Coverage Report

Created: 2024-07-23 06:24

/src/pjsip/pjlib/src/pj/guid_simple.c
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Source (jump to first uncovered line)
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/* 
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 * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
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 * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
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 */
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#include <pj/guid.h>
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#include <pj/assert.h>
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#include <pj/rand.h>
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#include <pj/os.h>
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#include <pj/string.h>
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PJ_DEF_DATA(const unsigned) PJ_GUID_STRING_LENGTH=32;
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static char guid_chars[64];
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PJ_DEF(unsigned) pj_GUID_STRING_LENGTH()
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0
{
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0
    return PJ_GUID_STRING_LENGTH;
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0
}
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static void init_guid_chars(void)
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1
{
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1
    char *p = guid_chars;
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1
    unsigned i;
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    for (i=0; i<10; ++i)
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10
        *p++ = '0'+i;
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    for (i=0; i<26; ++i) {
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        *p++ = 'a'+i;
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        *p++ = 'A'+i;
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    }
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1
    *p++ = '-';
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1
    *p++ = '.';
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1
}
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PJ_DEF(pj_str_t*) pj_generate_unique_string(pj_str_t *str)
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1
{
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1
    char *p, *end;
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1
    PJ_CHECK_STACK();
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1
    if (guid_chars[0] == '\0') {
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1
        pj_enter_critical_section();
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1
        if (guid_chars[0] == '\0') {
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1
            init_guid_chars();
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1
        }
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1
        pj_leave_critical_section();
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1
    }
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    /* This would only work if PJ_GUID_STRING_LENGTH is multiple of 2 bytes */
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1
    pj_assert(PJ_GUID_STRING_LENGTH % 2 == 0);
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    for (p=str->ptr, end=p+PJ_GUID_STRING_LENGTH; p<end; ) {
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8
        pj_uint32_t rand_val = pj_rand();
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        pj_uint32_t rand_idx = RAND_MAX;
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        for ( ; rand_idx>0 && p<end; rand_idx>>=8, rand_val>>=8, p++) {
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            *p = guid_chars[(rand_val & 0xFF) & 63];
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        }
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    }
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1
    str->slen = PJ_GUID_STRING_LENGTH;
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1
    return str;
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1
}
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