slight reorganization of badroff.c

1 files changed, 18 insertions, 9 deletions

diff --git a/badroff.c b/badroff.c
index 084fa53..adf3e41 100644
--- a/badroff.c
+++ b/badroff.c
@@ -15,12 +15,11 @@ FILE* getfile(int argc, char** argv){
         return stdin;
 }
 
+// file read & buffer fill helpers
+
 FILE* in;
 buf* inbuf;
 
-int width = 80;
-bool brk = false; // not implemented
-
 size_t fillbuf(size_t len){ // returns real len
     int c;
     size_t set;
@@ -40,14 +39,18 @@ size_t chrfill(char chr){
     return line;
 }
 
-char* center(char* text){
-    size_t len = strlen(text);
+// typesetting config and commands to change.
+int width = 80;
+bool brk = false; // not implemented
+
+char* center(char* txt){
+    size_t len = strlen(txt);
     int max = width/2 + len/2; // excluding terminator
-    int min = max-len+1; // first index of *text
+    int min = max-len+1; // first index of *txt
     char* str = malloc(sizeof(char)*(max + 1));
     str[max] = 0;
     for (int i=0; i < min; i++) str[i] = ' ';
-    memcpy(str+min, text, len);
+    memcpy(str+min, txt, len);
     return str;
 }
 char* setwidth(char* txt){
@@ -67,18 +70,22 @@ char* cmd(void){
 
         int cmp = strncmp(dat, mval, strlen(mval));
         if (cmp < 0) // dat < mval
-            low = mid + 1;
-        else if (cmp > 0)
             high = mid - 1;
+        else if (cmp > 0)
+            low = mid + 1;
         else return call[mid](dat+strlen(mval));
     }
     return NULL;
 }
 
+// normal typesetting 
+
 char* typeset(void){
     return popstrbuf(inbuf, chrfill('\n'));
 }
 
+// a parser to choose when to typeset and when to run a command
+
 char* line(void){
     size_t sz;
     if ( (sz = fillbuf(2)) == 0)
@@ -95,6 +102,8 @@ char* line(void){
     }
 }
 
+// orchestration
+
 int main(int argc, char** argv){
     int c;
     in = getfile(argc, argv);