XFontName.c revision c166fba9 
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	char		*c;
47	unsigned int	i;
48
49	name = extractStringField (name, buf, sizeof (buf), attrp, bit);
50	if (!name)
51		return NULL;
52	if (!(*attrp & bit))
53		return name;
54	i = 0;
55	for (c = buf; *c; c++) {
56		if (!isdigit (*c))
57			return NULL;
58		i = i * 10 + (*c - '0');
59	}
60	*result = i;
61	return name;
62}
63
64Bool
65XParseFontName (XFontNameString fontNameString, XFontName *fontName,
66		unsigned int *fontNameAttributes)
67{
68	char		*name = fontNameString;
69	XFontName	temp;
70	unsigned int	attributes = 0;
71
72#define GetString(field,bit)\
73	if (!(name = extractStringField \
74		(name, temp.field, sizeof (temp.field),\
75		&attributes, bit))) \
76		return False;
77
78#define GetUnsigned(field,bit)\
79	if (!(name = extractUnsignedField \
80		(name, &temp.field, \
81		&attributes, bit))) \
82		return False;
83
84	GetString (Registry, FontNameRegistry)
85	GetString (Foundry, FontNameFoundry)
86	GetString (FamilyName, FontNameFamilyName)
87	GetString (WeightName, FontNameWeightName)
88	GetString (Slant, FontNameSlant)
89	GetString (SetwidthName, FontNameSetwidthName)
90	GetString (AddStyleName, FontNameAddStyleName)
91	GetUnsigned (PixelSize, FontNamePixelSize)
92	GetUnsigned (PointSize, FontNamePointSize)
93	GetUnsigned (ResolutionX, FontNameResolutionX)
94	GetUnsigned (ResolutionY, FontNameResolutionY)
95	GetString (Spacing, FontNameSpacing)
96	GetUnsigned (AverageWidth, FontNameAverageWidth)
97	GetString (CharSetRegistry, FontNameCharSetRegistry)
98	if (!*name) {
99		temp.CharSetEncoding[0] = '\0';
100		attributes |= FontNameCharSetEncoding;
101	} else {
102		GetString (CharSetEncoding, FontNameCharSetEncoding)
103	}
104	*fontName = temp;
105	*fontNameAttributes = attributes;
106	return True;
107}
108
109static char *
110utoa (
111	unsigned int	u,
112	char		*s,
113	int		size)
114{
115	char	*t;
116
117	t = s + size;
118	*--t = '\0';
119	do
120		*--t = (u % 10) + '0';
121	while (u /= 10);
122	return t;
123}
124
125Bool
126XFormatFontName (XFontName *fontName, unsigned int fontNameAttributes,
127		 XFontNameString fontNameString)
128{
129	XFontNameString	tmp;
130	char		*name = tmp;
131	const char	*f;
132	int		left = sizeof (tmp) - 1;
133	char		number[32];
134
135#define PutString(field, bit)\
136	f = (fontNameAttributes & bit) ? \
137		fontName->field \
138		: "*"; \
139	if ((left -= strlen (f)) < 0) \
140		return False; \
141	while (*f) \
142		if ((*name++ = *f++) == '-') \
143			return False;
144#define PutHyphen()\
145	if (--left < 0) \
146		return False; \
147	*name++ = '-';
148
149#define PutUnsigned(field, bit) \
150	f = (fontNameAttributes & bit) ? \
151		utoa (fontName->field, number, sizeof (number)) \
152		: "*"; \
153	if ((left -= strlen (f)) < 0) \
154		return False; \
155	while (*f) \
156		*name++ = *f++;
157
158	PutString (Registry, FontNameRegistry)
159	PutHyphen ();
160	PutString (Foundry, FontNameFoundry)
161	PutHyphen ();
162	PutString (FamilyName, FontNameFamilyName)
163	PutHyphen ();
164	PutString (WeightName, FontNameWeightName)
165	PutHyphen ();
166	PutString (Slant, FontNameSlant)
167	PutHyphen ();
168	PutString (SetwidthName, FontNameSetwidthName)
169	PutHyphen ();
170	PutString (AddStyleName, FontNameAddStyleName)
171	PutHyphen ();
172	PutUnsigned (PixelSize, FontNamePixelSize)
173	PutHyphen ();
174	PutUnsigned (PointSize, FontNamePointSize)
175	PutHyphen ();
176	PutUnsigned (ResolutionX, FontNameResolutionX)
177	PutHyphen ();
178	PutUnsigned (ResolutionY, FontNameResolutionY)
179	PutHyphen ();
180	PutString (Spacing, FontNameSpacing)
181	PutHyphen ();
182	PutUnsigned (AverageWidth, FontNameAverageWidth)
183	PutHyphen ();
184	PutString (CharSetRegistry, FontNameCharSetRegistry)
185	PutHyphen ();
186	PutString (CharSetEncoding, FontNameCharSetEncoding)
187	*name = '\0';
188	strcpy (fontNameString, tmp);
189	return True;
190}
191