Commit | Line | Data |
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57879fc8 | 1 | #ifndef lint |
60de5df9 | 2 | static char sccsid[] = "@(#)parser2.c 3.10 %G%"; |
57879fc8 EW |
3 | #endif |
4 | ||
60de5df9 EW |
5 | /* |
6 | * Copyright (c) 1983 Regents of the University of California, | |
7 | * All rights reserved. Redistribution permitted subject to | |
8 | * the terms of the Berkeley Software License Agreement. | |
9 | */ | |
10 | ||
57879fc8 | 11 | #include "parser.h" |
0173496c EW |
12 | #include "var.h" |
13 | #include "lcmd.h" | |
bb4a0c0b | 14 | #include "alias.h" |
57879fc8 EW |
15 | |
16 | /* | |
17 | * name == 0 means we don't have a function name but | |
18 | * want to parse the arguments anyway. flag == 0 in this case. | |
19 | */ | |
20 | p_function(name, v, flag) | |
21 | char *name; | |
22 | register struct value *v; | |
23 | { | |
24 | struct value t; | |
bb4a0c0b EW |
25 | register struct lcmd_tab *c = 0; |
26 | register struct alias *a = 0; | |
855d0f8f EW |
27 | register struct lcmd_arg *ap; /* this arg */ |
28 | struct lcmd_arg *lp = 0; /* list arg */ | |
57879fc8 | 29 | register i; |
1f12ea41 | 30 | struct value av[LCMD_NARG + 1]; |
4222244b | 31 | register struct value *vp; |
57879fc8 | 32 | |
bb4a0c0b EW |
33 | if (name != 0) |
34 | if (c = lcmd_lookup(name)) | |
35 | name = c->lc_name; | |
36 | else if (a = alias_lookup(name)) | |
37 | name = a->a_name; | |
38 | else { | |
39 | p_error("%s: No such command or alias.", name); | |
57879fc8 EW |
40 | flag = 0; |
41 | } | |
57879fc8 | 42 | |
bb4a0c0b EW |
43 | for (vp = av; vp < &av[LCMD_NARG + 1]; vp++) |
44 | vp->v_type = V_ERR; | |
57879fc8 | 45 | |
ba5c0855 EW |
46 | if (token == T_LP) |
47 | (void) s_gettok(); | |
48 | i = 0; | |
49 | for (;;) { | |
855d0f8f EW |
50 | ap = 0; |
51 | vp = 0; | |
ba5c0855 EW |
52 | if (token == T_COMMA) /* null argument */ |
53 | t.v_type = V_ERR; | |
54 | else { | |
55 | if (p_expr0(&t, flag) < 0) | |
56 | break; | |
57 | if (t.v_type == V_ERR) | |
58 | flag = 0; | |
59 | } | |
57879fc8 | 60 | if (token != T_ASSIGN) { |
855d0f8f EW |
61 | if (i >= LCMD_NARG || |
62 | c != 0 && (ap = lp) == 0 && | |
63 | (ap = c->lc_arg + i)->arg_name == 0) { | |
bb4a0c0b EW |
64 | p_error("%s: Too many arguments.", name); |
65 | flag = 0; | |
66 | } else | |
67 | vp = &av[i++]; | |
57879fc8 EW |
68 | } else { |
69 | char *tmp; | |
bb4a0c0b EW |
70 | if (p_convstr(&t) < 0) |
71 | goto abort; | |
72 | tmp = t.v_type == V_STR ? t.v_str : 0; | |
57879fc8 EW |
73 | (void) s_gettok(); |
74 | if (p_expr(&t, flag) < 0) { | |
75 | if (tmp) | |
76 | str_free(tmp); | |
77 | p_synerror(); | |
78 | goto abort; | |
79 | } | |
80 | if (t.v_type == V_ERR) | |
81 | flag = 0; | |
82 | if (tmp) { | |
bb4a0c0b EW |
83 | if (c == 0) { |
84 | /* an aliase */ | |
85 | p_error("%s: Bad alias syntax.", name); | |
57879fc8 | 86 | flag = 0; |
bb4a0c0b EW |
87 | } else { |
88 | for (ap = c->lc_arg, vp = av; | |
89 | ap != 0 && ap->arg_name != 0 && | |
855d0f8f EW |
90 | (*ap->arg_name == '\0' || |
91 | !str_match(tmp, ap->arg_name, | |
92 | ap->arg_minlen)); | |
bb4a0c0b EW |
93 | ap++, vp++) |
94 | ; | |
95 | if (ap == 0 || ap->arg_name == 0) { | |
96 | p_error("%s: Unknown argument \"%s\".", | |
97 | name, tmp); | |
98 | flag = 0; | |
99 | ap = 0; | |
100 | vp = 0; | |
101 | } | |
57879fc8 EW |
102 | } |
103 | str_free(tmp); | |
104 | } | |
105 | } | |
106 | if (ap != 0) { | |
855d0f8f EW |
107 | if (ap->arg_flags & ARG_LIST) { |
108 | i = vp - av + 1; | |
109 | lp = ap; | |
110 | } | |
4222244b | 111 | if (vp->v_type != V_ERR) { |
855d0f8f EW |
112 | if (*ap->arg_name) |
113 | p_error("%s: Argument %d (%s) duplicated.", | |
114 | name, vp - av + 1, | |
115 | ap->arg_name); | |
116 | else | |
117 | p_error("%s: Argument %d duplicated.", | |
118 | name, vp - av + 1); | |
57879fc8 | 119 | flag = 0; |
1f12ea41 | 120 | vp = 0; |
57879fc8 EW |
121 | } else if (t.v_type == V_ERR) { |
122 | /* do nothing */ | |
855d0f8f EW |
123 | } else if ((ap->arg_flags&ARG_TYPE) == ARG_NUM && |
124 | t.v_type != V_NUM || | |
125 | (ap->arg_flags&ARG_TYPE) == ARG_STR && | |
126 | t.v_type != V_STR) { | |
127 | if (*ap->arg_name) | |
128 | p_error("%s: Argument %d (%s) type mismatch.", | |
129 | name, vp - av + 1, | |
130 | ap->arg_name); | |
131 | else | |
132 | p_error("%s: Argument %d type mismatch.", | |
133 | name, vp - av + 1); | |
57879fc8 | 134 | flag = 0; |
1f12ea41 EW |
135 | vp = 0; |
136 | } | |
57879fc8 | 137 | } |
1f12ea41 EW |
138 | if (vp != 0) |
139 | *vp = t; | |
140 | else | |
141 | val_free(t); | |
57879fc8 EW |
142 | if (token == T_COMMA) |
143 | (void) s_gettok(); | |
144 | } | |
145 | ||
146 | if (p_erred()) | |
147 | flag = 0; | |
ba5c0855 EW |
148 | if (token == T_RP) |
149 | (void) s_gettok(); | |
150 | else if (token != T_EOL && token != T_EOF) | |
1f12ea41 | 151 | flag = 0; /* look for legal follow set */ |
57879fc8 EW |
152 | v->v_type = V_ERR; |
153 | if (flag) | |
bb4a0c0b EW |
154 | if (c != 0) |
155 | (*c->lc_func)(v, av); | |
156 | else | |
7293cf8d EW |
157 | if (a->a_flags & A_INUSE) |
158 | p_error("%s: Recursive alias.", a->a_name); | |
159 | else { | |
160 | a->a_flags |= A_INUSE; | |
161 | if (dolongcmd(a->a_buf, av, i) < 0) | |
162 | p_memerror(); | |
163 | a->a_flags &= ~A_INUSE; | |
164 | } | |
bb4a0c0b EW |
165 | if (p_abort()) { |
166 | val_free(*v); | |
167 | v->v_type = V_ERR; | |
168 | goto abort; | |
169 | } | |
170 | for (vp = av; vp < &av[LCMD_NARG]; vp++) | |
171 | val_free(*vp); | |
57879fc8 EW |
172 | return 0; |
173 | abort: | |
bb4a0c0b EW |
174 | for (vp = av; vp < &av[LCMD_NARG]; vp++) |
175 | val_free(*vp); | |
57879fc8 EW |
176 | return -1; |
177 | } | |
178 | ||
179 | p_assign(name, v, flag) | |
180 | char *name; | |
181 | struct value *v; | |
182 | char flag; | |
183 | { | |
184 | (void) s_gettok(); | |
185 | ||
186 | if (p_expr(v, flag) < 0) { | |
187 | p_synerror(); | |
188 | return -1; | |
189 | } | |
190 | switch (v->v_type) { | |
191 | case V_STR: | |
192 | case V_NUM: | |
193 | if (flag && var_set(name, v) == 0) { | |
194 | p_memerror(); | |
195 | val_free(*v); | |
196 | return -1; | |
197 | } | |
198 | break; | |
199 | } | |
200 | return 0; | |
201 | } |