Annotation of src/usr.bin/make/lowparse.h, Revision 1.11
1.4 espie 1: #ifndef LOWPARSE_H
2: #define LOWPARSE_H
3:
1.11 ! espie 4: /* $OpenBSD: lowparse.h,v 1.10 2012/09/21 07:55:20 espie Exp $ */
1.1 espie 5:
6: /*
7: * Copyright (c) 1999 Marc Espie.
8: *
9: * Extensive code changes for the OpenBSD project.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
21: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
24: * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31: */
1.4 espie 32: /* low-level parsing module:
33: * select input stream to parse, and do high-speed processing of
34: * lines: skipping comments, handling continuation lines, or skipping
35: * over dead conditionals.
36: *
37: * Basic template:
38: *
39: * Parse_Fromxxx(source);
40: * do {
41: * while ((line = Parse_ReadNormalLine(&buf)) != NULL) {
1.5 espie 42: * handle line, use Parse_Fromxxx to push includes,
1.4 espie 43: * Parse_ReadNextConditional to get over non-conditional lines.
44: * or Parse_ReadUnparsedLine to handle special cases manually.
45: * }
46: * } while (Parse_NextFile());
47: */
48:
49: /* Selection of input stream */
50: /* Parse_FromFile(filename, filehandle);
51: * Push given filehandle on the input stack, using filename for diagnostic
52: * messages. The module assumes ownership of the filehandle and of
53: * the filename: provide copies if necessary. */
54: extern void Parse_FromFile(const char *, FILE *);
55: /* Parse_FromString(str, lineno);
56: * Push expanded string str on the input stack, assuming it starts at
57: * lineno in the current file. This is used to reparse .for loops
58: * after the variable has been expanded, hence no need to respecify
59: * the filename. The module assumes ownership of the string: provide a
60: * copy if necessary. */
61: extern void Parse_FromString(char *, unsigned long);
62:
63: /* Error reporting, and tagging of read structures. */
64: /* lineno = Parse_Getlineno();
65: * Returns the current lineno. */
66: extern unsigned long Parse_Getlineno(void);
67: /* name = Parse_Getfilename();
68: * Returns the current filename. Safe to keep without copying. */
69: extern const char *Parse_Getfilename(void);
1.8 espie 70:
71: /* Parse_FillLocation(origin)
72: * Fill the location pointed by origin with the current location. */
73: extern void Parse_FillLocation(Location *);
1.9 espie 74:
75: /* Parse_SetLocation(origin)
76: * Set the "parse location" to a given origin.
77: * Used for parse errors that occur during variable expansion at
78: * runtime.
79: */
80: extern void Parse_SetLocation(Location *);
1.4 espie 81:
82: /* continue = Parse_NextFile();
83: * Advance parsing to the next file in the input stack. Returns true
84: * if there is parsing left to do.
85: */
86: extern bool Parse_NextFile(void);
87:
88:
89: /* line = Parse_ReadNormalLine(buf);
90: * Reads next line into buffer and return its contents. Handles line
91: * continuation, remove extra blanks, and skip trivial comments. tabs at
92: * beginning of line are left alone, to be able to recognize target
93: * lines. */
94: extern char *Parse_ReadNormalLine(Buffer);
95:
96: /* line = ParseReadNextConditionalLine(buf);
97: * Returns next conditional line, skipping over everything else. */
98: extern char *Parse_ReadNextConditionalLine(Buffer);
99: /* line = ParseReadUnparsedLine(buf, type);
100: * Reads line without parsing anything beyond continuations.
101: * Handle special cases such as conditional lines, or lines that
102: * need a reparse (loops). */
103: extern char *Parse_ReadUnparsedLine(Buffer, const char *);
104: /* Parse_ReportErrors();
105: * At end of parsing, report on fatal errors.
106: */
107: extern void Parse_ReportErrors(void);
1.10 espie 108:
109: extern void Parse_setcurdir(const char *);
1.1 espie 110: #endif