588 lines
13 KiB
C
588 lines
13 KiB
C
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/* $NetBSD: emit1.c,v 1.4 1995/10/02 17:21:28 jpo Exp $ */
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/*
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* Copyright (c) 1994, 1995 Jochen Pohl
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* All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Jochen Pohl for
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* The NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef lint
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static char rcsid[] = "$NetBSD: emit1.c,v 1.4 1995/10/02 17:21:28 jpo Exp $";
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#endif
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#include <ctype.h>
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#include "lint1.h"
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static void outtt __P((sym_t *, sym_t *));
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static void outfstrg __P((strg_t *));
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/*
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* Write type into the output buffer.
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* The type is written as a sequence of substrings, each of which describes a
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* node of type type_t
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* a node is coded as follows:
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* char C
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* signed char s C
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* unsigned char u C
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* short S
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* unsigned short u S
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* int I
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* unsigned int u I
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* long L
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* unsigned long u L
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* long long Q
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* unsigned long long u Q
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* float s D
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* double D
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* long double l D
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* void V
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* * P
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* [n] A n
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* () F
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* (void) F 0
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* (n arguments) F n arg1 arg2 ... argn
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* (n arguments, ...) F n arg1 arg2 ... argn-1 E
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* (a, b, c, ...) f n arg1 arg2 ...
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* enum tag e T tag_or_typename
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* struct tag s T tag_or_typename
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* union tag u T tag_or_typename
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*
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* tag_or_typename 0 no tag or type name
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* 1 n tag Tag
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* 2 n typename only type name
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*
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* spaces are only for better readability
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* additionaly it is possible to prepend the characters 'c' (for const)
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* and 'v' (for volatile)
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*/
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void
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outtype(tp)
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type_t *tp;
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{
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int t, s, na;
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sym_t *arg;
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tspec_t ts;
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while (tp != NULL) {
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if ((ts = tp->t_tspec) == INT && tp->t_isenum)
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ts = ENUM;
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switch (ts) {
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case CHAR: t = 'C'; s = '\0'; break;
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case SCHAR: t = 'C'; s = 's'; break;
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case UCHAR: t = 'C'; s = 'u'; break;
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case SHORT: t = 'S'; s = '\0'; break;
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case USHORT: t = 'S'; s = 'u'; break;
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case INT: t = 'I'; s = '\0'; break;
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case UINT: t = 'I'; s = 'u'; break;
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case LONG: t = 'L'; s = '\0'; break;
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case ULONG: t = 'L'; s = 'u'; break;
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case QUAD: t = 'Q'; s = '\0'; break;
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case UQUAD: t = 'Q'; s = 'u'; break;
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case FLOAT: t = 'D'; s = 's'; break;
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case DOUBLE: t = 'D'; s = '\0'; break;
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case LDOUBLE: t = 'D'; s = 'l'; break;
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case VOID: t = 'V'; s = '\0'; break;
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case PTR: t = 'P'; s = '\0'; break;
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case ARRAY: t = 'A'; s = '\0'; break;
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case FUNC: t = 'F'; s = '\0'; break;
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case ENUM: t = 'T'; s = 'e'; break;
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case STRUCT: t = 'T'; s = 's'; break;
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case UNION: t = 'T'; s = 'u'; break;
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default:
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lerror("outtyp() 1");
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}
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if (tp->t_const)
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outchar('c');
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if (tp->t_volatile)
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outchar('v');
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if (s != '\0')
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outchar(s);
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outchar(t);
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if (ts == ARRAY) {
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outint(tp->t_dim);
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} else if (ts == ENUM) {
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outtt(tp->t_enum->etag, tp->t_enum->etdef);
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} else if (ts == STRUCT || ts == UNION) {
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outtt(tp->t_str->stag, tp->t_str->stdef);
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} else if (ts == FUNC && tp->t_proto) {
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na = 0;
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for (arg = tp->t_args; arg != NULL; arg = arg->s_nxt)
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na++;
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if (tp->t_vararg)
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na++;
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outint(na);
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for (arg = tp->t_args; arg != NULL; arg = arg->s_nxt)
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outtype(arg->s_type);
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if (tp->t_vararg)
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outchar('E');
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}
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tp = tp->t_subt;
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}
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}
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/*
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* type to string
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* used for debugging output
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*
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* it uses its own output buffer for conversion
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*/
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const char *
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ttos(tp)
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type_t *tp;
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{
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static ob_t tob;
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ob_t tmp;
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if (tob.o_buf == NULL) {
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tob.o_len = 64;
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tob.o_buf = tob.o_nxt = xmalloc(tob.o_len);
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tob.o_end = tob.o_buf + tob.o_len;
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}
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tmp = ob;
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ob = tob;
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ob.o_nxt = ob.o_buf;
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outtype(tp);
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outchar('\0');
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tob = ob;
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ob = tmp;
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return (tob.o_buf);
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}
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/*
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* write the name of a tag or typename
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*
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* if the tag is named, the name of the
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* tag is written, otherwise, if a typename exists which
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* refers to this tag, this typename is written
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*/
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static void
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outtt(tag, tdef)
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sym_t *tag, *tdef;
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{
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if (tag->s_name != unnamed) {
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outint(1);
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outname(tag->s_name);
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} else if (tdef != NULL) {
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outint(2);
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outname(tdef->s_name);
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} else {
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outint(0);
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}
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}
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/*
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* write information about an global declared/defined symbol
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* with storage class extern
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*
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* informations about function definitions are written in outfdef(),
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* not here
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*/
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void
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outsym(sym, sc, def)
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sym_t *sym;
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scl_t sc;
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def_t def;
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{
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/*
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* Static function declarations must also be written to the output
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* file. Compatibility of function declarations (for both static
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* and extern functions) must be checked in lint2. Lint1 can't do
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* this, especially not, if functions are declared at block level
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* before their first declaration at level 0.
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*/
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if (sc != EXTERN && !(sc == STATIC && sym->s_type->t_tspec == FUNC))
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return;
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/* reset buffer */
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outclr();
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/*
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* line number of .c source, 'd' for declaration, Id of current
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* source (.c or .h), and line in current source.
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*/
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outint(csrc_pos.p_line);
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outchar('d');
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outint(getfnid(sym->s_dpos.p_file));
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outchar('.');
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outint(sym->s_dpos.p_line);
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/* flags */
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switch (def) {
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case DEF:
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/* defined */
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outchar('d');
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break;
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case TDEF:
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/* tentative defined */
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outchar('t');
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break;
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case DECL:
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/* declared */
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outchar('e');
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break;
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default:
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lerror("outsym() 2");
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}
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if (llibflg && def != DECL) {
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/*
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* mark it as used so we get no warnings from lint2 about
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* unused symbols in libraries.
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*/
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outchar('u');
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}
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if (sc == STATIC)
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outchar('s');
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/* name of the symbol */
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outname(sym->s_name);
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/* type of the symbol */
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outtype(sym->s_type);
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}
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/*
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* write information about function definition
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*
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* this is also done for static functions so we are able to check if
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* they are called with proper argument types
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*/
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void
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outfdef(fsym, posp, rval, osdef, args)
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sym_t *fsym, *args;
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pos_t *posp;
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int rval, osdef;
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{
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int narg;
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sym_t *arg;
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/* reset the buffer */
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outclr();
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/*
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* line number of .c source, 'd' for declaration, Id of current
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* source (.c or .h), and line in current source
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*
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* we are already at the end of the function. If we are in the
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* .c source, posp->p_line is correct, otherwise csrc_pos.p_line
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* (for functions defined in header files).
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*/
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if (posp->p_file == csrc_pos.p_file) {
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outint(posp->p_line);
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} else {
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outint(csrc_pos.p_line);
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}
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outchar('d');
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outint(getfnid(posp->p_file));
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outchar('.');
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outint(posp->p_line);
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/* flags */
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/* both SCANFLIKE and PRINTFLIKE imply VARARGS */
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if (prflstrg != -1) {
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nvararg = prflstrg;
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} else if (scflstrg != -1) {
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nvararg = scflstrg;
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}
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if (nvararg != -1) {
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outchar('v');
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outint(nvararg);
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}
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if (scflstrg != -1) {
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outchar('S');
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outint(scflstrg);
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}
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if (prflstrg != -1) {
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outchar('P');
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outint(prflstrg);
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}
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nvararg = prflstrg = scflstrg = -1;
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outchar('d');
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if (rval)
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/* has return value */
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outchar('r');
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if (llibflg)
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/*
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* mark it as used so lint2 does not complain about
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* unused symbols in libraries
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*/
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outchar('u');
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if (osdef)
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/* old style function definition */
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outchar('o');
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if (fsym->s_scl == STATIC)
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outchar('s');
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/* name of function */
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outname(fsym->s_name);
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/* argument types and return value */
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if (osdef) {
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narg = 0;
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for (arg = args; arg != NULL; arg = arg->s_nxt)
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narg++;
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outchar('f');
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outint(narg);
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for (arg = args; arg != NULL; arg = arg->s_nxt)
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outtype(arg->s_type);
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outtype(fsym->s_type->t_subt);
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} else {
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outtype(fsym->s_type);
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}
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}
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/*
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* write out all information necessary for lint2 to check function
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* calls
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*
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* rvused is set if the return value is used (asigned to a variable)
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* rvdisc is set if the return value is not used and not ignored
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* (casted to void)
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*/
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void
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outcall(tn, rvused, rvdisc)
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tnode_t *tn;
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int rvused, rvdisc;
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{
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tnode_t *args, *arg;
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int narg, n, i;
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|
quad_t q;
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||
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tspec_t t;
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|
/* reset buffer */
|
||
|
|
outclr();
|
||
|
|
|
||
|
|
/*
|
||
|
|
* line number of .c source, 'c' for function call, Id of current
|
||
|
|
* source (.c or .h), and line in current source
|
||
|
|
*/
|
||
|
|
outint(csrc_pos.p_line);
|
||
|
|
outchar('c');
|
||
|
|
outint(getfnid(curr_pos.p_file));
|
||
|
|
outchar('.');
|
||
|
|
outint(curr_pos.p_line);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* flags; 'u' and 'i' must be last to make sure a letter
|
||
|
|
* is between the numeric argument of a flag and the name of
|
||
|
|
* the function
|
||
|
|
*/
|
||
|
|
narg = 0;
|
||
|
|
args = tn->tn_right;
|
||
|
|
for (arg = args; arg != NULL; arg = arg->tn_right)
|
||
|
|
narg++;
|
||
|
|
/* informations about arguments */
|
||
|
|
for (n = 1; n <= narg; n++) {
|
||
|
|
/* the last argument is the top one in the tree */
|
||
|
|
for (i = narg, arg = args; i > n; i--, arg = arg->tn_right) ;
|
||
|
|
arg = arg->tn_left;
|
||
|
|
if (arg->tn_op == CON) {
|
||
|
|
if (isityp(t = arg->tn_type->t_tspec)) {
|
||
|
|
/*
|
||
|
|
* XXX it would probably be better to
|
||
|
|
* explizitly test the sign
|
||
|
|
*/
|
||
|
|
if ((q = arg->tn_val->v_quad) == 0) {
|
||
|
|
/* zero constant */
|
||
|
|
outchar('z');
|
||
|
|
} else if (msb(q, t, 0) == 0) {
|
||
|
|
/* positive if casted to signed */
|
||
|
|
outchar('p');
|
||
|
|
} else {
|
||
|
|
/* negative if casted to signed */
|
||
|
|
outchar('n');
|
||
|
|
}
|
||
|
|
outint(n);
|
||
|
|
}
|
||
|
|
} else if (arg->tn_op == AMPER &&
|
||
|
|
arg->tn_left->tn_op == STRING &&
|
||
|
|
arg->tn_left->tn_strg->st_tspec == CHAR) {
|
||
|
|
/* constant string, write all format specifiers */
|
||
|
|
outchar('s');
|
||
|
|
outint(n);
|
||
|
|
outfstrg(arg->tn_left->tn_strg);
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
/* return value discarded/used/ignored */
|
||
|
|
outchar(rvdisc ? 'd' : (rvused ? 'u' : 'i'));
|
||
|
|
|
||
|
|
/* name of the called function */
|
||
|
|
outname(tn->tn_left->tn_left->tn_sym->s_name);
|
||
|
|
|
||
|
|
/* types of arguments */
|
||
|
|
outchar('f');
|
||
|
|
outint(narg);
|
||
|
|
for (n = 1; n <= narg; n++) {
|
||
|
|
/* the last argument is the top one in the tree */
|
||
|
|
for (i = narg, arg = args; i > n; i--, arg = arg->tn_right) ;
|
||
|
|
outtype(arg->tn_left->tn_type);
|
||
|
|
}
|
||
|
|
/* expected type of return value */
|
||
|
|
outtype(tn->tn_type);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* extracts potential format specifiers for printf() and scanf() and
|
||
|
|
* writes them, enclosed in "" and qouted if necessary, to the output buffer
|
||
|
|
*/
|
||
|
|
static void
|
||
|
|
outfstrg(strg)
|
||
|
|
strg_t *strg;
|
||
|
|
{
|
||
|
|
int c, oc, first;
|
||
|
|
u_char *cp;
|
||
|
|
|
||
|
|
if (strg->st_tspec != CHAR)
|
||
|
|
lerror("outfstrg() 1");
|
||
|
|
|
||
|
|
cp = strg->st_cp;
|
||
|
|
|
||
|
|
outchar('"');
|
||
|
|
|
||
|
|
c = *cp++;
|
||
|
|
|
||
|
|
while (c != '\0') {
|
||
|
|
|
||
|
|
if (c != '%') {
|
||
|
|
c = *cp++;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
outqchar('%');
|
||
|
|
c = *cp++;
|
||
|
|
|
||
|
|
/* flags for printf and scanf and *-fieldwidth for printf */
|
||
|
|
while (c != '\0' && (c == '-' || c == '+' || c == ' ' ||
|
||
|
|
c == '#' || c == '0' || c == '*')) {
|
||
|
|
outqchar(c);
|
||
|
|
c = *cp++;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* numeric field width */
|
||
|
|
while (c != '\0' && isdigit(c)) {
|
||
|
|
outqchar(c);
|
||
|
|
c = *cp++;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* precision for printf */
|
||
|
|
if (c == '.') {
|
||
|
|
outqchar(c);
|
||
|
|
if ((c = *cp++) == '*') {
|
||
|
|
outqchar(c);
|
||
|
|
c = *cp++;
|
||
|
|
} else {
|
||
|
|
while (c != '\0' && isdigit(c)) {
|
||
|
|
outqchar(c);
|
||
|
|
c = *cp++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* h, l, L and q flags fpr printf and scanf */
|
||
|
|
if (c == 'h' || c == 'l' || c == 'L' || c == 'q') {
|
||
|
|
outqchar(c);
|
||
|
|
c = *cp++;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The last character. It is always written so we can detect
|
||
|
|
* invalid format specifiers.
|
||
|
|
*/
|
||
|
|
if (c != '\0') {
|
||
|
|
outqchar(c);
|
||
|
|
oc = c;
|
||
|
|
c = *cp++;
|
||
|
|
/*
|
||
|
|
* handle [ for scanf. [-] means that a minus sign
|
||
|
|
* was found at an undefined position.
|
||
|
|
*/
|
||
|
|
if (oc == '[') {
|
||
|
|
if (c == '^')
|
||
|
|
c = *cp++;
|
||
|
|
if (c == ']')
|
||
|
|
c = *cp++;
|
||
|
|
first = 1;
|
||
|
|
while (c != '\0' && c != ']') {
|
||
|
|
if (c == '-') {
|
||
|
|
if (!first && *cp != ']')
|
||
|
|
outqchar(c);
|
||
|
|
}
|
||
|
|
first = 0;
|
||
|
|
c = *cp++;
|
||
|
|
}
|
||
|
|
if (c == ']') {
|
||
|
|
outqchar(c);
|
||
|
|
c = *cp++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
outchar('"');
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* writes a record if sym was used
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
outusg(sym)
|
||
|
|
sym_t *sym;
|
||
|
|
{
|
||
|
|
/* reset buffer */
|
||
|
|
outclr();
|
||
|
|
|
||
|
|
/*
|
||
|
|
* line number of .c source, 'u' for used, Id of current
|
||
|
|
* source (.c or .h), and line in current source
|
||
|
|
*/
|
||
|
|
outint(csrc_pos.p_line);
|
||
|
|
outchar('u');
|
||
|
|
outint(getfnid(curr_pos.p_file));
|
||
|
|
outchar('.');
|
||
|
|
outint(curr_pos.p_line);
|
||
|
|
|
||
|
|
/* necessary to delimit both numbers */
|
||
|
|
outchar('x');
|
||
|
|
|
||
|
|
/* Den Namen des Symbols ausgeben */
|
||
|
|
outname(sym->s_name);
|
||
|
|
}
|