2 * Copyright (C) 2016 Andre Noll <maan@tuebingen.mpg.de>
4 * Licensed under the LGPL v3, see http://www.gnu.org/licenses/lgpl-3.0.html
7 /* We don't want symbols to clash with those of other flex users. */
8 %option prefix="lls_yy"
11 %option never-interactive
17 IDENTIFIER [a-zA-Z]+[a-zA-Z0-9_-]*
18 EQUALS [[:space:]]*=[[:space:]]*
19 OPTION [a-zA-Z]+[a-zA-Z0-9_-]*
27 #include "lopsub-internal.h"
32 static const char *subcommand;
34 static int yywrap(void) {return 1;}
35 static int expand_result(void)
37 int nargc = rargc + 1;
38 char **nrargv = realloc(rargv, (nargc + 1) * sizeof(char *));
48 static int add_option(void)
53 for (n = 0; n < yyleng; n++)
54 if (!isalnum(yytext[n]) && !(yytext[n] == '-'))
57 ret = expand_result();
60 rargv[rargc - 1] = malloc(n + 2 + 1);
61 if (!rargv[rargc - 1])
63 rargv[rargc - 1][0] = rargv[rargc - 1][1] = '-';
64 memcpy(rargv[rargc - 1] + 2, yytext, n);
65 rargv[rargc - 1][n + 2] = '\0';
69 static int parse_arg(char **result)
71 bool backslash = false, quote = false;
76 *result = malloc(yyleng + 1);
79 for (in = yytext, out = *result; *in; in++) {
85 } else if (*in == 'n' || *in == 't') {
86 if (backslash) { /* \n or \t */
87 *out++ = (*in == 'n')? '\n' : '\t';
91 } else if (*in == '"') {
96 } else if (isspace(*in)) {
97 if (!backslash && !quote)
100 /* copy the character */
104 ret = -E_LLS_TRAILING_BACKSLASH;
107 ret = -E_LLS_UNMATCHED_QUOTE;
110 /* look at first non-space character */
116 ret = -E_LLS_TRAILING_GARBAGE;
121 return out - *result;
132 /* skip comments and whitespace */
136 <INITIAL,SC_SCANNING>\[[[:space:]]*{IDENTIFIER}[[:space:]]*\][[:space:]]*\n {
139 assert(yytext[0] == '[');
142 for (i = 1; i < yyleng; i++)
143 if (!isspace(yytext[i]))
145 for (j = i; j < yyleng; j++)
146 if (yytext[j] == ']' || isspace(yytext[j]))
150 if (strcmp(yytext + i, subcommand))
156 <SC_SCANNING>{OPTION}[[:space:]]*\n add_option();
158 <SC_SCANNING>{OPTION}({EQUALS}|[[:space:]]+) {
159 int ret = add_option();
167 const char *opt = rargv[rargc - 1];
169 size_t opt_len = strlen(opt), arg_len;
170 int ret = parse_arg(&arg);
175 result = malloc(opt_len + arg_len + 2);
179 result[opt_len] = '=';
180 strcpy(result + opt_len + 1, arg);
182 result[opt_len + arg_len + 1] = '\0';
183 free(rargv[rargc - 1]);
184 rargv[rargc - 1] = result;
190 /* This rule runs iff none of the above patterns matched */
194 #include <sys/types.h>
195 #include <sys/stat.h>
199 int lls_convert_config(const char *buf, size_t nbytes, const char *subcmd,
200 char ***result, char **errctx)
203 YY_BUFFER_STATE yybs;
213 yybs = yy_scan_bytes(buf, nbytes);
215 return -E_LLS_YY_SCAN;
217 rargv = malloc((rargc + 1) * sizeof(char *));
220 rargv[0] = strdup(__FUNCTION__);
227 yy_delete_buffer(yybs);
233 *errctx = malloc(100);
235 sprintf(*errctx, "error at line %d", yyget_lineno());
237 for (; rargc >= 0; rargc--)
241 return -E_LLS_YY_LEX;
244 void lls_free_argv(char **argv)
250 for (i = 0; argv[i]; i++)
257 char buf[100 * 1024];
258 int ret, len, i, argc;
261 ret = read(STDIN_FILENO, buf, sizeof(buf));
265 ret = lls_convert_config(buf, len, NULL, &argv, NULL);
269 for (i = 0; i < argc; i++)
270 printf("argv[%d]: %s\n", i, rargv[i]);