| 1 | #include "cparse.h" |
| 2 | #include <sys/types.h> |
| 3 | #include <unistd.h> |
| 4 | #include <sys/wait.h> |
| 5 | |
| 6 | static const char *cpp = "cc"; |
| 7 | static const char **options; |
| 8 | static int noptions = 2; |
| 9 | |
| 10 | static void cc_option(const char *s) { |
| 11 | options = xrealloc(options, ++noptions * sizeof(char *)); |
| 12 | options[noptions - 1] = s; |
| 13 | } |
| 14 | |
| 15 | int commandline(int argc, char **argv) { |
| 16 | int n = 1; |
| 17 | |
| 18 | yy_flex_debug = 0; |
| 19 | while(n < argc && strcmp(argv[n], "--")) { |
| 20 | if(!strcmp(argv[n], "--cpp") && n + 1 < argc) |
| 21 | cpp = argv[++n]; |
| 22 | else if(!strcmp(argv[n], "--no-cpp")) |
| 23 | cpp = 0; |
| 24 | else if(!strcmp(argv[n], "--yydebug")) |
| 25 | yydebug = 1; |
| 26 | else if(!strcmp(argv[n], "--flexdebug")) |
| 27 | yy_flex_debug = 1; |
| 28 | else |
| 29 | cc_option(argv[n]); |
| 30 | ++n; |
| 31 | } |
| 32 | if(n < argc) |
| 33 | ++n; |
| 34 | return n; |
| 35 | } |
| 36 | |
| 37 | struct external_declaration *parse(const char *filename) { |
| 38 | FILE *fp; |
| 39 | pid_t pid = -1, r; |
| 40 | int p[2], w; |
| 41 | struct external_declaration *tu; |
| 42 | |
| 43 | if(cpp) { |
| 44 | if(pipe(p) < 0) fatal(errno, "pipe"); |
| 45 | if((pid = fork()) < 0) fatal(errno, "fork"); |
| 46 | if(!pid) { |
| 47 | exiter = _exit; |
| 48 | if(close(p[0]) < 0) fatal(errno, "close"); |
| 49 | if(p[1] != 1) { |
| 50 | if(dup2(p[1], 1) < 0) fatal(errno, "dup2"); |
| 51 | if(close(p[1]) < 0) fatal(errno, "close"); |
| 52 | } |
| 53 | cc_option(filename); |
| 54 | cc_option(0); |
| 55 | options[0] = cpp; |
| 56 | options[1] = "-E"; |
| 57 | execvp(options[0], (char **)options); |
| 58 | fatal(errno, "execve %s", cpp); |
| 59 | } |
| 60 | if(close(p[1]) < 0) fatal(errno, "close"); |
| 61 | if(!(fp = fdopen(p[0], "r"))) fatal(errno, "fdopen"); |
| 62 | } else |
| 63 | if(!(fp = fopen(filename, "r"))) fatal(errno, "opening %s", filename); |
| 64 | parser_init(fp); |
| 65 | yyparse(); |
| 66 | yyin = 0; |
| 67 | if(fclose(fp) < 0) fatal(errno, "fclose"); |
| 68 | if(cpp) { |
| 69 | while((r = waitpid(pid, &w, 0)) < 0 && errno == EINTR) |
| 70 | ; |
| 71 | if(r < 0) fatal(errno, "waitpid"); |
| 72 | if(w) fatal(0, "%s exited with status %d", cpp, w); |
| 73 | } |
| 74 | tu = translation_unit; |
| 75 | translation_unit = 0; |
| 76 | return tu; |
| 77 | } |
| 78 | |
| 79 | /* |
| 80 | Local Variables: |
| 81 | c-basic-offset:2 |
| 82 | comment-column:40 |
| 83 | End: |
| 84 | */ |