Mirror of :pserver:cvs@cvs.fefe.de:/cvs libowfat https://www.fefe.de/libowfat/
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#include "fmt.h"
/* "foo" -> " foo"
* write padlen-srclen spaces, if that is >= 0. Then copy srclen
* characters from src. Truncate only if total length is larger than
* maxlen. Return number of characters written. */
size_t fmt_pad(char* dest,const char* src,size_t srclen,size_t padlen,size_t maxlen) {
long todo;
char* olddest=dest;
char* max=dest+maxlen;
if ((long)srclen<0 || (long)padlen<0 || (long)maxlen<0) return 0;
todo=(long)(padlen-srclen);
if (dest==0) {
unsigned long sum=srclen>padlen?srclen:padlen;
return sum>maxlen?maxlen:sum;
}
for (; todo>0; --todo) {
if (dest>max) break;
*dest=' '; ++dest;
}
for (todo=(long)(srclen>maxlen?maxlen:srclen); todo>0; --todo) {
if (dest>max) break;
*dest=*src; ++dest; ++src;
}
return (size_t)(dest-olddest);
}