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      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 1998 - 2014, 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_cb_prg.h"
     30 #include "tool_util.h"
     31 
     32 #include "memdebug.h" /* keep this as LAST include */
     33 
     34 /*
     35 ** callback for CURLOPT_XFERINFOFUNCTION
     36 */
     37 
     38 #define MAX_BARLENGTH 256
     39 
     40 int tool_progress_cb(void *clientp,
     41                      curl_off_t dltotal, curl_off_t dlnow,
     42                      curl_off_t ultotal, curl_off_t ulnow)
     43 {
     44   /* The original progress-bar source code was written for curl by Lars Aas,
     45      and this new edition inherits some of his concepts. */
     46 
     47   char line[MAX_BARLENGTH+1];
     48   char format[40];
     49   double frac;
     50   double percent;
     51   int barwidth;
     52   int num;
     53   struct timeval now = tvnow();
     54   struct ProgressData *bar = (struct ProgressData *)clientp;
     55   curl_off_t total;
     56   curl_off_t point;
     57 
     58   /* expected transfer size */
     59   total = dltotal + ultotal + bar->initial_size;
     60 
     61   /* we've come this far */
     62   point = dlnow + ulnow + bar->initial_size;
     63 
     64   if(bar->calls && (tvdiff(now, bar->prevtime) < 100L) && point < total)
     65     /* after first call, limit progress-bar updating to 10 Hz */
     66     /* update when we're at 100% even if last update is less than 200ms ago */
     67     return 0;
     68 
     69   if(point > total)
     70     /* we have got more than the expected total! */
     71     total = point;
     72 
     73   /* simply count invokes */
     74   bar->calls++;
     75 
     76   if(total < 1) {
     77     curl_off_t prevblock = bar->prev / 1024;
     78     curl_off_t thisblock = point / 1024;
     79     while(thisblock > prevblock) {
     80       fprintf(bar->out, "#");
     81       prevblock++;
     82     }
     83   }
     84   else if(point != bar->prev) {
     85     frac = (double)point / (double)total;
     86     percent = frac * 100.0f;
     87     barwidth = bar->width - 7;
     88     num = (int) (((double)barwidth) * frac);
     89     if(num > MAX_BARLENGTH)
     90       num = MAX_BARLENGTH;
     91     memset(line, '#', num);
     92     line[num] = '\0';
     93     snprintf(format, sizeof(format), "\r%%-%ds %%5.1f%%%%", barwidth);
     94     fprintf(bar->out, format, line, percent);
     95   }
     96   fflush(bar->out);
     97   bar->prev = point;
     98   bar->prevtime = now;
     99 
    100   return 0;
    101 }
    102 
    103 void progressbarinit(struct ProgressData *bar,
    104                      struct OperationConfig *config)
    105 {
    106 #ifdef __EMX__
    107   /* 20000318 mgs */
    108   int scr_size[2];
    109 #endif
    110   char *colp;
    111 
    112   memset(bar, 0, sizeof(struct ProgressData));
    113 
    114   /* pass this through to progress function so
    115    * it can display progress towards total file
    116    * not just the part that's left. (21-may-03, dbyron) */
    117   if(config->use_resume)
    118     bar->initial_size = config->resume_from;
    119 
    120 /* TODO: get terminal width through ansi escapes or something similar.
    121    try to update width when xterm is resized... - 19990617 larsa */
    122 #ifndef __EMX__
    123   /* 20000318 mgs
    124    * OS/2 users most likely won't have this env var set, and besides that
    125    * we're using our own way to determine screen width */
    126   colp = curlx_getenv("COLUMNS");
    127   if(colp) {
    128     char *endptr;
    129     long num = strtol(colp, &endptr, 10);
    130     if((endptr != colp) && (endptr == colp + strlen(colp)) && (num > 0))
    131       bar->width = (int)num;
    132     else
    133       bar->width = 79;
    134     curl_free(colp);
    135   }
    136   else
    137     bar->width = 79;
    138 #else
    139   /* 20000318 mgs
    140    * We use this emx library call to get the screen width, and subtract
    141    * one from what we got in order to avoid a problem with the cursor
    142    * advancing to the next line if we print a string that is as long as
    143    * the screen is wide. */
    144 
    145   _scrsize(scr_size);
    146   bar->width = scr_size[0] - 1;
    147 #endif
    148 
    149   bar->out = config->global->errors;
    150 }
    151