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/*
* XFontName.c
*
* build/parse X Font name strings
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <X11/Xlib.h>
#include <X11/Intrinsic.h>
#include "XFontName.h"
#include <ctype.h>
static const char *
extractStringField(const char *name, char *buffer, int size,
unsigned int *attrp, unsigned int bit)
{
char *buf = buffer;
if (!*name)
return NULL;
while (*name && *name != '-' && size > 0) {
*buf++ = *name++;
--size;
}
if (size <= 0)
return NULL;
*buf = '\0';
if (buffer[0] != '*' || buffer[1] != '\0')
*attrp |= bit;
if (*name == '-')
return name + 1;
return name;
}
static const char *
extractUnsignedField(const char *name, unsigned int *result,
unsigned int *attrp, unsigned int bit)
{
char buf[256];
unsigned int i;
name = extractStringField(name, buf, sizeof(buf), attrp, bit);
if (!name)
return NULL;
if (!(*attrp & bit))
return name;
i = 0;
for (char *c = buf; *c; c++) {
if (!isdigit(*c))
return NULL;
i = i * 10 + (*c - '0');
}
*result = i;
return name;
}
Bool
XParseFontName(const char *fontNameString, XFontName *fontName,
unsigned int *fontNameAttributes)
{
const char *name = fontNameString;
XFontName temp;
unsigned int attributes = 0;
#define GetString(field,bit) do { \
if (!(name = extractStringField \
(name, temp.field, sizeof (temp.field),\
&attributes, bit))) \
return False; \
} while(0)
#define GetUnsigned(field,bit) do { \
if (!(name = extractUnsignedField \
(name, &temp.field, \
&attributes, bit))) \
return False; \
} while(0)
GetString(Registry, FontNameRegistry);
GetString(Foundry, FontNameFoundry);
GetString(FamilyName, FontNameFamilyName);
GetString(WeightName, FontNameWeightName);
GetString(Slant, FontNameSlant);
GetString(SetwidthName, FontNameSetwidthName);
GetString(AddStyleName, FontNameAddStyleName);
GetUnsigned(PixelSize, FontNamePixelSize);
GetUnsigned(PointSize, FontNamePointSize);
GetUnsigned(ResolutionX, FontNameResolutionX);
GetUnsigned(ResolutionY, FontNameResolutionY);
GetString(Spacing, FontNameSpacing);
GetUnsigned(AverageWidth, FontNameAverageWidth);
GetString(CharSetRegistry, FontNameCharSetRegistry);
if (!*name) {
temp.CharSetEncoding[0] = '\0';
attributes |= FontNameCharSetEncoding;
}
else {
GetString(CharSetEncoding, FontNameCharSetEncoding);
}
*fontName = temp;
*fontNameAttributes = attributes;
return True;
}
static char *
utoa(unsigned int u, char *s, int size)
{
char *t;
t = s + size;
*--t = '\0';
do
*--t = (u % 10) + '0';
while (u /= 10);
return t;
}
Bool
XFormatFontName(XFontName *fontName, unsigned int fontNameAttributes,
XFontNameString fontNameString)
{
XFontNameString tmp;
char *name = tmp;
const char *f;
int left = sizeof(tmp) - 1;
char number[32];
#define PutString(field, bit) do { \
f = (fontNameAttributes & bit) ? \
fontName->field \
: "*"; \
if ((left -= strlen (f)) < 0) \
return False; \
while (*f) \
if ((*name++ = *f++) == '-') \
return False; \
} while(0)
#define PutHyphen() do { \
if (--left < 0) \
return False; \
*name++ = '-'; \
} while(0)
#define PutUnsigned(field, bit) do { \
f = (fontNameAttributes & bit) ? \
utoa (fontName->field, number, sizeof (number)) \
: "*"; \
if ((left -= strlen (f)) < 0) \
return False; \
while (*f) \
*name++ = *f++; \
} while(0)
PutString(Registry, FontNameRegistry);
PutHyphen();
PutString(Foundry, FontNameFoundry);
PutHyphen();
PutString(FamilyName, FontNameFamilyName);
PutHyphen();
PutString(WeightName, FontNameWeightName);
PutHyphen();
PutString(Slant, FontNameSlant);
PutHyphen();
PutString(SetwidthName, FontNameSetwidthName);
PutHyphen();
PutString(AddStyleName, FontNameAddStyleName);
PutHyphen();
PutUnsigned(PixelSize, FontNamePixelSize);
PutHyphen();
PutUnsigned(PointSize, FontNamePointSize);
PutHyphen();
PutUnsigned(ResolutionX, FontNameResolutionX);
PutHyphen();
PutUnsigned(ResolutionY, FontNameResolutionY);
PutHyphen();
PutString(Spacing, FontNameSpacing);
PutHyphen();
PutUnsigned(AverageWidth, FontNameAverageWidth);
PutHyphen();
PutString(CharSetRegistry, FontNameCharSetRegistry);
PutHyphen();
PutString(CharSetEncoding, FontNameCharSetEncoding);
*name = '\0';
strncpy (fontNameString, tmp, sizeof(XFontNameString));
fontNameString[sizeof(XFontNameString) - 1] = '\0';
return True;
}
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