From d52e93c94784d59db2438383da868215b4847db1 Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Tue, 30 Apr 2024 15:18:24 -0500
Subject: [PATCH] Create generated/tags.h with sed and bash instead of C.

---
 scripts/make.sh  | 18 ++++++++++-----
 scripts/mktags.c | 58 ------------------------------------------------
 2 files changed, 12 insertions(+), 64 deletions(-)
 delete mode 100644 scripts/mktags.c

diff --git a/scripts/make.sh b/scripts/make.sh
index b94751dd1..ff677d5d4 100755
--- a/scripts/make.sh
+++ b/scripts/make.sh
@@ -212,12 +212,18 @@ fi
   echo "} this;"
 } > "$GENDIR"/globals.h || exit 1
 
-hostcomp mktags
-if isnewer tags.h toys
-then
-  $SED -n '/TAGGED_ARRAY(/,/^)/{s/.*TAGGED_ARRAY[(]\([^,]*\),/\1/;p}' \
-    toys/*/*.c lib/*.c | "$UNSTRIPPED"/mktags > "$GENDIR"/tags.h
-fi
+# Recreate tags.h
+$SED -ne '/TAGGED_ARRAY(/,/^)/{s/.*TAGGED_ARRAY[(]\([^,]*\),/\1/p' \
+  -e 's/[^{]*{"\([^"]*\)"[^{]*/ _\1/gp}' toys/*/*.c | tr '[:punct:]' _ | \
+while read i; do
+  [ "$i" = "${i#_}" ] && { HEAD="$i"; X=0; LL=; continue;}
+  for j in $i; do
+    [ $X -eq 32 ] && LL=LL
+    NAME="$HEAD$j"
+    printf "#define $NAME %*s%s\n#define _$NAME %*s%s\n" \
+      $((32-${#NAME})) "" "$X" $((31-${#NAME})) "" "(1$LL<<$((X++)))" || exit 1
+  done
+done > "$GENDIR"/tags.h || exit 1
 
 # Create help.h, and zhelp.h if zcat enabled
 hostcomp config2help
diff --git a/scripts/mktags.c b/scripts/mktags.c
deleted file mode 100644
index 05494b2a5..000000000
--- a/scripts/mktags.c
+++ /dev/null
@@ -1,58 +0,0 @@
-// Process TAGGED_ARRAY() macros to emit TAG_STRING index macros.
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-
-int main(int argc, char *argv[])
-{
-  char *tag = 0;
-  int idx = 0;
-
-  for (;;) {
-    char *line = 0, *s;
-    ssize_t len;
-
-    len = getline(&line, (void *)&len, stdin);
-    if (len<0) break;
-    while (len && isspace(line[len-1])) line[--len]=0;
-
-    // Very simple parser: If we haven't got a TAG then first line is TAG.
-    // Then look for { followed by "str" (must be on same line, may have
-    // more than one per line), for each one emit #define. Current TAG ended
-    // by ) at start of line.
-
-    if (!tag) {
-      if (!isalpha(*line)) {
-        fprintf(stderr, "bad tag %s\n", line);
-        exit(1);
-      }
-      tag = strdup(line);
-      idx = 0;
-
-      continue;
-    }
-
-    for (s = line; isspace(*s); s++);
-    if (*s == ')') tag = 0;
-    else for (;;) {
-      char *start;
-
-      while (*s && *s != '{') s++;
-      while (*s && *s != '"') s++;
-      if (!*s) break;
-
-      start = ++s;
-      while (*s && *s != '"') {
-        if (!isalpha(*s) && !isdigit(*s)) *s = '_';
-        s++;
-      }
-      printf("#define %s_%*.*s %d\n", tag, -40, (int)(s-start), start, idx);
-      printf("#define _%s_%*.*s (1%s<<%d)\n", tag, -39, (int)(s-start), start,
-        idx>31 ? "LL": "", idx);
-      idx++;
-    }
-    free(line);
-  }
-}