mirror of
https://github.com/fluencelabs/musl
synced 2025-05-04 19:42:15 +00:00
28 lines
451 B
C
28 lines
451 B
C
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#define GUESS 240U
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int vasprintf(char **s, const char *fmt, va_list ap)
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{
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va_list ap2;
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char *a;
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int l=GUESS;
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if (!(a=malloc(GUESS))) return -1;
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va_copy(ap2, ap);
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l=vsnprintf(a, GUESS, fmt, ap2);
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va_end(ap2);
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if (l<GUESS) {
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char *b = realloc(a, l+1U);
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*s = b ? b : a;
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return l;
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}
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free(a);
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if (l<0 || !(*s=malloc(l+1U))) return -1;
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return vsnprintf(*s, l+1U, fmt, ap);
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}
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