diff options
Diffstat (limited to 'bpeg.c')
| -rw-r--r-- | bpeg.c | 46 |
1 files changed, 9 insertions, 37 deletions
@@ -1,36 +1,7 @@ /* * bpeg.c - Source code for the bpeg parser * - * Grammar: - * # <comment> comment - * .. any text up to the following pattern (if any); (multiline: ...) - * . any character (multiline: $.) - * ^ beginning of a line (^^: beginning of file) - * $ end of a line ($$: end of file) - * _ 0 or more spaces or tabs (__: include newlines and comments) - * `<c> character <c> - * `<a>-<z> character between <a> and <z> - * \<e> escape sequence (e.g. \n, \033) - * \<e1>-<e2> escape sequence range (e.g. \x00-\xF0) - * ! <pat> no <pat> - * ~ <pat> any character as long as it doesn't match <pat> (multiline: ~~<pat>) - * <N=1> + <pat> [% <sep="">] <N> or more <pat>s (separated by <sep>) - * * <pat> [% <sep="">] sugar for "0+ <pat> [% <sep>]" - * <N=1> - <pat> [% <sep="">] <N> or fewer <pat>s (separated by <sep>) - * ? <pat> sugar for "1- <pat>" - * <N> - <M> <pat> <N> to <M> (inclusive) <pat>s - * < <pat> after <pat>, ... - * > <pat> before <pat>, ... - * ( <pat> ) <pat> - * @ <pat> capture <pat> - * @ [ <name> ] <pat> <pat> named <name> - * { <pat> => <str> } <pat> replaced with <str> - * <pat1> == <pat2> <pat1> iff <pat2> matches at the same spot for the same length - * "@1" or "@[1]" first capture - * "@foo" or "@[foo]" capture named "foo" - * <pat1> <pat2> <pat1> followed by <pat2> - * <pat> / <alt> <pat> otherwise <alt> - * ; <name> = <pat> <name> is defined to be <pat> + * See `man ./bpeg.1` for more details */ #include <fcntl.h> #include <glob.h> @@ -53,8 +24,8 @@ static const char *usage = ( " -v --verbose\t print verbose debugging info\n" " -d --define <name>=<def>\t define a grammar rule\n" " -D --define-string <name>=<def>\t define a grammar rule (string-pattern)\n" - " -e --escaped <pat>\t provide an escaped pattern (equivalent to bpeg '\\(<pat>)')\n" - " -s --string <pat>\t provide a string pattern (equivalent to bpeg '<pat>', but may be useful if '<pat>' begins with a '-')\n" + " -p --pattern <pat>\t provide a pattern (equivalent to bpeg '\\(<pat>)')\n" + " -P --pattern-string <pat>\t provide a string pattern (equivalent to bpeg '<pat>', but may be useful if '<pat>' begins with a '-')\n" " -r --replace <replacement> replace the input pattern with the given replacement\n" " -m --mode <mode>\t set the behavior mode (defult: find-all)\n" " -g --grammar <grammar file> use the specified file as a grammar\n"); @@ -104,14 +75,15 @@ int main(int argc, char *argv[]) { int verbose = 0; char *flag = NULL; + char path[PATH_MAX] = {0}; const char *rule = "find-all"; grammar_t *g = new_grammar(); + // Load builtins: int fd; if ((fd=open("/etc/xdg/bpeg/builtins.bpeg", O_RDONLY)) >= 0) load_grammar(g, readfile(fd)); // Keep in memory for debugging output - char path[PATH_MAX] = {0}; sprintf(path, "%s/.config/bpeg/builtins.bpeg", getenv("HOME")); if ((fd=open(path, O_RDONLY)) >= 0) load_grammar(g, readfile(fd)); // Keep in memory for debugging output @@ -121,10 +93,10 @@ int main(int argc, char *argv[]) if (streq(argv[i], "--")) { ++i; break; - } else if (FLAG("--help") || FLAG("-h")) { + } else if (streq(argv[i], "--help") || streq(argv[i], "-h")) { printf("%s\n", usage); return 0; - } else if (FLAG("--verbose") || FLAG("-v")) { + } else if (streq(argv[i], "--verbose") || streq(argv[i], "-v")) { verbose = 1; } else if (FLAG("--replace") || FLAG("-r")) { vm_op_t *p = bpeg_replacement(bpeg_pattern("pattern"), flag); @@ -166,13 +138,13 @@ int main(int argc, char *argv[]) vm_op_t *pat = bpeg_stringpattern(src); check(pat, "Failed to compile pattern"); add_def(g, src, def, pat); - } else if (FLAG("--escaped") || FLAG("-e")) { + } else if (FLAG("--pattern") || FLAG("-p")) { check(npatterns == 0, "Cannot define multiple patterns"); vm_op_t *p = bpeg_pattern(flag); check(p, "Pattern failed to compile: '%s'", flag); add_def(g, flag, "pattern", p); ++npatterns; - } else if (FLAG("--string") || FLAG("-s")) { + } else if (FLAG("--pattern-string") || FLAG("-P")) { vm_op_t *p = bpeg_stringpattern(flag); check(p, "Pattern failed to compile"); add_def(g, flag, "pattern", p); |