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24 lines
679 B
C
24 lines
679 B
C
#include "fmt.h"
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/* "foo" -> "foo "
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* append padlen-srclen spaces after dest, if that is >= 0. Truncate
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* only if total length is larger than maxlen. Return number of
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* characters written. */
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size_t fmt_fill(char* dest,size_t srclen,size_t padlen,size_t maxlen) {
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long todo;
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char* olddest=dest;
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char* max=dest+maxlen;
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if ((long)padlen<0 || (long)maxlen<0) return 0;
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if (srclen>maxlen) return maxlen;
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if (dest==0) {
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unsigned long sum=srclen>padlen?srclen:padlen;
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return sum>maxlen?maxlen:sum;
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}
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dest+=srclen;
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for (todo=(long)(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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return (size_t)(dest-olddest);
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}
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