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annotate lwasm/pragma.c @ 377:67373a053c49

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Add ?rts target for branch instructions Add a ?rts target for branch instructions, which brances to the nearest RTS or inverts the branch logic to branch around a generated RTS. Activated by a pragma "qrts". Thanks to Erik G <erik@6809.org> for the patch.
author William Astle <lost@l-w.ca>
date Mon, 13 Jul 2015 20:50:02 -0600
parents 35d4213e6657
children d791d47afc48
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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0
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1 /*
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2 pragma.c
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3
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4 Copyright © 2010 William Astle
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5
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6 This file is part of LWTOOLS.
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7
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8 LWTOOLS is free software: you can redistribute it and/or modify it under the
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9 terms of the GNU General Public License as published by the Free Software
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10 Foundation, either version 3 of the License, or (at your option) any later
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11 version.
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12
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13 This program is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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16 more details.
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17
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18 You should have received a copy of the GNU General Public License along with
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19 this program. If not, see <http://www.gnu.org/licenses/>.
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20 */
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21
2
7317fbe024af Clean up insane number of compiler warnings under -Wall
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22 #include <string.h>
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23 #include <ctype.h>
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24
0
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25 #include <lw_string.h>
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26 #include <lw_alloc.h>
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27
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28 #include "lwasm.h"
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29 #include "instab.h"
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30 #include "input.h"
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31
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32 struct pragma_list
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33 {
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34 const char *setstr;
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35 const char *resetstr;
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36 int flag;
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37 };
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38
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39 struct pragma_stack_entry
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40 {
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41 int magic; // must always be at the start of any input stack entry
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42 int flag; // the pragma flag bit
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43 char str[1]; // magic number - this will be allocated bigger
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44 // string will be what's needed to re-instate a pragma
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45 };
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46
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47 static const struct pragma_list set_pragmas[] =
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48 {
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49 { "dollarnotlocal", "nodollarnotlocal", PRAGMA_DOLLARNOTLOCAL },
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b6b8c2645f5c Add back the dollarlocal and nodollarlocal pragma strings for compatibility with the documentation.
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50 { "nodollarlocal", "dollarlocal", PRAGMA_DOLLARNOTLOCAL },
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51 { "noindex0tonone", "index0tonone", PRAGMA_NOINDEX0TONONE },
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52 { "undefextern", "noundefextern", PRAGMA_UNDEFEXTERN },
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53 { "cescapes", "nocescapes", PRAGMA_CESCAPES },
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54 { "importundefexport", "noimportundefexport", PRAGMA_IMPORTUNDEFEXPORT },
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55 { "pcaspcr", "nopcaspcr", PRAGMA_PCASPCR },
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56 { "shadow", "noshadow", PRAGMA_SHADOW },
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57 { "nolist", "list", PRAGMA_NOLIST },
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344cfc25afec Added initial infrastructure for pragma autobranchlength (suggested by Ebonhand on irc)
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58 { "autobranchlength", "noautobranchlength", PRAGMA_AUTOBRANCHLENGTH },
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080bb67d84f2 Add export pragma
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59 { "export", "noexport", PRAGMA_EXPORT },
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07e1fac76321 Added pragma to allow non case sensitive symbols
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60 { "symbolnocase", "nosymbolnocase", PRAGMA_SYMBOLNOCASE },
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61 { "nosymbolcase", "symbolcase", PRAGMA_SYMBOLNOCASE },
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5d969517db74 Added condundefzero pragma
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62 { "condundefzero", "nocondundefzero", PRAGMA_CONDUNDEFZERO },
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c6d2a1f54e0c Change processor target variations to pragmas.
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63 { "6809", "6309", PRAGMA_6809 },
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507f442dc71e Add support for 6800 compatibility instructions.
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64 { "6800compat", "no6800compat", PRAGMA_6800COMPAT },
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98f3e016cfd8 Add pragma to turn off forward reference optimization
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65 { "forwardrefmax", "noforwardrefmax", PRAGMA_FORWARDREFMAX },
375
71f507f404f1 Add "testmode" pragma
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66 { "testmode", "notestmode", PRAGMA_TESTMODE },
376
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67 { "c", "noc", PRAGMA_C },
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68 { "cc", "nocc", PRAGMA_CC },
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69 { "cd", "nocd", PRAGMA_CD },
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70 { "ct", "noct", PRAGMA_CT },
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71 { "qrts", "noqrts", PRAGMA_QRTS },
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72 { 0, 0, 0 }
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73 };
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74
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75 int parse_pragma_string(asmstate_t *as, char *str, int ignoreerr)
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76 {
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77 char *p;
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78 int i;
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79 const char *np = str;
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80 int pragmas = as -> pragmas;
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81
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82 while (np)
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83 {
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84 p = lw_token(np, ',', &np);
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85 debug_message(as, 200, "Setting pragma %s", p);
108
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86 for (i = 0; set_pragmas[i].setstr; i++)
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87 {
108
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88 if (!strcasecmp(p, set_pragmas[i].setstr))
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89 {
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90 pragmas |= set_pragmas[i].flag;
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91 goto out;
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92 }
108
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93 if (!strcasecmp(p, set_pragmas[i].resetstr))
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94 {
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95 pragmas &= ~(set_pragmas[i].flag);
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96 goto out;
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97 }
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98 }
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99 /* unrecognized pragma here */
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100 if (!ignoreerr)
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101 {
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102 lw_free(p);
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103 return 0;
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104 }
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105 out:
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106 lw_free(p);
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107 }
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108 as -> pragmas = pragmas;
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109 return 1;
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110 }
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111
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112 PARSEFUNC(pseudo_parse_pragma)
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113 {
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114 char *ps, *t;
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115
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116 for (t = *p; *t && !isspace(*t); t++)
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117 /* do nothing */ ;
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118
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119 ps = lw_strndup(*p, t - *p);
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120 *p = t;
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121
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122 l -> len = 0;
0
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123
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124 if (parse_pragma_string(as, ps, 0) == 0)
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125 {
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8764142b3192 Convert internal error/warning handling framework to a new unified system
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126 lwasm_register_error(as, l, E_PRAGMA_UNRECOGNIZED);
0
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127 }
81
428068681cbf Added nolist pragma to suppress listing output of non-code generating lines
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128 if (as -> pragmas & PRAGMA_NOLIST)
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129 l -> pragmas |= PRAGMA_NOLIST;
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130 lw_free(ps);
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131 }
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132
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133 PARSEFUNC(pseudo_parse_starpragma)
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lost@l-w.ca
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diff changeset
134 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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diff changeset
135 char *ps, *t;
85
8fa52c3f2970 Make *pragma work correctly
lost@l-w.ca
parents: 81
diff changeset
136
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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diff changeset
137 for (t = *p; *t && !isspace(*t); t++)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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138 /* do nothing */ ;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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139
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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140 ps = lw_strndup(*p, t - *p);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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141 *p = t;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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142
56
337301ddf74a Fixed error with pragma and *pragma directives
lost@l-w.ca
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diff changeset
143 l -> len = 0;
337301ddf74a Fixed error with pragma and *pragma directives
lost@l-w.ca
parents: 53
diff changeset
144
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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145 // *pragma must NEVER throw an error
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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146 parse_pragma_string(as, ps, 1);
81
428068681cbf Added nolist pragma to suppress listing output of non-code generating lines
Lost Wizard (lost@starbug3)
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147 if (as -> pragmas & PRAGMA_NOLIST)
428068681cbf Added nolist pragma to suppress listing output of non-code generating lines
Lost Wizard (lost@starbug3)
parents: 56
diff changeset
148 l -> pragmas |= PRAGMA_NOLIST;
376
35d4213e6657 Add cycle counting to listing
William Astle <lost@l-w.ca>
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diff changeset
149 if (as->pragmas & PRAGMA_CC)
35d4213e6657 Add cycle counting to listing
William Astle <lost@l-w.ca>
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150 {
35d4213e6657 Add cycle counting to listing
William Astle <lost@l-w.ca>
parents: 375
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151 l->pragmas |= PRAGMA_CC;
35d4213e6657 Add cycle counting to listing
William Astle <lost@l-w.ca>
parents: 375
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152 as->pragmas &= ~PRAGMA_CC;
35d4213e6657 Add cycle counting to listing
William Astle <lost@l-w.ca>
parents: 375
diff changeset
153 }
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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154 lw_free(ps);
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155 }
108
9960e05cbe3a Added *pragmapush and *pragmapop; still seems to be nonfunctional
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156
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157 static int pragma_stack_compare(input_stack_entry *e, void *d)
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158 {
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159 int flag = *((int *)d);
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160 struct pragma_stack_entry *pse = (struct pragma_stack_entry *)e;
110
38c1537857ce Pragma stack at parse stage now works
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161
108
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162 if (pse -> flag == flag)
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163 return 1;
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164 return 0;
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165 }
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166
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167 PARSEFUNC(pseudo_parse_starpragmapop)
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168 {
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169 char *ps, *t;
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170 char *pp;
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171 int i;
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172 const char *np;
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lost@l-w.ca
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173 struct pragma_stack_entry *pse;
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174
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175 for (t = *p; *t && !isspace(*t); t++)
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176 /* do nothing */ ;
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177
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178 ps = lw_strndup(*p, t - *p);
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179 *p = t;
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180
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181 l -> len = 0;
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182
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183 // *pragma stuff must never throw an error
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184 np = ps;
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185
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186 while (np)
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187 {
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188 pp = lw_token(np, ',', &np);
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189 for (i = 0; set_pragmas[i].setstr; i++)
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190 {
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191 if (!strcasecmp(pp, set_pragmas[i].setstr) || !strcasecmp(pp, set_pragmas[i].resetstr))
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192 {
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193 pse = (struct pragma_stack_entry *)input_stack_pop(as, 0x42424242, pragma_stack_compare, (void *)&(set_pragmas[i].flag));
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194 if (pse)
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195 {
110
38c1537857ce Pragma stack at parse stage now works
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196 debug_message(as, 100, "Popped pragma string %s", pse->str);
108
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197 parse_pragma_string(as, (char *)&(pse->str), 1);
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198 lw_free(pse);
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199 }
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200 if (set_pragmas[i].flag == PRAGMA_NOLIST)
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201 l -> pragmas |= PRAGMA_NOLIST;
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202 }
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203 }
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204 lw_free(pp);
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205 }
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206
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207 lw_free(ps);
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208 }
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209
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210 PARSEFUNC(pseudo_parse_starpragmapush)
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211 {
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212 char *ps, *t;
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213 char *pp;
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214 int i;
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215 const char *np;
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216 struct pragma_stack_entry *pse;
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217
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218 for (t = *p; *t && !isspace(*t); t++)
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219 /* do nothing */ ;
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220
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221 ps = lw_strndup(*p, t - *p);
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222 *p = t;
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223
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224 l -> len = 0;
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225
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226 // *pragma stuff must never throw an error
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227 np = ps;
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228
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229 while (np)
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230 {
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231 pp = lw_token(np, ',', &np);
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232 for (i = 0; set_pragmas[i].setstr; i++)
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233 {
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234 if (!strcasecmp(pp, set_pragmas[i].setstr) || !strcasecmp(pp, set_pragmas[i].resetstr))
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235 {
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236 /* found set or reset pragma */
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237 /* push pragma state */
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238 if (as -> pragmas & (set_pragmas[i].flag))
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239 {
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240 /* use set string */
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241 t = (char *)set_pragmas[i].setstr;
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242 }
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243 else
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244 {
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245 /* use reset string */
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246 t = (char *)set_pragmas[i].resetstr;
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247 }
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248 pse = lw_alloc(sizeof(struct pragma_stack_entry) + strlen(t));
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249 pse -> flag = set_pragmas[i].flag;
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250 pse -> magic = 0x42424242;
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diff changeset
251 strcpy((char *)&(pse -> str), t);
110
38c1537857ce Pragma stack at parse stage now works
lost@l-w.ca
parents: 108
diff changeset
252 debug_message(as, 100, "Pushed pragma string %s", pse->str);
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lost@l-w.ca
parents: 108
diff changeset
253
108
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254 input_stack_push(as, (input_stack_entry *)pse);
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255
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256 if (set_pragmas[i].flag == PRAGMA_NOLIST)
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257 l -> pragmas |= PRAGMA_NOLIST;
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258 }
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259 }
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260 lw_free(pp);
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261 }
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262
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263 lw_free(ps);
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264 }
9960e05cbe3a Added *pragmapush and *pragmapop; still seems to be nonfunctional
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parents: 85
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265