From 0d0b248d03952bdc1298e8fd399a97a91889c755 Mon Sep 17 00:00:00 2001
From: glenda <glenda@r51>
Date: Fri, 31 Jan 2025 04:21:24 +0000
Subject: [PATCH] checkfile

---
 pres.c | 67 ++++++++++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 53 insertions(+), 14 deletions(-)

diff --git a/pres.c b/pres.c
index a988310e5cffa070c87799e9f8522d7dd3881ca2..af24712b2a2bf135923a654e8d226231d0d0ca5f 100644
--- a/pres.c
+++ b/pres.c
@@ -11,15 +11,17 @@ char *file, *contents;
 typedef struct Slide {
 	char *cmd;
 	char *arg;
+	int linum;
 	int nlines;
 	char *lines[];
 } Slide;
 
 char *
-nextline(char **p)
+nextline(char **p, int *linum)
 {
 	char *line;
 	while(1){
+		(*linum)++;
 		line = *p;
 		while(**p != '\n' && **p != '\0') (*p)++;
 		if(**p == '\0')
@@ -32,19 +34,20 @@ nextline(char **p)
 }
 
 Slide *
-nextslide(char **p)
+nextslide(char **p, int *linum)
 {
 	char *cmd, *arg, *line1, *line, *lineN;
-	int nlines, blines, i;
+	int nlines, blines, i, slinum;
 	Slide *s;
 
 	while(1){
-		if((cmd = nextline(p)) == nil)
+		if((cmd = nextline(p, linum)) == nil)
 			return nil;
 		if(cmd[0] != '%')
 			continue;
 		break;
 	}
+	slinum = *linum;
 
 	cmd++;
 	arg = cmd;
@@ -52,10 +55,14 @@ nextslide(char **p)
 	while(*arg != ' ' && *arg != '\t' && *arg != '\0') arg++;
 	if(*arg == '\0')
 		arg = nil;
-	else
+	else{
 		*(arg++) = '\0';
+		while(*arg == ' ' && *arg == '\t' && *arg != '\0') arg++;
+		if(*arg == '\0')
+			arg = nil;
+	}
 
-	line1 = nextline(p);
+	line1 = nextline(p, linum);
 	if(line1 != nil && *line1 == '%'){
 		*p = line1;
 		line1[strlen(line1)] = '\n';
@@ -65,6 +72,7 @@ nextslide(char **p)
 		s = malloc(sizeof(Slide));
 		s->cmd = cmd;
 		s->arg = arg;
+		s->linum = slinum;
 		s->nlines = 0;
 		return s;
 	}
@@ -72,7 +80,7 @@ nextslide(char **p)
 	nlines = 1;
 	blines = 0;
 
-	while((line = nextline(p)) != nil){
+	while((line = nextline(p, linum)) != nil){
 		if(*line == '\0'){
 			blines++;
 			continue;
@@ -93,6 +101,7 @@ nextslide(char **p)
 
 	s->cmd = cmd;
 	s->arg = arg;
+	s->linum = slinum;
 	s->nlines = nlines;
 
 	line = line1;
@@ -105,23 +114,53 @@ nextslide(char **p)
 	return s;
 }
 
+#pragma varargck argpos checkerr 2
+void
+checkerr(Slide *s, char *msg, ...)
+{
+	va_list args;
+
+	va_start(args, msg);
+
+	fprint(2,"%s:%d: %s: ", file, s->linum, s->cmd);
+	vfprint(2,msg, args);
+	fprint(2,"\n");
+}
 void
 checkfile(void)
 {
-	int i;
+	int waserr, linum;
 	char *c2, *p;
 	Slide *s;
 
+	waserr = 0;
+	linum = 0;
+
 	c2 = strdup(contents);
 	p = c2;
 
-	while((s = nextslide(&p)) != nil){
-		print("Slide: %s (%d lines)\n", s->cmd, s->nlines);
-		if(s->arg != nil)
-			print("\targ: %s\n", s->arg);
-		for(i = 0; i < s->nlines; i++)
-			print("\tline %d: %s\n", i, s->lines[i]);
+	while((s = nextslide(&p, &linum)) != nil){
+		if(strcmp(s->cmd, "") == 0)
+			continue;
+		else if(strcmp(s->cmd, "bullet") == 0)
+			continue;
+		else if(strcmp(s->cmd, "blank") == 0)
+			continue;
+		else if(strcmp(s->cmd, "text") == 0)
+			continue;
+		else if(strcmp(s->cmd, "title") == 0){
+			if(s->arg == nil){
+				waserr = 1;
+				checkerr(s, "missing arg");
+			}
+		}else{
+			waserr = 1;
+			checkerr(s, "unknown cmd");
+		}
 	}
+
+	if(waserr)
+		exits("checkfile");
 }
 
 void