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libmpg123 1.15.4

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git-svn-id: svn://kolibrios.org@3960 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge)
2013-10-02 16:44:03 +00:00
parent 44d189b67c
commit 2217a37e5b
68 changed files with 11403 additions and 1285 deletions
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57
programs/develop/libraries/libmpg123/stringbuf.c
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@@ -1,7 +1,7 @@
/*
stringbuf: mimicking a bit of C++ to more safely handle strings
copyright 2006-8 by the mpg123 project - free software under the terms of the LGPL 2.1
copyright 2006-10 by the mpg123 project - free software under the terms of the LGPL 2.1
see COPYING and AUTHORS files in distribution or http://mpg123.org
initially written by Thomas Orgis
*/
@@ -129,3 +129,58 @@ int attribute_align_arg mpg123_set_string(mpg123_string* sb, const char* stuff)
sb->fill = 0;
return mpg123_add_string(sb, stuff);
}
size_t attribute_align_arg mpg123_strlen(mpg123_string *sb, int utf8)
{
size_t i;
size_t bytelen;
/* Notions of empty string. If there's only a single character, it has to be the trailing zero, and if the first is the trailing zero anyway, we got empty. */
if(sb->fill < 2 || sb->p[0] == 0) return 0;
/* Find the first non-null character from the back.
We already established that the first character is non-null
That at fill-2 has to be null, though. */
for(i=sb->fill-2; i>0; --i)
if(sb->p[i] != 0) break;
/* For simple byte strings, we are done now. */
bytelen = i+1;
if(!utf8) return bytelen;
else
{
/* Work out the actual count of UTF8 bytes.
This employs no particular encoding error checking. */
size_t len = 0;
for(i=0; i<bytelen; ++i)
{
/* Every byte that is not a continuation byte ( 0xc0 == 10xx xxxx ) stands for a character. */
if((sb->p[i] & 0xc0) != 0x80) len++;
}
return len;
}
}
int attribute_align_arg mpg123_chomp_string(mpg123_string *sb)
{
ssize_t i;
if(!sb || !sb->fill) return 0;
/* Ensure that it is zero-terminated. */
sb->p[sb->fill-1] = 0;
for(i=sb->fill-2; i>=0; --i)
{
char *c = sb->p+i;
/* Stop at the first proper character. */
if(*c && *c != '\r' && *c != '\n') break;
else *c = 0;
}
/* initial fill at least 1, so i at least -1,
+2 means nothing happened for fill=1 .
With i=0, we got one non-null character, fill shall be 2
to accomodate the trailing zero. */
sb->fill = (size_t)i+2;
return 1;
}