blob: 0e3a884efbd44c7c3e9acaa88ddb4fa1990b2b78 [file] [log] [blame]
/**
* This file has no copyright assigned and is placed in the Public Domain.
* This file is part of the mingw-w64 runtime package.
* No warranty is given; refer to the file DISCLAIMER.PD within this package.
*/
// By aaronwl 2003-01-28 for mingw-msvcrt.
// Public domain: all copyrights disclaimed, absolutely no warranties.
#include <stdarg.h>
#include <wchar.h>
#define QUOTE_(x) #x
#define QUOTE(x) QUOTE_(x)
#if defined(__arm__) || defined(_ARM_)
int __ms_vfwscanf_internal(FILE * __restrict__, const char * __restrict__, va_list);
asm("\t.text\n"
"\t.align 2\n"
"\t.thumb_func\n"
"\t.globl __ms_vfwscanf_internal\n"
"__ms_vfwscanf_internal:\n\t"
"push {r4-r7, lr}\n\t"
"mov r4, sp\n\t"
"sub r4, r4, #128\n\t"
"ldr r5, [r2]\n\t"
"add r2, r2, #4\n\t"
"ldr r6, [r2]\n\t"
"add r2, r2, #4\n\t"
"mov r3, #116\n\t"
"1: ldr r7, [r2]\n\t"
"add r2, r2, #4\n\t"
"str r7, [r4]\n\t"
"add r4, r4, #4\n\t"
"sub r3, r3, #4\n\t"
"cmp r3, #0\n\t"
"bne 1b\n\t"
"sub sp, sp, #128\n\t"
"mov r2, r5\n\t"
"mov r3, r6\n\t"
"bl " QUOTE(__MINGW_USYMBOL(fwscanf)) "\n\t"
"add sp, sp, #128\n\t"
"pop {r4-r7, pc}");
#endif /* defined(__arm__) || defined(_ARM_) */
int __ms_vfwscanf (FILE * __restrict__ stream, const wchar_t * __restrict__ format,
va_list arg) {
int ret;
#if defined(_AMD64_) || defined(__x86_64__)
__asm__ __volatile__ (
// allocate stack (esp += frame - arg3 - (8[arg1,2] + 12))
"movq %%rsp, %%rbx\n\t"
"lea 0xFFFFFFFFFFFFFFD8(%%rsp, %6), %%rsp\n\t"
"subq %5, %%rsp\n\t"
// set up stack
"movq %1, 0x18(%%rsp)\n\t" // stream
"movq %2, 0x20(%%rsp)\n\t" // format
"lea 0x28(%%rsp), %%rdi\n\t"
"movq %%rdi, (%%rsp)\n\t" // memcpy dest
"movq %5, 0x8(%%rsp)\n\t" // memcpy src
"movq %5, 0x10(%%rsp)\n\t"
"subq %6, 0x10(%%rsp)\n\t" // memcpy len
"movq 0x10(%%rsp), %%r8\n\t"
"movq 0x8(%%rsp), %%rdx\n\t"
"movq (%%rsp), %%rcx\n\t"
"call " QUOTE(__MINGW_USYMBOL(memcpy)) "\n\t"
"addq $24, %%rsp\n\t"
// call fwscanf
"movq 0x18(%%rsp), %%r9\n\t"
"movq 0x10(%%rsp), %%r8\n\t"
"movq 0x8(%%rsp), %%rdx\n\t"
"movq (%%rsp), %%rcx\n\t"
"call " QUOTE(__MINGW_USYMBOL(fwscanf)) "\n\t"
// restore stack
"movq %%rbx, %%rsp\n\t"
: "=a"(ret), "=c"(stream), "=d"(format)
: "1"(stream), "2"(format), "S"(arg),
"a"(&ret)
: "rbx", "rdi");
#elif defined(_X86_) || defined(__i386__)
__asm__ __volatile__ (
// allocate stack (esp += frame - arg3 - (8[arg1,2] + 12))
"movl %%esp, %%ebx\n\t"
"lea 0xFFFFFFEC(%%esp, %6), %%esp\n\t"
"subl %5, %%esp\n\t"
// set up stack
"movl %1, 0xC(%%esp)\n\t" // stream
"movl %2, 0x10(%%esp)\n\t" // format
"lea 0x14(%%esp), %%edi\n\t"
"movl %%edi, (%%esp)\n\t" // memcpy dest
"movl %5, 0x4(%%esp)\n\t" // memcpy src
"movl %5, 0x8(%%esp)\n\t"
"subl %6, 0x8(%%esp)\n\t" // memcpy len
"call " QUOTE(__MINGW_USYMBOL(memcpy)) "\n\t"
"addl $12, %%esp\n\t"
// call fscanf
"call " QUOTE(__MINGW_USYMBOL(fwscanf)) "\n\t"
// restore stack
"movl %%ebx, %%esp\n\t"
: "=a"(ret), "=c"(stream), "=d"(format)
: "1"(stream), "2"(format), "S"(arg),
"a"(&ret)
: "ebx", "edi");
#elif defined(_ARM_) || defined(__arm__)
ret = __ms_vfwscanf_internal(stream, format, arg);
#endif
return ret;
}