Commit | Line | Data |
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048e6e55 LM |
1 | /* depend: */ |
2 | /* cflags: */ | |
3 | /* linker: debug.o */ | |
4 | ||
5 | #include <assert.h> | |
6 | #include <getopt.h> | |
7 | #include <malloc.h> | |
8 | #include <stdio.h> | |
9 | #include <stdlib.h> | |
10 | #include <string.h> | |
11 | ||
12 | #include "debug.h" | |
13 | ||
14 | /* macros */ | |
15 | ||
16 | #define BUFSIZE 256 | |
e07f5d2a | 17 | #define MEMSIZE 8 |
048e6e55 LM |
18 | |
19 | /* type definition */ | |
20 | ||
21 | /* gobal variables */ | |
22 | ||
23 | char *progname = NULL; | |
24 | int p = 0; | |
25 | char mem[MEMSIZE] = {0}; | |
26 | ||
27 | /* help function */ | |
28 | ||
29 | int usage (int ret) | |
30 | { | |
31 | FILE *fd = ret ? stderr : stdout; | |
e07f5d2a | 32 | fprintf (fd, "usage: %s [-i file] [-h] [-m memory] [-o file] [-v]\n", progname); |
048e6e55 LM |
33 | fprintf (fd, " -i : input file\n"); |
34 | fprintf (fd, " -h : help message\n"); | |
e07f5d2a | 35 | fprintf (fd, " -m : memory [0..0]\n"); |
048e6e55 LM |
36 | fprintf (fd, " -o : output file\n"); |
37 | fprintf (fd, " -v : verbose level (%d)\n", verbose); | |
38 | ||
39 | return ret; | |
40 | } | |
41 | ||
07cc2c73 LM |
42 | /* main process */ |
43 | ||
44 | int process (char *buffer, int nb, FILE *out) { | |
45 | int i; | |
46 | ||
47 | for (i = 0; (i < nb) && (buffer[i] != 0); i++) { | |
48 | ||
49 | VERBOSE (DEBUG, fprintf (stderr, "%s: read '%c' (%u)\n", progname, buffer[i], buffer[i])); | |
50 | switch (buffer[i]) { | |
51 | case '>': /* increase pointer */ | |
52 | p++; | |
53 | break; | |
54 | case '<': /* decrease pointer */ | |
55 | p--; | |
56 | break; | |
57 | case '+': /* increase pointer value */ | |
58 | if ((p >= 0) && (p < MEMSIZE)) { | |
59 | mem[p]++; | |
60 | } else { | |
61 | VERBOSE (ERROR, fprintf (stderr, "%s: invalid address (%d)\n", progname, p)); | |
62 | return 1; | |
63 | } | |
64 | break; | |
65 | case '-': /* decrease pointer value */ | |
66 | if ((p >= 0) && (p < MEMSIZE)) { | |
67 | mem[p]--; | |
68 | } else { | |
69 | VERBOSE (ERROR, fprintf (stderr, "%s: invalid address (%d)\n", progname, p)); | |
70 | return 1; | |
71 | } | |
72 | break; | |
73 | case '.': /* output pointer value */ | |
74 | if ((p >= 0) && (p < MEMSIZE)) { | |
75 | fprintf (out, "%c", mem[p]); | |
76 | } else { | |
77 | VERBOSE (ERROR, fprintf (stderr, "%s: invalid address (%d)\n", progname, p)); | |
78 | return 1; | |
79 | } | |
80 | break; | |
81 | case ',': /* read a byte and store it in memory */ | |
82 | if ((p >= 0) && (p < MEMSIZE)) { | |
096fb1e3 LM |
83 | int c = getchar (); |
84 | mem[p] = (c > 0) ? c : 0; | |
07cc2c73 LM |
85 | } else { |
86 | VERBOSE (ERROR, fprintf (stderr, "%s: invalid address (%d)\n", progname, p)); | |
87 | return 1; | |
88 | } | |
89 | break; | |
90 | case '[': /* jump to right bracket if pointer is set to 0 */ | |
91 | if (mem[p] == 0) { | |
92 | int bracket = 1; | |
93 | while ((++i < nb) && (bracket > 0)) { | |
94 | bracket += (buffer[i] == '[') ? +1 : (buffer[i] == ']') ? -1 :0; | |
95 | } | |
96 | if (bracket) { | |
97 | VERBOSE (ERROR, fprintf (stderr, "%s: brace not closed\n", progname)); | |
98 | return 1; | |
99 | } | |
100 | } else { | |
101 | return process (buffer + i + 1, nb - i - 1, out); | |
102 | } | |
103 | break; | |
104 | case ']': /* jump to left bracket if pointer is different to 0 */ | |
105 | if (mem[p] != 0) { | |
106 | i = -1; | |
107 | } | |
108 | break; | |
096fb1e3 LM |
109 | case ' ': |
110 | case '\t': | |
07cc2c73 LM |
111 | case '\n': |
112 | case '\r': | |
113 | break; | |
114 | default: | |
115 | VERBOSE (WARNING, fprintf (stderr, "%s: can't understand '%c'\n", progname, buffer[i])); | |
116 | } | |
117 | ||
118 | //VERBOSE (DEBUG, int _i; fprintf (stderr, "%s: p: %d mem:", progname, p); for (_i = 0; _i < MEMSIZE; _i++) fprintf (stderr, " %d", mem[_i]); fprintf (stderr, "\n")); | |
119 | ||
120 | } | |
121 | ||
122 | return 0; | |
123 | } | |
124 | ||
048e6e55 LM |
125 | /* main function */ |
126 | ||
127 | int main (int argc, char *argv[]) | |
128 | { | |
129 | char *input = NULL; | |
130 | char *output = NULL; | |
131 | char *buffer = NULL; | |
e07f5d2a | 132 | int i; |
048e6e55 LM |
133 | int n = 0; |
134 | int size = 0; | |
135 | FILE *fid = NULL; | |
136 | ||
137 | /* get basename */ | |
138 | char *pt = progname = argv[0]; | |
139 | while (*pt) { | |
140 | if ((*pt == '/') || (*pt == '\\')) { | |
141 | progname = pt + 1; | |
142 | } | |
143 | pt++; | |
144 | } | |
145 | ||
146 | int c; | |
096fb1e3 | 147 | while ((c = getopt(argc, argv, "e:i:m:o:hv:")) != EOF) { |
048e6e55 | 148 | switch (c) { |
096fb1e3 LM |
149 | case 'e': |
150 | if (buffer) { | |
151 | free (buffer); | |
152 | } | |
153 | buffer = strdup (optarg); | |
154 | if (buffer == NULL) { | |
155 | VERBOSE (ERROR, fprintf (stderr, "%s: can't allocate memory\n", progname)); | |
156 | return 1; | |
157 | } | |
158 | size = strlen (buffer) + 1; | |
159 | break; | |
048e6e55 LM |
160 | case 'i': |
161 | input = optarg; | |
162 | break; | |
e07f5d2a LM |
163 | case 'm': |
164 | for (i = 0; i < MEMSIZE; i++) { | |
165 | if (optarg) { | |
166 | mem[i] = strtol (optarg, &optarg, 10); | |
167 | VERBOSE (DEBUG, fprintf (stderr, "%s: mem[%d] = %d\n", progname, i, mem[i])); | |
168 | } | |
169 | } | |
170 | if (*optarg != 0) { | |
171 | VERBOSE (WARNING, fprintf (stderr, "%s: too many memory values\n", progname)); | |
172 | return 1; | |
173 | } | |
174 | break; | |
048e6e55 LM |
175 | case 'o': |
176 | output = optarg; | |
177 | break; | |
178 | case 'v': | |
179 | verbose = atoi (optarg); | |
180 | break; | |
181 | case 'h': | |
182 | default: | |
183 | return usage (c != 'h'); | |
184 | } | |
185 | } | |
186 | if (argc - optind != 0) { | |
187 | VERBOSE (ERROR, fprintf (stderr, "%s: invalid option -- %s\n", progname, argv[optind])); | |
188 | return usage (1); | |
189 | } | |
190 | ||
191 | /* check input file */ | |
192 | if (input) { | |
193 | fid = fopen (input, "r"); | |
194 | if (fid == NULL) { | |
195 | VERBOSE (ERROR, fprintf (stderr, "%s: can't open file '%s' for reading\n", progname, input)); | |
196 | return 1; | |
197 | } | |
096fb1e3 | 198 | } else if (buffer == NULL) { |
048e6e55 LM |
199 | fid = stdin; |
200 | } | |
201 | ||
202 | /* read input file */ | |
096fb1e3 LM |
203 | if (fid) { |
204 | while (!feof (fid)) { | |
205 | buffer = (char *) realloc (buffer, size + BUFSIZE); | |
206 | if (buffer == NULL) { | |
207 | VERBOSE (ERROR, fprintf (stderr, "%s: can't allocate memory\n", progname)); | |
208 | return 1; | |
209 | } | |
210 | memset (buffer + size, 0, BUFSIZE); | |
211 | n = fread (buffer + size, 1, BUFSIZE, fid); | |
212 | if (errno != 0) { | |
213 | VERBOSE (ERROR, fprintf (stderr, "%s: can't read data from file '%s'\n", progname, input)); | |
214 | return 1; | |
215 | } | |
216 | size += BUFSIZE; | |
048e6e55 | 217 | } |
048e6e55 | 218 | |
096fb1e3 LM |
219 | /* close input file */ |
220 | fclose (fid); | |
221 | VERBOSE (DEBUG, fprintf (stderr, "%s: read %d bytes\n", progname, size + n - BUFSIZE)); | |
222 | } else { | |
223 | VERBOSE (DEBUG, fprintf (stderr, "%s: prog %d bytes\n", progname, size -1)); | |
224 | } | |
048e6e55 LM |
225 | |
226 | /* check output file */ | |
227 | if (output) { | |
228 | fid = fopen (output, "w"); | |
229 | if (fid == NULL) { | |
230 | VERBOSE (ERROR, fprintf (stderr, "%s: can't open file '%s' for writing\n", progname, output)); | |
231 | return 1; | |
232 | } | |
233 | } else { | |
234 | fid = stdout; | |
235 | } | |
236 | ||
237 | /* main process */ | |
238 | int rc = process (buffer, size, fid); | |
e07f5d2a | 239 | VERBOSE (INFO, fprintf (stdout, "\nmemory:"); int _i; for (_i = 0; _i < MEMSIZE; _i++) fprintf (stdout," %d", mem[_i]); fprintf (stdout,"\n")); |
048e6e55 LM |
240 | |
241 | /* close output file */ | |
242 | fclose (fid); | |
243 | ||
244 | return rc; | |
245 | } | |
246 | ||
048e6e55 LM |
247 | // test: bf.exe -h |
248 | // test: bf.exe -h | awk '/usage:/ { rc=1 } END { exit (1-rc) }' | |
249 | // test: bf.exe -_ 2> /dev/null | awk 'END { if (NR == 0) { exit(0) } else exit (1) }' | |
250 | // test: bf.exe -_ 2>&1 | awk '/usage:/ { rc=1 } END { exit (1-rc) }' | |
096fb1e3 LM |
251 | // test: bf.exe -i error.b 2>&1 | grep "can't open" | grep -q "reading" |
252 | // test: echo ">>." | bf.exe -o error/error.b 2>&1 | grep "can't open" | grep -q "writing" | |
253 | // test: echo '+++>++>>-<--' | bf.exe -v2 | grep -q "memory: 3 2 -2 -1 0" | |
254 | // test: bf.exe -e '+++>++>>-<--' -v2 | grep -q "memory: 3 2 -2 -1 0" | |
e07f5d2a LM |
255 | // test: echo '++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.' | bf.exe -v1 | grep -q "Hello World!" |
256 | // test: echo '++++++++++[>+>+++>+++++++>++++++++++<<<<-]>>>++++++++++++++.>+++++++++++++++++.<<++.>+++++++++++++.>--.<<.>+++.+.--.>----.++++++.+.<++.>----.++.<<.>>+.-------.<<.>>++.<.>+++++.<<.>-.+.<.>---.>---.<-.++++++++.>----.<---.>+++++++.<---.++++++++.' | bf.exe -v1 | grep -q "Tu as decouvert un peu de brainfuck" | |
096fb1e3 LM |
257 | // test: echo -e "123\0" | bf.exe -e ',[>,]' -v2 | grep -q "memory: 49 50 51 0" |
258 | // test: echo -e "43\0" | bf.exe -e ',>++++++[<-------->-],[<+>-]<.' -v1 | grep -q 7 | |
e07f5d2a | 259 | |
096fb1e3 LM |
260 | // test: echo -e "32\0" | bf.exe -e ',>,>>++++++++++++++++[-<+++<---<--->>>]<<[<[>>+>+<<<-]>>>[<<<+>>>-]<<-]>.' -v1 | grep -q 6 |
261 | // test: echo -e "32\0" | bf.exe -e ',>,[->>+<<]+<[->>>[>>>>>+<<<<<->+<<]<[>]>>>>>[-<<->>>>>>>]<[>]<<<<<<]>[>>>>->]<<<<<<[-]>[-]>>[-]>.' -v1 | grep -q 3 | |
048e6e55 LM |
262 | |
263 | /* vim: set ts=4 sw=4 et: */ |