Explicitly test time difference is greater than zero

[pacman-ng.git] / src / pacman / callback.c

/*
 *  callback.c
 *
 *  Copyright (c) 2006-2010 Pacman Development Team <pacman-dev@archlinux.org>
 *  Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "config.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <sys/types.h> /* off_t */
#include <unistd.h>
#include <wchar.h>

#include <alpm.h>

/* pacman */
#include "callback.h"
#include "util.h"
#include "conf.h"

/* download progress bar */
static float rate_last;
static off_t xfered_last;
static off_t list_xfered = 0.0;
static off_t list_total = 0.0;
static struct timeval initial_time;

/* transaction progress bar */
static int prevpercent = 0; /* for less progressbar output */

/* delayed output during progress bar */
static int on_progress = 0;
static alpm_list_t *output = NULL;

/* Silly little helper function, determines if the caller needs a visual update
 * since the last time this function was called.
 * This is made for the two progress bar functions, to prevent flicker
 *
 * first_call indicates if this is the first time it is called, for
 * initialization purposes */
static float get_update_timediff(int first_call)
{
        float retval = 0.0;
        static struct timeval last_time = {0, 0};

        /* on first call, simply set the last time and return */
        if(first_call) {
                gettimeofday(&last_time, NULL);
        } else {
                struct timeval this_time;
                float diff_sec, diff_usec;

                gettimeofday(&this_time, NULL);
                diff_sec = this_time.tv_sec - last_time.tv_sec;
                diff_usec = this_time.tv_usec - last_time.tv_usec;

                retval = diff_sec + (diff_usec / 1000000.0);

                /* return 0 and do not update last_time if interval was too short */
                if(retval < UPDATE_SPEED_SEC) {
                        retval = 0.0;
                } else {
                        last_time = this_time;
                        /* printf("\nupdate retval: %f\n", retval); DEBUG*/
                }
        }

        return(retval);
}

/* refactored from cb_trans_progress */
static void fill_progress(const int bar_percent, const int disp_percent,
                const int proglen)
{
        /* 8 = 1 space + 1 [ + 1 ] + 5 for percent */
        const int hashlen = proglen - 8;
        const int hash = bar_percent * hashlen / 100;
        static int lasthash = 0, mouth = 0;
        int i;

        if(bar_percent == 0) {
                lasthash = 0;
                mouth = 0;
        }

        if(hashlen > 0) {
                printf(" [");
                for(i = hashlen; i > 0; --i) {
                        /* if special progress bar enabled */
                        if(config->chomp) {
                                if(i > hashlen - hash) {
                                        printf("-");
                                } else if(i == hashlen - hash) {
                                        if(lasthash == hash) {
                                                if(mouth) {
                                                        printf("\033[1;33mC\033[m");
                                                } else {
                                                        printf("\033[1;33mc\033[m");
                                                }
                                        } else {
                                                lasthash = hash;
                                                mouth = mouth == 1 ? 0 : 1;
                                                if(mouth) {
                                                        printf("\033[1;33mC\033[m");
                                                } else {
                                                        printf("\033[1;33mc\033[m");
                                                }
                                        }
                                } else if(i%3 == 0) {
                                        printf("\033[0;37mo\033[m");
                                } else {
                                        printf("\033[0;37m \033[m");
                                }
                        } /* else regular progress bar */
                        else if(i > hashlen - hash) {
                                printf("#");
                        } else {
                                printf("-");
                        }
                }
                printf("]");
        }
        /* print display percent after progress bar */
        /* 5 = 1 space + 3 digits + 1 % */
        if(proglen >= 5) {
                printf(" %3d%%", disp_percent);
        }

        if(bar_percent == 100) {
                printf("\n");
        } else {
                printf("\r");
        }
        fflush(stdout);
}



/* callback to handle messages/notifications from libalpm transactions */
void cb_trans_evt(pmtransevt_t event, void *data1, void *data2)
{
        switch(event) {
                case PM_TRANS_EVT_CHECKDEPS_START:
                  printf(_("checking dependencies...\n"));
                        break;
                case PM_TRANS_EVT_FILECONFLICTS_START:
                        if(config->noprogressbar) {
                        printf(_("checking for file conflicts...\n"));
                        }
                        break;
                case PM_TRANS_EVT_RESOLVEDEPS_START:
                        printf(_("resolving dependencies...\n"));
                        break;
                case PM_TRANS_EVT_INTERCONFLICTS_START:
                        printf(_("looking for inter-conflicts...\n"));
                        break;
                case PM_TRANS_EVT_ADD_START:
                        if(config->noprogressbar) {
                                printf(_("installing %s...\n"), alpm_pkg_get_name(data1));
                        }
                        break;
                case PM_TRANS_EVT_ADD_DONE:
                        alpm_logaction("installed %s (%s)\n",
                                 alpm_pkg_get_name(data1),
                                 alpm_pkg_get_version(data1));
                        display_optdepends(data1);
                        break;
                case PM_TRANS_EVT_REMOVE_START:
                        if(config->noprogressbar) {
                        printf(_("removing %s...\n"), alpm_pkg_get_name(data1));
                        }
                        break;
                case PM_TRANS_EVT_REMOVE_DONE:
                        alpm_logaction("removed %s (%s)\n",
                                 alpm_pkg_get_name(data1),
                                 alpm_pkg_get_version(data1));
                        break;
                case PM_TRANS_EVT_UPGRADE_START:
                        if(config->noprogressbar) {
                                printf(_("upgrading %s...\n"), alpm_pkg_get_name(data1));
                        }
                        break;
                case PM_TRANS_EVT_UPGRADE_DONE:
                        alpm_logaction("upgraded %s (%s -> %s)\n",
                                 (char *)alpm_pkg_get_name(data1),
                                 (char *)alpm_pkg_get_version(data2),
                                 (char *)alpm_pkg_get_version(data1));
                        display_new_optdepends(data2,data1);
                        break;
                case PM_TRANS_EVT_INTEGRITY_START:
                        printf(_("checking package integrity...\n"));
                        break;
                case PM_TRANS_EVT_DELTA_INTEGRITY_START:
                        printf(_("checking delta integrity...\n"));
                        break;
                case PM_TRANS_EVT_DELTA_PATCHES_START:
                        printf(_("applying deltas...\n"));
                        break;
                case PM_TRANS_EVT_DELTA_PATCH_START:
                        printf(_("generating %s with %s... "), (char *)data1, (char *)data2);
                        break;
                case PM_TRANS_EVT_DELTA_PATCH_DONE:
                        printf(_("success!\n"));
                        break;
                case PM_TRANS_EVT_DELTA_PATCH_FAILED:
                        printf(_("failed.\n"));
                        break;
                case PM_TRANS_EVT_SCRIPTLET_INFO:
                        printf("%s", (char*)data1);
                        break;
                case PM_TRANS_EVT_RETRIEVE_START:
                        printf(_(":: Retrieving packages from %s...\n"), (char*)data1);
                        break;
                case PM_TRANS_EVT_DISKSPACE_START:
                        if(config->noprogressbar) {
                                printf(_("checking available disk space...\n"));
                        }
                        break;
                /* all the simple done events, with fallthrough for each */
                case PM_TRANS_EVT_FILECONFLICTS_DONE:
                case PM_TRANS_EVT_CHECKDEPS_DONE:
                case PM_TRANS_EVT_RESOLVEDEPS_DONE:
                case PM_TRANS_EVT_INTERCONFLICTS_DONE:
                case PM_TRANS_EVT_INTEGRITY_DONE:
                case PM_TRANS_EVT_DELTA_INTEGRITY_DONE:
                case PM_TRANS_EVT_DELTA_PATCHES_DONE:
                case PM_TRANS_EVT_DISKSPACE_DONE:
                        /* nothing */
                        break;
        }
        fflush(stdout);
}

/* callback to handle questions from libalpm transactions (yes/no) */
/* TODO this is one of the worst ever functions written. void *data ? wtf */
void cb_trans_conv(pmtransconv_t event, void *data1, void *data2,
                   void *data3, int *response)
{
        switch(event) {
                case PM_TRANS_CONV_INSTALL_IGNOREPKG:
                        *response = yesno(_(":: %s is in IgnorePkg/IgnoreGroup. Install anyway?"),
                                                          alpm_pkg_get_name(data1));
                        break;
                case PM_TRANS_CONV_REPLACE_PKG:
                        *response = yesno(_(":: Replace %s with %s/%s?"),
                                        alpm_pkg_get_name(data1),
                                        (char *)data3,
                                        alpm_pkg_get_name(data2));
                        break;
                case PM_TRANS_CONV_CONFLICT_PKG:
                        /* data parameters: target package, local package, conflict (strings) */
                        /* print conflict only if it contains new information */
                        if(strcmp(data1, data3) == 0 || strcmp(data2, data3) == 0) {
                                *response = noyes(_(":: %s and %s are in conflict. Remove %s?"),
                                                (char *)data1,
                                                (char *)data2,
                                                (char *)data2);
                        } else {
                                *response = noyes(_(":: %s and %s are in conflict (%s). Remove %s?"),
                                                (char *)data1,
                                                (char *)data2,
                                                (char *)data3,
                                                (char *)data2);
                        }
                        break;
                case PM_TRANS_CONV_REMOVE_PKGS:
                        {
                                alpm_list_t *unresolved = (alpm_list_t *) data1;
                                alpm_list_t *namelist = NULL, *i;
                                for (i = unresolved; i; i = i->next) {
                                        namelist = alpm_list_add(namelist,
                                                        (char *)alpm_pkg_get_name(i->data));
                                }
                                printf(_n(
                                                        ":: The following package cannot be upgraded due to unresolvable dependencies:\n",
                                                        ":: The following packages cannot be upgraded due to unresolvable dependencies:\n",
                                                        alpm_list_count(namelist)));
                                list_display("     ", namelist);
                                printf("\n");
                                *response = noyes(_n(
                                                        "Do you want to skip the above package for this upgrade?",
                                                        "Do you want to skip the above packages for this upgrade?",
                                                        alpm_list_count(namelist)));
                                alpm_list_free(namelist);
                        }
                        break;
                case PM_TRANS_CONV_LOCAL_NEWER:
                        if(!config->op_s_downloadonly) {
                                *response = yesno(_(":: %s-%s: local version is newer. Upgrade anyway?"),
                                                alpm_pkg_get_name(data1),
                                                alpm_pkg_get_version(data1));
                        } else {
                                *response = 1;
                        }
                        break;
                case PM_TRANS_CONV_CORRUPTED_PKG:
                        *response = yesno(_(":: File %s is corrupted. Do you want to delete it?"),
                                        (char *)data1);
                        break;
        }
        if(config->noask) {
                if(config->ask & event) {
                        /* inverse the default answer */
                        *response = !*response;
                }
        }
}

/* callback to handle display of transaction progress */
void cb_trans_progress(pmtransprog_t event, const char *pkgname, int percent,
                       int howmany, int remain)
{
        float timediff;

        /* size of line to allocate for text printing (e.g. not progressbar) */
        int infolen;
        int tmp, digits, textlen;
        char *opr = NULL;
        /* used for wide character width determination and printing */
        int len, wclen, wcwid, padwid;
        wchar_t *wcstr;

        if(config->noprogressbar) {
                return;
        }

        infolen = getcols() * 6 / 10;
        if (infolen < 50) {
                infolen = 50;
        }

        if(percent == 0) {
                timediff = get_update_timediff(1);
        } else {
                timediff = get_update_timediff(0);
        }

        if(percent > 0 && percent < 100 && timediff > 0) {
                /* only update the progress bar when
                 * a) we first start
                 * b) we end the progress
                 * c) it has been long enough since the last call
                 */
                return;
        }

        /* if no pkgname, percent is too high or unchanged, then return */
        if(!pkgname || percent == prevpercent) {
                return;
        }

        prevpercent=percent;
        /* set text of message to display */
        switch (event) {
                case PM_TRANS_PROGRESS_ADD_START:
                        opr = _("installing");
                        break;
                case PM_TRANS_PROGRESS_UPGRADE_START:
                        opr = _("upgrading");
                        break;
                case PM_TRANS_PROGRESS_REMOVE_START:
                        opr = _("removing");
                        break;
                case PM_TRANS_PROGRESS_CONFLICTS_START:
                        opr = _("checking for file conflicts");
                        break;
                case PM_TRANS_PROGRESS_DISKSPACE_START:
                        opr = _("checking available disk space");
                        break;
                default:
                        return;
        }

        /* find # of digits in package counts to scale output */
        digits = 1;
        tmp = howmany;
        while((tmp /= 10)) {
                ++digits;
        }
        /* determine room left for non-digits text [not ( 1/12) part] */
        textlen = infolen - 3 /* (/) */ - (2 * digits) - 1 /* space */;

        /* In order to deal with characters from all locales, we have to worry
         * about wide characters and their column widths. A lot of stuff is
         * done here to figure out the actual number of screen columns used
         * by the output, and then pad it accordingly so we fill the terminal.
         */
        /* len = opr len + pkgname len (if available) + space  + null */
        len = strlen(opr) + ((pkgname) ? strlen(pkgname) : 0) + 2;
        wcstr = calloc(len, sizeof(wchar_t));
        /* print our strings to the alloc'ed memory */
#if defined(HAVE_SWPRINTF)
        wclen = swprintf(wcstr, len, L"%s %s", opr, pkgname);
#else
        /* because the format string was simple, we can easily do this without
         * using swprintf, although it is probably not as safe/fast. The max
         * chars we can copy is decremented each time by subtracting the length
         * of the already printed/copied wide char string. */
        wclen = mbstowcs(wcstr, opr, len);
        wclen += mbstowcs(wcstr + wclen, " ", len - wclen);
        wclen += mbstowcs(wcstr + wclen, pkgname, len - wclen);
#endif
        wcwid = wcswidth(wcstr, wclen);
        padwid = textlen - wcwid;
        /* if padwid is < 0, we need to trim the string so padwid = 0 */
        if(padwid < 0) {
                int i = textlen - 3;
                wchar_t *p = wcstr;
                /* grab the max number of char columns we can fill */
                while(i > 0 && wcwidth(*p) < i) {
                        i -= wcwidth(*p);
                        p++;
                }
                /* then add the ellipsis and fill out any extra padding */
                wcscpy(p, L"...");
                padwid = i;

        }

        printf("(%*d/%*d) %ls%-*s", digits, remain, digits, howmany,
                        wcstr, padwid, "");

        free(wcstr);

        /* call refactored fill progress function */
        fill_progress(percent, percent, getcols() - infolen);

        if(percent == 100) {
                alpm_list_t *i = NULL;
                on_progress = 0;
                for(i = output; i; i = i->next) {
                        printf("%s", (char *)i->data);
                }
                fflush(stdout);
                FREELIST(output);
        } else {
                on_progress = 1;
        }
}

/* callback to handle receipt of total download value */
void cb_dl_total(off_t total)
{
        list_total = total;
        /* if we get a 0 value, it means this list has finished downloading,
         * so clear out our list_xfered as well */
        if(total == 0) {
                list_xfered = 0;
        }
}

/* callback to handle display of download progress */
void cb_dl_progress(const char *filename, off_t file_xfered, off_t file_total)
{
        int infolen;
        int filenamelen;
        char *fname, *p;
        /* used for wide character width determination and printing */
        int len, wclen, wcwid, padwid;
        wchar_t *wcfname;

        int totaldownload = 0;
        off_t xfered, total;
        float rate = 0.0, timediff = 0.0, f_xfered = 0.0;
        unsigned int eta_h = 0, eta_m = 0, eta_s = 0;
        int file_percent = 0, total_percent = 0;
        char rate_size = 'K', xfered_size = 'K';

        if(config->noprogressbar || file_total == -1) {
                if(file_xfered == 0) {
                        printf(_("downloading %s...\n"), filename);
                        fflush(stdout);
                }
                return;
        }

        infolen = getcols() * 6 / 10;
        if (infolen < 50) {
                infolen = 50;
        }
        /* explanation of magic 28 number at the end */
        filenamelen = infolen - 28;

        /* only use TotalDownload if enabled and we have a callback value */
        if(config->totaldownload && list_total) {
                /* sanity check */
                if(list_xfered + file_total <= list_total) {
                        totaldownload = 1;
                } else {
                        /* bogus values : don't enable totaldownload and reset */
                        list_xfered = 0;
                        list_total = 0;
                }
        }

        if(totaldownload) {
                xfered = list_xfered + file_xfered;
                total = list_total;
        } else {
                xfered = file_xfered;
                total = file_total;
        }

        /* bogus values : stop here */
        if(xfered > total) {
                return;
        }

        /* this is basically a switch on xfered: 0, total, and
         * anything else */
        if(file_xfered == 0) {
                /* set default starting values, ensure we only call this once
                 * if TotalDownload is enabled */
                if(!totaldownload || (totaldownload && list_xfered == 0)) {
                        gettimeofday(&initial_time, NULL);
                        xfered_last = (off_t)0;
                        rate_last = 0.0;
                        get_update_timediff(1);
                }
        } else if(file_xfered == file_total) {
                /* compute final values */
                struct timeval current_time;
                float diff_sec, diff_usec;

                gettimeofday(&current_time, NULL);
                diff_sec = current_time.tv_sec - initial_time.tv_sec;
                diff_usec = current_time.tv_usec - initial_time.tv_usec;
                timediff = diff_sec + (diff_usec / 1000000.0);
                rate = xfered / (timediff * 1024.0);

                /* round elapsed time to the nearest second */
                eta_s = (int)(timediff + 0.5);
        } else {
                /* compute current average values */
                timediff = get_update_timediff(0);

                if(timediff < UPDATE_SPEED_SEC) {
                        /* return if the calling interval was too short */
                        return;
                }
                rate = (xfered - xfered_last) / (timediff * 1024.0);
                /* average rate to reduce jumpiness */
                rate = (rate + 2 * rate_last) / 3;
                eta_s = (total - xfered) / (rate * 1024.0);
                rate_last = rate;
                xfered_last = xfered;
        }

        file_percent = (int)((float)file_xfered) / ((float)file_total) * 100;

        if(totaldownload) {
                total_percent = (int)((float)list_xfered + file_xfered) /
                        ((float)list_total) * 100;

                /* if we are at the end, add the completed file to list_xfered */
                if(file_xfered == file_total) {
                        list_xfered += file_total;
                }
        }

        /* fix up time for display */
        eta_h = eta_s / 3600;
        eta_s -= eta_h * 3600;
        eta_m = eta_s / 60;
        eta_s -= eta_m * 60;

        fname = strdup(filename);
        /* strip package or DB extension for cleaner look */
        if((p = strstr(fname, ".pkg")) || (p = strstr(fname, ".db"))) {
                        *p = '\0';
        }
        /* In order to deal with characters from all locales, we have to worry
         * about wide characters and their column widths. A lot of stuff is
         * done here to figure out the actual number of screen columns used
         * by the output, and then pad it accordingly so we fill the terminal.
         */
        /* len = filename len + null */
        len = strlen(filename) + 1;
        wcfname = calloc(len, sizeof(wchar_t));
        wclen = mbstowcs(wcfname, fname, len);
        wcwid = wcswidth(wcfname, wclen);
        padwid = filenamelen - wcwid;
        /* if padwid is < 0, we need to trim the string so padwid = 0 */
        if(padwid < 0) {
                int i = filenamelen - 3;
                wchar_t *p = wcfname;
                /* grab the max number of char columns we can fill */
                while(i > 0 && wcwidth(*p) < i) {
                        i -= wcwidth(*p);
                        p++;
                }
                /* then add the ellipsis and fill out any extra padding */
                wcscpy(p, L"...");
                padwid = i;

        }

        /* Awesome formatting for progress bar.  We need a mess of Kb->Mb->Gb stuff
         * here. We'll use limit of 2048 for each until we get some empirical */
        /* rate_size = 'K'; was set above */
        if(rate > 2048.0) {
                rate /= 1024.0;
                rate_size = 'M';
                if(rate > 2048.0) {
                        rate /= 1024.0;
                        rate_size = 'G';
                        /* we should not go higher than this for a few years (9999.9 Gb/s?)*/
                }
        }

        f_xfered = xfered / 1024.0; /* convert to K by default */
        /* xfered_size = 'K'; was set above */
        if(f_xfered > 2048.0) {
                f_xfered /= 1024.0;
                xfered_size = 'M';
                if(f_xfered > 2048.0) {
                        f_xfered /= 1024.0;
                        xfered_size = 'G';
                        /* I should seriously hope that archlinux packages never break
                         * the 9999.9GB mark... we'd have more serious problems than the progress
                         * bar in pacman */
                }
        }

        /* 1 space + filenamelen + 1 space + 7 for size + 1 + 7 for rate + 2 for /s + 1 space + 8 for eta */
        printf(" %ls%-*s %6.1f%c %#6.1f%c/s %02u:%02u:%02u", wcfname,
                        padwid, "", f_xfered, xfered_size,
                        rate, rate_size, eta_h, eta_m, eta_s);

        free(fname);
        free(wcfname);

        if(totaldownload) {
                fill_progress(file_percent, total_percent, getcols() - infolen);
        } else {
                fill_progress(file_percent, file_percent, getcols() - infolen);
        }
        return;
}

/* Callback to handle notifications from the library */
void cb_log(pmloglevel_t level, char *fmt, va_list args)
{
        if(!fmt || strlen(fmt) == 0) {
                return;
        }

        if(on_progress) {
                char *string = NULL;
                pm_vasprintf(&string, level, fmt, args);
                if(string != NULL) {
                        output = alpm_list_add(output, string);
                }
        } else {
                pm_vfprintf(stdout, level, fmt, args);
        }
}

/* vim: set ts=2 sw=2 noet: */