21 lines
619 B
C
21 lines
619 B
C
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#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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for (todo=padlen-srclen; 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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