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26 lines
719 B
C
26 lines
719 B
C
#include "fmt.h"
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/* "foo" -> " foo"
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* write padlen-srclen spaces, if that is >= 0. Then copy srclen
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* characters from src. Truncate only if total length is larger than
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* maxlen. Return number of characters written. */
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unsigned int fmt_pad(char* dest,const char* src,unsigned int srclen,unsigned int padlen,unsigned int maxlen) {
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int todo;
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char* olddest=dest;
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char* max=dest+maxlen;
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todo=padlen-srclen;
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if (dest==0) {
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int sum=srclen>padlen?srclen:padlen;
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return sum>maxlen?maxlen:sum;
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}
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for (; todo>0; --todo) {
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if (dest>max) break;
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*dest=' '; ++dest;
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}
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for (todo=srclen; todo>0; --todo) {
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if (dest>max) break;
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*dest=*src; ++dest; ++src;
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}
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return dest-olddest;
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}
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