d7482997 |
1 | /* |
2 | * error.c: Halibut error handling |
3 | */ |
4 | |
5 | #include <stdio.h> |
6 | #include <stdlib.h> |
7 | #include <stdarg.h> |
8 | #include "halibut.h" |
9 | |
10 | /* |
11 | * Error flags |
12 | */ |
13 | #define PREFIX 0x0001 /* give `halibut:' prefix */ |
14 | #define FILEPOS 0x0002 /* give file position prefix */ |
15 | |
16 | static void do_error(int code, va_list ap) { |
17 | char error[1024]; |
18 | char auxbuf[256]; |
19 | char *sp, *sp2; |
20 | wchar_t *wsp; |
21 | filepos fpos, fpos2; |
22 | int flags; |
23 | |
24 | switch(code) { |
25 | case err_nomemory: /* no arguments */ |
26 | sprintf(error, "out of memory"); |
27 | flags = PREFIX; |
28 | break; |
29 | case err_optnoarg: |
30 | sp = va_arg(ap, char *); |
31 | sprintf(error, "option `-%.200s' requires an argument", sp); |
32 | flags = PREFIX; |
33 | break; |
34 | case err_nosuchopt: |
35 | sp = va_arg(ap, char *); |
36 | sprintf(error, "unrecognised option `-%.200s'", sp); |
37 | flags = PREFIX; |
38 | break; |
39 | case err_noinput: /* no arguments */ |
40 | sprintf(error, "no input files"); |
41 | flags = PREFIX; |
42 | break; |
43 | case err_cantopen: |
44 | sp = va_arg(ap, char *); |
45 | sprintf(error, "unable to open input file `%.200s'", sp); |
46 | flags = PREFIX; |
47 | break; |
48 | case err_nodata: /* no arguments */ |
49 | sprintf(error, "no data in input files"); |
50 | flags = PREFIX; |
51 | break; |
52 | case err_brokencodepara: |
53 | fpos = *va_arg(ap, filepos *); |
54 | sprintf(error, "every line of a code paragraph should begin `\\c'"); |
55 | flags = FILEPOS; |
56 | break; |
57 | case err_kwunclosed: |
58 | fpos = *va_arg(ap, filepos *); |
59 | sprintf(error, "expected `}' after paragraph keyword"); |
60 | flags = FILEPOS; |
61 | break; |
62 | case err_kwexpected: |
63 | fpos = *va_arg(ap, filepos *); |
64 | sprintf(error, "expected a paragraph keyword"); |
65 | flags = FILEPOS; |
66 | break; |
67 | case err_kwillegal: |
68 | fpos = *va_arg(ap, filepos *); |
69 | sprintf(error, "expected no paragraph keyword"); |
70 | flags = FILEPOS; |
71 | break; |
72 | case err_kwtoomany: |
73 | fpos = *va_arg(ap, filepos *); |
74 | sprintf(error, "expected only one paragraph keyword"); |
75 | flags = FILEPOS; |
76 | break; |
77 | case err_bodyillegal: |
78 | fpos = *va_arg(ap, filepos *); |
79 | sprintf(error, "expected no text after paragraph keyword"); |
80 | flags = FILEPOS; |
81 | break; |
82 | case err_badparatype: |
83 | wsp = va_arg(ap, wchar_t *); |
84 | sp = ustrtoa(wsp, auxbuf, sizeof(auxbuf)); |
85 | fpos = *va_arg(ap, filepos *); |
86 | sprintf(error, "command `%.200s' unrecognised at start of" |
87 | " paragraph", sp); |
88 | flags = FILEPOS; |
89 | break; |
90 | case err_badmidcmd: |
91 | wsp = va_arg(ap, wchar_t *); |
92 | sp = ustrtoa(wsp, auxbuf, sizeof(auxbuf)); |
93 | fpos = *va_arg(ap, filepos *); |
94 | sprintf(error, "command `%.200s' unexpected in mid-paragraph", sp); |
95 | flags = FILEPOS; |
96 | break; |
97 | case err_unexbrace: |
98 | fpos = *va_arg(ap, filepos *); |
99 | sprintf(error, "brace character unexpected in mid-paragraph"); |
100 | flags = FILEPOS; |
101 | break; |
102 | case err_explbr: |
103 | fpos = *va_arg(ap, filepos *); |
104 | sprintf(error, "expected `{' after command"); |
105 | flags = FILEPOS; |
106 | break; |
107 | case err_commenteof: |
108 | fpos = *va_arg(ap, filepos *); |
109 | sprintf(error, "end of file unexpected inside `\\#{...}' comment"); |
110 | flags = FILEPOS; |
111 | break; |
112 | case err_kwexprbr: |
113 | fpos = *va_arg(ap, filepos *); |
114 | sprintf(error, "expected `}' after cross-reference"); |
115 | flags = FILEPOS; |
116 | break; |
117 | case err_missingrbrace: |
118 | fpos = *va_arg(ap, filepos *); |
119 | sprintf(error, "unclosed braces at end of paragraph"); |
120 | flags = FILEPOS; |
121 | break; |
122 | case err_nestedstyles: |
123 | fpos = *va_arg(ap, filepos *); |
124 | sprintf(error, "unable to nest text styles"); |
125 | flags = FILEPOS; |
126 | break; |
127 | case err_nestedindex: |
128 | fpos = *va_arg(ap, filepos *); |
129 | sprintf(error, "unable to nest index markings"); |
130 | flags = FILEPOS; |
131 | break; |
132 | case err_nosuchkw: |
133 | fpos = *va_arg(ap, filepos *); |
134 | wsp = va_arg(ap, wchar_t *); |
135 | sp = ustrtoa(wsp, auxbuf, sizeof(auxbuf)); |
136 | sprintf(error, "unable to resolve cross-reference to `%.200s'", sp); |
137 | flags = FILEPOS; |
138 | break; |
139 | case err_multiBR: |
140 | fpos = *va_arg(ap, filepos *); |
141 | wsp = va_arg(ap, wchar_t *); |
142 | sp = ustrtoa(wsp, auxbuf, sizeof(auxbuf)); |
143 | sprintf(error, "multiple `\\BR' entries given for `%.200s'", sp); |
144 | flags = FILEPOS; |
145 | break; |
146 | case err_nosuchidxtag: |
147 | wsp = va_arg(ap, wchar_t *); |
148 | sp = ustrtoa(wsp, auxbuf, sizeof(auxbuf)); |
149 | sprintf(error, "`\\IM' on unknown index tag `%.200s'", sp); |
150 | flags = 0; |
151 | /* FIXME: need to get a filepos to here somehow */ |
152 | break; |
153 | case err_cantopenw: |
154 | sp = va_arg(ap, char *); |
155 | sprintf(error, "unable to open output file `%.200s'", sp); |
156 | flags = PREFIX; |
157 | break; |
158 | case err_macroexists: |
159 | fpos = *va_arg(ap, filepos *); |
160 | wsp = va_arg(ap, wchar_t *); |
161 | sp = ustrtoa(wsp, auxbuf, sizeof(auxbuf)); |
162 | sprintf(error, "macro `%.200s' already defined", sp); |
163 | flags = FILEPOS; |
164 | break; |
165 | case err_sectjump: |
166 | fpos = *va_arg(ap, filepos *); |
167 | sprintf(error, "expected higher heading levels before this one"); |
168 | flags = FILEPOS; |
169 | break; |
170 | case err_winhelp_ctxclash: |
171 | fpos = *va_arg(ap, filepos *); |
172 | sp = va_arg(ap, char *); |
173 | sp2 = va_arg(ap, char *); |
174 | sprintf(error, "Windows Help context id `%.200s' clashes with " |
175 | "previously defined `%.200s'", sp, sp2); |
176 | flags = FILEPOS; |
177 | break; |
178 | case err_multikw: |
179 | fpos = *va_arg(ap, filepos *); |
180 | fpos2 = *va_arg(ap, filepos *); |
181 | wsp = va_arg(ap, wchar_t *); |
182 | sp = ustrtoa(wsp, auxbuf, sizeof(auxbuf)); |
183 | sprintf(error, "paragraph keyword `%.200s' already defined at ", sp); |
184 | sprintf(error + strlen(error), "%s:%d", fpos2.filename, fpos2.line); |
185 | flags = FILEPOS; |
186 | break; |
187 | case err_whatever: |
188 | sp = va_arg(ap, char *); |
189 | vsprintf(error, sp, ap); |
190 | flags = PREFIX; |
191 | break; |
192 | } |
193 | |
194 | if (flags & PREFIX) |
195 | fputs("halibut: ", stderr); |
196 | if (flags & FILEPOS) { |
197 | fprintf(stderr, "%s:%d:", fpos.filename, fpos.line); |
198 | if (fpos.col > 0) |
199 | fprintf(stderr, "%d:", fpos.col); |
200 | fputc(' ', stderr); |
201 | } |
202 | fputs(error, stderr); |
203 | fputc('\n', stderr); |
204 | } |
205 | |
206 | void fatal(int code, ...) { |
207 | va_list ap; |
208 | va_start(ap, code); |
209 | do_error(code, ap); |
210 | va_end(ap); |
211 | exit(EXIT_FAILURE); |
212 | } |
213 | |
214 | void error(int code, ...) { |
215 | va_list ap; |
216 | va_start(ap, code); |
217 | do_error(code, ap); |
218 | va_end(ap); |
219 | } |