55 __submore(FILE *fp)  in __submore()  argument
60 	if (fp->_ub._base == fp->_ubuf) {  in __submore()
66 		fp->_ub._base = p;  in __submore()
67 		fp->_ub._size = BUFSIZ;  in __submore()
68 		p += BUFSIZ - sizeof(fp->_ubuf);  in __submore()
69 		for (i = sizeof(fp->_ubuf); --i >= 0;)  in __submore()
70 			p[i] = fp->_ubuf[i];  in __submore()
71 		fp->_p = p;  in __submore()
74 	i = fp->_ub._size;  in __submore()
75 	p = reallocarray(fp->_ub._base, i, 2);  in __submore()
80 	fp->_p = p + i;  in __submore()
81 	fp->_ub._base = p;  in __submore()
82 	fp->_ub._size = i * 2;  in __submore()
90 ungetc(int c, FILE *fp)  in ungetc()  argument
96 	FLOCKFILE_CANCELSAFE(fp);  in ungetc()
97 	ORIENT(fp, -1);  in ungetc()
98 	ret = __ungetc(c, fp);  in ungetc()
107 __ungetc(int c, FILE *fp)  in __ungetc()  argument
112 	if ((fp->_flags & __SRD) == 0) {  in __ungetc()
117 		if ((fp->_flags & __SRW) == 0)  in __ungetc()
119 		if (fp->_flags & __SWR) {  in __ungetc()
120 			if (__sflush(fp))  in __ungetc()
122 			fp->_flags &= ~__SWR;  in __ungetc()
123 			fp->_w = 0;  in __ungetc()
124 			fp->_lbfsize = 0;  in __ungetc()
126 		fp->_flags |= __SRD;  in __ungetc()
134 	if (HASUB(fp)) {  in __ungetc()
135 		if (fp->_r >= fp->_ub._size && __submore(fp))  in __ungetc()
137 		*--fp->_p = c;  in __ungetc()
138 		fp->_r++;  in __ungetc()
141 	fp->_flags &= ~__SEOF;  in __ungetc()
148 	if (fp->_bf._base != NULL && fp->_p > fp->_bf._base &&  in __ungetc()
149 	    fp->_p[-1] == c) {  in __ungetc()
150 		fp->_p--;  in __ungetc()
151 		fp->_r++;  in __ungetc()
159 	fp->_ur = fp->_r;  in __ungetc()
160 	fp->_up = fp->_p;  in __ungetc()
161 	fp->_ub._base = fp->_ubuf;  in __ungetc()
162 	fp->_ub._size = sizeof(fp->_ubuf);  in __ungetc()
163 	fp->_ubuf[sizeof(fp->_ubuf) - 1] = c;  in __ungetc()
164 	fp->_p = &fp->_ubuf[sizeof(fp->_ubuf) - 1];  in __ungetc()
165 	fp->_r = 1;  in __ungetc()