📄 lib_str.lst
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127 (CPU_INT32U)(DEF_INT_32U_MAX_VAL / 26u), /* 32-bit mult ovf th for base 26. */
128 (CPU_INT32U)(DEF_INT_32U_MAX_VAL / 27u), /* 32-bit mult ovf th for base 27. */
129 (CPU_INT32U)(DEF_INT_32U_MAX_VAL / 28u), /* 32-bit mult ovf th for base 28. */
130 (CPU_INT32U)(DEF_INT_32U_MAX_VAL / 29u), /* 32-bit mult ovf th for base 29. */
131 (CPU_INT32U)(DEF_INT_32U_MAX_VAL / 30u), /* 32-bit mult ovf th for base 30. */
132 (CPU_INT32U)(DEF_INT_32U_MAX_VAL / 31u), /* 32-bit mult ovf th for base 31. */
133 (CPU_INT32U)(DEF_INT_32U_MAX_VAL / 32u), /* 32-bit mult ovf th for base 32. */
134 (CPU_INT32U)(DEF_INT_32U_MAX_VAL / 33u), /* 32-bit mult ovf th for base 33. */
135 (CPU_INT32U)(DEF_INT_32U_MAX_VAL / 34u), /* 32-bit mult ovf th for base 34. */
136 (CPU_INT32U)(DEF_INT_32U_MAX_VAL / 35u), /* 32-bit mult ovf th for base 35. */
137 (CPU_INT32U)(DEF_INT_32U_MAX_VAL / 36u) /* 32-bit mult ovf th for base 36. */
138 };
139
140
141 /*
142 *********************************************************************************************************
143 * LOCAL GLOBAL VARIABLES
144 *********************************************************************************************************
145 */
146
147
148 /*$PAGE*/
149 /*
150 *********************************************************************************************************
151 * LOCAL FUNCTION PROTOTYPES
152 *********************************************************************************************************
153 */
154
155 static CPU_CHAR *Str_FmtNbr_Int32 ( CPU_INT32U nbr,
156 CPU_INT08U nbr_dig,
157 CPU_INT08U nbr_base,
158 CPU_BOOLEAN nbr_neg,
159 CPU_CHAR lead_char,
160 CPU_BOOLEAN lower_case,
161 CPU_BOOLEAN nul,
162 CPU_CHAR *pstr);
163
164 static CPU_INT32U Str_ParseNbr_Int32(const CPU_CHAR *pstr,
165 CPU_CHAR **pstr_next,
166 CPU_INT08U nbr_base,
167 CPU_BOOLEAN nbr_signed,
168 CPU_BOOLEAN *pnbr_neg);
169
170
171 /*
172 *********************************************************************************************************
173 * LOCAL CONFIGURATION ERRORS
174 *********************************************************************************************************
175 */
176
177
178 /*$PAGE*/
179 /*
180 *********************************************************************************************************
181 * Str_Len()
182 *
183 * Description : Calculate length of a string.
184 *
185 * Argument(s) : pstr Pointer to string (see Note #1).
186 *
187 * Return(s) : Length of string; number of characters in string before terminating NULL character
188 * (see Note #2b1).
189 *
190 * Caller(s) : Application.
191 *
192 * Note(s) : (1) String buffer NOT modified.
193 *
194 * (2) (a) IEEE Std 1003.1, 2004 Edition, Section 'strlen() : DESCRIPTION' states that :
195 *
196 * (1) "The strlen() function shall compute the number of bytes in the string to
197 * which 's' ('pstr') points," ...
198 * (2) "not including the terminating null byte."
199 *
200 * (b) IEEE Std 1003.1, 2004 Edition, Section 'strlen() : RETURN VALUE' states that :
201 *
202 * (1) "The strlen() function shall return the length of 's' ('pstr');" ...
203 * (2) "no return value shall be reserved to indicate an error."
204 *
205 * (3) String length calculation terminates when :
206 *
207 * (a) String pointer points to NULL.
208 * (1) String buffer overlaps with NULL address.
209 * (2) String length calculated for string up to but NOT beyond or including
210 * the NULL address.
211 *
212 * (b) Terminating NULL character found.
213 * (1) String length calculated for string up to but NOT including
214 * the NULL character (see Note #2a2).
215 *********************************************************************************************************
216 */
217
\ In section .text, align 2, keep-with-next
218 CPU_SIZE_T Str_Len (const CPU_CHAR *pstr)
219 {
\ Str_Len:
\ 00000000 38B5 PUSH {R3-R5,LR}
\ 00000002 0400 MOVS R4,R0
220 CPU_SIZE_T len;
221
222
223 len = Str_Len_N(pstr,
224 DEF_INT_CPU_U_MAX_VAL);
\ 00000004 5FF0FF31 MOVS R1,#-1
\ 00000008 2000 MOVS R0,R4
\ 0000000A ........ BL Str_Len_N
\ 0000000E 0500 MOVS R5,R0
225
226 return (len);
\ 00000010 2800 MOVS R0,R5
\ 00000012 32BD POP {R1,R4,R5,PC} ;; return
227 }
228
229
230 /*$PAGE*/
231 /*
232 *********************************************************************************************************
233 * Str_Len_N()
234 *
235 * Description : Calculate length of a string, up to a maximum number of characters.
236 *
237 * Argument(s) : pstr Pointer to string (see Note #1).
238 *
239 * len_max Maximum number of characters to search (see Note #3c).
240 *
241 * Return(s) : Length of string; number of characters in string before terminating NULL character,
242 * if terminating NULL character found (see Note #2b1).
243 *
244 * Requested maximum number of characters to search,
245 * if terminating NULL character NOT found (see Note #3c).
246 *
247 * Caller(s) : Application.
248 *
249 * Note(s) : (1) String buffer NOT modified.
250 *
251 * (2) (a) IEEE Std 1003.1, 2004 Edition, Section 'strlen() : DESCRIPTION' states that :
252 *
253 * (1) "The strlen() function shall compute the number of bytes in the string to
254 * which 's' ('pstr') points," ...
255 * (2) "not including the terminating null byte."
256 *
257 * (b) IEEE Std 1003.1, 2004 Edition, Section 'strlen() : RETURN VALUE' states that :
258 *
259 * (1) "The strlen() function shall return the length of 's' ('pstr');" ...
260 * (2) "no return value shall be reserved to indicate an error."
261 *
262 * (3) String length calculation terminates when :
263 *
264 * (a) String pointer points to NULL.
265 * (1) String buffer overlaps with NULL address.
266 * (2) String length calculated for string up to but NOT beyond or including
267 * the NULL address.
268 *
269 * (b) Terminating NULL character found.
270 * (1) String length calculated for string up to but NOT including
271 * the NULL character (see Note #2a2).
272 *
273 * (c) 'len_max' number of characters searched.
274 * (1) 'len_max' number of characters does NOT include the terminating NULL character.
275 *********************************************************************************************************
276 */
277
\ In section .text, align 2, keep-with-next
278 CPU_SIZE_T Str_Len_N (const CPU_CHAR *pstr,
279 CPU_SIZE_T len_max)
280 {
\ Str_Len_N:
\ 00000000 10B4 PUSH {R4}
\ 00000002 0200 MOVS R2,R0
281 const CPU_CHAR *pstr_len;
282 CPU_SIZE_T len;
283
284
285 pstr_len = pstr;
\ 00000004 1300 MOVS R3,R2
286 len = 0u;
\ 00000006 0024 MOVS R4,#+0
\ 00000008 2000 MOVS R0,R4
287 while (( pstr_len != (const CPU_CHAR *) 0 ) && /* Calc str len until NULL ptr (see Note #3a) ... */
288 (*pstr_len != ( CPU_CHAR )'\0') && /* ... or NULL char found (see Note #3b) ... */
289 ( len < ( CPU_SIZE_T)len_max)) { /* ... or max nbr chars srch'd (see Note #3c). */
\ ??Str_Len_N_0:
\ 0000000A 002B CMP R3,#+0
\ 0000000C 07D0 BEQ.N ??Str_Len_N_1
\ 0000000E 1C78 LDRB R4,[R3, #+0]
\ 00000010 002C CMP R4,#+0
\ 00000012 04D0 BEQ.N ??Str_Len_N_1
\ 00000014 8842 CMP R0,R1
\ 00000016 02D2 BCS.N ??Str_Len_N_1
290 pstr_len++;
\ 00000018 5B1C ADDS R3,R3,#+1
291 len++;
\ 0000001A 401C ADDS R0,R0,#+1
\ 0000001C F5E7 B.N ??Str_Len_N_0
292 }
293
294 return (len); /* Rtn str len (see Note #3b1). */
\ ??Str_Len_N_1:
\ 0000001E 10BC POP {R4}
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