Commit | Line | Data |
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60de5df9 | 1 | /* |
46e9ea25 KB |
2 | * Copyright (c) 1983 Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
3dd3a9e5 KB |
5 | * This code is derived from software contributed to Berkeley by |
6 | * Edward Wang at The University of California, Berkeley. | |
7 | * | |
87f529ec | 8 | * %sccs.include.redist.c% |
60de5df9 EW |
9 | */ |
10 | ||
46e9ea25 | 11 | #ifndef lint |
3dd3a9e5 | 12 | static char sccsid[] = "@(#)parser2.c 3.14 (Berkeley) %G%"; |
46e9ea25 KB |
13 | #endif /* not lint */ |
14 | ||
57879fc8 | 15 | #include "parser.h" |
0173496c EW |
16 | #include "var.h" |
17 | #include "lcmd.h" | |
bb4a0c0b | 18 | #include "alias.h" |
57879fc8 EW |
19 | |
20 | /* | |
21 | * name == 0 means we don't have a function name but | |
22 | * want to parse the arguments anyway. flag == 0 in this case. | |
23 | */ | |
24 | p_function(name, v, flag) | |
25 | char *name; | |
26 | register struct value *v; | |
27 | { | |
28 | struct value t; | |
bb4a0c0b EW |
29 | register struct lcmd_tab *c = 0; |
30 | register struct alias *a = 0; | |
855d0f8f EW |
31 | register struct lcmd_arg *ap; /* this arg */ |
32 | struct lcmd_arg *lp = 0; /* list arg */ | |
57879fc8 | 33 | register i; |
1f12ea41 | 34 | struct value av[LCMD_NARG + 1]; |
4222244b | 35 | register struct value *vp; |
57879fc8 | 36 | |
bb4a0c0b EW |
37 | if (name != 0) |
38 | if (c = lcmd_lookup(name)) | |
39 | name = c->lc_name; | |
40 | else if (a = alias_lookup(name)) | |
41 | name = a->a_name; | |
42 | else { | |
43 | p_error("%s: No such command or alias.", name); | |
57879fc8 EW |
44 | flag = 0; |
45 | } | |
57879fc8 | 46 | |
bb4a0c0b EW |
47 | for (vp = av; vp < &av[LCMD_NARG + 1]; vp++) |
48 | vp->v_type = V_ERR; | |
57879fc8 | 49 | |
ba5c0855 EW |
50 | if (token == T_LP) |
51 | (void) s_gettok(); | |
52 | i = 0; | |
53 | for (;;) { | |
855d0f8f EW |
54 | ap = 0; |
55 | vp = 0; | |
ba5c0855 EW |
56 | if (token == T_COMMA) /* null argument */ |
57 | t.v_type = V_ERR; | |
58 | else { | |
59 | if (p_expr0(&t, flag) < 0) | |
60 | break; | |
61 | if (t.v_type == V_ERR) | |
62 | flag = 0; | |
63 | } | |
57879fc8 | 64 | if (token != T_ASSIGN) { |
855d0f8f EW |
65 | if (i >= LCMD_NARG || |
66 | c != 0 && (ap = lp) == 0 && | |
67 | (ap = c->lc_arg + i)->arg_name == 0) { | |
bb4a0c0b EW |
68 | p_error("%s: Too many arguments.", name); |
69 | flag = 0; | |
70 | } else | |
71 | vp = &av[i++]; | |
57879fc8 EW |
72 | } else { |
73 | char *tmp; | |
bb4a0c0b EW |
74 | if (p_convstr(&t) < 0) |
75 | goto abort; | |
76 | tmp = t.v_type == V_STR ? t.v_str : 0; | |
57879fc8 EW |
77 | (void) s_gettok(); |
78 | if (p_expr(&t, flag) < 0) { | |
79 | if (tmp) | |
80 | str_free(tmp); | |
81 | p_synerror(); | |
82 | goto abort; | |
83 | } | |
84 | if (t.v_type == V_ERR) | |
85 | flag = 0; | |
86 | if (tmp) { | |
bb4a0c0b EW |
87 | if (c == 0) { |
88 | /* an aliase */ | |
89 | p_error("%s: Bad alias syntax.", name); | |
57879fc8 | 90 | flag = 0; |
bb4a0c0b EW |
91 | } else { |
92 | for (ap = c->lc_arg, vp = av; | |
93 | ap != 0 && ap->arg_name != 0 && | |
855d0f8f EW |
94 | (*ap->arg_name == '\0' || |
95 | !str_match(tmp, ap->arg_name, | |
96 | ap->arg_minlen)); | |
bb4a0c0b EW |
97 | ap++, vp++) |
98 | ; | |
99 | if (ap == 0 || ap->arg_name == 0) { | |
100 | p_error("%s: Unknown argument \"%s\".", | |
101 | name, tmp); | |
102 | flag = 0; | |
103 | ap = 0; | |
104 | vp = 0; | |
105 | } | |
57879fc8 EW |
106 | } |
107 | str_free(tmp); | |
108 | } | |
109 | } | |
110 | if (ap != 0) { | |
855d0f8f EW |
111 | if (ap->arg_flags & ARG_LIST) { |
112 | i = vp - av + 1; | |
113 | lp = ap; | |
114 | } | |
4222244b | 115 | if (vp->v_type != V_ERR) { |
855d0f8f EW |
116 | if (*ap->arg_name) |
117 | p_error("%s: Argument %d (%s) duplicated.", | |
118 | name, vp - av + 1, | |
119 | ap->arg_name); | |
120 | else | |
121 | p_error("%s: Argument %d duplicated.", | |
122 | name, vp - av + 1); | |
57879fc8 | 123 | flag = 0; |
1f12ea41 | 124 | vp = 0; |
57879fc8 EW |
125 | } else if (t.v_type == V_ERR) { |
126 | /* do nothing */ | |
855d0f8f EW |
127 | } else if ((ap->arg_flags&ARG_TYPE) == ARG_NUM && |
128 | t.v_type != V_NUM || | |
129 | (ap->arg_flags&ARG_TYPE) == ARG_STR && | |
130 | t.v_type != V_STR) { | |
131 | if (*ap->arg_name) | |
132 | p_error("%s: Argument %d (%s) type mismatch.", | |
133 | name, vp - av + 1, | |
134 | ap->arg_name); | |
135 | else | |
136 | p_error("%s: Argument %d type mismatch.", | |
137 | name, vp - av + 1); | |
57879fc8 | 138 | flag = 0; |
1f12ea41 EW |
139 | vp = 0; |
140 | } | |
57879fc8 | 141 | } |
1f12ea41 EW |
142 | if (vp != 0) |
143 | *vp = t; | |
144 | else | |
145 | val_free(t); | |
57879fc8 EW |
146 | if (token == T_COMMA) |
147 | (void) s_gettok(); | |
148 | } | |
149 | ||
150 | if (p_erred()) | |
151 | flag = 0; | |
ba5c0855 EW |
152 | if (token == T_RP) |
153 | (void) s_gettok(); | |
154 | else if (token != T_EOL && token != T_EOF) | |
1f12ea41 | 155 | flag = 0; /* look for legal follow set */ |
57879fc8 EW |
156 | v->v_type = V_ERR; |
157 | if (flag) | |
bb4a0c0b EW |
158 | if (c != 0) |
159 | (*c->lc_func)(v, av); | |
160 | else | |
7293cf8d EW |
161 | if (a->a_flags & A_INUSE) |
162 | p_error("%s: Recursive alias.", a->a_name); | |
163 | else { | |
164 | a->a_flags |= A_INUSE; | |
165 | if (dolongcmd(a->a_buf, av, i) < 0) | |
166 | p_memerror(); | |
167 | a->a_flags &= ~A_INUSE; | |
168 | } | |
bb4a0c0b EW |
169 | if (p_abort()) { |
170 | val_free(*v); | |
171 | v->v_type = V_ERR; | |
172 | goto abort; | |
173 | } | |
174 | for (vp = av; vp < &av[LCMD_NARG]; vp++) | |
175 | val_free(*vp); | |
57879fc8 EW |
176 | return 0; |
177 | abort: | |
bb4a0c0b EW |
178 | for (vp = av; vp < &av[LCMD_NARG]; vp++) |
179 | val_free(*vp); | |
57879fc8 EW |
180 | return -1; |
181 | } | |
182 | ||
183 | p_assign(name, v, flag) | |
184 | char *name; | |
185 | struct value *v; | |
186 | char flag; | |
187 | { | |
188 | (void) s_gettok(); | |
189 | ||
190 | if (p_expr(v, flag) < 0) { | |
191 | p_synerror(); | |
192 | return -1; | |
193 | } | |
194 | switch (v->v_type) { | |
195 | case V_STR: | |
196 | case V_NUM: | |
197 | if (flag && var_set(name, v) == 0) { | |
198 | p_memerror(); | |
199 | val_free(*v); | |
200 | return -1; | |
201 | } | |
202 | break; | |
203 | } | |
204 | return 0; | |
205 | } |