58 __submore(FILE *fp)  in __submore()  argument
63 	if (fp->_ub._base == fp->_ubuf) {  in __submore()
69 		fp->_ub._base = p;  in __submore()
70 		fp->_ub._size = BUFSIZ;  in __submore()
71 		p += BUFSIZ - sizeof(fp->_ubuf);  in __submore()
72 		for (i = sizeof(fp->_ubuf); --i >= 0;)  in __submore()
73 			p[i] = fp->_ubuf[i];  in __submore()
74 		fp->_p = p;  in __submore()
77 	i = fp->_ub._size;  in __submore()
78 	p = reallocarray(fp->_ub._base, i, 2);  in __submore()
83 	fp->_p = p + i;  in __submore()
84 	fp->_ub._base = p;  in __submore()
85 	fp->_ub._size = i * 2;  in __submore()
93 ungetc(int c, FILE *fp)  in ungetc()  argument
99 	FLOCKFILE_CANCELSAFE(fp);  in ungetc()
100 	ORIENT(fp, -1);  in ungetc()
101 	ret = __ungetc(c, fp);  in ungetc()
110 __ungetc(int c, FILE *fp)  in __ungetc()  argument
115 	if ((fp->_flags & __SRD) == 0) {  in __ungetc()
120 		if ((fp->_flags & __SRW) == 0)  in __ungetc()
122 		if (fp->_flags & __SWR) {  in __ungetc()
123 			if (__sflush(fp))  in __ungetc()
125 			fp->_flags &= ~__SWR;  in __ungetc()
126 			fp->_w = 0;  in __ungetc()
127 			fp->_lbfsize = 0;  in __ungetc()
129 		fp->_flags |= __SRD;  in __ungetc()
137 	if (HASUB(fp)) {  in __ungetc()
138 		if (fp->_r >= fp->_ub._size && __submore(fp))  in __ungetc()
140 		*--fp->_p = c;  in __ungetc()
141 		fp->_r++;  in __ungetc()
144 	fp->_flags &= ~__SEOF;  in __ungetc()
151 	if (fp->_bf._base != NULL && fp->_p > fp->_bf._base &&  in __ungetc()
152 	    fp->_p[-1] == c) {  in __ungetc()
153 		fp->_p--;  in __ungetc()
154 		fp->_r++;  in __ungetc()
162 	fp->_ur = fp->_r;  in __ungetc()
163 	fp->_up = fp->_p;  in __ungetc()
164 	fp->_ub._base = fp->_ubuf;  in __ungetc()
165 	fp->_ub._size = sizeof(fp->_ubuf);  in __ungetc()
166 	fp->_ubuf[sizeof(fp->_ubuf) - 1] = c;  in __ungetc()
167 	fp->_p = &fp->_ubuf[sizeof(fp->_ubuf) - 1];  in __ungetc()
168 	fp->_r = 1;  in __ungetc()