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1eee94d3 GM |
1 | /* do not edit automatically generated by mc from CmdArgs. */ |
2 | /* CmdArgs.mod provides procedures to retrieve arguments from strings. | |
3 | ||
83ffe9cd | 4 | Copyright (C) 2001-2023 Free Software Foundation, Inc. |
1eee94d3 GM |
5 | Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>. |
6 | ||
7 | This file is part of GNU Modula-2. | |
8 | ||
9 | GNU Modula-2 is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3, or (at your option) | |
12 | any later version. | |
13 | ||
14 | GNU Modula-2 is distributed in the hope that it will be useful, but | |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | General Public License for more details. | |
18 | ||
19 | Under Section 7 of GPL version 3, you are granted additional | |
20 | permissions described in the GCC Runtime Library Exception, version | |
21 | 3.1, as published by the Free Software Foundation. | |
22 | ||
23 | You should have received a copy of the GNU General Public License and | |
24 | a copy of the GCC Runtime Library Exception along with this program; | |
25 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
26 | <http://www.gnu.org/licenses/>. */ | |
27 | ||
28 | #include "config.h" | |
29 | #include "system.h" | |
30 | # if !defined (PROC_D) | |
31 | # define PROC_D | |
32 | typedef void (*PROC_t) (void); | |
33 | typedef struct { PROC_t proc; } PROC; | |
34 | # endif | |
35 | ||
36 | #define _CmdArgs_H | |
37 | #define _CmdArgs_C | |
38 | ||
39 | # include "GASCII.h" | |
40 | # include "GStrLib.h" | |
41 | ||
42 | # define esc '\\' | |
43 | # define space ' ' | |
44 | # define squote '\'' | |
45 | # define dquote '"' | |
46 | # define tab ' ' | |
47 | ||
48 | /* | |
49 | GetArg - takes a command line and attempts to extract argument, n, | |
50 | from CmdLine. The resulting argument is placed into, a. | |
51 | The result of the operation is returned. | |
52 | */ | |
53 | ||
54 | extern "C" unsigned int CmdArgs_GetArg (const char *CmdLine_, unsigned int _CmdLine_high, unsigned int n, char *Argi, unsigned int _Argi_high); | |
55 | ||
56 | /* | |
57 | Narg - returns the number of arguments available from | |
58 | command line, CmdLine. | |
59 | */ | |
60 | ||
61 | extern "C" unsigned int CmdArgs_Narg (const char *CmdLine_, unsigned int _CmdLine_high); | |
62 | ||
63 | /* | |
64 | GetNextArg - Returns true if another argument may be found. | |
65 | The argument is taken from CmdLine at position Index, | |
66 | Arg is filled with the found argument. | |
67 | */ | |
68 | ||
69 | static unsigned int GetNextArg (const char *CmdLine_, unsigned int _CmdLine_high, unsigned int *CmdIndex, char *Arg, unsigned int _Arg_high); | |
70 | ||
71 | /* | |
72 | CopyUntilSpace - copies characters until a Space character is found. | |
73 | */ | |
74 | ||
75 | static void CopyUntilSpace (const char *From_, unsigned int _From_high, unsigned int *FromIndex, unsigned int FromHigh, char *To, unsigned int _To_high, unsigned int *ToIndex, unsigned int ToHigh); | |
76 | ||
77 | /* | |
78 | CopyUntil - copies characters until the UntilChar is found. | |
79 | */ | |
80 | ||
81 | static void CopyUntil (const char *From_, unsigned int _From_high, unsigned int *FromIndex, unsigned int FromHigh, char *To, unsigned int _To_high, unsigned int *ToIndex, unsigned int ToHigh, char UntilChar); | |
82 | ||
83 | /* | |
84 | CopyChar - copies a character from string From to string To and | |
85 | takes into consideration escape characters. ie \x | |
86 | Where x is any character. | |
87 | */ | |
88 | ||
89 | static void CopyChar (const char *From_, unsigned int _From_high, unsigned int *FromIndex, unsigned int FromHigh, char *To, unsigned int _To_high, unsigned int *ToIndex, unsigned int ToHigh); | |
90 | static unsigned int Escape (char ch); | |
91 | static unsigned int Space (char ch); | |
92 | static unsigned int DoubleQuote (char ch); | |
93 | static unsigned int SingleQuote (char ch); | |
94 | ||
95 | ||
96 | /* | |
97 | GetNextArg - Returns true if another argument may be found. | |
98 | The argument is taken from CmdLine at position Index, | |
99 | Arg is filled with the found argument. | |
100 | */ | |
101 | ||
102 | static unsigned int GetNextArg (const char *CmdLine_, unsigned int _CmdLine_high, unsigned int *CmdIndex, char *Arg, unsigned int _Arg_high) | |
103 | { | |
104 | unsigned int ArgIndex; | |
105 | unsigned int HighA; | |
106 | unsigned int HighC; | |
107 | char CmdLine[_CmdLine_high+1]; | |
108 | ||
109 | /* make a local copy of each unbounded array. */ | |
110 | memcpy (CmdLine, CmdLine_, _CmdLine_high+1); | |
111 | ||
112 | HighA = _Arg_high; /* Index into Arg */ | |
113 | HighC = StrLib_StrLen ((const char *) CmdLine, _CmdLine_high); | |
114 | ArgIndex = 0; | |
115 | /* Skip spaces */ | |
116 | while (((*CmdIndex) < HighC) && (Space (CmdLine[(*CmdIndex)]))) | |
117 | { | |
118 | (*CmdIndex) += 1; | |
119 | } | |
120 | if ((*CmdIndex) < HighC) | |
121 | { | |
122 | /* avoid gcc warning by using compound statement even if not strictly necessary. */ | |
123 | if (SingleQuote (CmdLine[(*CmdIndex)])) | |
124 | { | |
125 | /* Skip over the single quote */ | |
126 | (*CmdIndex) += 1; | |
127 | CopyUntil ((const char *) CmdLine, _CmdLine_high, CmdIndex, HighC, (char *) Arg, _Arg_high, &ArgIndex, HighA, squote); | |
128 | (*CmdIndex) += 1; | |
129 | } | |
130 | else if (DoubleQuote (CmdLine[(*CmdIndex)])) | |
131 | { | |
132 | /* avoid dangling else. */ | |
133 | /* Skip over the double quote */ | |
134 | (*CmdIndex) += 1; | |
135 | CopyUntil ((const char *) CmdLine, _CmdLine_high, CmdIndex, HighC, (char *) Arg, _Arg_high, &ArgIndex, HighA, dquote); | |
136 | (*CmdIndex) += 1; | |
137 | } | |
138 | else | |
139 | { | |
140 | /* avoid dangling else. */ | |
141 | CopyUntilSpace ((const char *) CmdLine, _CmdLine_high, CmdIndex, HighC, (char *) Arg, _Arg_high, &ArgIndex, HighA); | |
142 | } | |
143 | } | |
144 | /* Skip spaces */ | |
145 | while (((*CmdIndex) < HighC) && (Space (CmdLine[(*CmdIndex)]))) | |
146 | { | |
147 | (*CmdIndex) += 1; | |
148 | } | |
149 | if (ArgIndex < HighA) | |
150 | { | |
151 | Arg[ArgIndex] = ASCII_nul; | |
152 | } | |
153 | return (*CmdIndex) < HighC; | |
154 | /* static analysis guarentees a RETURN statement will be used before here. */ | |
155 | __builtin_unreachable (); | |
156 | } | |
157 | ||
158 | ||
159 | /* | |
160 | CopyUntilSpace - copies characters until a Space character is found. | |
161 | */ | |
162 | ||
163 | static void CopyUntilSpace (const char *From_, unsigned int _From_high, unsigned int *FromIndex, unsigned int FromHigh, char *To, unsigned int _To_high, unsigned int *ToIndex, unsigned int ToHigh) | |
164 | { | |
165 | char From[_From_high+1]; | |
166 | ||
167 | /* make a local copy of each unbounded array. */ | |
168 | memcpy (From, From_, _From_high+1); | |
169 | ||
170 | while ((((*FromIndex) < FromHigh) && ((*ToIndex) < ToHigh)) && (! (Space (From[(*FromIndex)])))) | |
171 | { | |
172 | CopyChar ((const char *) From, _From_high, FromIndex, FromHigh, (char *) To, _To_high, ToIndex, ToHigh); | |
173 | } | |
174 | } | |
175 | ||
176 | ||
177 | /* | |
178 | CopyUntil - copies characters until the UntilChar is found. | |
179 | */ | |
180 | ||
181 | static void CopyUntil (const char *From_, unsigned int _From_high, unsigned int *FromIndex, unsigned int FromHigh, char *To, unsigned int _To_high, unsigned int *ToIndex, unsigned int ToHigh, char UntilChar) | |
182 | { | |
183 | char From[_From_high+1]; | |
184 | ||
185 | /* make a local copy of each unbounded array. */ | |
186 | memcpy (From, From_, _From_high+1); | |
187 | ||
188 | while ((((*FromIndex) < FromHigh) && ((*ToIndex) < ToHigh)) && (From[(*FromIndex)] != UntilChar)) | |
189 | { | |
190 | CopyChar ((const char *) From, _From_high, FromIndex, FromHigh, (char *) To, _To_high, ToIndex, ToHigh); | |
191 | } | |
192 | } | |
193 | ||
194 | ||
195 | /* | |
196 | CopyChar - copies a character from string From to string To and | |
197 | takes into consideration escape characters. ie \x | |
198 | Where x is any character. | |
199 | */ | |
200 | ||
201 | static void CopyChar (const char *From_, unsigned int _From_high, unsigned int *FromIndex, unsigned int FromHigh, char *To, unsigned int _To_high, unsigned int *ToIndex, unsigned int ToHigh) | |
202 | { | |
203 | char From[_From_high+1]; | |
204 | ||
205 | /* make a local copy of each unbounded array. */ | |
206 | memcpy (From, From_, _From_high+1); | |
207 | ||
208 | if (((*FromIndex) < FromHigh) && ((*ToIndex) < ToHigh)) | |
209 | { | |
210 | if (Escape (From[(*FromIndex)])) | |
211 | { | |
212 | /* Skip over Escape Character */ | |
213 | (*FromIndex) += 1; | |
214 | } | |
215 | if ((*FromIndex) < FromHigh) | |
216 | { | |
217 | /* Copy Normal Character */ | |
218 | To[(*ToIndex)] = From[(*FromIndex)]; | |
219 | (*ToIndex) += 1; | |
220 | (*FromIndex) += 1; | |
221 | } | |
222 | } | |
223 | } | |
224 | ||
225 | static unsigned int Escape (char ch) | |
226 | { | |
227 | return ch == esc; | |
228 | /* static analysis guarentees a RETURN statement will be used before here. */ | |
229 | __builtin_unreachable (); | |
230 | } | |
231 | ||
232 | static unsigned int Space (char ch) | |
233 | { | |
234 | return (ch == space) || (ch == tab); | |
235 | /* static analysis guarentees a RETURN statement will be used before here. */ | |
236 | __builtin_unreachable (); | |
237 | } | |
238 | ||
239 | static unsigned int DoubleQuote (char ch) | |
240 | { | |
241 | return ch == dquote; | |
242 | /* static analysis guarentees a RETURN statement will be used before here. */ | |
243 | __builtin_unreachable (); | |
244 | } | |
245 | ||
246 | static unsigned int SingleQuote (char ch) | |
247 | { | |
248 | return ch == squote; | |
249 | /* static analysis guarentees a RETURN statement will be used before here. */ | |
250 | __builtin_unreachable (); | |
251 | } | |
252 | ||
253 | ||
254 | /* | |
255 | GetArg - takes a command line and attempts to extract argument, n, | |
256 | from CmdLine. The resulting argument is placed into, a. | |
257 | The result of the operation is returned. | |
258 | */ | |
259 | ||
260 | extern "C" unsigned int CmdArgs_GetArg (const char *CmdLine_, unsigned int _CmdLine_high, unsigned int n, char *Argi, unsigned int _Argi_high) | |
261 | { | |
262 | unsigned int Index; | |
263 | unsigned int i; | |
264 | unsigned int Another; | |
265 | char CmdLine[_CmdLine_high+1]; | |
266 | ||
267 | /* make a local copy of each unbounded array. */ | |
268 | memcpy (CmdLine, CmdLine_, _CmdLine_high+1); | |
269 | ||
270 | Index = 0; | |
271 | /* Continually retrieve an argument until we get the n th argument. */ | |
272 | i = 0; | |
273 | do { | |
274 | Another = GetNextArg ((const char *) CmdLine, _CmdLine_high, &Index, (char *) Argi, _Argi_high); | |
275 | i += 1; | |
276 | } while (! ((i > n) || ! Another)); | |
277 | return i > n; | |
278 | /* static analysis guarentees a RETURN statement will be used before here. */ | |
279 | __builtin_unreachable (); | |
280 | } | |
281 | ||
282 | ||
283 | /* | |
284 | Narg - returns the number of arguments available from | |
285 | command line, CmdLine. | |
286 | */ | |
287 | ||
288 | extern "C" unsigned int CmdArgs_Narg (const char *CmdLine_, unsigned int _CmdLine_high) | |
289 | { | |
290 | typedef struct Narg__T1_a Narg__T1; | |
291 | ||
292 | struct Narg__T1_a { char array[1000+1]; }; | |
293 | Narg__T1 a; | |
294 | unsigned int ArgNo; | |
295 | char CmdLine[_CmdLine_high+1]; | |
296 | ||
297 | /* make a local copy of each unbounded array. */ | |
298 | memcpy (CmdLine, CmdLine_, _CmdLine_high+1); | |
299 | ||
300 | ArgNo = 0; | |
301 | while (CmdArgs_GetArg ((const char *) CmdLine, _CmdLine_high, ArgNo, (char *) &a.array[0], 1000)) | |
302 | { | |
303 | ArgNo += 1; | |
304 | } | |
305 | /* | |
306 | IF ArgNo>0 | |
307 | THEN | |
308 | DEC(ArgNo) | |
309 | END ; | |
310 | */ | |
311 | return ArgNo; | |
312 | /* static analysis guarentees a RETURN statement will be used before here. */ | |
313 | __builtin_unreachable (); | |
314 | } | |
315 | ||
316 | extern "C" void _M2_CmdArgs_init (__attribute__((unused)) int argc,__attribute__((unused)) char *argv[],__attribute__((unused)) char *envp[]) | |
317 | { | |
318 | } | |
319 | ||
320 | extern "C" void _M2_CmdArgs_finish (__attribute__((unused)) int argc,__attribute__((unused)) char *argv[],__attribute__((unused)) char *envp[]) | |
321 | { | |
322 | } |