src/lib/strbuf.c - master - githubmirror/libreport

src/lib/strbuf.c
147 строк4 KB
Michal Fabik
Simplify malloc arguments
22 сен 2020, 15:11
22 сен 2020, 15:11feb6bbe
/*
    String buffer implementation

    Copyright (C) 2009  RedHat inc.

    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, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "internal_libreport.h"

char *libreport_trim_all_whitespace(const char *str)
{
    char *trim = g_malloc0(strlen(str) + 1);
    int i = 0;
    while (*str)
    {
        if (!isspace(*str))
            trim[i++] = *str;
        str++;
    }

    return trim;
}

/* If str is longer than max allowed length then
 * try to find first ' ' from the end of acceptable long str string
 *
 * If ' ' is found replace string after that by "..."
 *
 * If ' ' is NOT found in maximal allowed range, cut str string on
 * lenght (MAX_SUMMARY_LENGTH - strlen("...")) and append "..."
 *
 * If MAX_LENGTH is 15 and max allowed cut is 5:
 *
 *   0123456789ABCDEF -> 0123456789AB...
 *   0123456789 BCDEF -> 0123456789 ...
 *   012345 789ABCDEF -> 012345 789AB...
 */
char *libreport_shorten_string_to_length(const char *str, unsigned length)
{
    char *dup_str = g_strdup(str);
    if (strlen(str) > length)
    {
        char *max_end = dup_str + (length - strlen("..."));

        /* maximal number of characters to cut due to attempt cut dup_str
         * string after last ' '
         */
        int max_cut = 16;

        /* start looking for ' ' one char before the last possible character */
        char *buf = max_end - 1;
        while (buf[0] != ' ' && max_cut--)
            --buf;

        if (buf[0] != ' ')
            buf = max_end;
        else
            ++buf;

        buf[0] = '.';
        buf[1] = '.';
        buf[2] = '.';
        buf[3] = '\0';
    }

    return dup_str;
}

/*
 * Trims characters both from left and right side of a string.
 * Modifies the string in-place. Returns the trimmed string.
 */
char *libreport_strtrimch(char *str, int ch)
{
    if (!str)
        return NULL;

    /* Remove leading characters */
    char *tmp = str;
    while (*tmp == ch)
        ++tmp;
    libreport_overlapping_strcpy(str, tmp);

    /* Remove trailing characters */
    int i = strlen(str);
    while (--i >= 0)
    {
        if (str[i] != ch)
            break;
    }
    str[++i] = '\0';
    return str;
}

/*
 * Removes character from a string.
 * Modifies the string in-place. Returns the updated string.
 */
char *libreport_strremovech(char *str, int ch)
{
    char *ret = str;
    char *res = str;
    for ( ; *str != '\0'; ++str)
        if (*str != ch)
            *(res++) = *str;

    *res = '\0';
    return ret;
}


GString *libreport_strbuf_append_strfv(GString *strbuf, const char *format, va_list p)
{
    g_autofree char *string_ptr = libreport_xvasprintf(format, p);
    g_string_append(strbuf, string_ptr);
    return strbuf;
}

GString *libreport_strbuf_prepend_strfv(GString *strbuf, const char *format, va_list p)
{
    g_autofree char *string_ptr = libreport_xvasprintf(format, p);
    g_string_prepend(strbuf, string_ptr);
    return strbuf;
}

GString *libreport_strbuf_prepend_strf(GString *strbuf, const char *format, ...)
{
    va_list p;

    va_start(p, format);
    libreport_strbuf_prepend_strfv(strbuf, format, p);
    va_end(p);

    return strbuf;
}