
     32 
     33 #define WARN_PREFIX "Warning: "
     34 #define NOTE_PREFIX "Note: "
     35 
     36 static void voutf(struct GlobalConfig *config,
     37                   const char *prefix,
     38                   const char *fmt,
     39                   va_list ap)
     40 {
     41   size_t width = (79 - (int)strlen(prefix));
     42   if(!config->mute) {
     43     size_t len;
     44     char *ptr;
     45     char print_buffer[256];
     46 
     47     len = vsnprintf(print_buffer, sizeof(print_buffer), fmt, ap);
     48 
     49     ptr = print_buffer;
     50     while(len > 0) {
     51       fputs(prefix, config->errors);
     52 
     53       if(len > width) {
     54         size_t cut = width-1;
     55 
     56         while(!ISSPACE(ptr[cut]) && cut) {
     57           cut--;
     58         }
     59         if(0 == cut)
     60           /* not a single cutting position was found, just cut it at the
     61              max text width then! */
     62           cut = width-1;
     63 
     64         (void)fwrite(ptr, cut + 1, 1, config->errors);
     65         fputs("\n", config->errors);
     66         ptr += cut+1; /* skip the space too */
     67         len -= cut;
     68       }
     69       else {
     70         fputs(ptr, config->errors);
     71         len = 0;
     72       }
     73     }
     74   }
     75 }
     76 
     77 /*
     78  * Emit 'note' formatted message on configured 'errors' stream, if verbose was
     79  * selected.
     80  */
     81 void notef(struct GlobalConfig *config, const char *fmt, ...)
     82 {
     83   va_list ap;
     84   va_start(ap, fmt);
     85   if(config->tracetype)
     86     voutf(config, NOTE_PREFIX, fmt, ap);
     87   va_end(ap);
     88 }
     89 
     90 /*
     91  * Emit warning formatted message on configured 'errors' stream unless
     92  * mute (--silent) was selected.
     93  */
     94 
     95 void warnf(struct GlobalConfig *config, const char *fmt, ...)
     96 {
     97   va_list ap;
     98   va_start(ap, fmt);
     99   voutf(config, WARN_PREFIX, fmt, ap);
    100   va_end(ap);
    101 }
    102 /*
    103  * Emit help formatted message on given stream.
    104  */
    105 
    106 void helpf(FILE *errors, const char *fmt, ...)
    107 {
    108   va_list ap;
    109   if(fmt) {
    110     va_start(ap, fmt);
    111     fputs("curl: ", errors); /* prefix it */
    112     vfprintf(errors, fmt, ap);
    113     va_end(ap);
    114   }
    115   fprintf(errors, "curl: try 'curl --help' "
    116 #ifdef USE_MANUAL
    117           "or 'curl --manual' "
    118 #endif
    119           "for more information\n");
    120 }
    121 
    122