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23 lines
588 B
Markdown
23 lines
588 B
Markdown
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---
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title: "mg_avprintf()"
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decl_name: "mg_avprintf"
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symbol_kind: "func"
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signature: |
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int mg_avprintf(char **buf, size_t size, const char *fmt, va_list ap);
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---
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Print message to buffer. If buffer is large enough to hold the message,
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return buffer. If buffer is to small, allocate large enough buffer on heap,
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and return allocated buffer.
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This is a supposed use case:
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char buf[5], *p = buf;
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p = mg_avprintf(&p, sizeof(buf), "%s", "hi there");
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use_p_somehow(p);
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if (p != buf) {
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free(p);
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}
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The purpose of this is to avoid malloc-ing if generated strings are small.
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