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/* $Cambridge: hermes/src/prayer/lib/template.c,v 1.6 2008/09/16 09:59:57 dpc22 Exp $ */
/************************************************
* Prayer - a Webmail Interface *
************************************************/
/* Copyright (c) University of Cambridge 2000 - 2008 */
/* See the file NOTICE for conditions of use and distribution. */
#include "lib.h"
/* Support routines for locating and parsing templates */
/* token is \S+ */
#define MAX_TOKEN (63)
char *
template_gettoken(char **sp, struct pool *pool)
{
static char buf[MAX_TOKEN+1];
char *s = *sp;
char *start;
int len;
while (*s && Uisspace(*s))
s++;
start = s;
while (*s && !Uisspace(*s))
s++;
if ((len = s-start) <= MAX_TOKEN) {
memcpy(buf, start, len);
buf[len] = '\0';
} else
buf[0] = '\0';
while (*s && Uisspace(*s))
s++;
*sp = s;
return((pool) ? pool_strdup(pool, buf) : buf);
}
/* Example Variable names:
* $a
* $a->b
* $a->{b}
* ${a->{b}}
* $list[3]->foo
*
*/
#define MAX_VAR_LEN (63)
char *
template_getvar(char **sp, char *quotep, struct pool *pool)
{
static char buf[MAX_VAR_LEN+1];
char *s = *sp;
int depth = 0;
int len = 0;
/* Quoted variable: |n : none, |c : canon, |u : url */
if (quotep)
*quotep = 'n';
while (*s && Uisspace(*s))
s++;
if (!(s && (*s == '$')))
return(NIL);
buf[len++] = *s++;
do {
if (s[0] == '[') {
s++;
buf[0] = '@';
buf[len++] = '-';
while (isdigit(*s) && (len < MAX_VAR_LEN))
buf[len++] = *s++;
if (*s++ != ']')
return(NIL);
continue;
}
if ((s[0] == '-') && (s[1] == '>')) {
buf[len++] = '-';
s += 2;
continue;
}
if (*s == '{') {
s++;
depth++;
} else if (s[0] == '|' && s[1] != '\0' && s[2] == '}') {
if (quotep)
*quotep = s[1];
s += 3;
if (depth <= 0)
return(NIL);
if (--depth == 0)
break;
} else if (*s == '}') {
s++;
if (depth <= 0)
return(NIL);
if (--depth == 0)
break;
} else if (isalnum(*s)) {
buf[len++] = *s++;
} else if (*s == '_') {
buf[len++] = *s++;
} else
break;
} while (*s && (len < MAX_VAR_LEN));
if ((len == 0) || (len >= MAX_VAR_LEN) || (depth < 0))
return(NIL);
*sp = s;
buf[len] = '\0';
s = (buf[0] == '$') ? (buf+1) : buf;
return((pool) ? pool_strdup(pool, s) : s);
}
char *
template_getlist(char **sp, struct pool *pool)
{
static char buf[MAX_VAR_LEN+1];
char *s = *sp;
int len = 0;
while (*s && Uisspace(*s))
s++;
if (!(s && (*s == '@')))
return(NIL);
buf[len++] = *s++;
while ((isalnum(*s) || (*s == '_')) && (len < MAX_VAR_LEN)) {
buf[len++] = *s++;
}
*sp = s;
buf[len] = '\0';
return((pool) ? pool_strdup(pool, buf) : buf);
}
/* expr is token or "quoted text" */
char *
template_getexpr(char **sp, struct pool *pool)
{
char *result;
char *s = *sp;
char *start;
int len;
while (*s && Uisspace(*s))
s++;
if (*s == '"') {
start = ++s;
while (*s && (*s != '"'))
s++;
} else {
start = s;
while (*s && !Uisspace(*s))
s++;
}
len = s-start;
result = pool_alloc(pool, len+1);
memcpy(result, start, len);
result[len] = '\0';
if (*s == '"')
s++;
while (*s && Uisspace(*s))
s++;
*sp = s;
return(result);
}
/* ====================================================================== */
extern struct template_map_index template_map_index[];
struct template *
template_find(char *set, char *name, struct pool *pool)
{
struct template_map_index *tmi = &template_map_index[0];
struct template_map *tm;
unsigned long count;
unsigned long first, last, middle;
int rc;
while (tmi->name && (strcmp(tmi->name, set) != 0))
tmi++;
if (!tmi->name)
return(NIL);
tm = tmi->template_map;
count = *(tmi->count);
first = 0;
last = count;
/* Binary chop */
while (first < last) {
middle = (first + last) / 2;
rc = strcmp(tm[middle].name, name);
if (rc == 0)
return(tm[middle].template);
else if (rc < 0)
first = middle + 1;
else
last = middle;
}
/* Not found */
return (NIL);
}
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