7 #include "cl_complex_io.h"
14 #include "cl_real_io.h"
15 #include "cl_float_io.h"
16 #include "cl_rational_io.h"
17 #include "cl_integer_io.h"
18 #include "cl_integer.h"
26 #define floor cln_floor
28 // Step forward over all digits, to the end of string or to the next non-digit.
29 static const char * skip_digits (const char * ptr, const char * string_limit, unsigned int base)
31 for ( ; ptr != string_limit; ptr++) {
33 if ((ch >= '0') && (ch <= '9'))
34 if (ch < '0' + (int)base)
41 if (((ch >= 'A') && (ch < 'A'-10+(int)base))
42 || ((ch >= 'a') && (ch < 'a'-10+(int)base))
52 // Finish reading the "+yi" part of "x+yi" when "x" has already been read.
53 static const cl_N read_complex_number_rest (const cl_read_flags& flags, const char * string_rest, const char * string, const char * string_limit, const char * * end_of_parse, const cl_R& x);
55 #define at_end_of_parse(ptr) \
57 { *end_of_parse = (ptr); } \
59 { if ((ptr) != string_limit) { read_number_junk((ptr),string,string_limit); } }
61 const cl_N read_complex (const cl_read_flags& flags, const char * string, const char * string_limit, const char * * end_of_parse)
63 // If no string_limit is given, it defaults to the end of the string.
65 string_limit = string + strlen(string);
66 if (flags.syntax & syntax_rational) {
67 // Check for rational number syntax.
68 var unsigned int rational_base = flags.rational_base;
69 var const char * ptr = string;
70 if (flags.lsyntax & lsyntax_commonlisp) {
71 if (ptr == string_limit) goto not_rational_syntax;
73 // Check for #b, #o, #x, #nR syntax.
75 if (ptr == string_limit) goto not_rational_syntax;
78 rational_base = 2; break;
80 rational_base = 8; break;
82 rational_base = 16; break;
84 var const char * base_end_ptr =
85 skip_digits(ptr,string_limit,10);
86 if (base_end_ptr == ptr) goto not_rational_syntax;
87 if (base_end_ptr == string_limit) goto not_rational_syntax;
88 if (!((*base_end_ptr == 'r') || (*base_end_ptr == 'R')))
89 goto not_rational_syntax;
90 var cl_I base = read_integer(10,0,ptr,0,base_end_ptr-ptr);
91 if (!((base >= 2) && (base <= 36))) {
92 fprint(cl_stderr, "Base must be an integer in the range from 2 to 36, not ");
93 fprint(cl_stderr, base);
94 fprint(cl_stderr, "\n");
97 rational_base = FN_to_UL(base); ptr = base_end_ptr;
103 var const char * ptr_after_prefix = ptr;
104 var cl_signean sign = 0;
105 if (ptr == string_limit) goto not_rational_syntax;
107 case '-': sign = ~sign;
111 var const char * ptr_after_sign = ptr;
112 if (flags.syntax & syntax_integer) {
113 // Check for integer syntax: {'+'|'-'|} {digit}+ {'.'|}
114 // Allow final dot only in Common Lisp syntax if there was no #<base> prefix.
115 if ((flags.lsyntax & lsyntax_commonlisp) && (ptr_after_prefix == string)) {
116 ptr = skip_digits(ptr_after_sign,string_limit,10);
117 if (ptr != ptr_after_sign)
118 if (ptr != string_limit)
121 if ((ptr == string_limit) || !(((*ptr >= '0') && (*ptr <= '9')) || ((*ptr >= 'A') && (*ptr <= 'Z') && (*ptr != 'I')) || ((*ptr >= 'a') && (*ptr <= 'z') && (*ptr != 'i')) || (*ptr == '.') || (*ptr == '_') || (*ptr == '/')))
122 return read_complex_number_rest(flags,ptr,string,string_limit,end_of_parse,
123 read_integer(10,sign,ptr_after_sign,0,ptr-ptr_after_sign));
126 ptr = skip_digits(ptr_after_sign,string_limit,rational_base);
127 if ((ptr == string_limit) || !(((*ptr >= '0') && (*ptr <= '9')) || ((*ptr >= 'A') && (*ptr <= 'Z') && (*ptr != 'I')) || ((*ptr >= 'a') && (*ptr <= 'z') && (*ptr != 'i')) || (*ptr == '.') || (*ptr == '_') || (*ptr == '/')))
128 return read_complex_number_rest(flags,ptr,string,string_limit,end_of_parse,
129 read_integer(rational_base,sign,ptr_after_sign,0,ptr-ptr_after_sign));
131 if (flags.syntax & syntax_ratio) {
132 // Check for ratio syntax: {'+'|'-'|} {digit}+ '/' {digit}+
133 ptr = skip_digits(ptr_after_sign,string_limit,rational_base);
134 if (ptr != ptr_after_sign)
135 if (ptr != string_limit)
137 var const char * ptr_at_slash = ptr;
138 ptr = skip_digits(ptr_at_slash+1,string_limit,rational_base);
139 if (ptr != ptr_at_slash+1)
140 if ((ptr == string_limit) || !(((*ptr >= '0') && (*ptr <= '9')) || ((*ptr >= 'A') && (*ptr <= 'Z') && (*ptr != 'I')) || ((*ptr >= 'a') && (*ptr <= 'z') && (*ptr != 'i')) || (*ptr == '.') || (*ptr == '_') || (*ptr == '/')))
141 return read_complex_number_rest(flags,ptr,string,string_limit,end_of_parse,
142 read_rational(rational_base,sign,ptr_after_sign,0,ptr_at_slash-ptr_after_sign,ptr-ptr_after_sign));
147 if (flags.syntax & syntax_float) {
148 // Check for floating-point number syntax:
149 // {'+'|'-'|} {digit}+ {'.' {digit}* | } expo {'+'|'-'|} {digit}+
150 // {'+'|'-'|} {digit}* '.' {digit}+ expo {'+'|'-'|} {digit}+
151 // {'+'|'-'|} {digit}* '.' {digit}+
152 var const char * ptr = string;
153 var const unsigned int float_base = 10;
154 var cl_signean sign = 0;
155 if (ptr == string_limit) goto not_float_syntax;
157 case '-': sign = ~sign;
161 var const char * ptr_after_sign = ptr;
162 var const char * ptr_after_intpart = skip_digits(ptr_after_sign,string_limit,float_base);
163 var cl_boolean have_dot = cl_false;
164 var const char * ptr_before_fracpart = ptr_after_intpart;
165 var const char * ptr_after_fracpart = ptr_after_intpart;
166 ptr = ptr_after_intpart;
167 if (ptr != string_limit)
170 ptr_before_fracpart = ptr+1;
171 ptr_after_fracpart = skip_digits(ptr_before_fracpart,string_limit,float_base);
173 ptr = ptr_after_fracpart;
174 var char exponent_marker;
175 var cl_boolean have_exponent;
176 var const char * ptr_in_exponent = ptr;
177 var const char * ptr_after_exponent = ptr;
178 if ((ptr == string_limit) || !(((*ptr >= '0') && (*ptr <= '9')) || ((*ptr >= 'A') && (*ptr <= 'Z') && (*ptr != 'I')) || ((*ptr >= 'a') && (*ptr <= 'z') && (*ptr != 'i')) || (*ptr == '.') || (*ptr == '/'))) {
180 have_exponent = cl_false;
181 // Must have at least one fractional part digit.
182 if (ptr_after_fracpart == ptr_before_fracpart) goto not_float_syntax;
183 exponent_marker = 'E';
185 have_exponent = cl_true;
186 // Must have at least one digit.
187 if (ptr_after_sign == ptr_after_intpart)
188 if (ptr_after_fracpart == ptr_before_fracpart)
189 goto not_float_syntax;
190 exponent_marker = ((*ptr >= 'a') && (*ptr <= 'z') ? *ptr - 'a' + 'A' : *ptr);
191 switch (exponent_marker) {
193 case 'S': case 'F': case 'D': case 'L':
196 goto not_float_syntax;
201 if (ptr == string_limit) goto not_float_syntax;
207 ptr_in_exponent = ptr;
208 ptr_after_exponent = skip_digits(ptr_in_exponent,string_limit,10);
209 if (ptr_after_exponent == ptr_in_exponent) goto not_float_syntax;
211 ptr = ptr_after_exponent;
212 var const char * ptr_after_prec = ptr;
213 var cl_float_format_t prec;
214 if ((ptr != string_limit) && (*ptr == '_')) {
216 ptr_after_prec = skip_digits(ptr,string_limit,10);
217 if (ptr_after_prec == ptr) goto not_float_syntax;
218 var cl_I prec1 = digits_to_I(ptr,ptr_after_prec-ptr,10);
219 var uintL prec2 = cl_I_to_UL(prec1);
220 prec = (float_base==10 ? cl_float_format(prec2)
221 : (cl_float_format_t)((uintL)((1+prec2)*log((double)float_base)*1.442695041)+1)
224 switch (exponent_marker) {
225 case 'S': prec = cl_float_format_sfloat; break;
226 case 'F': prec = cl_float_format_ffloat; break;
227 case 'D': prec = cl_float_format_dfloat; break;
228 case 'L': prec = flags.float_flags.default_lfloat_format; break;
229 case 'E': prec = flags.float_flags.default_float_format; break;
232 if (flags.float_flags.mantissa_dependent_float_format) {
233 // Count the number of significant digits.
234 ptr = ptr_after_sign;
235 while (ptr < ptr_after_fracpart && (*ptr == '0' || *ptr == '.')) ptr++;
236 var uintL num_significant_digits =
237 (ptr_after_fracpart - ptr) - (ptr_before_fracpart > ptr ? 1 : 0);
238 var uintL prec2 = (num_significant_digits>=2 ? num_significant_digits-2 : 0);
239 var cl_float_format_t precx =
240 (float_base==10 ? cl_float_format(prec2)
241 : (cl_float_format_t)((uintL)((1+prec2)*log((double)float_base)*1.442695041)+1)
243 if ((uintL)precx > (uintL)prec)
248 , if (!(flags.syntax & syntax_sfloat)) goto not_float_syntax;
249 , if (!(flags.syntax & syntax_ffloat)) goto not_float_syntax;
250 , if (!(flags.syntax & syntax_dfloat)) goto not_float_syntax;
252 if (!(flags.syntax & syntax_lfloat)) goto not_float_syntax;
254 return read_complex_number_rest(flags,ptr_after_prec,string,string_limit,end_of_parse,
255 read_float(float_base,prec,sign,ptr_after_sign,0,ptr_after_fracpart-ptr_after_sign,ptr_after_exponent-ptr_after_sign,ptr_before_fracpart-ptr_after_sign));
258 if ((flags.syntax & syntax_complex) && (flags.lsyntax & lsyntax_commonlisp)) {
259 // Check for complex number syntax:
260 // '#' {'C'|'c'} '(' realpart {' '}+ imagpart ')'
261 var const char * ptr = string;
262 if (ptr == string_limit) goto not_complex_syntax;
263 if (!(*ptr == '#')) goto not_complex_syntax;
265 if (ptr == string_limit) goto not_complex_syntax;
266 if (!((*ptr == 'C') || (*ptr == 'c'))) goto not_complex_syntax;
268 // Modified flags for parsing the realpart and imagpart:
269 var cl_read_flags flags_for_parts = flags;
270 flags_for_parts.syntax = (cl_read_syntax_t)((flags_for_parts.syntax & ~syntax_complex) | syntax_maybe_bad);
271 var const char * end_of_part;
272 if (ptr == string_limit) goto not_complex_syntax;
273 if (!(*ptr == '(')) goto not_complex_syntax;
275 var cl_R realpart = read_real(flags_for_parts,ptr,string_limit,&end_of_part);
276 if (end_of_part == ptr) goto not_complex_syntax;
278 if (ptr == string_limit) goto not_complex_syntax;
279 if (!(*ptr == ' ')) goto not_complex_syntax;
281 while ((ptr != string_limit) && (*ptr == ' ')) { ptr++; }
282 var cl_R imagpart = read_real(flags_for_parts,ptr,string_limit,&end_of_part);
283 if (end_of_part == ptr) goto not_complex_syntax;
285 if (ptr == string_limit) goto not_complex_syntax;
286 if (!(*ptr == ')')) goto not_complex_syntax;
288 at_end_of_parse(ptr);
289 return complex(realpart,imagpart);
293 if (flags.syntax & syntax_maybe_bad) {
294 ASSERT(end_of_parse);
295 *end_of_parse = string;
296 return 0; // dummy return
298 read_number_bad_syntax(string,string_limit);
301 static const cl_N read_complex_number_rest (const cl_read_flags& flags, const char * string_rest, const char * string, const char * string_limit, const char * * end_of_parse, const cl_R& x)
304 if ((flags.syntax & syntax_complex) && (flags.lsyntax & lsyntax_algebraic)) {
305 // Finish reading the "+yi" part of "x+yi".
306 // We allow "y" to begin with a '-'.
307 // We also allow the '+' to be replaced by '-', but in this case
308 // "y" may not begin with a '-'.
309 // We also allow the syntax "xi" (implicit realpart = 0).
310 var const char * ptr = string_rest;
311 if (ptr == string_limit) goto not_complex_syntax;
312 if ((*ptr == 'i') || (*ptr == 'I')) {
314 at_end_of_parse(ptr);
320 default: goto not_complex_syntax;
322 // Modified flags for parsing the imagpart:
323 var cl_read_flags flags_for_part = flags;
324 flags_for_part.syntax = (cl_read_syntax_t)((flags_for_part.syntax & ~syntax_complex) | syntax_maybe_bad);
325 var const char * end_of_part;
326 var const cl_R& realpart = x;
327 var cl_R imagpart = read_real(flags_for_part,ptr,string_limit,&end_of_part);
328 if (end_of_part == ptr) goto not_complex_syntax;
330 if (ptr == string_limit) goto not_complex_syntax;
331 if (!((*ptr == 'i') || (*ptr == 'I'))) goto not_complex_syntax;
333 at_end_of_parse(ptr);
334 return complex(realpart,imagpart);
337 at_end_of_parse(string_rest);