html: make all strings 'const char *'

None of the html_* functions modify their argument, so they can all be
'const char *' instead of a simple 'char *'.  This removes the need to
cast (or copy) when trying to print a const string.

Signed-off-by: Mark Lodato <lodatom@gmail.com>

1 files changed, 17 insertions, 17 deletions

diff --git a/html.c b/html.c
index 66ba65d..4033200 100644
--- a/html.c
+++ b/html.c
@@ -60,15 +60,15 @@ void html_status(int code, const char *msg, int more_headers)
 {
         htmlf("Status: %d %s\n", code, msg);
         if (!more_headers)
                 html("\n");
 }
 
-void html_txt(char *txt)
+void html_txt(const char *txt)
 {
-        char *t = txt;
+        const char *t = txt;
         while(t && *t){
                 int c = *t;
                 if (c=='<' || c=='>' || c=='&') {
                         write(htmlfd, txt, t - txt);
                         if (c=='>')
                                 html("&gt;");
@@ -81,15 +81,15 @@ void html_txt(char *txt)
                 t++;
         }
         if (t!=txt)
                 html(txt);
 }
 
-void html_ntxt(int len, char *txt)
+void html_ntxt(int len, const char *txt)
 {
-        char *t = txt;
+        const char *t = txt;
         while(t && *t && len--){
                 int c = *t;
                 if (c=='<' || c=='>' || c=='&') {
                         write(htmlfd, txt, t - txt);
                         if (c=='>')
                                 html("&gt;");
@@ -104,15 +104,15 @@ void html_ntxt(int len, char *txt)
         if (t!=txt)
                 write(htmlfd, txt, t - txt);
         if (len<0)
                 html("...");
 }
 
-void html_attr(char *txt)
+void html_attr(const char *txt)
 {
-        char *t = txt;
+        const char *t = txt;
         while(t && *t){
                 int c = *t;
                 if (c=='<' || c=='>' || c=='\'' || c=='\"') {
                         write(htmlfd, txt, t - txt);
                         if (c=='>')
                                 html("&gt;");
@@ -127,15 +127,15 @@ void html_attr(char *txt)
                 t++;
         }
         if (t!=txt)
                 html(txt);
 }
 
-void html_url_path(char *txt)
+void html_url_path(const char *txt)
 {
-        char *t = txt;
+        const char *t = txt;
         while(t && *t){
                 int c = *t;
                 if (c=='"' || c=='#' || c=='\'' || c=='?') {
                         write(htmlfd, txt, t - txt);
                         write(htmlfd, fmt("%%%2x", c), 3);
                         txt = t+1;
@@ -143,15 +143,15 @@ void html_url_path(char *txt)
                 t++;
         }
         if (t!=txt)
                 html(txt);
 }
 
-void html_url_arg(char *txt)
+void html_url_arg(const char *txt)
 {
-        char *t = txt;
+        const char *t = txt;
         while(t && *t){
                 int c = *t;
                 if (c=='"' || c=='#' || c=='%' || c=='&' || c=='\'' || c=='+' || c=='?') {
                         write(htmlfd, txt, t - txt);
                         write(htmlfd, fmt("%%%2x", c), 3);
                         txt = t+1;
@@ -159,34 +159,34 @@ void html_url_arg(char *txt)
                 t++;
         }
         if (t!=txt)
                 html(txt);
 }
 
-void html_hidden(char *name, char *value)
+void html_hidden(const char *name, const char *value)
 {
         html("<input type='hidden' name='");
         html_attr(name);
         html("' value='");
         html_attr(value);
         html("'/>");
 }
 
-void html_option(char *value, char *text, char *selected_value)
+void html_option(const char *value, const char *text, const char *selected_value)
 {
         html("<option value='");
         html_attr(value);
         html("'");
         if (selected_value && !strcmp(selected_value, value))
                 html(" selected='selected'");
         html(">");
         html_txt(text);
         html("</option>\n");
 }
 
-void html_link_open(char *url, char *title, char *class)
+void html_link_open(const char *url, const char *title, const char *class)
 {
         html("<a href='");
         html_attr(url);
         if (title) {
                 html("' title='");
                 html_attr(title);
@@ -254,20 +254,20 @@ char *convert_query_hexchar(char *txt)
                 *txt = d1 * 16 + d2;
                 strcpy(txt+1, txt+3);
                 return txt;
         }
 }
 
-int http_parse_querystring(char *txt, void (*fn)(const char *name, const char *value))
+int http_parse_querystring(const char *txt_, void (*fn)(const char *name, const char *value))
 {
-        char *t, *value = NULL, c;
+        char *t, *txt, *value = NULL, c;
 
-        if (!txt)
+        if (!txt_)
                 return 0;
 
-        t = txt = strdup(txt);
+        t = txt = strdup(txt_);
         if (t == NULL) {
                 printf("Out of memory\n");
                 exit(1);
         }
         while((c=*t) != '\0') {
                 if (c=='=') {