7 #include "cln/complex_io.h"
13 #include "cln/input.h"
14 #include "cln/real_io.h"
15 #include "cln/float_io.h"
16 #include "cln/rational_io.h"
17 #include "cln/integer_io.h"
18 #include "cln/integer.h"
22 #include "cln/abort.h"
26 #define floor cln_floor
31 // Step forward over all digits, to the end of string or to the next non-digit.
32 static const char * skip_digits (const char * ptr, const char * string_limit, unsigned int base)
34 for ( ; ptr != string_limit; ptr++) {
36 if ((ch >= '0') && (ch <= '9'))
37 if (ch < '0' + (int)base)
44 if (((ch >= 'A') && (ch < 'A'-10+(int)base))
45 || ((ch >= 'a') && (ch < 'a'-10+(int)base))
55 // Finish reading the "+yi" part of "x+yi" when "x" has already been read.
56 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);
58 #define at_end_of_parse(ptr) \
60 { *end_of_parse = (ptr); } \
62 { if ((ptr) != string_limit) { read_number_junk((ptr),string,string_limit); } }
64 const cl_N read_complex (const cl_read_flags& flags, const char * string, const char * string_limit, const char * * end_of_parse)
66 // If no string_limit is given, it defaults to the end of the string.
68 string_limit = string + ::strlen(string);
69 if (flags.syntax & syntax_rational) {
70 // Check for rational number syntax.
71 var unsigned int rational_base = flags.rational_base;
72 var const char * ptr = string;
73 if (flags.lsyntax & lsyntax_commonlisp) {
74 if (ptr == string_limit) goto not_rational_syntax;
76 // Check for #b, #o, #x, #nR syntax.
78 if (ptr == string_limit) goto not_rational_syntax;
81 rational_base = 2; break;
83 rational_base = 8; break;
85 rational_base = 16; break;
87 var const char * base_end_ptr =
88 skip_digits(ptr,string_limit,10);
89 if (base_end_ptr == ptr) goto not_rational_syntax;
90 if (base_end_ptr == string_limit) goto not_rational_syntax;
91 if (!((*base_end_ptr == 'r') || (*base_end_ptr == 'R')))
92 goto not_rational_syntax;
93 var cl_I base = read_integer(10,0,ptr,0,base_end_ptr-ptr);
94 if (!((base >= 2) && (base <= 36))) {
95 fprint(std::cerr, "Base must be an integer in the range from 2 to 36, not ");
96 fprint(std::cerr, base);
97 fprint(std::cerr, "\n");
100 rational_base = FN_to_UV(base); ptr = base_end_ptr;
106 var const char * ptr_after_prefix = ptr;
107 var cl_signean sign = 0;
108 if (ptr == string_limit) goto not_rational_syntax;
110 case '-': sign = ~sign;
114 var const char * ptr_after_sign = ptr;
115 if (flags.syntax & syntax_integer) {
116 // Check for integer syntax: {'+'|'-'|} {digit}+ {'.'|}
117 // Allow final dot only in Common Lisp syntax if there was no #<base> prefix.
118 if ((flags.lsyntax & lsyntax_commonlisp) && (ptr_after_prefix == string)) {
119 ptr = skip_digits(ptr_after_sign,string_limit,10);
120 if (ptr != ptr_after_sign)
121 if (ptr != string_limit)
124 if ((ptr == string_limit) || !(((*ptr >= '0') && (*ptr <= '9')) || ((*ptr >= 'A') && (*ptr <= 'Z') && (*ptr != 'I')) || ((*ptr >= 'a') && (*ptr <= 'z') && (*ptr != 'i')) || (*ptr == '.') || (*ptr == '_') || (*ptr == '/')))
125 return read_complex_number_rest(flags,ptr,string,string_limit,end_of_parse,
126 read_integer(10,sign,ptr_after_sign,0,ptr-ptr_after_sign));
129 ptr = skip_digits(ptr_after_sign,string_limit,rational_base);
130 if ((ptr == string_limit) || !(((*ptr >= '0') && (*ptr <= '9')) || ((*ptr >= 'A') && (*ptr <= 'Z') && (*ptr != 'I')) || ((*ptr >= 'a') && (*ptr <= 'z') && (*ptr != 'i')) || (*ptr == '.') || (*ptr == '_') || (*ptr == '/')))
131 return read_complex_number_rest(flags,ptr,string,string_limit,end_of_parse,
132 read_integer(rational_base,sign,ptr_after_sign,0,ptr-ptr_after_sign));
134 if (flags.syntax & syntax_ratio) {
135 // Check for ratio syntax: {'+'|'-'|} {digit}+ '/' {digit}+
136 ptr = skip_digits(ptr_after_sign,string_limit,rational_base);
137 if (ptr != ptr_after_sign)
138 if (ptr != string_limit)
140 var const char * ptr_at_slash = ptr;
141 ptr = skip_digits(ptr_at_slash+1,string_limit,rational_base);
142 if (ptr != ptr_at_slash+1)
143 if ((ptr == string_limit) || !(((*ptr >= '0') && (*ptr <= '9')) || ((*ptr >= 'A') && (*ptr <= 'Z') && (*ptr != 'I')) || ((*ptr >= 'a') && (*ptr <= 'z') && (*ptr != 'i')) || (*ptr == '.') || (*ptr == '_') || (*ptr == '/')))
144 return read_complex_number_rest(flags,ptr,string,string_limit,end_of_parse,
145 read_rational(rational_base,sign,ptr_after_sign,0,ptr_at_slash-ptr_after_sign,ptr-ptr_after_sign));
150 if (flags.syntax & syntax_float) {
151 // Check for floating-point number syntax:
152 // {'+'|'-'|} {digit}+ {'.' {digit}* | } expo {'+'|'-'|} {digit}+
153 // {'+'|'-'|} {digit}* '.' {digit}+ expo {'+'|'-'|} {digit}+
154 // {'+'|'-'|} {digit}* '.' {digit}+
155 var const char * ptr = string;
156 var const unsigned int float_base = 10;
157 var cl_signean sign = 0;
158 if (ptr == string_limit) goto not_float_syntax;
160 case '-': sign = ~sign;
164 var const char * ptr_after_sign = ptr;
165 var const char * ptr_after_intpart = skip_digits(ptr_after_sign,string_limit,float_base);
166 var cl_boolean have_dot = cl_false;
167 var const char * ptr_before_fracpart = ptr_after_intpart;
168 var const char * ptr_after_fracpart = ptr_after_intpart;
169 ptr = ptr_after_intpart;
170 if (ptr != string_limit)
173 ptr_before_fracpart = ptr+1;
174 ptr_after_fracpart = skip_digits(ptr_before_fracpart,string_limit,float_base);
176 ptr = ptr_after_fracpart;
177 var char exponent_marker;
178 var cl_boolean have_exponent;
179 var const char * ptr_in_exponent = ptr;
180 var const char * ptr_after_exponent = ptr;
181 if ((ptr == string_limit) || !(((*ptr >= '0') && (*ptr <= '9')) || ((*ptr >= 'A') && (*ptr <= 'Z') && (*ptr != 'I')) || ((*ptr >= 'a') && (*ptr <= 'z') && (*ptr != 'i')) || (*ptr == '.') || (*ptr == '/'))) {
183 have_exponent = cl_false;
184 // Must have at least one fractional part digit.
185 if (ptr_after_fracpart == ptr_before_fracpart) goto not_float_syntax;
186 exponent_marker = 'E';
188 have_exponent = cl_true;
189 // Must have at least one digit.
190 if (ptr_after_sign == ptr_after_intpart)
191 if (ptr_after_fracpart == ptr_before_fracpart)
192 goto not_float_syntax;
193 exponent_marker = ((*ptr >= 'a') && (*ptr <= 'z') ? *ptr - 'a' + 'A' : *ptr);
194 switch (exponent_marker) {
196 case 'S': case 'F': case 'D': case 'L':
199 goto not_float_syntax;
204 if (ptr == string_limit) goto not_float_syntax;
210 ptr_in_exponent = ptr;
211 ptr_after_exponent = skip_digits(ptr_in_exponent,string_limit,10);
212 if (ptr_after_exponent == ptr_in_exponent) goto not_float_syntax;
214 ptr = ptr_after_exponent;
215 var const char * ptr_after_prec = ptr;
216 var float_format_t prec;
217 if ((ptr != string_limit) && (*ptr == '_')) {
219 ptr_after_prec = skip_digits(ptr,string_limit,10);
220 if (ptr_after_prec == ptr) goto not_float_syntax;
221 var cl_I prec1 = digits_to_I(ptr,ptr_after_prec-ptr,10);
222 var uintC prec2 = cl_I_to_ulong(prec1);
223 prec = (float_base==10 ? float_format(prec2)
224 : (float_format_t)((uintC)((1+prec2)*::log((double)float_base)*1.442695041)+1)
227 switch (exponent_marker) {
228 case 'S': prec = float_format_sfloat; break;
229 case 'F': prec = float_format_ffloat; break;
230 case 'D': prec = float_format_dfloat; break;
231 case 'L': prec = flags.float_flags.default_lfloat_format; break;
232 case 'E': prec = flags.float_flags.default_float_format; break;
235 if (flags.float_flags.mantissa_dependent_float_format) {
236 // Count the number of significant digits.
237 ptr = ptr_after_sign;
238 while (ptr < ptr_after_fracpart && (*ptr == '0' || *ptr == '.')) ptr++;
239 var uintC num_significant_digits =
240 (ptr_after_fracpart - ptr) - (ptr_before_fracpart > ptr ? 1 : 0);
241 var uintC prec2 = (num_significant_digits>=2 ? num_significant_digits-2 : 0);
242 var float_format_t precx =
243 (float_base==10 ? float_format(prec2)
244 : (float_format_t)((uintC)((1+prec2)*::log((double)float_base)*1.442695041)+1)
246 if ((uintC)precx > (uintC)prec)
251 , if (!(flags.syntax & syntax_sfloat)) goto not_float_syntax;
252 , if (!(flags.syntax & syntax_ffloat)) goto not_float_syntax;
253 , if (!(flags.syntax & syntax_dfloat)) goto not_float_syntax;
255 if (!(flags.syntax & syntax_lfloat)) goto not_float_syntax;
257 return read_complex_number_rest(flags,ptr_after_prec,string,string_limit,end_of_parse,
258 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));
261 if ((flags.syntax & syntax_complex) && (flags.lsyntax & lsyntax_commonlisp)) {
262 // Check for complex number syntax:
263 // '#' {'C'|'c'} '(' realpart {' '}+ imagpart ')'
264 var const char * ptr = string;
265 if (ptr == string_limit) goto not_complex_syntax;
266 if (!(*ptr == '#')) goto not_complex_syntax;
268 if (ptr == string_limit) goto not_complex_syntax;
269 if (!((*ptr == 'C') || (*ptr == 'c'))) goto not_complex_syntax;
271 // Modified flags for parsing the realpart and imagpart:
272 var cl_read_flags flags_for_parts = flags;
273 flags_for_parts.syntax = (cl_read_syntax_t)((flags_for_parts.syntax & ~syntax_complex) | syntax_maybe_bad);
274 var const char * end_of_part;
275 if (ptr == string_limit) goto not_complex_syntax;
276 if (!(*ptr == '(')) goto not_complex_syntax;
278 var cl_R realpart = read_real(flags_for_parts,ptr,string_limit,&end_of_part);
279 if (end_of_part == ptr) goto not_complex_syntax;
281 if (ptr == string_limit) goto not_complex_syntax;
282 if (!(*ptr == ' ')) goto not_complex_syntax;
284 while ((ptr != string_limit) && (*ptr == ' ')) { ptr++; }
285 var cl_R imagpart = read_real(flags_for_parts,ptr,string_limit,&end_of_part);
286 if (end_of_part == ptr) goto not_complex_syntax;
288 if (ptr == string_limit) goto not_complex_syntax;
289 if (!(*ptr == ')')) goto not_complex_syntax;
291 at_end_of_parse(ptr);
292 return complex(realpart,imagpart);
295 if (flags.syntax & syntax_maybe_bad) {
296 ASSERT(end_of_parse);
297 *end_of_parse = string;
298 return 0; // dummy return
300 read_number_bad_syntax(string,string_limit);
303 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)
306 if ((flags.syntax & syntax_complex) && (flags.lsyntax & lsyntax_algebraic)) {
307 // Finish reading the "+yi" part of "x+yi".
308 // We allow "y" to begin with a '-'.
309 // We also allow the '+' to be replaced by '-', but in this case
310 // "y" may not begin with a '-'.
311 // We also allow the syntax "xi" (implicit realpart = 0).
312 var const char * ptr = string_rest;
313 if (ptr == string_limit) goto not_complex_syntax;
314 if ((*ptr == 'i') || (*ptr == 'I')) {
316 at_end_of_parse(ptr);
322 default: goto not_complex_syntax;
324 // Modified flags for parsing the imagpart:
325 var cl_read_flags flags_for_part = flags;
326 flags_for_part.syntax = (cl_read_syntax_t)((flags_for_part.syntax & ~syntax_complex) | syntax_maybe_bad);
327 var const char * end_of_part;
328 var const cl_R& realpart = x;
329 var cl_R imagpart = read_real(flags_for_part,ptr,string_limit,&end_of_part);
330 if (end_of_part == ptr) goto not_complex_syntax;
332 if (ptr == string_limit) goto not_complex_syntax;
333 if (!((*ptr == 'i') || (*ptr == 'I'))) goto not_complex_syntax;
335 at_end_of_parse(ptr);
336 return complex(realpart,imagpart);
339 at_end_of_parse(string_rest);