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      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 1998 - 2015, 2017, 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 - strlen(prefix));
     42   if(!config->mute) {
     43     size_t len;
     44     char *ptr;
     45     char *print_buffer;
     46 
     47     print_buffer = curlx_mvaprintf(fmt, ap);
     48     if(!print_buffer)
     49       return;
     50     len = strlen(print_buffer);
     51 
     52     ptr = print_buffer;
     53     while(len > 0) {
     54       fputs(prefix, config->errors);
     55 
     56       if(len > width) {
     57         size_t cut = width-1;
     58 
     59         while(!ISSPACE(ptr[cut]) && cut) {
     60           cut--;
     61         }
     62         if(0 == cut)
     63           /* not a single cutting position was found, just cut it at the
     64              max text width then! */
     65           cut = width-1;
     66 
     67         (void)fwrite(ptr, cut + 1, 1, config->errors);
     68         fputs("\n", config->errors);
     69         ptr += cut + 1; /* skip the space too */
     70         len -= cut;
     71       }
     72       else {
     73         fputs(ptr, config->errors);
     74         len = 0;
     75       }
     76     }
     77     curl_free(print_buffer);
     78   }
     79 }
     80 
     81 /*
     82  * Emit 'note' formatted message on configured 'errors' stream, if verbose was
     83  * selected.
     84  */
     85 void notef(struct GlobalConfig *config, const char *fmt, ...)
     86 {
     87   va_list ap;
     88   va_start(ap, fmt);
     89   if(config->tracetype)
     90     voutf(config, NOTE_PREFIX, fmt, ap);
     91   va_end(ap);
     92 }
     93 
     94 /*
     95  * Emit warning formatted message on configured 'errors' stream unless
     96  * mute (--silent) was selected.
     97  */
     98 
     99 void warnf(struct GlobalConfig *config, const char *fmt, ...)
    100 {
    101   va_list ap;
    102   va_start(ap, fmt);
    103   voutf(config, WARN_PREFIX, fmt, ap);
    104   va_end(ap);
    105 }
    106 /*
    107  * Emit help formatted message on given stream.
    108  */
    109 
    110 void helpf(FILE *errors, const char *fmt, ...)
    111 {
    112   va_list ap;
    113   if(fmt) {
    114     va_start(ap, fmt);
    115     fputs("curl: ", errors); /* prefix it */
    116     vfprintf(errors, fmt, ap);
    117     va_end(ap);
    118   }
    119   fprintf(errors, "curl: try 'curl --help' "
    120 #ifdef USE_MANUAL
    121           "or 'curl --manual' "
    122 #endif
    123           "for more information\n");
    124 }
    125 
    126