XFontName.c revision 8c7c3c7e 
1/*
2 * XFontName.c
3 *
4 * build/parse X Font name strings
5 */
6
7# include	<X11/Xlib.h>
8# include	<X11/Intrinsic.h>
9# include	"XFontName.h"
10#include	<ctype.h>
11
12static char *
13extractStringField (
14	char		*name,
15	char		*buffer,
16	int		size,
17	unsigned int	*attrp,
18	unsigned int	bit)
19{
20	char	*buf = buffer;
21
22	if (!*name)
23		return NULL;
24	while (*name && *name != '-' && size > 0) {
25		*buf++ = *name++;
26		--size;
27	}
28	if (size <= 0)
29		return NULL;
30	*buf = '\0';
31	if (buffer[0] != '*' || buffer[1] != '\0')
32		*attrp |= bit;
33	if (*name == '-')
34		return name+1;
35	return name;
36}
37
38static char *
39extractUnsignedField (
40	char		*name,
41	unsigned int	*result,
42	unsigned int	*attrp,
43	unsigned int	bit)
44{
45	char		buf[256];
46	unsigned int	i;
47
48	name = extractStringField (name, buf, sizeof (buf), attrp, bit);
49	if (!name)
50		return NULL;
51	if (!(*attrp & bit))
52		return name;
53	i = 0;
54	for (char *c = buf; *c; c++) {
55		if (!isdigit (*c))
56			return NULL;
57		i = i * 10 + (*c - '0');
58	}
59	*result = i;
60	return name;
61}
62
63Bool
64XParseFontName (XFontNameString fontNameString, XFontName *fontName,
65		unsigned int *fontNameAttributes)
66{
67	char		*name = fontNameString;
68	XFontName	temp;
69	unsigned int	attributes = 0;
70
71#define GetString(field,bit)\
72	if (!(name = extractStringField \
73		(name, temp.field, sizeof (temp.field),\
74		&attributes, bit))) \
75		return False;
76
77#define GetUnsigned(field,bit)\
78	if (!(name = extractUnsignedField \
79		(name, &temp.field, \
80		&attributes, bit))) \
81		return False;
82
83	GetString (Registry, FontNameRegistry)
84	GetString (Foundry, FontNameFoundry)
85	GetString (FamilyName, FontNameFamilyName)
86	GetString (WeightName, FontNameWeightName)
87	GetString (Slant, FontNameSlant)
88	GetString (SetwidthName, FontNameSetwidthName)
89	GetString (AddStyleName, FontNameAddStyleName)
90	GetUnsigned (PixelSize, FontNamePixelSize)
91	GetUnsigned (PointSize, FontNamePointSize)
92	GetUnsigned (ResolutionX, FontNameResolutionX)
93	GetUnsigned (ResolutionY, FontNameResolutionY)
94	GetString (Spacing, FontNameSpacing)
95	GetUnsigned (AverageWidth, FontNameAverageWidth)
96	GetString (CharSetRegistry, FontNameCharSetRegistry)
97	if (!*name) {
98		temp.CharSetEncoding[0] = '\0';
99		attributes |= FontNameCharSetEncoding;
100	} else {
101		GetString (CharSetEncoding, FontNameCharSetEncoding)
102	}
103	*fontName = temp;
104	*fontNameAttributes = attributes;
105	return True;
106}
107
108static char *
109utoa (
110	unsigned int	u,
111	char		*s,
112	int		size)
113{
114	char	*t;
115
116	t = s + size;
117	*--t = '\0';
118	do
119		*--t = (u % 10) + '0';
120	while (u /= 10);
121	return t;
122}
123
124Bool
125XFormatFontName (XFontName *fontName, unsigned int fontNameAttributes,
126		 XFontNameString fontNameString)
127{
128	XFontNameString	tmp;
129	char		*name = tmp;
130	const char	*f;
131	int		left = sizeof (tmp) - 1;
132	char		number[32];
133
134#define PutString(field, bit)\
135	f = (fontNameAttributes & bit) ? \
136		fontName->field \
137		: "*"; \
138	if ((left -= strlen (f)) < 0) \
139		return False; \
140	while (*f) \
141		if ((*name++ = *f++) == '-') \
142			return False;
143#define PutHyphen()\
144	if (--left < 0) \
145		return False; \
146	*name++ = '-';
147
148#define PutUnsigned(field, bit) \
149	f = (fontNameAttributes & bit) ? \
150		utoa (fontName->field, number, sizeof (number)) \
151		: "*"; \
152	if ((left -= strlen (f)) < 0) \
153		return False; \
154	while (*f) \
155		*name++ = *f++;
156
157	PutString (Registry, FontNameRegistry)
158	PutHyphen ();
159	PutString (Foundry, FontNameFoundry)
160	PutHyphen ();
161	PutString (FamilyName, FontNameFamilyName)
162	PutHyphen ();
163	PutString (WeightName, FontNameWeightName)
164	PutHyphen ();
165	PutString (Slant, FontNameSlant)
166	PutHyphen ();
167	PutString (SetwidthName, FontNameSetwidthName)
168	PutHyphen ();
169	PutString (AddStyleName, FontNameAddStyleName)
170	PutHyphen ();
171	PutUnsigned (PixelSize, FontNamePixelSize)
172	PutHyphen ();
173	PutUnsigned (PointSize, FontNamePointSize)
174	PutHyphen ();
175	PutUnsigned (ResolutionX, FontNameResolutionX)
176	PutHyphen ();
177	PutUnsigned (ResolutionY, FontNameResolutionY)
178	PutHyphen ();
179	PutString (Spacing, FontNameSpacing)
180	PutHyphen ();
181	PutUnsigned (AverageWidth, FontNameAverageWidth)
182	PutHyphen ();
183	PutString (CharSetRegistry, FontNameCharSetRegistry)
184	PutHyphen ();
185	PutString (CharSetEncoding, FontNameCharSetEncoding)
186	*name = '\0';
187	strcpy (fontNameString, tmp);
188	return True;
189}
190