diff options
author | pommicket <pommicket@gmail.com> | 2022-02-20 13:18:21 -0800 |
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committer | pommicket <pommicket@gmail.com> | 2022-02-20 13:18:21 -0800 |
commit | 9bc8a11afeed3569736b89754012e3ca22ee10f6 (patch) | |
tree | 5f0ec0d5c05f879b1ee86adfa654ed3ef2178d5f /05/musl-0.6.0/src/stdio/vasprintf.c | |
parent | 0f97a589b800bdb71dda05984192f0f66a52edaa (diff) |
conclusion
Diffstat (limited to '05/musl-0.6.0/src/stdio/vasprintf.c')
-rw-r--r-- | 05/musl-0.6.0/src/stdio/vasprintf.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/05/musl-0.6.0/src/stdio/vasprintf.c b/05/musl-0.6.0/src/stdio/vasprintf.c new file mode 100644 index 0000000..f2bbc7a --- /dev/null +++ b/05/musl-0.6.0/src/stdio/vasprintf.c @@ -0,0 +1,27 @@ +#include <stdio.h> +#include <stdarg.h> +#include <stdlib.h> + +#define GUESS 240U + +int vasprintf(char **s, const char *fmt, va_list ap) +{ + va_list ap2; + char *a; + int l=GUESS; + + if (!(a=malloc(GUESS))) return -1; + + va_copy(ap2, ap); + l=vsnprintf(a, GUESS, fmt, ap2); + va_end(ap2); + + if (l<GUESS) { + char *b = realloc(a, l+1U); + *s = b ? b : a; + return l; + } + free(a); + if (l<0 || !(*s=malloc(l+1U))) return -1; + return vsnprintf(*s, l+1U, fmt, ap); +} |