47 lines
1.0 KiB
C
47 lines
1.0 KiB
C
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#include <stdio.h>
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#include <stdarg.h>
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int virtual_getc_str(void *sp, const void *obj)
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// get next chat from string obj, save point is ptr to string char ptr
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{
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int ch;
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const char *s = (const char *)obj;
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const char**spc= (const char**)sp;
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if (!s || !spc) return EOF; // error
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if (!*spc) *spc = s; // first call, init savepoint
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if (!**spc) return EOF; // EOS
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ch = **spc; (*spc)++ ;
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return ch;
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}
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void virtual_ungetc_str(void *sp, int c, const void *obj)
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// if can, one step back savepoint in s
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{
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const char *s = (const char *)obj;
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const char**spc= (const char**)sp;
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if (s && spc && *spc > s) (*spc)--;
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}
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int vsscanf ( const char * s, const char * format, va_list arg )
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{
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return format_scan(s, format, arg, &virtual_getc_str, &virtual_ungetc_str);
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};
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int sscanf ( const char * s, const char * format, ...)
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{
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va_list arg;
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int n;
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va_start(arg, format);
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n = vsscanf(s, format, arg);
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va_end(arg);
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return n;
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}
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