usbloadergx/source/themes/gettheme.c

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#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <gctypes.h>
#include <ogc/gx.h>
enum
{
ALIGN_LEFT, ALIGN_RIGHT, ALIGN_CENTRE, ALIGN_TOP, ALIGN_BOTTOM, ALIGN_MIDDLE
};
typedef struct _MSG
{
u32 id;
char* msgstr;
struct _MSG *next;
} MSG;
static MSG *baseMSG=0;
#define HASHWORDBITS 32
/* Defines the so called `hashpjw' function by P.J. Weinberger
[see Aho/Sethi/Ullman, COMPILERS: Principles, Techniques and Tools,
1986, 1987 Bell Telephone Laboratories, Inc.] */
static inline u32 hash_string (const char *str_param)
{
u32 hval, g;
const char *str = str_param;
/* Compute the hash value for the given string. */
hval = 0;
while (*str != '\0')
{
hval <<= 4;
hval += (u8) *str++;
g = hval & ((u32) 0xf << (HASHWORDBITS - 4));
if (g != 0)
{
hval ^= g >> (HASHWORDBITS - 8);
hval ^= g;
}
}
return hval;
}
static MSG *findMSG(u32 id)
{
MSG *msg;
for(msg=baseMSG; msg; msg=msg->next)
{
if(msg->id == id)
return msg;
}
return NULL;
}
static MSG *setMSG(const char *msgid, const char *msgstr)
{
u32 id = hash_string(msgid);
MSG *msg = findMSG(id);
if(!msg)
{
msg = (MSG *)malloc(sizeof(MSG));
msg->id = id;
msg->msgstr = NULL;
msg->next = baseMSG;
baseMSG = msg;
}
if(msg)
{
if(msgstr)
{
if(msg->msgstr) free(msg->msgstr);
msg->msgstr = strdup(msgstr);
}
return msg;
}
return NULL;
}
static inline void ClearPrefixes(char * msg)
{
if(!msg)
return;
const char * ptr = msg;
int i = 0;
while(ptr[0] != '\0')
{
if(ptr[0] == '\\' && (ptr[1] == '\\' || ptr[1] == '"'))
{
++ptr;
}
msg[i] = ptr[0];
++i;
++ptr;
}
msg[i] = '\0';
}
void ThemeCleanUp(void)
{
while(baseMSG)
{
MSG *nextMsg =baseMSG->next;
free(baseMSG->msgstr);
free(baseMSG);
baseMSG = nextMsg;
}
}
bool LoadTheme(const char* themeFile)
{
FILE *f;
char line[200];
char *lastID=NULL;
ThemeCleanUp();
f = fopen(themeFile, "r");
if(!f)
return false;
while (fgets(line, sizeof(line), f))
{
// lines starting with # are comments
if (line[0] == '#')
continue;
else if (strncmp(line, "msgid \"", 7) == 0)
{
char *msgid, *end;
if(lastID) { free(lastID); lastID=NULL;}
msgid = &line[7];
end = strrchr(msgid, '"');
if(end && end-msgid>1)
{
*end = 0;
ClearPrefixes(msgid);
lastID = strdup(msgid);
}
}
else if (strncmp(line, "msgstr \"", 8) == 0)
{
char *msgstr, *end;
if(lastID == NULL)
continue;
msgstr = &line[8];
end = strrchr(msgstr, '"');
if(end && end-msgstr>1)
{
*end = 0;
ClearPrefixes(msgstr);
setMSG(lastID, msgstr);
}
free(lastID);
lastID=NULL;
}
}
fclose(f);
return true;
}
int getThemeInt(const char *msgid)
{
MSG *msg = findMSG(hash_string(msgid));
if(msg) return atoi(msg->msgstr);
return atoi(msgid);
}
int getThemeAlignment(const char *msgid)
{
MSG *msg = findMSG(hash_string(msgid));
const char * string = msgid;
if(msg)
string = msg->msgstr;
while(*string == ' ') string++;
if(strncasecmp(string, "left", strlen("left")) == 0)
return ALIGN_LEFT;
else if(strncasecmp(string, "right", strlen("right")) == 0)
return ALIGN_RIGHT;
else if(strncasecmp(string, "center", strlen("center")) == 0)
return ALIGN_CENTRE;
else if(strncasecmp(string, "top", strlen("top")) == 0)
return ALIGN_TOP;
else if(strncasecmp(string, "bottom", strlen("bottom")) == 0)
return ALIGN_BOTTOM;
else if(strncasecmp(string, "middle", strlen("middle")) == 0)
return ALIGN_MIDDLE;
return -1;
}
GXColor getThemeColor(const char *msgid)
{
MSG *msg = findMSG(hash_string(msgid));
const char * string = msgid;
if(msg)
string = msg->msgstr;
GXColor color = (GXColor) {0, 0, 0, 0};
while(*string == ' ') string++;
while(*string != '\0')
{
if(*string == 'r')
{
string++;
while(*string == ' ' || *string == '=' || *string == ',') string++;
if(*string == '\0')
break;
color.r = atoi(string) & 0xFF;
}
else if(*string == 'g')
{
string++;
while(*string == ' ' || *string == '=' || *string == ',') string++;
if(*string == '\0')
break;
color.g = atoi(string) & 0xFF;
}
else if(*string == 'b')
{
string++;
while(*string == ' ' || *string == '=' || *string == ',') string++;
if(*string == '\0')
break;
color.b = atoi(string) & 0xFF;
}
else if(*string == 'a')
{
string++;
while(*string == ' ' || *string == '=' || *string == ',') string++;
if(*string == '\0')
break;
color.a = atoi(string) & 0xFF;
}
else if(*string == '-')
{
break;
}
++string;
}
return color;
}