X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fcutils.c;h=995524400e13c02be1bb276c9d8a5758b6b273ec;hb=4e8d6218c3cb8b9feffb70f8a53859540b975b36;hp=ce2c8452265d15eb1e273db30a84c26b7b050686;hpb=abac6175916c57f59ddb51ffe41bfd1d9851fe38;p=ffmpeg

diff --git a/libavformat/cutils.c b/libavformat/cutils.c
index ce2c8452265..995524400e1 100644
--- a/libavformat/cutils.c
+++ b/libavformat/cutils.c
@@ -1,110 +1,78 @@
 /*
- * Various simple utilities for ffmpeg system
+ * various simple utilities for libavformat
  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
  *
- * This library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
  *
- * This library is distributed in the hope that it will be useful,
+ * Libav 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #include "avformat.h"
-#include <ctype.h>
+#include "internal.h"
 
-#if !defined(CONFIG_NOCUTILS)
-/**
- * Return TRUE if val is a prefix of str. If it returns TRUE, ptr is
- * set to the next character in 'str' after the prefix.
- *
- * @param str input string
- * @param val prefix to test
- * @param ptr updated after the prefix in str in there is a match
- * @return TRUE if there is a match
- */
-int strstart(const char *str, const char *val, const char **ptr)
+/* add one element to a dynamic array */
+void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem)
 {
-    const char *p, *q;
-    p = str;
-    q = val;
-    while (*q != '\0') {
-        if (*p != *q)
-            return 0;
-        p++;
-        q++;
-    }
-    if (ptr)
-        *ptr = p;
-    return 1;
-}
+    /* see similar avconv.c:grow_array() */
+    int nb, nb_alloc;
+    intptr_t *tab;
 
-/**
- * Return TRUE if val is a prefix of str (case independent). If it
- * returns TRUE, ptr is set to the next character in 'str' after the
- * prefix.
- *
- * @param str input string
- * @param val prefix to test
- * @param ptr updated after the prefix in str in there is a match
- * @return TRUE if there is a match */
-int stristart(const char *str, const char *val, const char **ptr)
-{
-    const char *p, *q;
-    p = str;
-    q = val;
-    while (*q != '\0') {
-        if (toupper(*(unsigned char *)p) != toupper(*(unsigned char *)q))
-            return 0;
-        p++;
-        q++;
+    nb = *nb_ptr;
+    tab = *tab_ptr;
+    if ((nb & (nb - 1)) == 0) {
+        if (nb == 0)
+            nb_alloc = 1;
+        else
+            nb_alloc = nb * 2;
+        tab = av_realloc(tab, nb_alloc * sizeof(intptr_t));
+        *tab_ptr = tab;
     }
-    if (ptr)
-        *ptr = p;
-    return 1;
+    tab[nb++] = elem;
+    *nb_ptr = nb;
 }
 
-/**
- * Copy the string str to buf. If str length is bigger than buf_size -
- * 1 then it is clamped to buf_size - 1.
- * NOTE: this function does what strncpy should have done to be
- * useful. NEVER use strncpy.
- * 
- * @param buf destination buffer
- * @param buf_size size of destination buffer
- * @param str source string
- */
-void pstrcpy(char *buf, int buf_size, const char *str)
+#define ISLEAP(y) (((y) % 4 == 0) && (((y) % 100) != 0 || ((y) % 400) == 0))
+#define LEAPS_COUNT(y) ((y)/4 - (y)/100 + (y)/400)
+
+/* This is our own gmtime_r. It differs from its POSIX counterpart in a
+   couple of places, though. */
+struct tm *brktimegm(time_t secs, struct tm *tm)
 {
-    int c;
-    char *q = buf;
+    int days, y, ny, m;
+    int md[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
 
-    if (buf_size <= 0)
-        return;
+    days = secs / 86400;
+    secs %= 86400;
+    tm->tm_hour = secs / 3600;
+    tm->tm_min = (secs % 3600) / 60;
+    tm->tm_sec =  secs % 60;
 
-    for(;;) {
-        c = *str++;
-        if (c == 0 || q >= buf + buf_size - 1)
-            break;
-        *q++ = c;
+    /* oh well, may be someone some day will invent a formula for this stuff */
+    y = 1970; /* start "guessing" */
+    while (days > 365) {
+        ny = (y + days/366);
+        days -= (ny - y) * 365 + LEAPS_COUNT(ny - 1) - LEAPS_COUNT(y - 1);
+        y = ny;
     }
-    *q = '\0';
-}
+    if (days==365 && !ISLEAP(y)) { days=0; y++; }
+    md[1] = ISLEAP(y)?29:28;
+    for (m=0; days >= md[m]; m++)
+         days -= md[m];
 
-/* strcat and truncate. */
-char *pstrcat(char *buf, int buf_size, const char *s)
-{
-    int len;
-    len = strlen(buf);
-    if (len < buf_size) 
-        pstrcpy(buf + len, buf_size - len, s);
-    return buf;
-}
+    tm->tm_year = y;  /* unlike gmtime_r we store complete year here */
+    tm->tm_mon = m+1; /* unlike gmtime_r tm_mon is from 1 to 12 */
+    tm->tm_mday = days+1;
 
-#endif
+    return tm;
+}