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comparison src/dmlib.c @ 2004:161e731eb152

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Improve dmGetIntVal() to accept an optional negative value boolean flag pointer. Also improve error handling in it.
author Matti Hamalainen <ccr@tnsp.org>
date Sat, 07 Jul 2018 01:11:22 +0300
parents 12d4da502fa4
children 3d40a6767a4e
comparison
equal deleted inserted replaced
2003:2ae47dcaaf10 2004:161e731eb152
134 return ptr; 134 return ptr;
135 } 135 }
136 #endif 136 #endif
137 137
138 138
139 BOOL dmGetIntVal(const char *s, unsigned int *i) 139 BOOL dmGetIntVal(const char *str, unsigned int *value, BOOL *neg)
140 { 140 {
141 if (s[0] == '$') 141 int ch;
142 { 142 BOOL hex = FALSE;
143 if (sscanf(&s[1], "%x", i) < 1) 143
144 // Is the value negative?
145 if (*str == '-')
146 {
147 if (neg == NULL)
144 return FALSE; 148 return FALSE;
145 } 149
146 else if (s[0] == '0' && s[1] == 'x') 150 *neg = TRUE;
147 { 151 str++;
148 if (sscanf(&s[2], "%x", i) < 1)
149 return FALSE;
150 } 152 }
151 else 153 else
152 { 154 if (neg != NULL)
153 if (sscanf(s, "%u", i) < 1) 155 *neg = FALSE;
154 return FALSE; 156
157 // Is it hexadecimal?
158 if (*str == '$')
159 {
160 hex = TRUE;
161 str++;
162 }
163 else
164 if (str[0] == '0' && str[1] == 'x')
165 {
166 hex = TRUE;
167 str += 2;
168 }
169
170 // Parse the value
171 *value = 0;
172 if (hex)
173 {
174 while ((ch = *str++))
175 {
176 if (ch >= '0' && ch <= '9')
177 {
178 *value <<= 4;
179 *value |= ch - '0';
180 }
181 else
182 if (ch >= 'A' && ch <= 'F')
183 {
184 *value <<= 4;
185 *value |= ch - 'A';
186 }
187 else
188 if (ch >= 'a' && ch <= 'f')
189 {
190 *value <<= 4;
191 *value |= ch - 'a';
192 }
193 else
194 return FALSE;
195 }
196 }
197 else
198 {
199 while ((ch = *str++))
200 {
201 if (ch >= '0' && ch <= '9')
202 {
203 *value *= 10;
204 *value += ch - '0';
205 }
206 else
207 return FALSE;
208 }
155 } 209 }
156 return TRUE; 210 return TRUE;
157 } 211 }
158 212
159 213