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/*
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 * Simple C functions to supplement the C library
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 *
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 * Copyright (c) 2006 Fabrice Bellard
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy
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 * of this software and associated documentation files (the "Software"), to deal
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 * in the Software without restriction, including without limitation the rights
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 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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 * copies of the Software, and to permit persons to whom the Software is
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 * furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included in
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 * all copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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 * THE SOFTWARE.
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 */
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#include "vl.h"
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void pstrcpy(char *buf, int buf_size, const char *str)
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{
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    int c;
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    char *q = buf;
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    if (buf_size <= 0)
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        return;
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    for(;;) {
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        c = *str++;
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        if (c == 0 || q >= buf + buf_size - 1)
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            break;
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        *q++ = c;
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    }
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    *q = '\0';
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}
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/* strcat and truncate. */
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char *pstrcat(char *buf, int buf_size, const char *s)
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{
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    int len;
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    len = strlen(buf);
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    if (len < buf_size)
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        pstrcpy(buf + len, buf_size - len, s);
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    return buf;
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}
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int strstart(const char *str, const char *val, const char **ptr)
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{
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    const char *p, *q;
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    p = str;
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    q = val;
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    while (*q != '\0') {
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        if (*p != *q)
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            return 0;
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        p++;
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        q++;
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    }
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    if (ptr)
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        *ptr = p;
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    return 1;
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}
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int stristart(const char *str, const char *val, const char **ptr)
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{
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    const char *p, *q;
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    p = str;
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    q = val;
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    while (*q != '\0') {
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        if (toupper(*p) != toupper(*q))
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            return 0;
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        p++;
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        q++;
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    }
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    if (ptr)
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        *ptr = p;
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    return 1;
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}
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time_t mktimegm(struct tm *tm)
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{
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    time_t t;
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    int y = tm->tm_year + 1900, m = tm->tm_mon + 1, d = tm->tm_mday;
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    if (m < 3) {
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        m += 12;
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        y--;
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    }
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    t = 86400 * (d + (153 * m - 457) / 5 + 365 * y + y / 4 - y / 100 + 
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                 y / 400 - 719469);
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    t += 3600 * tm->tm_hour + 60 * tm->tm_min + tm->tm_sec;
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    return t;
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}