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325
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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
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22 #include <config.h>
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23
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24 #include <lw_string.h>
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25
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26 #include "lwasm.h"
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352
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27 #include "instab.h"
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325
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28
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29 struct pragma_list
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30 {
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31 const char *str;
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32 int flag;
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33 };
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34
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35 static const struct pragma_list set_pragmas[] =
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36 {
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37 { "dollarnotlocal", PRAGMA_DOLLARNOTLOCAL },
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38 { "noindex0tonone", PRAGMA_NOINDEX0TONONE },
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39 { "undefextern", PRAGMA_UNDEFEXTERN },
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40 { "cescapes", PRAGMA_CESCAPES },
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41 { "importundefexport", PRAGMA_IMPORTUNDEFEXPORT },
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42 { 0, 0 }
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43 };
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44
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45 static const struct pragma_list reset_pragmas[] =
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46 {
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47 { "nodollarnotlocal", PRAGMA_DOLLARNOTLOCAL },
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48 { "index0tonone", PRAGMA_NOINDEX0TONONE },
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49 { "noundefextern", PRAGMA_UNDEFEXTERN },
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50 { "nocescapes", PRAGMA_CESCAPES },
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51 { "noimportundefexport", PRAGMA_IMPORTUNDEFEXPORT },
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52 { 0, 0 }
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53 };
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54
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352
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55 int parse_pragma_string(asmstate_t *as, char *str, int ignoreerr)
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325
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56 {
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57 char *p;
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58 int i;
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59 const char *np = str;
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60 int pragmas = as -> pragmas;
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61
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62 while (np)
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63 {
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64 p = lw_token(np, ',', &np);
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65 for (i = 0; set_pragmas[i].str; i++)
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66 {
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67 if (!strcasecmp(p, set_pragmas[i].str))
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68 {
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69 pragmas |= set_pragmas[i].flag;
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70 goto out;
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71 }
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72 }
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73 for (i = 0; reset_pragmas[i].str; i++)
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74 {
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75 if (!strcasecmp(p, reset_pragmas[i].str))
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76 {
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77 pragmas &= ~(reset_pragmas[i].flag);
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78 goto out;
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79 }
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80 }
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81 /* unrecognized pragma here */
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352
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82 if (!ignoreerr)
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83 {
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84 lw_free(p);
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85 return 0;
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86 }
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325
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87 out:
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88 lw_free(p);
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89 }
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90 as -> pragmas = pragmas;
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91 return 1;
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92 }
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352
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93
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94 PARSEFUNC(pseudo_parse_pragma)
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95 {
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96 char *ps, *t;
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97
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98 for (t = *p; *t && !isspace(*t); t++)
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99 /* do nothing */ ;
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100
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101 ps = lw_strndup(*p, t - *p);
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102 *p = t;
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103
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104 if (parse_pragma_string(as, ps, 0) == 0)
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105 {
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106 lwasm_register_error(as, l, "Unrecognized pragma string");
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107 }
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108 lw_free(ps);
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109 }
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110
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111 PARSEFUNC(pseudo_parse_starpragma)
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112 {
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113 char *ps, *t;
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114
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115 for (t = *p; *t && !isspace(*t); t++)
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116 /* do nothing */ ;
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117
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118 ps = lw_strndup(*p, t - *p);
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119 *p = t;
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120
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121 // *pragma must NEVER throw an error
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122 parse_pragma_string(as, ps, 1);
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123 lw_free(ps);
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124 }
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