emit.c
1 //! @file emit.c
2 //! @author J. Marcel van der Veer
3 //
4 //! @section Copyright
5 //
6 // This file is part of VIF - vintage FORTRAN compiler.
7 // Copyright 2020-2025 J. Marcel van der Veer <algol68g@xs4all.nl>.
8 //
9 //! @section License
10 //
11 // This program is free software; you can redistribute it and/or modify it
12 // under the terms of the GNU General Public License as published by the
13 // Free Software Foundation; either version 3 of the License, or
14 // (at your option) any later version.
15 //
16 // This program is distributed in the hope that it will be useful, but
17 // WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
18 // or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
19 // more details. You should have received a copy of the GNU General Public
20 // License along with this program. If not, see <http://www.gnu.org/licenses/>.
21
22 //! @section Synopsis
23 //!
24 //! Emit C object code.
25
26 #include <vif.h>
27
28 //
29 // Write intermediate code
30 //
31
32 char *newpage (char *module, char *section)
33 {
34 RECORD str;
35 _srecordf (str, "\f %s %s", module, section);
36 return f_stralloc (str);
37 }
38
39 void newline (FILE * obj, char *info, int_4 phase, int_4 force)
40 {
41 if (page == 0 || (info != NULL && info[0] == '\f')) {
42 sscanf (&info[1], "%s %s", hmodule, hsection);
43 }
44 if (force || line >= LINES_PER_PAGE) {
45 RECORD str;
46 page++;
47 _srecordf (str, "// %s %16s ** %-28s ** %-48s PAGE %05d", _strupper (PACKAGE), _strupper (hdate), _strupper (hmodule), _strupper (hsection), page);
48 for (int_4 k = 0; k < (int_4) strlen (str); k++) {
49 if (str[k] == '-') {
50 str[k] = ' ';
51 }
52 }
53 if (page == 1) {
54 fprintf (obj, "%s\n\n", str);
55 line = 1;
56 } else {
57 fprintf (obj, "\f\n%s\n\n", str);
58 line = 1;
59 }
60 if (phase == JCL) {
61 fprintf (obj, "\n// Line JCL *...*....1....|....2....|....3....|....4....|....5....|....6....|....7..*.|....8\n");
62 line += 2;
63 }
64 if (phase == LIST) {
65 fprintf (obj, "\n// Line ISN *...*....1....|....2....|....3....|....4....|....5....|....6....|....7..*.|....8\n");
66 line += 2;
67 }
68 } else {
69 fprintf (obj, "\n");
70 line++;
71 }
72 }
73
74 void indentation (FILE *obj, int_4 ind) {
75 for (int_4 k = 1; k <= ind; k++) {
76 fprintf (obj, " ");
77 }
78 }
79
80 void emit_code (FILE * obj, int_4 proc)
81 {
82 // Write the procedure 'proc'.
83 int_4 nl = FALSE, printed = 0;
84 indent = 0;
85 for (int_4 phase = HEADER; phase < MAXPHA; phase++) {
86 int_4 N = 0;
87 RECORD prev;
88 prev[0] = '\0';
89 for (int_4 c_src = 0; c_src < n_c_src; c_src++) {
90 C_SRC *lin = &object[c_src];
91 if (! (lin->proc == proc && lin->phase == phase)) {
92 continue;
93 } else if (lin->text != NULL) {
94 int_4 last = strlen (lin->text) - 1;
95 if (lin->text[0] == '\f') {
96 newline (obj, lin->text, phase, TRUE);
97 prev[0] = '\0';
98 N = 0;
99 } else if (lin->text[0] == '\"' && lin->text[last] == '\"') {
100 fprintf (obj, "%s", lin->text);
101 } else if (lin->text[0] == '\'' && lin->text[last] == '\'') {
102 fprintf (obj, "%s", lin->text);
103 } else {
104 // Close block - indent less.
105 if (strchr (lin->text, '}') != NULL && strchr (lin->text, '{') == NULL) {
106 indent = _max (0, indent - INDENT);
107 }
108 // Indent, but not comments or cpp directives.
109 if (nl && strncmp (lin->text, "# ", 2) != 0 && strncmp (lin->text, "//", 2) != 0) {
110 if (strncmp (lin->text, "#define", 7) != 0) {
111 indentation (obj, indent);
112 printed += INDENT;
113 }
114 nl = FALSE;
115 }
116 // Write new line.
117 if (lin->text[last] == '\n') {
118 nl = TRUE;
119 last--;
120 }
121 if (last >= 0) {
122 // Open block - indent more.
123 if (strchr (lin->text, '{') != NULL && strchr (lin->text, '}') == NULL) {
124 indent += INDENT;
125 }
126 // Write respecting LINE_WIDTH.
127 if (strncmp (lin->text, "#", 1) == 0 || strncmp (lin->text, "//", 2) == 0) {
128 RECORD str;
129 bufcpy (str, lin->text, RECLN);
130 int_4 len = strlen (str);
131 if (len > 0 && str[len - 1] == '\n') {
132 str[len - 1] = '\0';
133 }
134 fprintf (obj, "%s", str);
135 } else if (strncmp (lin->text, "~", 1) == 0) {
136 RECORD str;
137 bufcpy (str, lin->text, RECLN);
138 int_4 len = strlen (str);
139 if (len > 0 && str[len - 1] == '\n') {
140 str[len - 1] = '\0';
141 }
142 fprintf (obj, "%s", &str[1]);
143 } else {
144 RECORD str;
145 bufcpy (str, lin->text, RECLN);
146 char *rest = NULL, *token;
147 for (token = strtok_r (str, " ", &rest); token != NULL; token = strtok_r (NULL, " ", &rest)) {
148 int_4 len = strlen (token);
149 if (N > 0) {
150 if (strchr (",;)}", token[0]) == NULL) {
151 if (strlen (prev) > 0 && strchr ("([", prev[strlen(prev) - 1]) == NULL) {
152 fprintf (obj, " ");
153 printed++;
154 }
155 }
156 }
157 if (printed + len >= LINE_WIDTH) {
158 newline (obj, lin->text, phase, FALSE);
159 indentation (obj, indent);
160 printed = INDENT;
161 prev[0] = '\0';
162 N = 0;
163 }
164 RECORD tok;
165 bufcpy (tok, token, RECLN);
166 int_4 M = strlen (tok);
167 if (M > 0 && tok[M - 1] == '\n') {
168 tok[M - 1] = '\0';
169 }
170 fprintf (obj, "%s", tok);
171 bufcpy (prev, tok /* token ? */, RECLN);
172 printed += strlen (tok);
173 N++;
174 }
175 }
176 }
177 // New line afterwards.
178 if (nl) {
179 newline (obj, lin->text, phase, FALSE);
180 printed = 0;
181 prev[0] = '\0';
182 N = 0;
183 }
184 }
185 }
186 }
187 // Final new line.
188 if (proc == 0) {
189 newline (obj, "\n", MAXPHA, FALSE);
190 }
191 }
192 if (proc > 0) {
193 newline (obj, "\n", MAXPHA, FALSE);
194 }
195 }
196
197 void write_object (char *name)
198 {
199 // Object code to file.
200 FILE *obj;
201 int_4 proc;
202 if ((obj = fopen (name, "w")) == NULL) {
203 FATAL (1101, "cannot open for writing", name);
204 exit (EXIT_FAILURE);
205 };
206 page = 0;
207 for (proc = 0; proc <= nprocs; proc++) {
208 emit_code (obj, proc);
209 }
210 fclose (obj);
211 }
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© 2002-2025 J.M. van der Veer (jmvdveer@xs4all.nl)
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