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Fancier grammar loading logic

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This commit is contained in:
Bruce Hill 2020-09-12 15:49:51 -07:00
parent 65f0a29b55
commit c0125378b9
1 changed files with 15 additions and 5 deletions
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20
bpeg.c
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@ -32,6 +32,7 @@
* ; <name> = <pat> <name> is defined to be <pat>
*/
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -78,7 +79,9 @@ int main(int argc, char *argv[])
int fd;
if ((fd=open("/etc/xdg/bpeg/builtins.bpeg", O_RDONLY)) >= 0)
load_grammar(g, readfile(fd));
if ((fd=open("/etc/xdg/bpeg/builtins.bpeg", O_RDONLY)) >= 0)
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));
int i, npatterns = 0;
@ -100,12 +103,19 @@ int main(int argc, char *argv[])
rule = "replace-all";
} else if (FLAG("--grammar") || FLAG("-g")) {
int fd;
const char *grammarfile = flag;
if (streq(grammarfile, "-")) {
if (streq(flag, "-")) {
fd = STDIN_FILENO;
} else {
fd = open(grammarfile, O_RDONLY);
check(fd >= 0, "Couldn't open file: %s", argv[2]);
fd = open(flag, O_RDONLY);
if (fd < 0) {
sprintf(path, "%s/.config/bpeg/%s.bpeg", getenv("HOME"), flag);
fd = open(path, O_RDONLY);
}
if (fd < 0) {
sprintf(path, "/etc/xdg/bpeg/%s.bpeg", flag);
fd = open(path, O_RDONLY);
}
check(fd >= 0, "Couldn't find grammar: %s", flag);
}
load_grammar(g, readfile(fd));
} else if (FLAG("--define") || FLAG("-d")) {