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1 | /* |
2 | * Printing interface for PuTTY. |
3 | */ |
4 | |
5 | #include <windows.h> |
6 | #include "putty.h" |
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7 | #include "winstuff.h" |
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8 | |
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9 | struct printer_enum_tag { |
10 | int nprinters; |
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11 | DWORD enum_level; |
12 | union { |
13 | LPPRINTER_INFO_4 i4; |
14 | LPPRINTER_INFO_5 i5; |
15 | } info; |
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16 | }; |
17 | |
18 | struct printer_job_tag { |
19 | HANDLE hprinter; |
20 | }; |
21 | |
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22 | static char *printer_add_enum(int param, DWORD level, char *buffer, |
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23 | int offset, int *nprinters_ptr) |
24 | { |
25 | DWORD needed, nprinters; |
26 | |
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27 | buffer = sresize(buffer, offset+512, char); |
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28 | |
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29 | /* |
30 | * Exploratory call to EnumPrinters to determine how much space |
31 | * we'll need for the output. Discard the return value since it |
32 | * will almost certainly be a failure due to lack of space. |
33 | */ |
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34 | EnumPrinters(param, NULL, level, buffer+offset, 512, |
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35 | &needed, &nprinters); |
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36 | |
37 | if (needed < 512) |
38 | needed = 512; |
39 | |
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40 | buffer = sresize(buffer, offset+needed, char); |
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41 | |
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42 | if (EnumPrinters(param, NULL, level, buffer+offset, |
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43 | needed, &needed, &nprinters) == 0) |
44 | return NULL; |
45 | |
46 | *nprinters_ptr += nprinters; |
47 | |
48 | return buffer; |
49 | } |
50 | |
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51 | printer_enum *printer_start_enum(int *nprinters_ptr) |
52 | { |
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53 | printer_enum *ret = snew(printer_enum); |
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54 | char *buffer = NULL, *retval; |
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55 | |
56 | *nprinters_ptr = 0; /* default return value */ |
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57 | buffer = snewn(512, char); |
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58 | |
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59 | /* |
60 | * Determine what enumeration level to use. |
61 | * When enumerating printers, we need to use PRINTER_INFO_4 on |
62 | * NT-class systems to avoid Windows looking too hard for them and |
63 | * slowing things down; and we need to avoid PRINTER_INFO_5 as |
64 | * we've seen network printers not show up. |
65 | * On 9x-class systems, PRINTER_INFO_4 isn't available and |
66 | * PRINTER_INFO_5 is recommended. |
67 | * Bletch. |
68 | */ |
69 | if (osVersion.dwPlatformId != VER_PLATFORM_WIN32_NT) { |
70 | ret->enum_level = 5; |
71 | } else { |
72 | ret->enum_level = 4; |
73 | } |
74 | |
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75 | retval = printer_add_enum(PRINTER_ENUM_LOCAL | PRINTER_ENUM_CONNECTIONS, |
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76 | ret->enum_level, buffer, 0, nprinters_ptr); |
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77 | if (!retval) |
78 | goto error; |
79 | else |
80 | buffer = retval; |
81 | |
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82 | switch (ret->enum_level) { |
83 | case 4: |
84 | ret->info.i4 = (LPPRINTER_INFO_4)buffer; |
85 | break; |
86 | case 5: |
87 | ret->info.i5 = (LPPRINTER_INFO_5)buffer; |
88 | break; |
89 | } |
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90 | ret->nprinters = *nprinters_ptr; |
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91 | |
92 | return ret; |
93 | |
94 | error: |
95 | sfree(buffer); |
96 | sfree(ret); |
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97 | *nprinters_ptr = 0; |
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98 | return NULL; |
99 | } |
100 | |
101 | char *printer_get_name(printer_enum *pe, int i) |
102 | { |
103 | if (!pe) |
104 | return NULL; |
105 | if (i < 0 || i >= pe->nprinters) |
106 | return NULL; |
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107 | switch (pe->enum_level) { |
108 | case 4: |
109 | return pe->info.i4[i].pPrinterName; |
110 | case 5: |
111 | return pe->info.i5[i].pPrinterName; |
112 | default: |
113 | return NULL; |
114 | } |
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115 | } |
116 | |
117 | void printer_finish_enum(printer_enum *pe) |
118 | { |
119 | if (!pe) |
120 | return; |
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121 | switch (pe->enum_level) { |
122 | case 4: |
123 | sfree(pe->info.i4); |
124 | break; |
125 | case 5: |
126 | sfree(pe->info.i5); |
127 | break; |
128 | } |
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129 | sfree(pe); |
130 | } |
131 | |
132 | printer_job *printer_start_job(char *printer) |
133 | { |
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134 | printer_job *ret = snew(printer_job); |
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135 | DOC_INFO_1 docinfo; |
136 | int jobstarted = 0, pagestarted = 0; |
137 | |
138 | ret->hprinter = NULL; |
139 | if (!OpenPrinter(printer, &ret->hprinter, NULL)) |
140 | goto error; |
141 | |
142 | docinfo.pDocName = "PuTTY remote printer output"; |
143 | docinfo.pOutputFile = NULL; |
144 | docinfo.pDatatype = "RAW"; |
145 | |
146 | if (!StartDocPrinter(ret->hprinter, 1, (LPSTR)&docinfo)) |
147 | goto error; |
148 | jobstarted = 1; |
149 | |
150 | if (!StartPagePrinter(ret->hprinter)) |
151 | goto error; |
152 | pagestarted = 1; |
153 | |
154 | return ret; |
155 | |
156 | error: |
157 | if (pagestarted) |
158 | EndPagePrinter(ret->hprinter); |
159 | if (jobstarted) |
160 | EndDocPrinter(ret->hprinter); |
161 | if (ret->hprinter) |
162 | ClosePrinter(ret->hprinter); |
163 | sfree(ret); |
164 | return NULL; |
165 | } |
166 | |
167 | void printer_job_data(printer_job *pj, void *data, int len) |
168 | { |
169 | DWORD written; |
170 | |
171 | if (!pj) |
172 | return; |
173 | |
174 | WritePrinter(pj->hprinter, data, len, &written); |
175 | } |
176 | |
177 | void printer_finish_job(printer_job *pj) |
178 | { |
179 | if (!pj) |
180 | return; |
181 | |
182 | EndPagePrinter(pj->hprinter); |
183 | EndDocPrinter(pj->hprinter); |
184 | ClosePrinter(pj->hprinter); |
185 | sfree(pj); |
186 | } |