42 lines
1002 B
C
42 lines
1002 B
C
// By aaronwl 2003-01-28 for mingw-msvcrt.
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// Public domain: all copyrights disclaimed, absolutely no warranties.
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#include <stdarg.h>
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#include <stdio.h>
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int vsscanf(const char * __restrict__ s, const char * __restrict__ format, va_list arg) {
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int ret;
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__asm__(
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// allocate stack (esp += frame - arg3 - (8[arg1,2] + 12))
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"movl %%esp, %%ebx\n\t"
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"lea 0xFFFFFFEC(%%esp, %6), %%esp\n\t"
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"subl %5, %%esp\n\t"
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// set up stack
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"movl %1, 0xC(%%esp)\n\t" // s
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"movl %2, 0x10(%%esp)\n\t" // format
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"lea 0x14(%%esp), %%edi\n\t"
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"movl %%edi, (%%esp)\n\t" // memcpy dest
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"movl %5, 0x4(%%esp)\n\t" // memcpy src
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"movl %5, 0x8(%%esp)\n\t"
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"subl %6, 0x8(%%esp)\n\t" // memcpy len
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"call _memcpy\n\t"
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"addl $12, %%esp\n\t"
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// call sscanf
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"call _sscanf\n\t"
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// restore stack
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"movl %%ebx, %%esp\n\t"
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: "=a"(ret), "=c"(s), "=d"(format)
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: "1"(s), "2"(format), "S"(arg),
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"a"(&ret)
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: "ebx", "edi");
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return ret;
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}
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